SynoVent E3/B3/E5/B5
Ventilator
Service Manual
Intellectual Property Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called
Mindray) owns the intellectual property rights to this product and this manual. This manual
may refer to information protected by copyrights or patents and does not convey any license
under the patent rights of Mindray, nor the rights of others. Mindray does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Mindray intends to maintain the contents of this manual as confidential information.
Disclosure of the information in this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden. Release, amendment, reproduction, distribution,
rent, adaption and translation of this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden.
、
and
are the registered trademarks or trademarks owned by
Mindray in China and other countries. All other trademarks that appear in this manual are
used only for editorial purposes without the intention of improperly using them. They are the
property of their respective owners.
Contents of this manual are subject to changes without prior notice.
Revision History
This manual has a revision number. This revision number changes whenever the manual is
updated due to software or technical specification change. Contents of this manual are subject
to change without prior notice. Revision 1.0 is the initial release of the document.

Revision number: 5.0

Release time:
2014-10
© Copyright 2011-2014 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights
reserved.
I
Preface
Manual Purpose
This manual provides detailed information about the assembling, dissembling, testing and
troubleshooting of the equipment to support effective troubleshooting and repair. It is not
intended to be a comprehensive, in-depth explanation of the product architecture or technical
implementation. Observance of the manual is a prerequisite for proper equipment
maintenance and prevents equipment damage and personal injury.
This manual is based on the maximum configuration. Therefore, some contents may not
apply to your monitor. If you have any question, please contact our Customer Service
Department.
Intended Audience
This manual is geared for biomedical engineers, authorized technicians or service
representatives responsible for troubleshooting, repairing and maintaining the ventilator
machines.
Password
A password is required to access different modes within the ventilator machine.

User maintenance: 1234

Factory maintenance: 1103
II
Table of Contents
1 Safety ................................................................................................................................. 1-1
1.1 Safety Information .......................................................................................................... 1-1
1.1.1 Dangers .............................................................................................................. 1-2
1.1.2 Warnings ............................................................................................................ 1-2
1.1.3 Cautions ............................................................................................................. 1-4
1.1.4 Notes .................................................................................................................. 1-5
1.2 Equipment Symbols ........................................................................................................ 1-6
2 Theory of Operation ........................................................................................................ 2-1
2.1 Pneumatic System ........................................................................................................... 2-1
2.1.1 Pressure Unit Conversion Table ......................................................................... 2-1
2.1.2 Pneumatic Circuit Diagram ................................................................................ 2-2
2.1.3 Parts List ............................................................................................................ 2-3
2.1.4 Symbols.............................................................................................................. 2-5
2.1.5 Theory of Operation ........................................................................................... 2-6
2.2 Electrical System........................................................................................................... 2-17
2.2.1 Electrical System Diagram ............................................................................... 2-17
2.2.2 Auxiliary Output Assembly .............................................................................. 2-17
2.2.3 Electrical Subsystem of the Main Unit ............................................................ 2-17
2.2.4 Display Electrical Subsystem ........................................................................... 2-45
3 Checkout and Test ............................................................................................................ 3-1
3.1 System Inspection ........................................................................................................... 3-1
3.2 Power Failure Test (AC Power and Buzzer) ................................................................... 3-1
3.3 Pipeline Tests .................................................................................................................. 3-2
3.3.1 O2 Pipeline Test .................................................................................................. 3-2
3.3.2 Air Pipeline Test ................................................................................................. 3-2
3.4 System Test ..................................................................................................................... 3-3
3.5 Spontaneous Breathing Test ............................................................................................ 3-4
3.6 Humidifier Performance Test .......................................................................................... 3-4
3.7 Compressor Performance Test ........................................................................................ 3-4
3.8 Alarm Tests...................................................................................................................... 3-4
3.8.1 Prepare for Alarm Tests ...................................................................................... 3-4
3.8.2 O2 Concentration Monitoring and Alarm Test.................................................... 3-5
3.8.3 Minute Volume (MV) Alarm Test ...................................................................... 3-5
3.8.4 High Paw Alarm Test ......................................................................................... 3-6
3.8.5 Low Paw Alarm Test .......................................................................................... 3-6
3.8.6 Apnea Alarm Test ............................................................................................... 3-6
3.8.7 Breath Rate Alarm Test ...................................................................................... 3-7
3.9 Function Tests ................................................................................................................. 3-7
3.9.1 Testing the Standard Working Mode .................................................................. 3-7
1
3.9.2 Tidal Volume Test ............................................................................................... 3-7
3.9.3 Trigger Function Test ......................................................................................... 3-7
3.9.4 Spontaneous Breath Test in CPAP/PSV Mode ................................................... 3-8
3.9.5 Special Function Tests ........................................................................................ 3-8
3.10 Electrical Safety Inspection........................................................................................... 3-9
3.10.1 Auxiliary Electrical Outlet Test ........................................................................ 3-9
3.10.2 Electrical Safety Inspection Test .................................................................... 3-10
3.10.3 Electrical Safety Inspection Form ...................................................................3-11
4 Maintenance and Calibration ......................................................................................... 4-1
4.1 Equipment Maintenance.................................................................................................. 4-1
4.1.1 One-year Replaceable Parts ............................................................................... 4-2
4.1.2 Three-year Replaceable Parts ............................................................................. 4-6
4.2 Software Upgrade and Software Function Activation ..................................................... 4-7
4.2.1 Software Upgrade............................................................................................... 4-7
4.2.2 Software Function Activation .......................................................................... 4-15
4.3 System Test ................................................................................................................... 4-19
4.3.1 System Check ................................................................................................... 4-20
4.3.2 Check the Mechanical Ventilation Mode ......................................................... 4-21
4.3.3 Check the Sensor Zero Point ............................................................................ 4-23
4.3.4 Check the Flow Sensor Accuracy..................................................................... 4-24
4.3.5 Check the Pressure Sensor Accuracy ............................................................... 4-25
4.4 System Calibration ........................................................................................................ 4-27
4.4.1 Flow Calibration (User) ................................................................................... 4-29
4.4.2 Flow Calibration (Factory) ............................................................................... 4-30
4.4.3 O2% Calibration (User) .................................................................................... 4-33
4.4.4 O2 Calibration (Factory) ................................................................................... 4-34
4.4.5 Pressure and Flow Zeroing............................................................................... 4-36
4.4.6 Pressure Calibration (Factory) ......................................................................... 4-37
4.4.7 Expiration Valve Calibration (Factory) ............................................................ 4-42
5 Troubleshooting ................................................................................................................ 5-1
5.1 Introduction ..................................................................................................................... 5-1
5.2 Technical Alarm Check ................................................................................................... 5-1
5.3 Pneumatic System Problems ......................................................................................... 5-10
5.3.1 Commonly Used Equipment and Tools............................................................ 5-10
5.3.2 Gas Supply Subsystem ..................................................................................... 5-10
5.3.3 Flow Control Subsystem .................................................................................. 5-18
5.3.4 Safety Valve Subsystem ................................................................................... 5-20
5.4 Hardware and Electrical System Problems ................................................................... 5-21
5.5 Troubleshoot Sensor and Valve Related Failures by Using the Valve Test Tool ........... 5-24
5.5.1 Preparations before Using the Valve Test Tool................................................. 5-24
5.5.2 Correspondence between the Sensors & Valves on the Valve Test Screen and the
Components .............................................................................................................. 5-24
2
5.5.3 Troubleshooting Methods Using Valve Test Tool ............................................ 5-28
6 Repair and Disassembly .................................................................................................. 6-1
6.1 Prepare for Disassembly ................................................................................................. 6-2
6.1.1 Tools ................................................................................................................... 6-2
6.1.2 Preparations ........................................................................................................ 6-2
6.2 Disassemble the Assemblies ........................................................................................... 6-3
6.2.1 Remove the Ventilator Power Assembly ............................................................ 6-3
6.2.2 Remove the AC-DC Power Board and DC-DC Power Board ........................... 6-3
6.2.3 Remove the Fan ................................................................................................. 6-4
6.2.4 Remove the Main Control Board, Monitoring Board, Extension Board, and
Lithium Battery ........................................................................................................... 6-5
6.2.5 Remove the O2 Sensor ....................................................................................... 6-6
6.2.6 Remove the Expiration Valve Assembly ............................................................ 6-7
6.2.7 Remove the Flow Sensor Assembly ................................................................... 6-7
6.2.8 Remove the Expiration Valve Diaphragm Assembly ......................................... 6-8
6.2.9 Remove VT50 Kernel Assembly........................................................................ 6-8
6.2.10 Remove VT30 Kernel Assembly...................................................................... 6-9
6.2.11 Remove the Gas Supply Control Assembly ................................................... 6-10
6.2.12 Remove the Expiration Valve Seat Assembly .................................................6-11
6.2.13 Remove the Filters ......................................................................................... 6-12
6.2.14 Remove the Safety Valve Gas Reservoir Assembly ....................................... 6-12
6.2.15 Remove the Inspiration Module Board .......................................................... 6-13
6.2.16 Remove the Flow Sensor ............................................................................... 6-13
6.2.17 Remove the Proportional Valve...................................................................... 6-14
6.2.18 Remove the Pneumatic Assembly .................................................................. 6-14
6.2.19 Remove the 110 cmH2O Pressure Relief Valve Assembly ............................ 6-15
6.2.20 Remove the Safety Valve Assembly ............................................................... 6-16
6.2.21 Remove the Three-way Valve and Connection Line ...................................... 6-16
6.2.22 Remove the 10 cmH2O Pressure Relief Valve ............................................... 6-17
6.2.23 Remove the Electromagnet ............................................................................ 6-18
6.2.24 Remove the Safety Valve Diaphragm Assembly ............................................ 6-18
6.2.25 Remove the Safety Valve Seat Assembly ....................................................... 6-19
6.2.26 Remove the Gas Reservoir Assembly ............................................................ 6-19
6.2.27 Remove the O2 Sensor Transitional Part ....................................................... 6-20
6.2.28 Remove VT50 Expiration Module Board PCBA ........................................... 6-20
6.2.29 Remove VT50 Heating Plate Assembly ......................................................... 6-21
6.2.30 Remove the Three-Way Valve Assembly ....................................................... 6-22
6.2.31 Remove the Expiratory Flow Sensor Seat Assembly ..................................... 6-22
6.2.32 Remove the Three-way Valve and Connection Line ...................................... 6-23
6.2.33 Remove VT50 Expiration Valve and Connection Line .................................. 6-23
6.2.34 Remove the Muffler ....................................................................................... 6-24
6.2.35 Remove the PEEP Valve Seat Assembly ........................................................ 6-24
6.2.36 Remove the Expiration Valve Locking Bar .................................................... 6-25
3
6.2.37 Remove VT50 Display Front Housing Assembly .......................................... 6-26
6.2.38 Remove VT30 Display Front Housing Assembly .......................................... 6-27
6.2.39 Remove the Key Main Board ......................................................................... 6-28
6.2.40 Remove the Speaker ....................................................................................... 6-29
6.2.41 Remove the Inverter ....................................................................................... 6-30
6.2.42 Remove the Alarm Lamp Board..................................................................... 6-31
6.2.43 Remove the Display Bracket Assembly ......................................................... 6-32
6.2.44 Remove VT50 Key Scanning Board PCBA................................................... 6-33
6.2.45 Remove VT50 Power Switch Board PCBA ................................................... 6-34
6.2.46 Remove the Copper Axis Encoder Board....................................................... 6-35
6.2.47 Remove the Touchscreen ............................................................................... 6-35
6.2.48 Remove the Display ....................................................................................... 6-36
6.2.49 Remove the Main Unit Handle....................................................................... 6-37
6.2.50 Remove the Filter Water Trap at Gas Supply Inlet ......................................... 6-38
6.2.51 Remove the Auxiliary Output Assembly ........................................................ 6-39
6.2.52 Replace the Fuse ............................................................................................ 6-40
6.2.53 Remove the Humidifier Bracket Assembly .................................................... 6-40
6.2.54 Remove the Casters ........................................................................................ 6-41
6.2.55 Remove the Cart Base, Upright Post, and Panel ............................................ 6-41
7 Electrical and Pneumatic Connections........................................................................... 7-1
7.1 Pneumatic Connections ................................................................................................... 7-1
7.1.1 Pneumatic Connection Diagram......................................................................... 7-1
7.1.2 Tubing ................................................................................................................ 7-2
7.2 Electrical Connections .................................................................................................... 7-3
7.2.1 Electrical Connection A (main unit) ................................................................... 7-3
7.2.2 Electrical Connection B (auxiliary output assembly)......................................... 7-5
7.2.3 Electrical Connection C (Inspiratory connector assembly) ................................ 7-6
7.2.4 Electrical Connection D (Expiratory connector assembly) ................................ 7-8
8 Parts .................................................................................................................................. 8-1
8.1 E3 Ventilator Main Unit Assembly ................................................................................. 8-1
8.1.1 Exploded View ................................................................................................... 8-1
8.1.2 Parts List ............................................................................................................ 8-1
8.2 E5 Ventilator Main Unit Assembly ................................................................................. 8-2
8.2.1 Exploded View ................................................................................................... 8-2
8.2.2 Parts List ............................................................................................................ 8-2
8.3 E3 Ventilator Kernel Assembly ....................................................................................... 8-3
8.3.1 Exploded View ................................................................................................... 8-3
8.3.2 Parts List ............................................................................................................ 8-3
8.4 E5 Ventilator Kernel Assembly ....................................................................................... 8-4
8.4.1 Exploded View ................................................................................................... 8-4
8.4.2 Parts List ............................................................................................................ 8-4
8.5 E3 Ventilator Rack Assembly.......................................................................................... 8-5
4
8.5.1 Exploded View ................................................................................................... 8-5
8.5.2 Parts List ............................................................................................................ 8-5
8.6 E5 Ventilator Rack Assembly.......................................................................................... 8-6
8.6.1 Exploded View ................................................................................................... 8-6
8.6.2 Parts List ............................................................................................................ 8-6
8.7 Ventilator Power Assembly ............................................................................................. 8-7
8.7.1 Exploded View ................................................................................................... 8-7
8.7.2 Parts List ............................................................................................................ 8-7
8.8 E3 Display Front Housing Assembly .............................................................................. 8-8
8.8.1 Exploded View ................................................................................................... 8-8
8.8.2 Parts List ............................................................................................................ 8-9
8.8.3 E3 Display Assembly (configured with primary display) ................................ 8-10
8.8.4 E3 Display Assembly (configured with secondary display)............................. 8-12
8.9 E5 Display Assembly .................................................................................................... 8-14
8.9.1 Exploded View ................................................................................................. 8-14
8.9.2 Parts List .......................................................................................................... 8-14
8.10 E5 Display Front Housing Assembly .......................................................................... 8-15
8.10.1 Exploded View ............................................................................................... 8-15
8.10.2 Parts List ........................................................................................................ 8-15
8.10.3 E5 Display Assembly (configured with primary display) .............................. 8-16
8.10.4 E5 Display Assembly (configured with secondary display)........................... 8-18
8.11 Gas Supply Control Assembly (VT30/DISS) .............................................................. 8-19
8.11.1 Exploded View ............................................................................................... 8-19
8.11.2 Parts List......................................................................................................... 8-20
8.12 Gas Supply Control Assembly (VT30/NIST) ............................................................. 8-21
8.12.1 Exploded View ............................................................................................... 8-21
8.12.2 Parts List ........................................................................................................ 8-22
8.13 Gas Supply Control Assembly (VT50/DISS).............................................................. 8-23
8.13.1 Exploded View ............................................................................................... 8-23
8.13.2 Parts List ........................................................................................................ 8-24
8.14 Gas Supply Control Assembly (VT50/NIST) ............................................................. 8-25
8.14.1 Exploded View ............................................................................................... 8-25
8.14.2 Parts List ........................................................................................................ 8-26
8.15 Flow Control Assembly (VT50).................................................................................. 8-27
8.15.1 Exploded View ............................................................................................... 8-27
8.15.2 Parts List ........................................................................................................ 8-27
8.16 Safety Valve Gas Reservoir Assembly ........................................................................ 8-28
8.16.1 Exploded View ............................................................................................... 8-28
8.16.2 Parts List ........................................................................................................ 8-28
8.17 Gas Reservoir Assembly ............................................................................................. 8-29
8.17.1 Exploded View ............................................................................................... 8-29
8.17.2 Parts List ........................................................................................................ 8-29
8.18 Safety Valve Assembly ................................................................................................ 8-30
8.18.1 Exploded View ............................................................................................... 8-30
5
8.18.2 Parts List ........................................................................................................ 8-30
8.19 Safety Valve Seat Assembly ........................................................................................ 8-31
8.19.1 Exploded View ............................................................................................... 8-31
8.19.2 Parts List ........................................................................................................ 8-31
8.20 Expiration Module (E3/E5) ......................................................................................... 8-32
8.20.1 Exploded View ............................................................................................... 8-32
8.20.2 Parts List ........................................................................................................ 8-32
8.21 Expiration Valve Assembly (E3/E5) ........................................................................... 8-33
8.21.1 Exploded View ............................................................................................... 8-33
8.21.2 Parts List ........................................................................................................ 8-33
8.22 Expiration Valve Flow Sensor Assembly .................................................................... 8-34
8.22.1 Exploded View ............................................................................................... 8-34
8.22.2 Parts List ........................................................................................................ 8-34
8.23 Expiration Valve Seat Assembly ................................................................................. 8-35
8.23.1 Exploded View ............................................................................................... 8-35
8.23.2 Parts List ........................................................................................................ 8-36
8.24 Three-way Valve Assembly ......................................................................................... 8-37
8.24.1 Exploded View ............................................................................................... 8-37
8.24.2 Parts List ........................................................................................................ 8-37
8.25 Expiratory Flow Sensor Seat Assembly ...................................................................... 8-38
8.25.1 Exploded View ............................................................................................... 8-38
8.25.2 Parts List ........................................................................................................ 8-38
8.26 PEEP Valve Seat Assembly ......................................................................................... 8-39
8.26.1 Exploded View ............................................................................................... 8-39
8.26.2 Parts List ........................................................................................................ 8-39
6
1 Safety
1.1 Safety Information
DANGER

Indicates an imminent hazard that, if not avoided, will result in death or serious
injury.
WARNING

Indicates a potential hazard or unsafe practice that, if not avoided, could result in
death or serious injury.
CAUTION

Indicates a potential hazard or unsafe practice that, if not avoided, could result in
minor personal injury or product/property damage.
NOTE

Provides application tips or other useful information to ensure that you get the
most from your product.
1-1
1.1.1 Dangers
There are no dangers that refer to the product in general. Specific “Danger” statements may
be given in the respective sections of this manual.
1.1.2 Warnings
WARNING

The ventilator must only be operated and used by authorized medical personnel
well trained in the use of this product. It must be operated strictly following the
Operator’s Manual.

Before putting the system into operation, the operator must verify that the
equipment, connecting cables and accessories are in correct working order and
operating condition.

The equipment must be connected to a properly installed power outlet with
protective earth contacts only. If the installation does not provide for a protective
earth conductor, disconnect it from the power line.

Use AC power source before the batteries are depleted.

To avoid explosion hazard, do not use the equipment in the presence of flammable
anesthetic agent, vapors or liquids.

Do not place the ventilator adjacent to any barrier, which can prevent cold air
from flowing, resulting in equipment overheat.

Do not open the equipment housings. All servicing and future upgrades must be
carried out by the personnel trained and authorized by us only.

Do not rely exclusively on the audible alarm system for patient monitoring.
Adjustment of alarm volume to a low level may result in a hazard to the patient.
Remember that alarm settings should be customized according to different patient
situations and always keeping the patient under close surveillance is the most
reliable way for safe patient monitoring.

The physiological parameters and alarm messages displayed on the screen of the
equipment are for doctor’s reference only and cannot be directly used as the basis
for clinical treatment.

Dispose of the package material, observing the applicable waste control regulations
andkeeping it out of children’s reach.

All staff should be aware that disassembling or cleaning some parts of the
ventilator can cause risk of infection.

Maintenance mode should be used only when the equipment is not connected to a
patient.
1-2
WARNING

Positive pressure breathing may be accompanied by some side effects such as
barotrauma, hypoventilation, hyperventilation etc.

Using the ventilator in the vicinity of high-frequency electrosurgery units,
defibrillators or short-wave therapy equipment may impair correct functioning of
the ventilator and endanger the patient.

Do not use antistatic or conductive masks or breathing hoses. They can cause burns
if they are used near high frequency electrosurgical equipment.

Do not use the ventilator in a hyperbaric chamber to avoid potential fire hazard
due to an oxygen-enriched environment.

If the equipment internal monitoring system malfunctions, an alternative plan
must be available to ensure adequate level of monitoring. The operator of the
ventilator must be responsible for proper patient ventilation and safety under all
circumstances.

As required by the relevant rules and regulations, oxygen concentration should be
monitored when the equipment is used on the patient. If your ventilator is not
configured with such monitoring function or this function is turned off, use a
monitor which complies with the relevant international rules and regulations for
oxygen concentration monitoring.

When auxiliary electrical outlets are configured, the voltage and current
specifications of the devices connected to the electrical outlets must be within the
permissible ranges for those of the electrical outlets. When the protection
grounding is defective, connection of equipment to the auxiliary electrical outlet
may increase the patient leakage current to values exceeding the allowable limits.

When the auxiliary electrical outlet does not work normally, check if the
corresponding fuse is burned.

All analog or digital products connected to this system must be certified passing the
specified IEC standards (such as IEC 60950 for data processing equipment and
IEC 60601-1 for medical electrical equipment). All configurations shall comply
with the valid version of IEC 60601-1-1. The personnel who are responsible for
connecting the optional equipment to the I/O signal port shall be responsible for
medical system configuration and system compliance with IEC 60601-1-1 as well.

Do not touch the patient when connecting the peripheral equipment via the I/O
signal ports or replacing the oxygen cell to prevent patient leakage current from
exceeding the requirements specified by the standard.

This product must be operated by doctors, respiration therapist or other specially
trained and authorized personnel. Anyone unauthorized or untrained must not
perform any operation on it.

This equipment is not suitable for use in an MRI environment.
1-3
WARNING

When the ventilator input system fails or has faults, please contact us immediately
for specified personnel to service the ventilator.

Use the humidifiers with a CE mark or recommended by us only.

The ventilator cannot use He and O2 mixed gas.

Make sure that the ventilator altitude is set up correctly. Improper altitude setup
may affect tidal volume measurement accuracy. After modifying the altitude
setting value, perform flow calibration (factory) again.

When the ventilator is restalled, or main control board is repalced, the altitude
must be reset. After reseting the altitude value, perform flow calibration (factory)
again.

Make sure to remove the O2 sensor plug before installing the O2 sensor correctly.
1.1.3 Cautions
CAUTION

The ventilator must be inspected and serviced regularly by trained service
personnel.

To ensure patient safety, always prepare pulmotor for use.

Always have a special person attend and monitor the operation of the equipment
once the ventilator is connected to the patient.

During the operation of the ventilator, do not disassemble the expiration valve and
expiratory flow sensor, which, however, can be disassembled in standby mode.

To ensure patient safety, use only parts and accessories specified in this manual.

At the end of its service life, the equipment, as well as its accessories, must be
disposed of in compliance with the guidelines regulating the disposal of such
products.

Magnetic and electrical fields are capable of interfering with the proper
performance of the equipment. For this reason make sure that all external devices
operated in the vicinity of the equipment comply with the relevant EMC
requirements. Mobile phone, X-ray equipment or MRI devices are a possible
source of interference as they may emit higher levels of electromagnetic radiation.

This system operates correctly at the electrical interference levels identified in this
manual. Higher levels can cause nuisance alarms that may stop mechanical
ventilation. Pay attention to false alarms caused by high-intensity electrical fields.
1-4
CAUTION

Before connecting the equipment to the power line, check that the voltage and
frequency ratings of the power line are the same as those indicated on the
equipment’s label or specified in this manual.

Always install or carry the equipment properly to avoid damage caused by drop,
impact, strong vibration or other mechanical force.

The ventilator keeps stable with a 10º tilt in typical configuration. Do not hang
articles on both sides of the ventilator for fear of tipping over.
1.1.4 Notes
NOTE

Put the equipment in a location where you can easily see the screen and access the
operating controls.

Keep this manual close to the equipment so that it can be obtained conveniently
when needed.

The software was developed in compliance with IEC 60601-1-4. The possibility of
hazards arising from software errors is minimized.

This manual describes all features and options. Your equipment may not have all
of them.
1-5
1.2 Equipment Symbols
Alternating current
Battery
Equipotential
Fuse
RS-232 port
CO2/calibration connection
O2↑button
O2 sensor connector
VGA input and output
connection
VGA output connection
Network connection
USB port
Air supply connection
Oxygen supply connection
Pneumatic outlet
Flow sensor
Expiratory port
Inspiratory port
Unlock
Nebulizer connection
Compressor status indicator
Compressor alarm indicator
Compressed air outlet (of
the compressor)
Central pipeline gas supply
inlet (of the compressor)
Manufacture date
Manufacturer
Serial number
Attention: Consult
accompanying documents
(this manual)
Type BF applied part.
Defibrillation-proof
protection against electric
shock.
Nurse call connection
1-6
The following definition of the WEEE label applies to EU member states only.
This symbol indicates that this product should not be treated as household
waste. By ensuring that this product is disposed of correctly, you will help
prevent bringing potential negative consequences to the environment and
human health. For more detailed information with regard to returning and
recycling this product, please consult the distributor from whom you purchased
it.
* For system products, this label may be attached to the main unit only.
1-7
FOR YOUR NOTES
1-8
2 Theory of Operation
2.1 Pneumatic System
2.1.1 Pressure Unit Conversion Table
Pa
hPa
kPa
Mpa
mmHg
1
10-2
10-3
10-6
7.5 X10-3 9.8 X 10-6
1 X 102
1
1 X 10-1
1 X 10-4
0.75
1 X 10-3
10
1
1 X 10-3
7.5
6
4
1 X 10
1 X 10
2
1.33 X 10 1.33
3
1 X 10
98.1
0.98
9.8 X 10
1 X 02
1
0.1
1 X 105
1 X 103
1 X 102
3
6.89 X 10 68.9
6.89
-2
Bar
(PSI)
1.02X10-2 1 X 10-2
1 X 10-5
1.45 X 10-4
9.8 X 10-4
1.02
1
1 X 10-3
1.45 X 10-2
9.8 X 10-3
10.2
10
1 X 10-2
0.145
1.32 X 10
0.101
1
9.8 X 10
-5
9.68 X 10
1 X 10-4
0.75
0.1
750
6.89 X 10 51.7
-3
1.36
1.33
10
1.33 X 10 1.93 X 10-2
-4
1
0.98
9.8 X 10
9.8 X 10-4
1.02
1
1 X 10-3
0.98
1.02 X103 1 X 103
6.8 X 10
2-1
145
-3
1.03 X103 1.01 X103 1.01
0.736
-3
4
1.02 X10 1 X 10
1.33 X 10 1
760
mbar
4
7.5 X 10 9.8
-4
1.01 X 105 1.01X103 101
cmH2O
3
1
0.133
atm
-2
70.3
68.9
14.7
-4
1.42 X 10-2
1.45 X 10-2
1
14.5
-2
6.89 X 10 1
2.1.2 Pneumatic Circuit Diagram
The above pneumatic circuit diagram is applicable to both E3 and E5, which do not have
differences in pneumatic circuit diagram but differ in components and some parameter
settings.
2-2
2.1.3 Parts List
Symbol
Name
Function and Index
Air Inlet
Air supply connection
Air supply inlet (with a supply pressure of 280 - 650
kPa)
O2 Inlet
O2 supply connection
O2 supply inlet (with a supply pressure of 280 - 650
kPa)
F1/F2
O2/air filter
Filtering the foreign substance and water in the
supplied gas (aperture: 5 µm)
PS1/PS2
O2/air pressure switch
Preset alarm limit of gas pressure (2.2 bar)
CV1/CV2
O2/air check valve
Ensuring unidirectional gas flow
REG
1/REG 2
O2/control regulator
Reducing and maintaining the supply pressure (1.72/2.2
bar at the rear end)
PSOL 1
PSOL 2
O2/air proportional valve
For E5 ventilators: peak flow of a single branch is
greater than or equals to 180 L/Min, and
stable flow is greater than or equals to 150 L/Min;
For E3 ventilators: peak flow of a single branch is
greater than or equals to 120 L/Min, and
stable flow is greater than or equals to 100 L/Min.
F3/F4
O2/air flow sensor filter
screen
Stabilizing air flow (aperture: 200 µm)
Q1/Q2
O2/air flow sensor
Monitoring the O2/air flow (range: 0 - 200 L/min)
OS
O2 sensor
Monitoring the O2 concentration (range: 21% - 100%)
SV
Inspiratory safety valve
When the ventilator works normally, the inspiratory
safety valve is powered and closed. While in
emergency, it is powered off and releases the pressure.
RV1
10 cmH2O pressure relief
valve
The outlet of released gas during active pressure relief
CV3
Check valve at
spontaneously inspiratory
port
Ensuring unidirectional gas flow during spontaneous
breath
RV2
110 cmH2O pressure relief
valve
Releasing gas when the pressure of inspiratory hoses
exceeds 110 cmH2O
SOL1
Three-way valve for
inspiratory pressure sensor
zeroing
Zeroing the inspiratory pressure sensor at a certain
period
PI
Inspiratory pressure sensor
Monitoring the pressure of inspiratory hoses
F5
Inspiratory filter
Preventing vapor and bacterium from entering the
ventilator. The filter aperture is 0.3 µm.
Humidifier
Humidifier
Humidifying the inhaled gas to ensure the temperature
and humidity for patients
WT
Water trap
Collecting water drops condensed in the hoses
2-3
Symbol
Name
Function and Index
F6
Expiratory filter
Preventing vapor and bacterium from entering the
expiration module. The filter aperture is 0.3 µm.
SOL2
Three-way valve for
expiratory pressure sensor
zeroing
Zeroing the expiratory pressure sensor at a certain
period
PE
Expiratory pressure sensor
Monitoring the pressure of expiratory hoses
EV
Expiration valve
Gas controlled expiration valve, which is fully opened
or forming PEEP valve with certain pressure (0 - 100
cmH2O) during the expiratory phase, and fully closed
or forming Plimit valve with certain pressure (0 - 100
cmH2O) during inspiratory phase
CV4
Expiratory check valve
Ensuring unidirectional gas flow
Expiratory heater
Heating the expiration valve and expiratory flow sensor
to prevent vapor from being condensed in the
expiration valve and expiratory flow sensor
Q3
Expiratory flow sensor
A diaphragm flow sensor that monitors the exhaled gas
flow; When gas passes through it, pressure difference
exists on both sides of the diaphragm.
PQ3
Differential pressure sensor
Monitoring the pressure difference generated by Q3
NCV
Nebulizer control valve
Opening or closing the nebulizer flow
Nebulizer
Nebulizer
Aerosolizing medication which enters the respiratory
tract with the inspiration of the patient
R1
Resistor
Controlling the nebulizer gas flow
R2
Resistor
Controlling the gas flow that flushes the expiratory
pressure sensor
R3
Resistor
Restricting the PEEP exhaust speed and providing
corresponding resistance
PEEP valve
PEEP proportional valve
Controlling the PEEP ventilation volume to ensure that
PEEP reach the set value
PP
PEEP pressure sensor
Used to monitor PEEP pressure
REG3
PEEP regulator
Used for Level 2 regulation, to stabilize the gas supply
pressure at the front end of the PEEP valve
SOL3
Three-way valve for air/O2
connection selection
Ensuring the gas supply when only a single source
works
EXH HTR
2-4
2.1.4 Symbols
Filter
Gas supply
WT
Water trap
Humidifier
On-off valve (two-way
solenoid valve)
Regulator
110 cmH2O
RV2
O2
Nebulizer
Humidifier
Relief valve
10 cmH2O
RV1
O2 sensor
P
Relief valve
Pressure sensor
Check valve
R
Resistor
Nebulizer
Q
Flow sensor
Three-way solenoid valve
EXH HTR
Heater
Proportional valve
(electromagnetic)
Expiration valve
2-5
2.1.5 Theory of Operation
The pneumatic system of the ventilator consists of six systems as shown below:
2.1.5.1 Gas Supply Subsystem
The gas supply subsystem is the starting part the ventilator pneumatic circuit. It introduces
the external pipeline supply into the ventilator. To protect the precision solenoid valve and
flow sensor in the flow control module, regulator valve and filter are included in the gas
supply module to process the supplied gas which is of high and unstable pressure and
contains some foreign substances. A pressure switch is configured to monitor the gas supply
pressure and check valve to prevent the gas flow inside the ventilator from going back into
other external gas supplies.
The gas supply subsystem consists of two parallel pneumatic circuits, namely O2 and air, as
shown below:
2-6
There are some structural differences between the components of E5 and E3. The picture
below is from E5:
O2 inlet
O2 filter F1
Air inlet
Pressure switch PS1/PS2
Nebulizer control
valve NCV
Air filter F2
O2 regulator REG1
Air regulator
REG2
PEEP regulator
REG3
Air/O2 connection
selection valve SOL3
Notes: as shown in the above picture, some components, such as the air/O2 connection
selection valve SOL3, PEEP regulator REG3, PEEP control air connector , nebulizer control
valve NCV, and nebulizer connector, are not included in the gas flow of the gas supply
subsystem because some of the components are part of other subsystems. For detailed
information, please refer to the ventilator pneumatic circuit diagram.
Meanwhile, it can be seen from the above picture that the filters used for Air and O2 branches
are both manual drainage filters. But they differ in the appearance. The size of the air filter is
greater and the material of its base is plastic. For Air filter, water is drained at the bottom by
rotating the handle. The material of the base of O2 filter is metal and water is drained by
pushing the filter gas nozzle upward.
2-7
The E3 module differs from the E5 module in that the E3 assembly integrates the gas supply
subsystem and the flow control subsystem. The gas supply subsystem of E3 is the same with
that of E5, while the flow control subsystem is shown below:
PEEP control gas
connector
Nebulization gas
connector
Proportional valve E3
PSOL1/PSOL2
Air outlet (connected with flow sensor Q1)
O2 outlet (connected with flow sensor Q1)
To fulfill the actual requirements, two kinds of connectors are configured for the air and O2
supplies, namely DISS and NIST, with AIR or O2 marks to indicate the supply gas. The
central pipeline leads the supply gas into the ventilator through the air/O2 connector. The
supply gas, with a pressure within the range of 280 - 650 KPa, flows through the filter F2/F1
and gets purified, and then through the check valves CV2/CV1, reaches the front end of the
regulator. Check valves are used to prevent the gas from flowing back. A pressure switch is
connected to the front end of the check valve to ensure that an alarm is triggered when the
pressure is lower than the set value (220 KPa) and stops when the pressure restores to the set
value. Air/O2 regulator is used to reduce the pressure of the supply gas and maintain it to the
set value which for E5 ventilators is 172 KPa, and for E3, 220 KPa. What connects the rear
end of the regulator is the flow control subsystem.
2-8
2.1.5.2 Flow Control Subsystem
The flow control subsystem is mainly used to perform accurate control (by proportional valve)
and monitoring (by inspiratory flow sensor) over the inspiratory flow and O2 concentration.
Corresponding with the gas supply subsystem, the flow control subsystem also has two
parallel branches: air and O2. The subsystem diagram is shown below:
PSOL1
F3
Q1
F4
Q2
PSOL2
The structure of the flow control subsystem of E5 ventilators are shown below:
Air inlet
O2 inlet
Proportional valve
PSOL2
Proportional valve
PSOL1
Filter screen
F3/F4
Air flow sensor Q2
O2 flow sensor Q1
Air outlet
O2 outlet
2-9
The flow control subsystem of E3 ventilators, as described previously, differs from that of E5
ventilators in the proportional valves of different types (PSOL1/PAOL2), which affects the
flow speed of corresponding gas limb. For E3 ventilators, the maximum limb peak flow
should be over 120 L/Min, and the stable flow speed should be over 100 L/Min, while for E5
ventilators, over 180 L/Min and 150 L/Min respectively. The E5 and E3 models share the
same filter screens (F3/F4), air flow sensors, and O2 flow sensors.
When the ventilator is working, the gas, after passing the gas supply subsystem, is under a
pressure of corresponding set value. It flows through the air/O2 inlet of the flow control
subsystem and enters the flow control submodule. Then the system opens the proportional
valves PSOL1 and PSOL2, and the gas flows through the filter screen and reaches the flow
sensors Q1 and Q2 of various limbs which measures the flow speeds in the limbs. The
pressure of the gas from the flow sensor is close to the air pressure. Then the gas goes into
the safety valve subsystem, where air and O2 are mixed.
2.1.5.3 Safety Valve Subsystem
The safety valve subsystem is mainly used to monitor the inspiratory pressure and ensure that
the pressure in the inspiratory limb is within the safe range. It also measures the amount of O2
in the inspiratory gas and maintains spontaneous inspiration when the system is powered off.
Below is a diagram of the safety valve subsystem:
P
PI
SOL1
OS
O2
SV
110 cmH2O
RV2
10 cmH2O
RV1
CV3
2-10
And the corresponding components are:
Gas reservoir
Gas outlet
Three-way valve for
inspiratory pressure zeroing
10 cmH2O
pressure relief
valve
Oxygen cell
Air inlet
Muffler
Check valve at
spontaneously
inspiratory port
110 cmH2O pressure
relief valve
Electromagnet
O2 inlet
The figure below shows the components of the safety valve subsystem. Flowing out from the
flow control subsystem, the air and O2 go through the flow sensor and the safety valve
connector, and enter the safety valve subsystem. Then the air and O2 first flow through the
muffler and get mixed, and then the mixed gas enters two limbs: one connected with the 110
cmH2O relief valve which opens to release gas when the inner pressure is over 110 cmH2O;
and the other, as a main limb, leads the gas into the reservoir where an Oxygen cell is
installed to monitor the O2 concentration of the output gas. At the front end of the reservoir,
there is an electromagnet, a check valve ar spontaneous inspiratory port, and a 10 cmH2O
relief valve. At the front end of the reservoir, there is an electromagnet, a check valve ar
spontaneous inspiratory port, and a 10 cmH2O relief valve. The electromagnet is used to
actively release pressure. When the pressure inside the ventilator reaches a set value, the
electromagnet opens and the gas is released through the 10 cmH2O relief valve. It also
ensures a pressure of over 10 cmH2O inside the ventilator. When the ventilator is powered off,
the electromagnet valve core restores to normal position under gravitation, the safety valve
opens, and the patient breathes spontaneously. When an inspiration is made, negative
pressure is generated in the safety valve subsystem and makes the check valve at the
spontaneous inspiration inlet open to the inner side, leading the gas into the safety valve
subsystem and then through the gas reservoir into the patient's lungs, and thus completing an
inspiration process.
The safety valve subsystem external port is the outlet of the gas reservoir. This connector is a
coaxial 22 mm conical connector, complying with ISO 5356-2:1987.
2-11
2.1.5.4 Nebulizer Control Subsystem
The nebulizer control system is mainly used to control the nebulized gas flow by the
nebulizer control valve, and thus realizing the control over the nebulizer. The pneumatic
scheme of the nebulizer control system is as shown below:
NCV
R1
The picture below shows the structure of the components:
Nebulizer control valve
NCV
Air/O2 connection
selection valve SOL3
Nebulizer channel
connector
2-12
The above picture shows the structure of nebulizer control valve NCV and nebulizer channel
connector of E5 gas supply subsystem (similar to E3 module). The NCV is a two-way
solenoid valve. The nebulizer channel connector is connected to the Φ6 PU hose in which a
nebulizer resistor R1 is connected. The front end of the R1 resistor is connected with the
rear-end gas through the air/O2 selection valve SOL3, and the rear end is connected to the
nebulizer nozzle with the Φ6 PU hose. The picture below shows the structure of the
inspiration module of E5 ventilators:
Nebulizer resistor
Nebulizer nozzle
The metal connector of the nebulizer nozzle is outside the main unit of the ventilator. When
the ventilator works well and the nozzle is connected to the nebulizer with corresponding
hoses, the system opens the nebulizer control valve NCV to release the gas through nebulizer
resistor R1 and into the nebulizer for nebulization. The nebulized flow should be within the
range of 6 - 9 L/Min.
2-13
2.1.5.5 Expiration Assembly
The expiration module is mainly used to realize pressure control and monitoring, and flow
monitoring. It differs with the inspiration module in that the gas that passes through it is the
expiratory gas from the patients, which results in the need to clean and disinfect the
components after use. Below is the pneumatic diagram:
The structure of expiration assembly is as shown below:
Expiration heat keeper
Resistor R2
PEEP control gas
supply connector
Expiration
valve assembly
(plastic)
Patient gas inlet
Expiration
valve lock
Water trap
2-14
PEEP pressure sensor PP
Expiration pressure flushing limb
Three-way valve for expiratory pressure sensor zeroing
Expiration valve heater
Differential pressure
sensor PQ3
Expiratory flow sensor
Q3
Gas outlet (outside the ventilator)
Muffler
Expiratory
pressure sensor PE
PEEP proportional valve
PEEP control gas outlet (outside the ventilator)
The gas inlet of expiration module is a coaxial 22 mm conical connector, complying with ISO
5356-2:1987. The patient end is connected to the expiration module with patient hose. When
the ventilator is running, the expiratory gas flows through the hoses and enters the expiration
module (plastic). At the entrance of the expiration module, there is a water trap used to
collect condensed water in the hoses and expiration valve. The check valve in the water trap,
when the water trap is installed, opens to lead the condensed water into the water trap. When
the collected water reaches a certain amount, the water trap should be removed from the
ventilator (which closes the check valve to avoid gas leakage) and drained to avoid airway
blockage.
When the expiratory gas enters the expiration valve, the system changes the PEEP value in
the PEEP proportional valve to a set level, which makes the PEEP valve control gas to flow
through the muffler and then out of the ventilator through the PEEP control gas outlet. As the
PEEP control gas is from the inspiration module and thus clean and uncontaminated, it does
not need any further cleaning or disinfection.
The expiratory gas passes the expiration valve and enters the expiratory flow sensor Q3, a
diaphragm flow sensor which, with the pressure sampling point, introduces the pressure
difference between the front and rear end into the pressure difference sensor PQ3.
2-15
Due to the need for disinfection (steam autoclavable at maximum 134 ℃), the expiration
valve and expiratory flow sensor are designed to be easy for removal and re-installation. In
normal use, the expiration valve is fixed to the expiration assembly by expiration valve lock,
and when you need to disinfect it, the lock can be easily unlocked for you to take the
expiration valve and the expiratory flow sensor off.
A heater and temperature sensor, controlled by the system, are located at the upper end of the
expiration valve housing to prevent the vapor from being condensed in the expiration valve
and expiratory flow sensor Q3. An expiration pressure flushing limb in which the flow is
maintained at 60 ml/min is also added to prevent the vapor in the expiratory gas from being
condensed in the pressure monitoring hoses and affecting the monitoring of expiratory gas
pressure.
2.1.5.6 Patient Hose
Patient hoses constitute the peripheral pneumatic circuit of the circuit and are independent
from the ventilator main unit. Patient hoses can be configured as needed. They function to
connect the ventilator and the patient and to humidify the patient’s inhaled gas. The
pneumatic scheme is as shown below.
F5
Humidifier
WT
Nebulizer
Patient
F6
WT
There are two kinds of patient hoses: disposable and reusable. Generally, disposable hoses
integrate hoses, water traps, and Y pieces etc. are made of medical-grade PVC materials.
They are of low cost and are discarded after use. Reusable hoses, typically, are made of
silicone which can be autoclaved for many times. The water traps and Y pieces can also be
autoclaved. Despite the high cost, reusable hoses reduce clinical cost since they can be used
for many times.
2-16
2.2 Electrical System
2.2.1 Electrical System Diagram
Please refer to7.2Electrical Connections.
2.2.2 Auxiliary Output Assembly
In practical application, the ventilator is generally used with humidifier, air compressor, and
nebulizer. A power supply scheme is adopted to keep the connection compact and in order, as
shown below. The auxiliary output assembly distributes the AC power input and supply
power for other equipments through three auxiliary output outlets. It is connected to the
ventilator with a relatively short power cord.
2.2.3 Electrical Subsystem of the Main Unit
The electrical subsystem of the ventilator consists of main control board, monitoring module
(including monitoring board, inspiration module board, and expiration module board), power
module (including AC-DC power board and DC-DC power board), extension board, mother
board, lithium battery, and related cables.
2-17
2.2.3.1 Main Control Board
The main control board is the control core of the ventilator. It functions to:

Process measurement and status information from various modules and user interface
(display, buttons, encoder, and touch screen and so on);

Control the parameter modules;

Control, receive, and process communication requests;

Exchange data with external devices;

Upgrade various module programs.
The main control board consists of CPU, FPGA, and peripheral circuit. The CPU is the
ColdFire MCF5372L manufactured by FreeScale. The peripheral circuit includes DDR
SDRAM (memory), Nor Flash, and EEPROM. FPGA is on the FlexBus main cable of the
CPU. It is mainly used for display, which takes most of the FPGA sources (including logic
sources and pin sources), and audio functions, and expands several serial ports.
The following picture shows the main control board.
Main control board
2-18
The pins of various critical connectors of main control board are defined as follows:
Network connector, J9
Pin No.
Pin name
Function
1
TX+
Network transmitting signal +
2
TX-
Network transmitting signal -
3
RX+
Network receiving signal +
4
CT1
-
5
CT1
-
6
RX-
Network receiving signal -
7
CT2
-
8
CT2
-
RS-232 connector, J4
Pin No.
Pin name
Function
1
NC
No internal connection
2
RXD
RS-232 receiving signal
3
TXD
RS-232 transmitting signal
4
NC
No internal connection
5
GND
Ground
6
NC
No internal connection
7
NC
No internal connection
8
NC
No internal connection
9
NC
No internal connection
Motherboard connector, J7 (refer to the definition of motherboard JUIC connector).
2-19
2.2.3.2 Monitoring Module
The monitoring module consists of monitoring board, inspiration module board, and
expiration module board. The monitoring board is mainly used to control the valves (solenoid
valve, proportional valve etc.), acquire and calculate parameters, and drive heaters and fans.
The inspiration module board and expiration module board are mainly for pre-processing
analog signals and switching valve control signals and heater drive signals.
There are two modules on the monitoring board, namely VCM (Ventilation Control Module),
used for ventilation control, and VPM (Ventilation Protection Module), whose CPU is MCU,
used for ventilation protection.
The following pictures show the monitoring board, inspiration module board, and expiration
board.
Monitoring board
2-20
The pins of various critical connectors of monitoring board are defined as follows:
Calibration/CO2 module connector, J2
Pin No.
Pin name
Function
1
12V
12V, CO2 module power supply
2
TXD1
Serial port transmitting signal (CO2 module)
3
RXD1
Serial port receiving signal (CO2 module)
4
NC
No internal connection
5
GND
Ground
6
12V
12V, CO2 module power supply
7
RXD2
Serial port receiving signal (calibration)
8
TXD2
Serial port transmitting signal (calibration)
9
GND
Ground
USB connector, J8
Pin No.
Pin name
Function
1
VCC_USB1
5V, USB power supply
2
USB_DM1
USB data signal -
3
USB_DP1
USB data signal +
4
GND
Ground
5
VCC_USB2
5V, USB power supply
6
USB_DM2
USB data signal -
7
USB_DP2
USB data signal +
8
GND
Ground
Motherboard connector, J5 (refer to the definition of motherboard JVMC connector).
Inspiration module board
2-21
The pins of various critical connectors of inspiration module board are defined as follows:
Air/O2 pressure switch connector, J1/J4
Pin No.
Pin name
Function
1
PS
Pressure switch signal
2
GND
Ground
O2/Air flow sensor connector, J2/J3
Pin No.
Pin name
Function
1
FLOW
Flow signal
2
TEMP
Temperature signal
3
TSI_VCC
5V, flow sensor power supply
4
GND
Ground
5
SPI_DOUT
SPI data output signal
6
SPI_CLK
SPI clock signal
7
SPI_CS
SPI chip selection signal
8
SPI_DIN
SPI data input signal
9
SPI_WP
SPI write protected signal
10
GND
Ground
Nebulizer valve connector, J6
Pin No.
Pin name
Function
1
VPP_IM
12V, nebulizer valve drive signal +
2
SOLV_NBL-
Nebulizer valve drive signal -
3
SOLV_NBL-
Nebulizer valve drive signal -
Motherboard connector, J7 (refer to the definition of motherboard JIM connector).
O2/Air inspiration valve connector, J8/J9
Pin No.
Pin name
Function
VPPBK/VPP
7V/12V, inspiration valve drive signal + (7V for E3/B3 and 12V
for E5/B5)
2
INSP-
Inspiration valve drive signal -
3
INSP-
Inspiration valve drive signal -
1
O2 sensor connector, J10
Pin No.
Pin name
Function
1
O2+
O2 sensor signal +
2
O2-
O2 sensor signal -
2-22
Inspiratory pressure zeroing three-way valve connector for , J11
Pin No.
Pin name
Function
1
VPP_IM
12V, inspiratory pressure zeroing three-way valve drive signal +
2
ZERO_INSP_PAW-
Inspiratory pressure zeroing three-way valve drive signal -
3
Reserved
Reserved
4
Reserved
Reserved
Safety valve connector, J12
Pin No.
Pin name
Function
1
VPP_IM
12V, safety valve drive signal +
2
VPP_IM
12V, safety valve drive signal +
3
SV-
Safety valve drive signal -
4
SV-
Safety valve drive signal -
Air/O2 connection selection valve connector, J13
Pin No.
Pin name
Function
1
VPP_IM
12V, Air/O2 connection selection valve drive signal +
2
SOLV_SWITCH-
Air/O2 connection selection valve drive signal -
3
SOLV_SWITCH-
Air/O2 connection selection valve drive signal -
Expiration module board
2-23
The pins of various critical connectors of expiration module board are defined as follows:
Expiratory pressure zeroing three-way valve connector, J3
Pin No.
Pin name
Function
1
VPP_EM
12V, expiratory pressure zeroing three-way valve drive signal +
2
ZERO_EXP_PAW-
Expiratory pressure zeroing three-way valve drive signal -
3
Reserved
Reserved
4
Reserved
Reserved
Motherboard connector, J4 (refer to the definition of motherboard JEM connector).
PEEP valve connector, J6
Pin No.
Pin name
Function
1
PEEP+
PEEP valve drive signal +
2
PEEP-
PEEP valve drive signal -
3
Reserved
Reserved
4
Reserved
Reserved
Heating plate connector, J7
Pin No.
Pin name
Function
1
HEATER+
Heating plate drive signal +
2
HEATER-
Heating plate drive signal -
3
TEMP1+
Heating plate thermistor +
4
TEMP1-
Heating plate thermistor -
5
TEMP2+
Heating plate thermistor +
6
TEMP2-
Heating plate thermistor -
2.2.3.3 Power Module
The power module consists of AC-DC power board and DC-DC power board. The power
module AC-DC power board switches the AC power input into DC voltage and transmits to
the DC power board which then switches the voltage into several DC voltages that meet the
requirements of the ventilator. The DC-DC power board can perform power on/off control,
and AC/battery indicator drive functions. Additional, a battery charging board is configured
on the DC-DC power board to provide charging and management of lithium batteries. The
AC-DC power board and DC-DC power board can also protect the main voltages from
overpressure and overcurrent.
2-24
The following pictures show the AC-DC power board and DC-DC power board.
AC-DC power board
The pins of various critical connectors of AC-DC power board are defined as follows:
AC input connector, J1
Pin No.
Pin name
Function
1
AC-L
AC power live wire
2
NC
No internal connection
3
AC-N
AC power neutral wire
DC output connector, J2
Pin No.
Pin name
Function
1
VXBUS
15.2V, DC voltage of AC-DC output
2
GND
Ground
2-25
DC-DC power board
The pins of various critical connectors of DC-DC power board are defined as follows:
Motherboard connector, J2 (refer to the definition of motherboard JPWR connector).
Fan connector, J3
Pin No.
Pin name
Function
1
VPP
12V, fan power supply
2
FAN_CTRL
Fan control signal
3
FAN_STATUS
Fan status signal
4
GND
Ground
DC input connector, J4
Pin No.
Pin name
Function
1
VXBUS
15.2V, DC voltage of AC-DC output
2
GND
Ground
2.2.3.4 Extension Board
The extension board is used to drive SD cards and switch VGA and nurse all signals. The SD
drive circuit is realized by an appropriative SD card controller which is a USB connector
used to transform the USB signal from the main control board into SD card driving signals.
2-26
The following picture shows the extension board.
Extension board
The pins of various critical connectors of extension board are defined as follows:
Motherboard connector, J1 (refer to the definition of motherboard JEXT connector).
Nurse call connector, J2
Pin No.
Pin name
Function
1
NURSE_CALL
Nurse call signal
VGA connector, J3
Pin No.
Pin name
Function
1
R
VGA R signal
2
G
VGA G signal
3
B
VGA B signal
4
NC
No internal connection
5
GND
Ground
6
GND
Ground
7
GND
Ground
8
GND
Ground
9
NC
No internal connection
10
GND
Ground
11
NC
No internal connection
12
NC
No internal connection
2-27
Pin No.
Pin name
Function
13
HS
VGA horizontal synchronous signal
14
VS
VGA vertical synchronous signal
15
NC
No internal connection
SD card connector, J4
Pin No.
Pin name
Function
1
DATA3
SD card data signal
2
CMD
SD card command signal
3
GND
Ground
4
VCF
3.3V, SD card power supply
5
CLK
SD card clock signal
6
GND
Ground
7
DATA0
SD card data signal
8
DATA1
SD card data signal
9
DATA2
SD card data signal
10
CD
SD card in-place detection signal
11
WP
SD card write protected detection signal
2.2.3.5 Motherboard
The motherboard is mainly used to switch signals. The main control board, monitoring board,
expiration module board, DC-DC power board, extension board, UI unit and lithium battery
are connected to the motherboard with board-to-board outlet, while the inspiration module
board is connected with cables.
The following picture shows the motherboard.
Motherboard
2-28
The pins of various critical connectors of motherboard are defined as follows:
Battery socket, JBATA/JBATD
Pin No.
Pin name
Function
1
BAT+
Battery +
2
BAT+
Battery +
3
BC
Batter in-place signal
4
BAT-
Battery -
5
NTC
Battery internal thermistor + (the negative pole of the thermistor
is connected to the negative pole of the battery)
6
BAT-
Battery -
7
BAT-
Battery -
UI unit connector, JUI
Pin No.
Pin name
Function
1
VCC
5V power supply
2
GND
Ground
3
VPP
12V power supply
4
GND
Ground
5
Reserved
Reserved
6
Reserved
Reserved
7
Reserved
Reserved
8
UART6_TX
RS-232 transmitting signal
9
UART6_RX
RS-232 transmitting signal
10
VDD_LCD
3.3V, LCD power supply
11
VDD_LCD
3.3V, LCD power supply
12
GND
Ground
13
LVDS_Y2M
LVDS data signal -
14
LVDS_Y2P
LVDS data signal +
15
GND
Ground
16
LVDS_Y3M
LVDS data signal -
17
LVDS_Y3P
LVDS data signal +
18
GND
Ground
19
LED_AC
AC status indication signal
20
GND
Ground
21
LED_BATT
Battery status indication signal
22
GND
Ground
23
UART0_RX
RS-232 transmitting signal
24
UART0_TX
RS-232 transmitting signal
25
GND
Ground
26
LVDS_Y0M
LVDS data signal -
2-29
Pin No.
Pin name
Function
27
LVDS_Y0P
LVDS data signal +
28
GND
Ground
29
LVDS_Y1M
LVDS data signal -
30
LVDS_Y1P
LVDS data signal +
31
GND
Ground
32
LVDS_CLKM
LVDS clock signal -
33
LVDS_CLKP
LVDS clock signal +
34
5B
5V, standby power supply
35
PCON1
ON/OFF control signal
36
DIMMING
Backlight brightness adjustment signal
37
BCON
Backlight switch signal
38
Reserved
Reserved
39
GND
Ground
40
Color_sel
LCD display color selection signal
41
IIC_SCL_UIC
IIC bus clock signal
42
IIC_SDA_UIC
IIC bus data signal
43
GND
Ground
44
SPK-
Speaker drive signal -
45
SPK+
Speaker drive signal +
46
GND
Ground
47
Reserved
Reserved
48
Reserved
Reserved
49
Reserved
Reserved
50
Reserved
Reserved
Main control board connector, JUIC
Pin No.
Pin name
Function
1
GND
Ground
2
LVDS_Y0M
LVDS data signal -
3
LVDS_Y0P
LVDS data signal +
4
GND
Ground
5
LVDS_Y1M
LVDS data signal -
6
LVDS_Y1P
LVDS data signal +
7
GND
Ground
8
LVDS_Y2M
LVDS data signal -
9
LVDS_Y2P
LVDS data signal +
10
GND
Ground
11
LVDS_CLKM
LVDS clock signal -
12
LVDS_CLKP
LVDS clock signal +
13
GND
Ground
14
LVDS_Y3M
LVDS data signal 2-30
Pin No.
Pin name
Function
15
LVDS_Y3P
LVDS data signal +
16
GND
Ground
17
UART1_RX
Serial port receiving signal
18
UART1_TX
Serial port transmitting signal
19
GND
Ground
20
UART2_RX
Serial port receiving signal
21
UART2_TX
Serial port transmitting signal
22
GND
Ground
23
UART7_RX
Serial port receiving signal
24
UART7_TX
Serial port transmitting signal
25
GND
Ground
26
Reserved
Reserved
27
Reserved
Reserved
28
Reserved
Reserved
29
Reserved
Reserved
30
Reserved
Reserved
31
SD_CD
SD card in-place detection signal
32
SD_WP
SD card write protected detection signal
33
NC
No internal connection
34
NC
No internal connection
35
NC
No internal connection
36
SPK-
Speaker drive signal -
37
SPK+
Speaker drive signal +
38
GND
Ground
39
R
VGA R signal
40
G
VGA G signal
41
B
VGA B signal
42
HS
VGA HS signal
43
VS
VGA VS signal
44
GND
Ground
45
Reserved
Reserved
46
Reserved
Reserved
47
GND
Ground
48
Reserved
Reserved
49
Reserved
Reserved
50
GND
Ground
51
Reserved
Reserved
52
Reserved
Reserved
53
Reserved
Reserved
54
Reserved
Reserved
55
GND
Ground
2-31
Pin No.
Pin name
Function
56
VCC_USB1
5V, USB power supply
57
SD_USB_DM
USB data signal -
58
SD_USB_DP
USB data signal +
59
GND
Ground
60
USB_DP1
USB data signal +
61
USB_DM1
USB data signal -
62
USB_DP2
USB data signal +
63
USB_DM2
USB data signal -
64
VCC_USB2
5V, USB power supply
65
VDD_LCD
3.3V, LCD power supply
66
GND
Ground
67
Color_sel
LCD display color selection signal
68
BCON
Backlight switch signal
69
UART0_TX
RS-232 transmitting signal
70
UART0_RX
RS-232 receiving signal
71
GND
Ground
72
UART6_TX
RS_232 transmitting signal
73
UART6_RX
RS-232 receiving signal
74
GND
Ground
75
Reserved
Reserved
76
Reserved
Reserved
77
Reserved
Reserved
78
GND
Ground
79
IIC_SCL_UIC
IIC bus clock signal
80
IIC_SDA_UIC
IIC bus data signal
81
GND
Ground
82
PCON2
ON/OFF control signal
83
Reserved
Reserved
84
Reserved
Reserved
85
AC_DET
AC in-place detection signal
86
BATD_DET
Battery in-place detection signal
87
BATA_DET
Battery in-place detection signal
88
GND
Ground
89
VDD
3.3V power supply
90
VDD
3.3V power supply
91
GND
Ground
92
GND
Ground
93
VCC
5V power supply
94
VCC
5V power supply
95
GND
Ground
96
GND
Ground
2-32
Extension board connector, JEXT
Pin No.
Pin name
Function
1
VDD
3.3V power supply
2
VDD
3.3V power supply
3
VCC
5V power supply
4
VCC
5V power supply
5
Reserved
Reserved
6
Reserved
Reserved
7
Reserved
Reserved
8
Reserved
Reserved
9
GND
Ground
10
GND
Ground
11
GND
Ground
12
Reserved
Reserved
13
Reserved
Reserved
14
GND
Ground
15
Reserved
Reserved
16
Reserved
Reserved
17
GND
Ground
18
NC
No internal connection
19
Reserved
Reserved
20
GND
Ground
21
NC
No internal connection
22
GND
Ground
23
GND
Ground
24
Reserved
Reserved
25
Reserved
Reserved
26
GND
Ground
27
Reserved
Reserved
28
NURSE_CALL
Nurse call signal
29
GND
Ground
30
Reserved
Reserved
31
Reserved
Reserved
32
GND
Ground
33
GND
Ground
34
GND
Ground
35
GND
Ground
36
GND
Ground
37
GND
Ground
38
GND
Ground
39
GND
Ground
2-33
Pin No.
Pin name
Function
40
GND
Ground
41
R
VGA R signal
42
G
VGA G signal
43
B
VGA B signal
44
HS
VGA HS signal
45
VS
VGA VS signal
46
GND
Ground
47
Reserved
Reserved
48
Reserved
Reserved
49
GND
Ground
50
Reserved
Reserved
51
Reserved
Reserved
52
GND
Ground
53
Reserved
Reserved
54
SD_CD
SD card in-place detection signal
55
GND
Ground
56
SD_WP
SD card write protected detection signal
57
Reserved
Reserved
58
GND
Ground
59
Reserved
Reserved
60
Reserved
Reserved
61
GND
Ground
62
Reserved
Reserved
63
Reserved
Reserved
64
GND
Ground
65
Reserved
Reserved
66
Reserved
Reserved
67
Reserved
Reserved
68
Reserved
Reserved
69
Reserved
Reserved
70
Reserved
Reserved
71
Reserved
Reserved
72
Reserved
Reserved
73
Reserved
Reserved
74
Reserved
Reserved
75
GND
Ground
76
Reserved
Reserved
77
Reserved
Reserved
78
GND
Ground
79
Reserved
Reserved
80
Reserved
Reserved
2-34
Pin No.
Pin name
Function
81
GND
Ground
82
NC
No internal connection
83
Reserved
Reserved
84
GND
Ground
85
SD_USB_DM
USB data signal -
86
SD_USB_DP
USB data signal +
87
GND
Ground
88
Reserved
Reserved
89
Reserved
Reserved
90
GND
Ground
91
NC
No internal connection
92
NC
No internal connection
93
GND
Ground
94
NC
No internal connection
95
GND
Ground
96
GND
Ground
Monitoring board connector, JVMC
Pin No.
Pin name
Function
1
PCON1
ON/OFF control signal
2
VBUS
Voltage after AC-DC output combined with battery
3
VXBUS
DC voltage of AC-DC output
4
5B
5V, standby power supply
5
VCC_USB1
5V, USB power supply
6
VCC_USB2
5V, USB power supply
7
O2V+
O2 inspiration valve drive signal +
8
O2V-
O2 inspiration valve drive signal -
9
AIRV+
Air inspiration valve drive signal +
10
AIRV-
Air inspiration valve drive signal -
11
SV+
Safety valve drive signal +
12
SV-
Safety valve drive signal -
13
VPPIM
12V power supply
14
Reserved
Reserved
15
ZEROV_INSP_PAW-
Inspiratory pressure zeroing three-way valve drive signal -
16
SOLV_NBL-
Nebulizer valve drive signal -
17
GND
Ground
18
SPI_CLK
SPI clock signal
19
SPI_DOUT
SPI data output signal
20
SPI_CS_O2
SPI chip selection signal
21
SPI_CS_EEPROM
SPI chip selection signal
22
AC_DET
AC in-place detection signal
2-35
Pin No.
Pin name
Function
23
GND
Ground
24
P_PEEP
PEEP pressure signal
25
VC
10.5V power supply
26
GND
Ground
27
FLOW_O2
O2 flow signal
28
TEMP_O2
O2 temperature signal
29
FLOW_AIR
Air flow signal
30
TEMP_AIR
Air temperature signal
31
O2
O2 concentration signal
32
Reserved
Reserved
33
GND
Ground
34
GND
Ground
35
GND
Ground
36
GND
Ground
37
FAN_CTRL
Fan control signal
38
FAN_STATUS
Fan status signal
39
Reserved
Reserved
40
Reserved
Reserved
41
Reserved
Reserved
42
SOLV_SWITCH-
Air/O2 switchover three-way valve drive signal -
43
Reserved
Reserved
44
Reserved
Reserved
45
Reserved
Reserved
46
Reserved
Reserved
47
PS_O2
O2 pressure switch signal
48
PS_AIR
Air pressure switch signal
49
GND
Ground
50
SPI_DIN
SPI data input signal
51
SPI_WP
SPI write protected signal
52
SPI_CS_AIR
SPI chip selection signal
53
USB_DP1
USB data signal +
54
USB_DM1
USB data signal -
55
GND
Ground
56
Reserved
Reserved
57
AVCC
5V power supply
58
VREF
2.5V power supply
59
GND
Ground
60
P_INSP
Inspiratory pressure signal
61
Reserved
Reserved
62
Reserved
Reserved
63
NURSE_CALL
Nurse call signal
2-36
Pin No.
Pin name
Function
64
Reserved
Reserved
65
VDD
3.3V power supply
66
VDD
3.3V power supply
67
VCC
5V power supply
68
VCC
5V power supply
69
VPP
12V power supply
70
VPP
12V power supply
71
VBB
Busbar voltage after powered on
72
VPPBK
7V power supply
73
ZERO_EXP_PAW-
Expiratory pressure zeroing three-way valve drive signal -
74
VPP_EM
12V power supply
75
HEATER-
Heating plate drive signal -
76
HEATER+
Heating plate drive signal +
77
PEEP-
PEEP valve drive signal -
78
PEEP+
PEEP valve drive signal +
79
GND
Ground
80
UART1_TX
Serial port transmitting signal
81
UART1_RX
Serial port receiving signal
82
UART2_TX
Serial port transmitting signal
83
UART2_RX
Serial port receiving signal
84
GND
Ground
85
UART7_TX
Serial port transmitting signal
86
UART7_RX
Serial port receiving signal
87
USB_DP2
USB data signal +
88
USB_DM2
USB data signal -
89
Reserved
Reserved
90
Reserved
Reserved
91
GND
Ground
92
FLOW_EXP
Expiratory flow signal
93
Reserved
Reserved
94
TEMP_HEATER1
Heating plate temperature signal
95
TEMP_HEATER2
Heating plate temperature signal
96
TEMP_POWER
Power board temperature signal
2-37
Inspiration module board connector, JIM
Pin No.
Pin name
Function
1
O2V+
O2 inspiration valve drive signal +
2
O2V-
O2 inspiration valve drive signal -
3
AIRV+
Air inspiration valve drive signal +
4
AIRV-
Air inspiration valve drive signal -
5
SV+
Safety valve drive signal +
6
SV-
Safety valve drive signal -
7
VPP_IM
12V power supply
8
ZERO_INSP_PAW-
Inspiratory pressure zeroing three-way valve drive signal -
9
VPP_EM
12V power supply
10
Reserved
Reserved
11
SOLV_SWITCH-
Air/O2 switchover three-way valve drive signal -
12
SOLV_NBL-
Nebulizer drive signal -
13
PS_O2
O2 pressure switch signal
14
PS_AIR
Air pressure switch signal
15
SPI_CLK
SPI clock signal
16
GND
Ground
17
SPI_DIN
SPI data input signal
18
SPI_DOUT
SPI data output signal
19
GND
Ground
20
SPI_WP
SPI write protected signal
21
SPI_CS_O2
SPI chip selection signal
22
SPI_CS_AIR
SPI chip selection signal
23
SPI_CS_EEPROM
SPI chip selection signal
24
NC
No internal connection
25
Reserved
Reserved
26
GND
Ground
27
Reserved
Reserved
28
GND
Ground
29
Reserved
Reserved
30
VC
10.5V power supply
31
GND
Ground
32
Reserved
Reserved
33
AVCC
5V power supply
34
GND
Ground
35
Reserved
Reserved
36
VREF
2.5V power supply
37
GND
Ground
38
Reserved
Reserved
39
P_PEEP
PEEP pressure signal
2-38
Pin No.
Pin name
Function
40
GND
Ground
41
Reserved
Reserved
42
FLOW_O2
O2 flow signal
43
GND
Ground
44
TEMP_O2
O2 temperature signal
45
P_INSP
Inspiratory pressure signal
46
O2
O2 concentration signal
47
FLOW_AIR
Air flow signal
48
TEMP_AIR
Air temperature signal
49
Reserved
Reserved
50
Reserved
Reserved
Expiration module board connector, JEM
Pin No.
Pin name
Function
1
Reserved
Reserved
2
Reserved
Reserved
3
VPP_EM
12V power supply
4
HEATER-
Heating plate drive signal -
5
HEATER+
Heating plate drive signal +
6
PEEP-
PEEP valve drive signal -
7
PEEP+
PEEP valve drive signal +
8
GND
Ground
9
Reserved
Reserved
10
SPI_CLK
SPI clock signal
11
SPI_DOUT
SPI data output signal
12
GND
Ground
13
Reserved
Reserved
14
GND
Ground
15
TEMP_HEATER2
Heating plate temperature signal
16
GND
Ground
17
P_EXP
Expiratory pressure signal
18
GND
Ground
19
Reserved
Reserved
20
Reserved
Reserved
21
GND
Ground
22
P_PEEP
PEEP pressure signal
23
NC
No internal connection
24
NC
No internal connection
25
VPP_EM
12V power supply
26
HEATER-
Heating plate drive signal -
27
HEATER+
Heating plate drive signal +
2-39
Pin No.
Pin name
Function
28
PEEP-
PEEP valve drive signal -
29
PEEP+
PEEP valve drive signal +
30
GND
Ground
31
Reserved
Reserved
32
SPI_CLK
SPI clock signal
33
SPI_DOUT
SPI data output signal
34
GND
Ground
35
Reserved
Reserved
36
GND
Ground
37
TEMP_HEATER2
Heating plate temperature signal
38
GND
Ground
39
P_EXP
Expiratory pressure signal
40
GND
Ground
41
Reserved
Reserved
42
Reserved
Reserved
43
GND
Ground
44
P_PEEP
PEEP pressure signal
45
Reserved
Reserved
46
Reserved
Reserved
47
VPP_EM
12V power supply
48
HEATER-
Heating plate drive signal -
49
HEATER+
Heating plate drive signal +
50
PEEP-
PEEP valve drive signal -
51
PEEP+
PEEP valve drive signal +
52
GND
Ground
53
GND
Ground
54
GND
Ground
55
GND
Ground
56
GND
Ground
57
GND
Ground
58
GND
Ground
59
GND
Ground
60
GND
Ground
61
GND
Ground
62
GND
Ground
63
GND
Ground
64
GND
Ground
65
GND
Ground
66
GND
Ground
67
Reserved
Reserved
68
Reserved
Reserved
2-40
Pin No.
Pin name
Function
69
VPP_EM
12V power supply
70
HEATER-
Heating plate drive signal -
71
HEATER+
Heating plate drive signal +
72
PEEP-
PEEP valve drive signal -
73
PEEP+
PEEP valve drive signal +
74
Reserved
Reserved
75
Reserved
Reserved
76
SPI_DIN
SPI data input signal
77
SPI_WP
SPI write protected signal
78
GND
Ground
79
Reserved
Reserved
80
GND
Ground
81
TEMP_HEATER1
Heating plate temperature signal
82
GND
Ground
83
FLOW_EXP
Expiratory flow signal
84
GND
Ground
85
VREF
2.5V power supply
86
AVCC
5V power supply
87
GND
Ground
88
VC
10.5V
89
ZERO_EXP_PAW-
Expiratory pressure zeroing three-way valve drive signal -
90
ZERO_EXP_PAW-
Expiratory pressure zeroing three-way valve drive signal -
91
VPP_EM
12V power supply
92
HEATER-
Heating plate drive signal -
93
HEATER+
Heating plate drive signal +
94
PEEP-
PEEP valve drive signal -
95
PEEP+
PEEP valve drive signal +
96
Reserved
Reserved
97
Reserved
Reserved
98
SPI_DIN
SPI data input signal
99
SPI_WP
SPI write protected signal
100
GND
Ground
101
Reserved
Reserved
102
GND
Ground
103
TEMP_HEATER1
Heating plate temperature signal
104
GND
Ground
105
FLOW_EXP
Expiratory flow signal
106
GND
Ground
107
VREF
2.5V power supply
108
AVCC
5V power supply
109
GND
Ground
2-41
Pin No.
Pin name
Function
110
VC
10.5V
DC-DC board connector, JPWR
Pin No.
Pin name
Function
1
IIC_SCL_UIC
IIC bus clock signal
2
GND
Ground
3
IIC_SDA_UIC
IIC bus data signal
4
GND
Ground
5
PCON2
ON/OFF control signal
6
Reserved
Reserved
7
GND
Ground
8
Reserved
Reserved
9
AC_DET
AC in-place detection signal
10
BATD_DET
Battery in-place detection signal
11
GND
Ground
12
BATA_DET
Battery in-place detection signal
13
PCON1
ON/OFF control signal
14
GND
Ground
15
BATD-
Battery -
16
BATD+
Battery +
17
Reserved
Reserved
18
Reserved
Reserved
19
Reserved
Reserved
20
Reserved
Reserved
21
BCA
Battery in-place signal
22
NTCA
Battery internal thermistor + (the negative pole of the thermistor
is connected to the negative pole of the battery)
23
VPPBK
7V power supply
24
VPPBK
7V power supply
25
GND
Ground
26
GND
Ground
27
GND
Ground
28
GND
Ground
29
GND
Ground
30
GND
Ground
31
GND
Ground
32
VBUS
Voltage after AC-DC output combined with battery
33
GND
Ground
34
FAN_STATUS
Fan status signal
35
FAN_CTRL
Fan control signal
36
GND
Ground
2-42
Pin No.
Pin name
Function
37
BATD-
Battery -
38
BATD+
Battery +
39
Reserved
Reserved
40
Reserved
Reserved
41
Reserved
Reserved
42
Reserved
Reserved
43
BATA-
Battery -
44
BATA+
Battery +
45
GND
Ground
46
VBB
Busbar voltage after powered on/off
47
GND
Ground
48
VPP
12V power supply
49
GND
Ground
50
VCC
5V power supply
51
GND
Ground
52
VDD
3.3V power supply
53
GND
Ground
54
VXBUS
DC voltage of AC-DC output
55
GND
Ground
56
TEMP_POWER
Power board temperature signal
57
LED_AC
AC status indication signal
58
LED_BATT
Battery status indication signal
59
BATD-
Battery -
60
BATD+
Battery +
61
Reserved
Reserved
62
Reserved
Reserved
63
Reserved
Reserved
64
Reserved
Reserved
65
BATA-
Battery -
66
BATA+
Battery +
67
GND
Ground
68
VBB
Busbar voltage after powered on/off
69
GND
Ground
70
VPP
12V power supply
71
GND
Ground
72
VCC
5V power supply
73
GND
Ground
74
VDD
3.3V power supply
75
GND
Ground
76
VPP_FAN
12V power supply
77
GND
Ground
2-43
Pin No.
Pin name
Function
78
5B
5V, standby power supply
79
PCON1
ON/OFF control signal
80
DIMMING
Backlight brightness adjustment signal
81
BATD-
Battery -
82
BATD+
Battery +
83
Reserved
Reserved
84
Reserved
Reserved
85
Reserved
Reserved
86
Reserved
Reserved
87
BATA-
Battery -
88
BATA+
Battery +
89
GND
Ground
90
VBB
Busbar voltage after powered on/off
91
GND
Ground
92
VPP
12V power supply
93
GND
Ground
94
VCC
5V power supply
95
GND
Ground
96
VDD
3.3V power supply
97
GND
Ground
98
VPP_FAN
12V power supply
99
GND
Ground
100
5B
5V, standby power supply
101
PCON1
ON/OFF control signal
102
DIMMING
Backlight brightness adjustment signal
103
BATD-
Battery -
104
BATD+
Battery +
105
Reserved
Reserved
106
Reserved
Reserved
107
Reserved
Reserved
108
Reserved
Reserved
109
BATA-
Battery -
110
BATA+
Battery +
2-44
2.2.4 Display Electrical Subsystem
The display electrical subsystem consists of key control board, key scanning board (left), key
scanning board (right), power switch board, alarm lamp board, encoder board, inverter, LCD,
touch screen, speaker, and corresponding cables.
2.2.4.1 Key Control Board
The key control board is mainly used to process input messages of buttons, encoder, and
touch screen, switch signals from speakers and alarm lamp, and also drive some LEDs. There
are two controllers on the key control board, one is MCU used to process input messages
from buttons and encoder, and the other is a touch screen controller used to process input
messages on the touch screen. Both the controllers communicate with the main control board
through RS-232 connector.
The following picture shows the key control board:
Key control board
The pins of various critical connectors of key control board are defined as follows:
Key scanning board (left) connector, J1
Pin No.
Pin name
Function
1
KEY_OUT1
Row scanning signal (output)
2
5V
5V power supply
3
KEY_OUT0
Row scanning signal (output)
4
GND
Ground
2-45
Pin No.
Pin name
Function
5
RA0
Row scanning signal (input)
6
LED_AC+
AC indicator control signal
7
RA1
Column scanning signal (input)
8
LED_BATT+
Battery indicator control signal+
9
RA2
Column scanning signal (input)
10
LED_BATT+
Battery indicator control signal-
11
RA6
Column scanning signal (input)
12
UR_H_IN
Touchscreen input signal
13
LED_O2
O2↑ indicator control signal
14
LR_XL_IN
Touchscreen input signal
15
LED_NEBUL
Nebulizer indicator control signal
16
AD3_IN
Touchscreen input signal
17
LED_LOCKSC
REEN
Lockscreen indicator control signal
18
UL_YT_IN
Touchscreen input signal
19
PCON_SW
Power switch signal
20
LL_YB_IN
Touchscreen input signal
Key scanning board (right) connector, J2
Pin No.
Pin name
Function
1
KEY_OUT3
Row scanning signal (output)
2
5V
5V power supply
3
KEY_OUT2
Row scanning signal (output)
4
ENCODE_A
Rotary encoder input A
5
RA0
Column scanning signal (input)
6
ENCODE_B
Rotary encoder input B
7
RA1
Column scanning signal (input)
8
ENCODE_Y
Rotary encoder input Y
9
RA2
Column scanning signal (input)
10
GND
Ground
11
RA6
Column scanning signal (input)
12
GND
Ground
13
GND
Ground
14
GND
Ground
15
Reserved
Reserved
16
GND
Ground
17
Reserved
Reserved
18
GND
Ground
19
Reserved
Reserved
20
Reserved
Reserved
2-46
Inverter connector, J3
Pin No.
Pin name
Function
1
12V
12V power supply
2
12V
12V power supply
3
GND
Ground
4
GND
Ground
5
BCON
Backlight switch signal
6
DIMMING
Backlight brightness adjustment signal
Main unit connector, J4
Pin No.
Pin name
Function
1
5V
5V power supply
2
PCON1
ON/OFF control signal
3
RS-232_KB_TX
RS-232 transmitting signal (key control board CPU)
4
LED_AC
AC status indication signal
5
RS-232_KB_RX
RS-232 receiving signal (key control board CPU)
6
LED_BATT
Battery status indication signal
7
GND
Ground
8
GND
Ground
9
5V
5V power supply
10
12V
12V power supply
11
RS-232_TC_TX
RS-232 transmitting signal (touchscreen controller)
12
BCON
Backlight switch signal
13
RS-232_TC_RX
RS-232 receiving signal (touchscreen controller)
14
DIMMING
Backlight brightness adjustment signal
15
GND
Ground
16
GND
Ground
17
SPK-
Speaker drive signal -
18
IIC_SCL_UIC
IIC bus clock signal
19
SPK+
Speaker drive signal +
20
IIC_SDA_UIC
IIC bus data signal
Speaker connector, J5
Pin No.
Pin name
Function
1
SPK+
Speaker drive signal +
2
SPK-
Speaker drive signal -
Alarm lamp board connector, J6
Pin No.
Pin name
Function
1
12V
12V power supply
2
GND
Ground
2-47
Pin No.
Pin name
Function
3
IIC_SCL_UIC
IIC bus clock signal
4
IIC_SDA_UIC
IIC bus data signal
5
3.3V
3.3V power supply
2.2.4.2 Key Scanning Board (Left)
The key scanning board (left) is mainly used to realize button input, LED indicating, and
signal switch functions.
The following picture shows the key scanning board (left):
Key scanning board (left)
The pins of various critical connectors of key scanning board (left) are defined as follows:
Key control board connector, J1 (refer to the definition of key control board J1 connector).
Touchscreen connector, J2
Pin No.
Pin name
Function
1
RL
Touchscreen signal
2
RT
Touchscreen signal
3
SG
Touchscreen signal
4
LT
Touchscreen signal
5
LL
Touchscreen signal
Power switch board connector, J3
Pin No.
Pin name
Function
1
PCON_SW
Power switch signal
2
GND
Ground
3
LED_AC
AC status indication signal
4
5V
5V power supply
5
LED_BATT+
Battery status indication signal +
6
LED_BATT-
Battery status indication signal -
2-48
2.2.4.3 Key Scanning Board (Right)
The key scanning board (right) is mainly used to realize button input and signal switch
functions.
The following picture shows the key scanning board (right):
Key scanning board (right)
The pins of various critical connectors of key scanning board (right) are defined as follows:
Encoder connector, J1
Pin No.
Pin name
Function
1
5V
5V power supply
2
Encode_A
Encoder input signal
3
Encode_B
Encoder input signal
4
Encode_Y
Encoder input signal
5
GND
Ground
Key control board connector, J2 (refer to the definition of key control board J2 connector).
2.2.4.4 Power Switch Board
The power switch is mainly used to power on/off the ventilator with buttons and run LED
indicator drive.
The following picture shows the power switch board:
Power switch board
The pins of various critical connectors of power switch board are defined as follows:
Key scanning board (left) connector, J3 (refer to the definition of key scanning board (left) J3
connector).
2-49
2.2.4.5 Alarm Lamp Board
The alarm board is mainly used to indicate alarms, which is realized by an LED driver with
IIC connector.
The following picture shows the alarm lamp board:
Alarm lamp board
The pins of various critical connectors of alarm lamp board are defined as follows:
Key control board connector, J1 (refer to the definition of key control board J6 connector).
2-50
3 Checkout and Test
WARNING

After servicing the equipment or replacing its components, compelete all the tests
in this section.

Before doing the tests in this section, completely reassemble the equipment and
refer to 4 Maintenance and Calibration to do necessary calibrations.
3.1 System Inspection
NOTE

Make sure that the breathing system is correctly connected and not damaged.
Make sure that:
1.
The equipment is not damaged.
2.
All components are correctly attached.
3.
The breathing system (including the expiration valve, humidifier, and nebulizer etc.) is
correctly connected and the breathing tubes are not damaged.
4.
The gas supplies are correctly connected and the pressures are correct.
5.
Cylinder valves are closed on models with cylinder supplies.
6.
The casters are not loose and the brake (s) is set and prevents movement.
7.
The power cord is correctly connected. The AC mains indicator and the battery indicator
work normally.
8.
The ventilator is switched on or off normally.
3.2 Power Failure Test (AC Power and Buzzer)
1.
Connect the ventilator to the AC power source. Both the AC power indicator and battery
indicator should come on. If the AC power indicator is not lit, check the fuse and
power board.
3-1
2.
Turn on the ventilator. Set the switch to
position.
3.
Unplug the power cord with the system turned on. The massage [Battery in Use] is
displayed. Meanwhile, the AC power indicator is extinguished and the battery indicator
is flashing.
4.
Reconnect the AC power, and press [Alarm Reset] button. The prompt message
disappears. The AC power indicator is illuminated. The battery indicator stops flashing
and stays on.
5.
Remove the battery, and disconnect the AC power. The ventilator should be shut off and
the buzzer buzz for more than 120 seconds. If the buzzer does not respond, check the
buzzer circuit.
3.3 Pipeline Tests
3.3.1 O2 Pipeline Test
1.
Connect an O2 pipeline supply.
2.
Connect the test lungs.
3.
Turn on the ventilator.
4.
Select [New Patient] in standby mode. After entering the new patient screen, set patient
type to [Adu] and vent type to [NIV]. Confirm the settings and exit. Select [Start
Ventilation] to allow the ventilator to enter ventilation status.
5.
Ensure that the ventilator ventilates well.
6.
Disconnect the O2 pipeline supply.
7.
As O2 pressure decreases, the alarm [O2 Supply Pressure Low] should occur.
3.3.2 Air Pipeline Test
1.
Connect an air pipeline/compressor supply.
2.
Connect the test lungs.
3.
Turn on the ventilator.
4.
Select [New Patient] in standby mode. After entering the new patient screen, set patient
type to [Adu] and vent type to [NIV]. Confirm the settings and exit. Select [Start
Ventilation] to allow the ventilator to enter ventilation status.
5.
Ensure that the ventilator ventilates well.
3-2
6.
Disconnect the air pipeline/compressor supply.
7.
As air pressure decreases, the alarm [AIR Pressure Low] should occur.
3.4 System Test
1.
Push the [Standby] key. Standby screen appears after your confirmation. The
standby screen displays the latest system check time and system check result. Select
[Syst. Check]. Connect air and oxygen supplies and block the patient wye as prompted.
Select [Ok] to start system check item by item.
2.
System check items include:
3.
4.

O2 flow sensor test: test the O2 inspiratory valve and O2 flow sensor;

Air flow sensor test: test air inspiratory valve and air flow sensor;

Expiratory flow sensor test;

Pressure sensor test: test the pressure sensors at the inspiratory and expiratory
ports;

Expiration valve test;

Safety valve test;

O2 sensor test;

Leakage (mL/min);

Compliance (mL/cmH2O); and

Circuit resistance (cmH2O/L/s).
System check result can be:

Pass: indicates that check of this item is completed and is passed.

Fail: indicates that check of this item is not completed and is failed.

Cancel: indicates that check of this item is not completed;

Gas supply not connected: indicates that air/O2 supply may not be connected when
air/O2 flow sensor test is being carried out;

Sensor Off: indicates that the sensor may not be turned on when O2 sensor test is
being carried out.
When system check is being performed, the system prompts [Running] on the right side
of the current check item. In this case, if you select [Skip], the system stops check of
this item immediately and displays [Cancel]. Check of the next item begins at the same
time. If you select [Stop], the system stops check of the current item and also check of
the remaining items, and displays [Cancel].
3-3
5.
When checks of all items are completed, if you select [Retry], the system starts a new
round of check. When [Exit] is selected, the system exits check and enters standby
screen.
6.
Make sure that all the [Syst. Check] items pass the test.
3.5 Spontaneous Breathing Test
1.
Turn off the ventilator. Wear a mask, and check if the spontaneous breathing is
smoothful.
2.
Turn on the ventilator and switch to [Standby] mode. Wear a mask, and check if the
spontaneous breathing is smoothful.
3.6 Humidifier Performance Test
For detailed performance test information, please refer to the Instructions for Use of the
humidifier. Make sure that the humidifier works well.
3.7 Compressor Performance Test
For detailed performance test information, please refer to the Instructions for use of the
compressor. Make sure that the compressor works well.
3.8 Alarm Tests
3.8.1 Prepare for Alarm Tests
1.
Connect test lungs to the Y piece patient connection.
2.
Turn on the ventilator. Select [New Patient] in standby mode. Set [Patient Type] to
[Adu] and [Vent Type] to [Invasive].
3.
Set the ventilator controls as follows:

Ventilator mode: [V-A/C]

O2 Concentration [O2%]: 40%

Tidal volume [TV]: 300 ml

Inspiration time/Inspiration and expiration ratio [Tinsp]/[I:E]: 2s/I:E
3-4

Breath rate [f]: 10 bpm

Inspiratory flow [flow]: 20 L/min

Positive end-expiratory pressure [PEEP]: 3 cm H2O

Maximum pressure limit [Plimit]: 40 cmH2O
Note: if no special clarification, the working mode of the ventilator in this chapter refers to
standard working status.
4.
Switch the ventilator to working mode.
5.
Make sure that:

The ventilator displays the correct data.

The inspiration and expiration of the test lungs are in normal period.
3.8.2 O2 Concentration Monitoring and Alarm Test
NOTE

Make sure that the O2 sensor is turned on.
1.
Connect to O2 supply only.
2.
Set the [O2%] to 40%. Check the alarm message filed and make sure that the alarm
[FiO2 Too High] is displayed on the screen.
3.
Set the [O2%] to 100%. Check the alarm message filed and make sure that the alarm
[FiO2 Too High] disappears.
4.
Connect to Air supply only.
5.
Set the [O2%] to 40%. Check the alarm message filed and make sure that the alarm
[FiO2 Too Low] is displayed on the screen.
6.
Set the [O2%] to 21%. Check the alarm message filed and make sure that the alarm
[FiO2 Too Low] disappears.
7.
Set the alarm limit to default value.
3.8.3 Minute Volume (MV) Alarm Test
1.
Set the [MV Low Alarm Limit] to 5L.
2.
Check the alarm message area and make sure that the alarm [MV Too Low] is displayed
on the screen.
3.
Set the lower alarm limit of [MV] to 2L.
3-5
4.
Check the alarm message area and make sure that the alarm [MV Too Low]
disappears.
5.
Set the upper alarm limit of [MV] to 2.5L.
6.
Check the alarm message area and make sure that the alarm [MV Too High] is
displayed on the screen.
7.
Set the upper alarm limit of [MV] to 5L.
8.
Check the alarm message area and make sure that the alarm [MV Too High] disappears.
9.
Set the alarm limit to default value.
3.8.4 High Paw Alarm Test
1.
Set the pressure limit to 20 cmH2O.
2.
Set the paw high alarm limit to 20 cmH2O.
3.
Increase the tidal volume until the peek pressure reaches the high alarm limit. Make sure
that the alarm [Paw Too High] is displayed on the screen.
4.
Decrease the tidal volume until the peek pressure is lower than the high alarm limit.
Make sure that the alarm [Paw Too High] disappears.
5.
Set the alarm limit to default value.
3.8.5 Low Paw Alarm Test
1.
In working mode, disconnect the test lungs.
2.
Make sure that the alarm [Paw Too Low] is displayed on the screen.
3.
Reconnect the test lungs, and the ventilator restores to normal working status. The alarm
[Paw Too Low] disappears.
3.8.6 Apnea Alarm Test
1.
In working mode, set the apnea alarm time to 15 s.
2.
Set the breath rate to 3 bpm. Check the alarm message filed and make sure that the
alarm [Apnea] is displayed on the screen.
3.
Set the breath rate to 10 bpm. Check the alarm message filed and make sure that the
alarm [Apnea] disappears.
4.
Set the alarm limit to default value.
3-6
3.8.7 Breath Rate Alarm Test
1.
In working mode, set the upper breath rate alarm limit to 15 bpm.
2.
Set the breath rate to 20 bpm. Check the alarm message filed and make sure that the
alarm [ftot Too High] is displayed on the screen.
3.
Set the breath rate to 10 bpm. Check the alarm message filed and make sure that the
alarm [ftot Too High] disappears.
4.
Set the alarm limit and breath rate to default values.
3.9 Function Tests
3.9.1 Testing the Standard Working Mode
Turn on the ventilator and switch on the gas supply, and make sure that the ventilator is in
working mode.

Ventilator mode: [V-A/C]

O2 concentration [O2%]: 40%

Tidal volume [TV]: 300 ml

Inspiration time/Inspiration and expiration ratio [Tinsp]/[I:E]: 2s/I:E

Breath rate [f]: 10 bpm

Inspiratory flow [flow]: 20 L/min

Positive end-expiratory pressure [PEEP]: 3 cmH2O

Maximum pressure limit [Plimit]: 40 cmH2O
3.9.2 Tidal Volume Test
Turn on the ventilator and connect the test lungs. When the tidal volume becomes stable,
observe the tidal volume displayed on the screen. Make sure that the displayed data is stable
and the monitoring results are consistent with the set value.
3.9.3 Trigger Function Test
1.
Set the pressure trigger sensibility to -2 cmH2O. Wear a mask and inspire slightly. When
the airway pressure is a bit lower than this set value, check if the ventilator starts
ventilation, and if a trigger icon is displayed on the screen.
3-7
2.
Set the flow trigger sensibility to 2 cmH2O. Wear a mask and inspire slightly. When the
inspiration flow is a bit lower than this set value, check if the ventilator starts ventilation,
and if a trigger icon is displayed on the screen.
3.9.4 Spontaneous Breath Test in CPAP/PSV Mode
1.
Set the ventilator to CPAP/PSV mode, flow trigger to 2 L/min, pressure support level to
15 cmH2O, and other parameters to their default values.
2.
Wear a mask and inspire slightly. When the trigger sensitivity is reached, make sure that
inspiration starts and that the ventilator starts PSV ventilation.
3.9.5 Special Function Tests

Inspiration Hold
1.
In working mode, press and hold the [Insp. Hold] key for 5 seconds. Make sure that the
ventilator starts inspiration hold function.
2.
Release the [Insp. Hold] key, and make sure the ventilator enters expiration phase.

Expiration Hold
1.
In working mode, press and hold the [Exp. Hold] key for 5 seconds. Make sure that the
ventilator starts expiration hold function.
2.
Release the [Exp. Hold] key, and make sure that the ventilator enters inspiration phase.

Oxygenation
1.
In working mode, select Adult mode, and press [O2↑] button. Make sure that the
ventilator starts to supply 100% oxygen.
2.
Press the [O2↑] button again. Make sure that the ventilator restores to the previous
working status.

Suction
1.
Push the [Main Menu] key and select [Tool], and then [Procedure]. Select [Suction] to
access the suction procedure screen. Make sure that the ventilator enters the first phase:
[O2↑ Before Suction].
2.
Disconnect the patient hoses. Make sure that the ventilator enters the second phase:
[Suction Phase].
3-8
3.
Re-connect the patient hoses. Make sure that the ventilator enters the third phase: [O2↑
After Suction].

Nebulizer
1.
In working mode, press [Nebulizer] button. Make sure that the ventilator starts
nebulizer function, and if there is gas at the nebulizer output.
2.
After one minute, press the [Nebulizer] button again. Make sure that the ventilator
terminates nebulizer function.

Manual Breath
In working mode, press [Manual Breath] button. Make sure that the ventilator delivers
a mechanical ventilation immediately.

Sigh
1.
Make sure that the ventilator is working.
2.
Push the [Main Menu] key. Select [System] and then [Ventilator]. Set sigh to
[Δint.PEEP] and set [Δint.PEEP] to 5 cmH2O. Make sure that the ventilator starts sigh
function once in every 3 minutes, and if the sigh started within two continuous
ventilation cycles is effective.
3.
Push the [Main Menu] key. Select [System] and then [Ventilator]. Set sign to [TV],
and set the ventilation parameter [Sigh] to [ON]. Make sure that the ventilator starts a
sign every one hundred breaths or 7 minutes (depending on which period is shorter), and
if the started sigh delivers 1.5 times of the set tidal volume.
3.10 Electrical Safety Inspection
NOTE

Perform electrical safety inspection after servicing or routine maintenance. Before
the electrical safety inspection, make sure all the covers, panels, and screws are
correctly installed.

The electrical safety inspection should be performed once a year.
3.10.1 Auxiliary Electrical Outlet Test
Verify the mains voltage is present at each auxiliary outlet when the ventilator is connected
with power.
3-9
3.10.2 Electrical Safety Inspection Test
1.
Perform protective earth resistance test:
a. Plug the probes of the analyzer into the protective earth terminal and equipotential
terminal of the AC power cord.
b. Test the earth resistance with a current of 25 A.
c. Verify the resistance is less than 0.1ohms (100 mohms).
d. Plug the probes of the analyzer into the protective earth terminal of the AC power
cord and the protective earth terminal of any auxiliary outlet. Repeat steps b and c.
e. If the resistance is larger than 0.1ohms (100 mohms) but less than 0.2ohms (200
mohms), disconnect the AC power cord and plug the probe that is previously plugged in
the protective earth terminal of the AC power cord into the protective earth contact of
the power outlet. Repeat steps a to d.
2.
Connect the compressor, if configured, to the auxiliary electrical outlet.
3.
Perform the following earth leakage current tests:
4.

normal polarity;

reverse polarity;

normal polarity with open neutral; and

reverse polarity with open neutral.
Verify the maximum leakage current does not exceed 500 μA (0.5 mA) in the first two
tests. While for the last two tests, verify that the maximum leakage current does not
exceed 1000 μA (1 mA).
NOTE

Make sure the safety analyzer is authorized by certificate organizations (UL, CSA,
or AMAI etc.). Follow the instructions of the analyzer manufacturer.

If cart is not configured, do not perform auxiliary outlet related tests, and the
above mentioned AC power outlet should refer to the power outlet of the
equipment.
3-10
3.10.3 Electrical Safety Inspection Form
Location:
Technician:
Equipment:
Control Number:
Manufacturer:
Model:
SN:
Measurement equipment /SN:
Date of Calibration:
INSPECTION AND TESTING
Pass/Fail
1
Auxiliary mains socket outlets
2
Protective Earth Resistance
3
Ω
Limit
Max 0.1 Ω
Normal
condition(NC)
____μA
Single Fault
condition(SFC)
____μA
Max:
NC: 500μA
SFC: 1000μA
Earth
Leakage
For periodically performance, all the test items included in the ELECTRICAL SAFETY
INSPECTION FORM shall be performed. After the equipment is repaired with main unit
disassembled, perform the test items 1 and 2 when the power supply PCBA is neither
repaired nor replaced, or perform all the test items when the power supply PCBA is repaired
or replaced.
3-11
FOR YOUR NOTES
3-12
4 Maintenance and Calibration
WARNING

When it comes to test and maintain the equipment, make sure that the patient is
disconnected from the equipment.

The equipment may have been used on patients carrying infectious diseases. Before
testing or maintaining the equipment, wear sterile rubber gloves to reduce the risk
of being infected.

When the equipment to be maintained contains blood or other secretion, clean,
disinfect and sterilize the equipment by strictly following the control and safety
handling procedures for infectious diseases.
4.1 Equipment Maintenance
To ensure the long-term reliability and stability of the ventilator, periodical maintenance of
the equipment and replacement of its parts must be performed by authorized service
personnel. For details about parts replacement, refer to 6Repair and Disassembly. Periodical
parts replacement can be carried out every year and every three years after installation. Make
records of the parts that have been replaced before the periodical replacement.
NOTE

These schedules are the minimum frequency based on typical usage of 2000 hours
per year. You should service the equipment more frequently if you use it more than
the typical yearly usage.

To avoid equipment damage or personal injury, replace the parts which need to be
replaced periodically even if they are not worn or damaged when the due date
arrives.
4-1
4.1.1 One-year Replaceable Parts
List of one-year service package (801-VT50-00114-00):
SN
P/N
Description
Qty
1
082-000739-00
Seal. O type 6.5 X1.5 Viton A75 Blake
4
2
082-000565-00
Seal. O type 31.47 X1.78 Silicone A50 Red
1
3
049-000081-00
Diaphragm for check valve
1
4
082-000753-00
Filter. Filter core (5 μm), (maintenance package)
2
5
082-001240-00
Filter core F92G-KIT 5um
1
6
082-001062-00
Small filter, accuracy of 0.22μm, diameter of 25mm
3
7
047-001349-00
Dust filter for PCB chamber
1
4.1.1.1 Parts Replacement
1.
As required, replace the seal for expiration valve assembly (082-000739-00) every 12
months.
Seal (082-000739-00)
4-2
2.
As required, replace the seal for expiration valve cover (082-000565-00) every 12
months.
Seal for the expiration valve
cover (082-000565-00)
3.
As required, replace the diaphragm for expiration valve/spontaneous breath check valve
(049-000081-00) every 12 months.
Check valve diaphragm (049-000081-00)
4-3
4.
As required, replace the filter of the air supply inlet assembly every 12 months (filter
core (5 μm), (082-000753-00)) (filter core. F92G-KIT 5um (082-001240-00)).
Filter core
F92G-KIT 5um
(082-001240-00)
Filter core
(082-000753-00)
5.
As required, replace the small filters at the front end of expiratory flow sensor and
differential pressure sensor and the small filter at the front end of inspiratory pressure
sensor every 12 months. The P/N of the small filter is “082-001062-00” (small filter,
accuracy of 0.22μm, diameter of 25mm).
Small filter
(082-001062-00)
4-4
Replace the small filter (082-001062-00) between the sampling line of expiratory differential
pressure sensor and sampling line of expiratory flow sensor. There are two sampling paths
here. Replace the filter on each path. The filter end marked “PTFE 0.22um” is the inlet which
should be connected to the sampling connector of expiratory flow sensor.
Small filter
(082-001062-00)
Replace the small filter (082-001062-00) between the inspiratory pressure sensor and
inspiratory pressure zeroing three-way valve. The filter end marked “PTFE 0.22um” is the
inlet which should be connected to the inspiratory pressure zeroing three-way valve.
4-5
6.
As required, replace the dust filter for PCB chamber (047-001349-00) every 12 months.
Dust filter for PCB
chamber
(047-001349-00)
4.1.1.2 Checkout and Test of the Ventilator
Perform the following mantenance procedures every 12 months: For detailed information,
please refer to 3Checkout and Test and 4.4 System Calibration.
4.1.2 Three-year Replaceable Parts
List of three-year service package (801-VT50-00115-00):
SN
P/N
Description
Qty
1
022-000008-00
Battery, Li-ion, 11.1V, 4500mAh, LI23S002A
1 or 2
2
M05-010R03---
Cell battery, Lithium, 3V, 35mAh, D12.5*2.0
1
Note: After replacing the cell battery, the system time should be reset.
4-6
4.2 Software Upgrade and Software Function
Activation
CAUTION

Software upgrade and software configuration activation can be performed by
professional service personnel only.
You can perform software upgrade on the ventilator by downloading the upgrade software
through network or by using USB device. You can also perform online upgrade of the
software supported configuration through the activation code.
4.2.1 Software Upgrade
You can upgrade the following programs on the ventilator by downloading the upgrade
software through network:

Booting software

System software

Multi-language library

General configuration (requires password )

Main control board FPGA display drive software

MO2B module software

Monitoring module software

Auxiliary monitoring module software

Key board software
CAUTION

Before software upgrade, disconnect the ventilator from the patient and back up
the important data.
4-7
NOTE

Make sure that the version of the upgrade package is the desired one. To obtain the
latest upgrade package, please contact us.

Before upgrading the system software, check the version information of the booting
software. If it is not the latest, upgrade the booting software to the latest version
first and make sure of software compatibility.
You can select the following operations to upgrade the corresponding software based on your
requirement. You must perform 4.2.1.1 Network Connection before upgrading any software.
4.2.1.1 Network Connection
NOTE

Before upgrading any software, make sure that the network cable, Hub, and
notebook computer are connected correctly and reliably.

The recommended length of the network cable is not greater than 1 m.
Perform network connection as follows before software upgrade:
1.
Connect the ventilator, Hub and notebook computer by using the straight through cable.
Connect the Hub to the power source and make sure that the network is connected.
2.
Select [Main Menu] hot key and then [Set IP Address >>] to check the current IP
address of the ventilator, which is 192.168.23.250 by default.
3.
Set the IP address of the notbook computer. Make sure that the IP address of the
ventilator is in the same IP segment with the notebook computer. For example, if the
current IP address of the ventilator is the default “192.168.23.250”, the IP address of the
notebook can be set to “192.168.23.23”.
4.2.1.2 Booting Software Network Upgrade
CAUTION

Switching off or powering off the equipment during booting software upgrade can
cause system down.
NOTE

When selecting the upgrade package, make sure that the checksum and version are
same to that provided by the factory.
4-8
To upgrade the booting software of the ventilator:
1.
Run the network upgrade downloading software on the notebook computer to access the
software upgrade screen.
2.
Click [Select Package] to enter the [Select Package] menu.
3.
Click [>>>]. Select the booting software of the ventilator (code: BIOS) in the dialog box
and then click [Open] to confirm.
4.
Check the checksum and version of the booting software as shown below:
5.
If the checksum and version are correct, click [Ok].
6.
Click [Start (Single)] on the main screen.
7.
Re-start the ventilator to start to upgrade the booting software.
8.
Wait for the message prompting upgrade success. Select the [Main Menu] hot key, then
[Maintenance >>], then [System Information >>], and then [Version Information >>]
to check the version information of the booting software.
4-9
NOTE

After completing booting software upgrade, turn on the ventilator to confirm the
correctness of upgrade software version information.
4.2.1.3 System Software Network Upgrade
NOTE

Before upgrading the system software, check the version information of the booting
software. If it is not the latest, upgrade the booting software to the latest version
first and make sure of software compatibility.

Before upgrading the system software, record the current settings of the ventilator
so as to restore the pre-upgrade settings after software upgrade.

When selecting the upgrade package, make sure that the checksum and version are
same to those provided by the factory. You also need to check the machine code
corresponding to the ventilator to be upgraded.
Before upgrading the system software, note the matching between machine name and
machine code as listed below:
Machine name
Machine
Code
Remarks
VT 30/35
B3/E3
/
VT 50/55
B5/E5
/
To upgrade the system software:
1.
Check and confirm that the booting software of the ventilator is of the latest version. If
not, refer to 4.2.1.2 Booting Software Network Upgrade to upgrade to the latest version.
4-10
2.
When selecting the system software upgrade package, confirm the correctness of
checksum and version. You also need to check the machine code, as shown below:
3.
Other operations are similar to those for booting software upgrade. Refer to 4.2.1.2
Booting Software Network Upgrade to finish the upgrade.
NOTE

After completing system software upgrade, turn on the ventilator to confirm the
correctness of upgrade software version information.

After completing system software upgrade, restore the pre-upgrade settings of the
system settings which are saved in case of power failure.
4.2.1.4 Module Software Network Upgrade
NOTE

When selecting the upgrade package, make sure that the checksum and version are
same to those provided by the factory. You also need to check the module code
corresponding to the ventilator to be upgraded.
4-11
The module software mentioned here includes monitor module software, auxiliary
monitoring module software, key board software and MO2B CO2 module software. Their
upgrade procedures are similar to those for booting software upgrade except that when
selecting the upgrade package, apart from making sure of the correctness of checksum and
version, you also need to confirm the module code corresponding to the module to be
upgraded.
Before upgrading the module software, note the matching between module name and module
code as listed below:
Module name
Module code
Monitoring Module
VCM
Auxiliary
module
VPM
monitoring
Key board
KEYBOARD
MO2B CO2
0611-CO2-MO2B
To upgrade the module software:
1.
When selecting the module software upgrade package, confirm the correctness of
checksum and version. You also need to check the module code, as shown below:
4-12
2.
Other operations are similar to those for booting software upgrade. Refer to 4.2.1.2
Booting Software Network Upgrade to finish the upgrade.
NOTE

After completing module software upgrade, turn on the ventilator to confirm the
correctness of upgrade software version information.
4.2.1.5 Combination Package Network Upgrade
The operations to upgrade the combination package is the same with those for system
software upgrade. Please refer to related section.
NOTE

After completing combination package software upgrade, you need to confirm the
upgraded versions of each software.

If the upgrade of an individual software fails, you will need to upgrade all the
software in the combination package, including those upgraded successfully.
4.2.1.6 USB Device Upgrade
NOTE

Make sure that the version of the upgrade package is the desired one. To obtain the
latest upgrade package, please contact us.
1.
Save the upgrade package and the configuration file of the same name under the
directory of UPGRADE of USB device.
2.
Set the upgrade mode of USB device in the system software. Select [Main Menu] →
[Service] → enter the required password → [Setup] → [System]. Set [Update] to
[On].
3.
Insert the USB device into the USB port of the ventilator. Restart the ventilator and the
ventilator enters upgrade process.
4.
After upgrade is completed, remove the USB device and restart the ventilator. Check if
the machine upgrade is completed.
4-13
NOTE

When there are combination package and single upgrade package file in the USB
device, the combination package is upgraded by default. To upgrade a single
upgrade package, you need to delete the combination package from the USB device
first.

Each time when different packets for USB device upgrade are upgraded, the
configuration files generated simultaneously need to be put in.

After upgrading booting software upgrade packet, make sure to upgrade the
system software upgrade package.

When making the combination upgrage package, put VCM module software
package on the last to prevent the buzzer from making sound during the upgrade.
4.2.1.7 Commonly-encountered Problems and Recommended Actions
Failure description
Possible cause
Recommended solution
During upgrade, the buzzer on
the main control board buzzes
long, resulting in upgrade
failure.
The BIOS program of the
main control board is
damaged due to possible
power failure during upgrade
or upgrade failure.
Return the main control board to
factory for repair.
In case of system software
upgrade, the upgrade screen
can be accessed but upgrade is
always failed.
The version of BIOS program
is incompatible with that of
system software.
The network is not stable.
1. Check the compatibility of
software version. Select the
appropriate version for upgrade.
Refer
to
the
system
software-BIOS-upgrade
tool
compatibility table.
2. Check the network connection
between the notebook computer,
Hub and ventilator to make sure
that the network cable is not
loose.
After
software
upgrade
success, only V-A/C mode is
available.
The selected system software
only supports V-A/C mode.
1. Check the upgrade package,
and reply for another one.
The upgrade booting screen is
inaccessible.
The network is not in good
condition.
1. Re-check the network
connection
between
the
notebook computer, Hub and
ventilator. Check that the
network cable is connected
4-14
Failure description
Possible cause
Recommended solution
correctly and reliably.
2. Make sure that Hub is
powered on.
After the system software or
XX module software is
upgraded,
XX
module
communication
stop
is
alarmed.
The version of system
software does not match that
of XX module software. Or,
the module is damaged.
Re-confirm
the
version
information of XX module
software and the module code. If
they are correct, return the faulty
module to factory for repair.
4.2.2 Software Function Activation
The factory can activate all the functions listed in the following table through activation
codes. When the user wants to add any function listed in this table, the service engineer can
apply to the factory for activation code so as to activate the corresponding function.
Configurable function
Influence on the software interface
Remarks
NTV
Not involved
Paid configuration
DuoLevel
PRVC
APRV
P0.1
PEEPi
NIF
Not involved. If none of the functions is configured,
the special function property page is not displayed in
the main menu.
Suction
WOB
Not displayed
RSBI
4-15
4.2.2.1 Apply for Software Function Activation Code
NOTE

To apply for activation code, you must provide the relevant information of the
ventilator whose configurations are to be activated, such as machine ID, existing
configuration and configuration to be activated.
When the user wants to add any paid configuration listed in the above table, the service
engineer must apply to the Service Department for the software function activation code
based on the user's need. To apply for acctivation code:
1.
Record the serial number of the ventilator whose configurations are to be activaed.
2.
Record the machine ID and the current configuration of the ventilator. Select [Main
Menu] hot key, [System Information >>], and then [Configuration Information >>]
to access the [Configuration Information] menu:
3.
Record the configuration the user wants to activate.
4.
Return the recorded information to the Service Department to apply for the
corresponding activation code.
4-16
4.2.2.2 How to Activate Software Function
NOTE

Before activation, check and record the user’s existing paid configurations and also
the paid configurations to be added.

After entering the activation code, make sure that the entered activation code is
same to that provided by the factory.
To activate software functions:
1.
Accessing the [Activate Functions] menu: select [Main Menu] hot key, then
[Maintenance >>, then [Factory Maintenance >>], and then [Activate Functions], as
shown below:
2.
If you select to activate the function by [Activation Code], enter the required activation
code in the [Activate Functions] menu. If you select to activate the function by [USB
Memory], plug the USB device with required activation code onto the ventilator.
3.
Select [Activate]. If the entered activation code is correct, a prompt message is
displayed as shown below:
4.
Click [Ok] to restart the ventilator so as to activate the new configuration.
4-17
NOTE

Powering off the ventilator before the message [Function activation completed!
Please restart the ventilator to activate the function.] is prompted can damage the
BIOS program on the main control board.

After activation success is prompted, restart the ventilator to activate both the
existing and new paid configurations after software upgrade.
4.2.2.3 Commonly-encountered Problems and Recommended Actions
Failure description
Possible cause
Recommended solution
After activation, restart the
ventilator. The main control
board buzzes long, resulting
in restart failure.
During
activation,
the
ventilator is powered off or
turned off before activation
success is prompted, which
damages the BIOS program
on the main control board.
Return the main control board to
factory for repair.
Invalid activation code is
prompted.
The activation code is entered
improperly or the activation
code itself is wrong.
1. Check that the activation code
entered is same to that provided
by the factory.
2. If the activation code is
entered correctly and invalid
activation code is still prompted,
send the machine ID, existing
configurations
and
the
configurations to be added to the
factory for confirmation.
After system activation, the
activated functions are not
consistent with the user’s
configurations.
The factory activation code is
wrong. Or, the existing
configurations
and
the
configurations to be added
which are provided for the
factory are not complete.
Check
the
existing
configurations
and
the
configurations to be added again.
Request the factory to generate
activation code again.
Activation code file not
found is prompt for USB
activation.
The activation code file is
damaged or does not exist in
the USB device.
Re-apply for an activation code.
Activation code file error is
prompt for USB activation.
The activation code file is of
wrong information.
Re-apply for an activation code.
4-18
4.3 System Test
Before the ventilator at the client end is maintained, some routine tests are required to check
if the current status of the ventilator is normal. The following table lists the routine tests.
SN
1
Test item
System Check
Function description
1. Check if the air flow sensor, O2 flow sensor,
expitatory flow sensor, pressure sensor, expiration
valve, safety valve, and O2 concentration sensor are in
good condition.
2. Check the leakage, compliance, and circuit resistance
of the system.
2
Check the
mechanical
ventilation
mode
3
Check the
sensors' zero
point
4
Check the
accuracy of
flow sensors
1. Check if mechanical ventilation is provided normally
and if an alarm occurs.
5
After each
service or at
the time of
return visit
2. Check if the preset values of pressure and TV are
same to the measured values.
After each
service or at
the time of
return visit
Check if the zero points of all the flow sensors and
pressure sensors inside the ventilator are within normal
range so as to determine whether to zero the sensors or
replace the monitoring board.
After each
service or at
the time of
return visit
Check if the measurements made by the flow sensors
inside the ventilator are consistent with each other.
Check if the measurement made by any flow sensor
inside the ventilator is accurate.
Check the effectiveness of calibration result.
Check the
correctness of
pressure
sensors
Test interval
1. Check if the measured values of the internal pressure
sensors are consistent with each other.
2. Check if the measured value of each pressure sensor
is correct.
3. Check the effectiveness of calibration result.
4-19
After each
service or at
the time of
return visit
After each
service or at
the time of
return visit
4.3.1 System Check
NOTE

Before maintaining the ventilator, run system check first to test the key parts, like
sensors and valves, and circuit leakage or occlusion for a basic understanding of
the current status of the ventilator.
System check includes tests on the working status of air inspiration valve, O2 inspiration
valve, air flow sensor, O2 flow sensor, expiratory flow sensor, pressure sensor, expiration
valve, safety valve, and O2 concentration sensor, as well as the leakage and resistance of the
ventilator. The test items are listed below:
SN
Calibration item
Function description
Requirements to pass the tests
1
O2 flow sensor test
Tests the O2 inspiration
valve and O2 flow sensor
The difference in the maximum flow
to open the inspiration valve between
the O2 flow sensor and O2 inspiration
valve should be less than max (2
L/min, ±20%).
2
Air flow sensor test
Tests the air inspiration
valve and air flow sensor
The difference in the maximum flow
to open the inspiration valve between
the air flow sensor and air inspiration
valve should be less than max (2
L/min, ±20%).
3
Expiratory flow sensor
test
Tests the expiratory flow
sensor
The difference in the maximum flow
to open the inspiration valve between
the expiratory flow sensor and
inspiration valve should be less than
max (2 L/min, ±20%).
4
Pressure sensor test
Tests the PEEP pressure
sensor, inspiratory
pressure sensor and
expiratory pressure
sensor
When the expiration valve is blocked
under different pressures, the change
of the readings on the PEEP pressure
sensor, inspiratory pressure sensor
and expiratory pressure sensor are
consistent with that of the open valve
pressure. The values measured by the
inspiratory pressure sensor and
expiratory pressure sensor shall not
deviate by 10cmH2O.
5
Expiration valve test
Tests the expiration
valve
The same with the above one.
4-20
SN
Calibration item
Function description
Requirements to pass the tests
6
Safety valve test
Tests if the safety valve
can be opened and
closed as required
The safety valve can be opened and
closed as controlled by the
monitoring board and auxiliary
control board.
7
O2 sensor test
Tests the O2 sensor
In 100% air environment, the
measured value is between 18% and
12%; in 100% O2 environment, the
measured value is between 90% and
100%.
8
Leakage (ml/min)
Calculates the pipe
leakage
When the airway pressure is between
50 and 60 cm H2O, the leakage is
between 0 and 10 L/min.
9
Compliance
(ml/cmH2O)
Calculates the
compliance of pipes
The measured compliance value is
between 0 and 20 ml/cmH2O.
10
Circuit resistance
(cmH2O/L/s)
Calculates the pipe
resistance; thus
reflecting if the pipes are
blocked
When the flow is 60 L/min, the pipe
resistance is between 0 and 20 cm
H2O/L/s.
For detailed information, please refer to 3.4System Test .
NOTE

If the system check fails, you need to troubleshoot the failed test items (refer to
5Troubleshooting) and then run another system check until the system passes all
the tests.
4.3.2 Check the Mechanical Ventilation Mode
NOTE

The main function of the ventilator is to provide breathing support--mechanical
ventilation which complies with the doctor’s settings to the patient. The tests in this
section are performed aiming to ensure that the machine is able to provide normal
mechanical ventilation.

The tests can help to judge if the ventilator operates normally.
The tests are mainly checking the consistence between measurements made by the ventilator
and the set value, the working status of the ventilator, and the alarms so as to determine if this
ventilator operates normally.
4-21
4.3.2.1 Check Volume Control Ventilation (VCV)
This test is mainly checking if the ventilator can provide volume control ventilation,
including check on the control, feedback, and measurement of tidal volume, as well as correct
ventilation alarms.
To check VCV:
1.
Make sure that the supply pressure is normal and that the tubes in the breathing circuit
are correctly connected as required for mechanical ventilation. Connect a 2 L bag, which
is used as the test lung, to the Y piece in the patient circuit.
2.
Select V-A/C as the ventilation mode.
3.
Set the following combinations of TV (tidal volume) and Rate respectively: (150 ml, 15
BPM), (300 ml, 12 BPM), (600 ml, 15 BPM), and (900 ml, 15 BPM). Set others to the
defaults. Record the TVi reading in each setting stablized status.
4.
Judge if the above measured data meet the following conditions:

TV control and measurement are normal: the difference between the TVi reading
and set value does not exceed 10% or 10 ml, whichever is greater.

No other ventilation failure occurs: the pressure and flow waveforms are displayed
normally and no technical alarms occur.
If the above test requirements are not met, perform subsequent checks and do the test again.
NOTE

If any errors are detected during volume control ventilation test, perform
troubleshooting as per 5Troubleshooting, and do the test again until the system is
normal.
4.3.2.2 Check Pressure Control Ventilation (PCV)
This test is mainly checking if the ventilator can provide pressure control ventilation,
including check on the control, feedback, and measurement of pressure, as well as correct
ventilation alarms.
To check PCV:
1.
Make sure that the supply pressure is normal and that the tubes in the breathing circuit
are correctly connected as required for mechanical ventilation. Connect a 2 L bag, which
is used as the test lung, to the Y piece in the patient circuit.
2.
Select P-A/C as the ventilation mode.
3.
Set the following combinations of Pinsp, Rate and PEEP respectively: (10 cmH2O, 15
BPM, OFF), (15 cmH2O, 12 BPM, 5 cmH2O), (20 cmH2O, 10 BPM, 8 cmH2O). Set
others to the defaults. Record the displayed Peak and PEEP values in each setting
stabilized status.
4-22
4.
Judge if the above measured data meet the following conditions:

Pressure control and measurement are normal: the difference between the displayed
Peak value and the set Pinsp value does not exceed 2 cm H2O or 10% of the set
value, whichever is greater; the difference between the displayed PEEP value and
the set value does not exceed 2 cm H2O or 10% of the set value, whichever is
greater.

No other ventilation failure occurs: the pressure and flow waveforms are displayed
normally and no technical alarms occur.
If the above test requirements are not met, perform subsequent checks and do the test again.
NOTE

If any errors are detected during pressure control ventilation test, perform
troubleshooting as per 5Troubleshooting, and do the test again until the system is
normal.
4.3.3 Check the Sensor Zero Point
NOTE

If the zero point of the pressure sensor has an error, in ventilation status when
PEEP is set to 0, the baseline of the pressure waveform is not at the zero point.

If the zero point of the inspiratory/expiratory flow sensor has an error, in
ventilation status, the baseline of the flow waveform is not at the zero point.

If the zero point A/D value of any sensor is outside of the normal range, and if it
can not be corrected, the monitor board must be replaced.

The zero point A/D value of the PEEP pressure sensor and expiratory pressure
sensor should fall within the normal range of 920 to 2000.

The zero point A/D value of the inspiratory pressure sensor should fall within the
normal range of 920 to 2000.

The zero point A/D value of the expiratory flow sensor should fall within the
normal range of 100 to 1300.

The zero point A/D value of the air/O2 flow sensor should fall within the normal
range of -0.5 to 1 L/min.
The test is to check if the zero points of all the flow sensors and pressure sensors inside the
ventilator are within normal range so as to determine whether to zero the sensors or replace
the monitoring board.
4-23
To check the sensor zero point:
1.
Turn off all fresh gases and position the Y piece connector in the patient circuit to the
air.
2.
Make sure that the system is Standby. Select [Main Menu] → [Maintain] → [Service]
→ [A/D Channel]. Select [VCM] and [VPM] respectively. Check the actual values of
flow and pressure sensors.
3.
Make sure that the actual measured value of each sensor is close to “0” (zero). If the
measured value of any sensor is larger than 0.5, you need to calibrate the sensor. Record
the zero point A/D value of each sensor and judge if the zero point falls within the
normal range. If not, calibrate the corresponding sensor. For details about calibration,
please refer to 4.4.5 Pressure and Flow Zeroing.
4.3.4 Check the Flow Sensor Accuracy
NOTE

If a great deviation of TV measured value occurs, test the measurement accuracy
of expiratory flow sensors so as to determine whether to perform flow calibration
again. This test can also validate the effectiveness of flow calibration.
This test is mainly checking the consistency of measurement among the internal flow sensors
and the accuracy of measurement of each flow sensor, as well as validating the effectiveness
of flow calibration.
To check the measurement accuracy of flow sensors:
1. Connect the inspiration/expiration connectors with breathing tubes, as shown below:
Exp. port
Gas flow
direction
Insp. port
Hose
4-24
2.
In standby mode, select [Main Menu] → [Maintain] → [Service] → [Diagnosis] to
access the [Valve Test] menu.
3.
Increase the value of air inspiration valve, causing the measured open valve flow to fall
within the following ranges respectively: (3 ± 0.5) L/min, (10 ± 1) L/min, (20 ± 1)
L/min, (30 ± 2) L/min, (60 ± 3) L/min. Record the measured flow values of the air
inspiratory flow sensor and expiratory sensor in each setting stabilized status. Make sure
that the deviation between the measured data of the air expiratory flow sensor and
inspiratory flow sensor and that of the calibration device must not exceed max (0.5 lpm,
±5%); and that the deviation between the measured value of inspiration valve and that of
the air flow sensor must not exceed max (2 lpm, ±20%).
4.
Check the O2 inspiration valve, O2 flow sensor, and expiratory flow sensor as instructed
above, and make sure that the deviations fulfills the accuracy requirements.
5.
If any of the sensors fails the test, perform flow calibration again as per 4.4.2 Flow
Calibration (Factory). If calibration fails, replace the corresponding sensor.
4.3.5 Check the Pressure Sensor Accuracy
NOTE

If a great deviation of pressure measured value occurs, test the measurement
correctness of pressure sensors so as to determine whether to perform pressure
calibration again. This test can also validate the effectiveness of pressure
calibration.
This test is mainly checking the consistency of measurement among the internal pressure
sensors and the correctness of measurement of each pressure sensor, as well as validating the
effectiveness of pressure calibration.
4-25
To check the measurement correctness of pressure sensors:
1. Make sure that the pressure sampling line and calibration devices (or other pressure
measurement devices) are connected in parallel, as shown below:
Inspiratory port
Expiratory port
The other end connects to
the calibration connector
of the ventilator.
Calibration device
The other end connects
to the AC power supply.
Positive end of pressure
sensor
2.
In standby mode, select [Main Menu] → [Maintain] → [Service] → [Diagnosis] to
access the [Valve Test] menu.
3.
Set the open valve flow of inspiration valve to 10 L/min.
4.
Increase the pressure of expiration valve, causing the measured value of the close valve
pressure of inspiration valve to fall within the following ranges respectively: (5 ± 1) cm
H2O, (20 ± 1) cm H2O, (50 ± 1) cm H2O, (70 ± 2) cm H2O, (90 ± 2) cm H2O. Record
the measured pressure values of the calibration devices, expiratory pressure sensor and
inspiratory pressure sensor to which each setting corresponds respectively.
5.
Make sure that the deviation between the measured data of the expiratory pressure
sensor and inspiratory pressure sensor and that of the calibration devices must not
exceed max (1cmH2O, ±2%); and that the deviation between the measured value of the
expiration valve and that of the calibration device must not exceed max (5cmH2O,
±20%). If not, perform calibration again as per 4.4.6 Pressure Calibration (Factory)
and 4.4.7Expiration Valve Calibration (Factory). If the ventilator fails the test after
calibration, replace the corresponding sensor.
4-26
6.
On condition that the above requirements are satisfied, make sure that the above groups
of measured data shall satisfy this: the deviation between the measured value of the
expiration valve (or inspiratory/expiratory pressure sensors) and that of the calibration
device shall not exceed max (5cmH2O, ±20%). Otherwise, calibrate the sensor again
as per 4.4.7 Expiration Valve Calibration (Factory). If the ventilator fails the test after
calibration, replace the expiration valve.
4.4 System Calibration
NOTE

Perform the corresponding calibration if any of the system tests described in 4.3
System Test is failed.

After replacing the monitor board, valve assemblies, or sensors, perform the
corresponding calibration as described in this chapter.
The ventilator provides the function of monitoring flow, pressure, volume, and inspiratory
oxygen concentration etc. When these measured values have great deviations, it is very likely
that measurement offset occurs to the relevant measurement parts. In this case, you need to
perform calibration again. After equipment service, such as replacing the monitor board,
valve assemblies, or sensors, you need to calibrate the flow or pressure sensors.
The following table lists the possible calibration items and calibration time:
SN
Calibration
item
Function description
Calibration time
1
Flow Calibration
(User)
Calibrate the expiratory flow
sensor, O2 inspiration valve,
and air inspiration valve.
1. The TVi and TVe measurement
deviation is great after the flow sensor
have been used for a long time.
2. The flow sensor is replaced.
2
Flow calibration
(factory)
Calibrate the expiratory flow
sensor, O2 inspiration valve,
and air inspiration valve.
Apply pipeline air for
factory calibration of the air
limb. Otherwise calibration
may be failed because of the
condenser.
1. The deviation between the inspiratory
flow sensor and the expiratory flow sensor
exceeds 5% of the measured value or 1
L/min, whichever is greater.
2. The deviation between the inspiratory
flow sensor and the inspiration valve
exceeds 20% of the measured value or 2
L/min, whichever is greater.
3. The inspiration valve, flow sensor,
monitor board, or inspiratory or expiratory
interface board is replaced.
4-27
SN
Calibration
item
Function description
Calibration time
3
Oxygen
concentration
calibration
(user)
Calibrate the accuracy of O2
sensor at 21% and 100%
oxygen.
1. The measured value of the O2 sensor has
a great deviation. The deviationexceeds
3% both in Air and pure O2.
Oxygen
concentration
calibration
(factory)
Calibrate the accuracy of O2
sensor at 21% and 100%
oxygen.
4
2. The O2 sensor is replaced.
1. The measured value of the O2 sensor has
a great deviation. The deviationexceeds
3% both in Air and pure O2.
2. The O2 sensor is replaced.
3. The monitor board is replaced.
5
Pressure and
flow calibration
(factory)
Calibrate the deviation from
zero points of the pressure
sensor and flow sensor. (You
can check the value of the
zero point on the factory
calibration menu).
Pressure or flow waveforms deviates from
the baseline.
6
Pressure and
flow calibration
(user)
Calibrate the deviation from
zero points of the pressure
sensor and flow sensor.
Pressure or flow waveforms deviates from
the baseline.
7
Pressure
calibration
(factory)
Calibrate the
inspiratory/expiratory
pressure sensors, and PEEP
valve pressure sensor.
1. The deviation between the measured
value of the ventilator’s pressure sensor
and that of the standard pressure gauge
exceeds more than 2% of the reading or
1cmH2O, whichever is greater.
2. The expiration valve or pressure sensor
is replaced.
3. The monitor board is replaced.
8
Expiration valve
calibration
(factory)
Calibrate the expiration
valve based on completed
pressure calibration.
1. The deviation between the control value
of the ventilator’s expiration valve and the
measured value of the standard pressure
gauge (or ventilator’s
inspiratory/expiratory pressure sensor)
exceeds more than 20% of the reading or
5cmH2O, whichever is greater.
2. Replace the expiration valve or pressure
sensor. Calibrate the expiration valve after
performing pressure calibration.
3. Replace the monitor board. Calibrate the
expiration valve after performing pressure
calibration.
4-28
Select [Main Menu] → [Calibrate] to access the [Calibrate] menu, where you can perform
flow calibration (user), pressure and flow zeroing (user) and oxygen concentration calibration
(user).
Select [Main Menu] → [Maintain] → [Service], and input the required service password to
enter the [Service] menu. Select [Calibration] to perform flow calibration (factory), oxygen
concentration calibration (factory), pressure and flow calibration (factory), pressure
calibration (factory) and expiration valve calibration (factory).
4.4.1 Flow Calibration (User)
NOTE

The measurements performed by the flow sensors may be affected by the
environment where the sensors are used. After the sensors have been used for a
long time, great deviations may occur to the measurement results and tidal volume
control as well. This problem can be fixed through flow sensor calibration.

Calibrate flow sensors again after replacing sensors.

Before calibration, perform leak test of the system first and make sure that the test
is passed and there is no leakage in the hoses.

During calibration, make sure that both the air and O2 supplies are connected with
sufficient gas supply. Failure to do so may lead to calibration failure.

It is recommended not to connect the humidifier to the ventilator before the
calibration.
This calibration is intended to calibrate the expiratory flow sensor, air inspiratory valve, and
O2 inspiratory valve through the air inspiratory flow sensor and O2 inspiratory flow sensor of
the ventilator.
After the flow sensors have been used for several months, for example, three months after
calibration, great deviations (more than 10% compared with the setting value) may occur to
tidal volume measurement due to sensor aging or environmental factors. Or, the user replaces
flow sensors. In this case, you need to re-calibrate flow sensors. You can perform user flow
calibration as described below:
1.
Select [Main Menu] → [Calibrate] to access the [Calibrate] menu. Then select
[Flow];
2.
Connect the hoses and insert the Y piece into the leak test plug to close the breathing
circuit;
3.
Press the [Calibrate] button to start user flow calibration.
4-29
NOTE

If measurement deviations are not corrected after multiple flow sensor
calibrations, the user is recommended to replace the flow sensor and then perform
calibration. If the problem persists, factory maintenance is necessary. After the
problem is fixed, perform calibration and system test.
4.4.2 Flow Calibration (Factory)
NOTE

Factory flow calibration is necessary in case of replacing the monitor board,
inspiratory or expiratory interface board, flow sensor, or valve assemblies.

When a great deviation is detected between the measured value of the expiratory
flow sensor, inspiratory flow sensor, and inspiration valve and that of the
calibration device, you need to perform factory flow calibration.

When the altitude of the ventilator changes, change the altitude setting value in the
factory setup menu and then perform flow calibration (factory).

It is recommended not to connect the humidifier to the ventilator before the
calibration.
This calibration is intended to calibrate the expiratory flow sensor, air inspiratory sensor, and
O2 inspiratory sensor through the air inspiratory flow sensor and O2 inspiratory flow sensor
of the ventilator.
4.4.2.1 Calibration Procedures
NOTE

Before calibration, perform leak test of the system first and make sure that the test
is passed and there is no leakage in the hoses.

Before calibration, make sure that no sensor, valve, or limb related technical
alarms occurred.

During calibration, make sure that both the air and O2 supplies are connected with
sufficient gas supply. Failure to do so may lead to calibration failure.

Do not move or press the tubes during calibration.
4-30
To perform factory flow calibration:
1.
Select [Main Menu] → [Maintain] → [Service], and enter the required service
password to access the [Service] menu. Select [Calibration] and then [Flow];
2.
Connect sufficient air and O2 supplies (pipeline Air and O2 supplies are required for
factory calibration);
3.
Connect the breathing hoses and insert the Y piece into the leak test plug;
4.
Press the [Calibrate] button to start factory flow calibration.
NOTE

After flow calibration, check the measurement accuracy of the flow sensors as per
4.3.4Check the Flow Sensor Accuracy.

In case of calibration failure, first fix the problem and then perform calibration
again.
4.4.2.2 Commonly-encountered Problems and Recommended Actions
Failure
description
Possible cause
Recommended solution
After
[Calibrate] is
selected,
no
ventilation
sound is heard.
Very soon, the
prompt message
of
calibration
failure
is
displayed.
Failure message numbered [02] is
displayed, indicating that the air supply
pressure is not adequate.
Failure message numbered [03] is
displayed, indicating that the O2 supply
pressure is not adequate.
1. Connect or replace the gas supplies
to make sure that the gas pressure is
between 350 and 450 kPa.
Failure message numbered [30] is
displayed, indicating calibration failure
caused by air inspiratory limb failure.
Failure message numbered [29] is
displayed, indicating calibration failure
caused by O2 inspiratory limb failure.
1. Check if there is inspiration valve
failure as per 5.5.3.4Inspiratory valve
status error. If so, replace the
inspiration valve.
2. If the problem persists, replace the
monitor board.
Failure message numbered [09] is
displayed, indicating zero point error.
1. Check if there is inspiration valve
failure as per 5.5.3.4Inspiratory valve
status error. If so, replace the
inspiration valve.
2. If the problem persists, replace the
monitor board.
4-31
Failure
description
Possible cause
Recommended solution
Soon
after
[Calibrate] is
selected
and
ventilation
sound is heard,
the
prompt
message
of
calibration
failure
is
displayed.
Failure message numbered [04] is
displayed, indicating that the open
valve flow of the inspiration valve fails
to reach 105 L/min.
1. Check the gas supplies to make
sure that the drive gas pressure is
between 350 and 450 kPa.
2. Check if there is inspiration valve
failure as per 5.5.3.4Inspiratory valve
status error. If so, replace the
inspiration valve.
3. If the problem persists, replace the
monitor board.
Failure message numbered [05] is
displayed, indicating that the maximum
value cannot be found, i.e., when the
inspiration valve is opened with a DA
value within 1000 - 4000, no flow of 95
L/min is detected.
Failure message numbered [06] is
displayed, indicating that the minimum
value cannot be found, i.e., when the
inspiration valve is opened with a DA
value within 200 - 2000, no flow of 1
L/min is detected.
Replace the inspiration valve.
Failure message numbered [13] is
displayed, indicating that the air
inspiration valve accuracy is low, ie.,
the average D/A value per L/min is less
than 5.
Failure message numbered [14] is
displayed, indicating that the O2
inspiration valve accuracy is low, i.e.,
the average D/A value per L/min is less
than 5.
Replace the inspiration valve.
Failure message numbered [16] is
displayed, indicating that the expiratory
flow sensor accuracy is low, i.e., the
average A/D value per L/min is less
than 5.
Replace the expiratory flow sensor.
4-32
Failure
description
Possible cause
Recommended solution
After a while of
calibration, the
prompt message
of
calibration
failure
is
displayed.
Failure message numbered [10] is
displayed,
indicating
VPM
communication error, i.e., no VPM
response is received within 0.5 s.
1. Restart the system and perform
calibration again.
2. If the problem persists, replace the
monitor board.
Failure message numbered [07] is
displayed, indicating a table error that
more
than
two
non-monotonic
calibration points are detected in the
calibration table.
1. Replace the insiration valve and
expiratory flow sensor, and perform
calibration again.
2. If calibration fails again, replace
the monitor board.
Failure message numbered [11] is
displayed, indicating VPM table error,
which means more than two
non-monotonic calibration points are
detected in the VPM calibration table.
1. Replace the insiration valve and
expiratory flow sensor, and perform
calibration again.
2. If calibration fails again, replace
the monitor board.
4.4.3 O2% Calibration (User)
NOTE

Calibrate the O2 sensor again when a great deviation of O2 concentration
monitored value occurs or when the O2 sensor or monitor board is replaced.

Before calibration, observe if FiO2 displays numerics on the measure screen. If not,
confirm that the O2 measure switch is turned on, check the O2 sensor connection
line, or replace the O2 cell until measure numerics are displayed.
Perform O2% calibration again when the measured value of the O2 sensor has a great
deviation which exceeds 3% both in Air and pure O2, or the O2 sensor or monitoring board is
replaced.
To perform O2% calibration:
1.
Select [Main Menu] → [Calibrate] to access the [Calibrate] menu. Then select
[O2%];
2.
Make sure that Air and O2 supplies are connected.
3.
Press the [Calibrate] button to start user O2% calibration.
4-33
4.4.4 O2 Calibration (Factory)
NOTE

Calibrate the O2% again when a great deviation of O2 concentration monitored
value occurs or when the O2 sensor or monitoring board is replaced.

Before calibration, observe if the O2 sensor displays numerics on the measure
screen. If not, confirm that the O2 measure switch is turned on, check the O2 sensor
connection line, or replace the O2 cell until measure numerics are displayed.
Perform O2% calibration again when the measured value of the O2 sensor has a great
deviation which exceeds 3% both in Air and pure O2, or the O2 sensor or monitoring board is
replaced.
4.4.4.1 Calibration Procedures
To perform O2% calibration:
1.
Select [Main Menu] → [Maintain] → [Service], and enter the required service
password to access the [Service] menu. Select [Calibration] and then [O2];
2.
Make sure that Air and O2 supplies are connected.
3.
Press the [Calibrate] button to start factory O2% calibration. Perform O2% calibration
first in air, and then in pure O2.
4-34
4.4.4.2 Commonly-encountered Problems and Recommended Actions
Failure
description
Possible cause
Recommended solution
Soon after
the
[Calibrate]
button
is
selected, the
prompt
message of
calibration
failure
is
displayed.
Failure message numbered [02] is displayed, indicating
that the air supply pressure is not adequate.
Connect or replace the air
supply to make sure that the
gas supply pressure is in
normal range.
Failure message numbered [03] is displayed, indicating
that the O2 supply pressure is not adequate.
Connect or replace the O2
supply to make sure that the
gas supply pressure is in
normal range.
Failure message numbered [31] is displayed, indicating
falloff of O2 sensor during O2% calibration.
Check the O2 sensor
connection and make sure it
is correctly connected. Then
perform calibration again.
After
the
calibration
lasts
for
about
3
minutes, the
prompt
message of
calibration
failure
is
displayed.
Failure message numbered [20] is displayed, indicating
that O2 calibration 21% sampling value exceeds the
upper limit, i.e., the AD value is greater than 850.
Failure message numbered [21] is displayed, indicating
that O2 calibration 21% sampling value exceeds the
lower limit, i.e., the AD value is less than 100.
Failure message numbered [22] is displayed, indicating
that O2 calibration 100% sampling value exceeds the
upper limit, i.e., the AD value is greater than 2300.
Failure message numbered [23] is displayed, indicating
that O2 calibration 100% sampling value exceeds the
lower limit, i.e., the AD value is less than 900.
Replace the O2 cell.
Failure message numbered [10] is displayed, indicating
VPM communication error, i.e., no VPM response is
received within 10 s.
1. Restart the system and
perform calibration again.
2. If the problem persists,
replace the monitoring board.
Failure message numbered [36] is displayed, indicating Replace the O2 cell.
that the resolution ratio of O2 cell is low. That’s to say,
the calibration result of O2 cell, 100% AD value
subtracts 21% AD value of O2 cell, is less than or
equal to 79.
Failure message numbered [37] is displayed, indicating
that the resolution ratio of VPM O2 cell is low. That’s
to say, the calibration result of VPM O2 cell, 100%
AD value subtracts 21% AD value of O2 cell, is less
than or equal to 79.
4-35
Replace the O2 cell.
4.4.5 Pressure and Flow Zeroing
During the operation of the ventilator, pressure and flow are zeroed automatically at a
specific interval. You can also zero pressure and flow manually in the factory maintenance
menu. Manual zeroing can eliminate the measurement deviations caused by zero offset
immediately.
4.4.5.1 Zeroing Procedures
1.
Select [Main Menu] → [Maintain] → [Service], and enter thee required service
password to enter the [Service] menu. Select [Calibration] and then [Zero].
2.
Disconnect the ventilator from both air and O2 supplies.
3.
Disconnect the breathing tubes from the patient.
4.
Select [Paw and Flow Zero Cal.] to start manual zeroing.
5.
If pressure and flow zeroing is passed, the message [Zeroing Completed!] is displayed.
If pressure and flow zeroing is failed, the message [Zeroing Failure! Please try again.]
is displayed.
NOTE

In case of zeroing failure, fix the problem first and then perform flow calibration.
4.4.5.2 Commonly-encountered Problems and Recommended Actions
Failure description
Possible cause
Recommended solution
Failure
message
numbered [21] or
[22] is displayed.
The voltage of the three-way
valve
switch
exceeds
the
reasonable range. [21] indicates
error in open status and [22]
indicates error in closed status.
Replace the three-way valve.
Failure
message
numbered [01] is
displayed.
The sampling value of PEEP
pressure sensor fluctuates greatly
after the three-way valve is
opened.
Failure
message
numbered [02] is
displayed.
The sampling value of expiratory
pressure sensor fluctuates greatly
after the three-way valve is
opened.
Disconnect the gas supply and expel
all the gas from the ventilator. Make
sure that the inspiratory and
expiratory ports are exposed to the
air and that no pressure is generated
in flow sensors and pressure sensors.
Perform calibration again.
4-36
Failure description
Possible cause
Recommended solution
Failure
message
numbered [03] is
displayed.
The sampling value of expiratory
flow sensor fluctuates greatly
after the three-way valve is
opened.
Disconnect the gas supply and expel
all the gas from the ventilator. Make
sure that the inspiratory and
expiratory ports are exposed to the
air and that no flow is generated in
flow sensors and pressure sensors.
Perform calibration again.
Failure
message
numbered [04] is
displayed.
The zero point of PEEP pressure
sensor is too high.
Failure
message
numbered [05] is
displayed.
The zero point of PEEP pressure
sensor is too low.
Failure
message
numbered [08] is
displayed.
The zero point of expiratory
pressure sensor is too high.
Failure
message
numbered [09] is
displayed.
The zero point of expiratory
pressure sensor is too law.
1. Unplug the sensor sampling line
to eliminate the effects caused by
sampling
line
occlusion
or
three-way valve. Perform zeroing
again.
2. Replace corresponding sensors or
valve assemblies, and then perform
zeroing again.
3. If zero point error still persists,
the monitoring board is faulty.
Replace the monitoring board.
Failure
message
numbered [12] is
displayed.
The zero point of expiratory flow
sensor is too high.
Failure
message
numbered [13] is
displayed.
The zero point of expiratory flow
sensor is too low.
Failure
message
numbered [20] is
displayed.
The zeroing duration exceeds the
set time limit.
1. Restart the system and perform
calibration again.
2. If the problem persists, replace
the monitoring board.
4.4.6 Pressure Calibration (Factory)
NOTE

Factory pressure calibration is necessary in case of replacing the monitoring board,
pressure sensor, or valve assemblies.

When a great deviation is detected between the measured value of the built-in
pressure sensor and that of the standard pressure measurement device, you need to
perform factory pressure calibration.

It is recommended not to connect the humidifier to the ventilator before the
calibration.
4-37
This calibration is intended to calibrate the inspiratory/expiratory pressure sensors, and PEEP
pressure sensor with the ventilator calibration device.
4.4.6.1 Calibration Procedures
NOTE

Before pressure calibration, make sure that the tubes are not leaky whenconnected.

Do not move or press the tubes during calibration.
1.
Select [Main Menu] → [Maintain] → [Service], and enter the required service
password to access the [Service] menu. Select [Calibration] and then [Pressure].
2.
Connect sufficient gas supply.
3.
Remove the expiration valve core. Replace the expiratory flow sensor with expiratory
flow sensor clamp.
Expiration valve core
Clamo VT50-J08(end
face sealed)
Expiration flow sensor
4.
Make sure that the pressure sampling line and calibration devices (or other pressure
measurement devices) are connected in parallel, as described in 4.3.5Check the
Pressure Sensor Accuracy.
5.
Connect the calibration communication connector of the calibration device to that of the
ventilator with the special communication cable.
4-38
6.
Zero the ventilator calibration device manually: Start the calibration device to enter the
startup screen followed by sensor heating screen (waiting for approximately 5 minutes
as required by the prompt message) and then the zeroing screen. Press the [ZERO] key
on the panel. After the new screen pops up, press the [OK] key on the panel to complete
zeroing.
7.
Press [Calibrate] to start factory pressure calibration.
8.
After a successful calibration, re-place the expiration valve core and re-place the
expiratory flow sensor just replaced.
NOTE

After pressure calibration, check the measurement correctness of the pressure
sensors as per 4.3.5Check the Pressure Sensor Accuracy.

In case of calibration failure, first fix the problem and then perform calibration
again.
4.4.6.2 Commonly-encountered Problems and Recommended Actions
Failure
description
Possible cause
Recommended solution
After [Calibrate]
is selected, no
ventilation sound
is heard. Very
soon, the prompt
message
of
calibration failure
is displayed.
Failure message numbered [01] is
displayed, indicating that the
supply pressure is not adequate.
Connect or replace the gas supplies to
make sure that the drive gas pressure is
between 350 and 450 kPa.
4-39
Failure
description
Possible cause
Recommended solution
Soon
after
[Calibrate]
is
selected and the
ventilation sound
is
heard,
the
prompt message
of
calibration
failure
is
displayed.
Failure message numbered [06] is
displayed, indicating that the
minimum value cannot be found,
i.e., when the expiration valve is
opened with a D/A value within
1400-3000, no pressure of 1.5
cmH2O is detected.
Possible cause: tube occlusion or
expiration valve failure.
1. Check the tube connection, and in
case of incorrect connection, fix the
problem and perform calibration again.
2. Check if there is expiration valve
failure as per 5.5.3.5Expiratory valve
status error. If so, replace the expiration
valve.
3. If the problem persists, replace the
monitoring board.
Failure message numbered [05] is
displayed, indicating that the
maximum value cannot be found,
i.e., when the expiration valve is
closed with a D/A value within
2000-3800, no pressure of 90
cmH2O is detected.
Possible cause: safety valve or
expiration valve failure.
1. Check if there is expiration valve
failure as per 5.5.3.5Expiratory valve
status error. If so, replace the expiration
valve.
2. Check if there is safety valve failure
as per 5.5.3.6Safety valve status error. If
so, replace the safety valve.
3. If the problem persists, replace the
monitoring board.
Failure message numbered [17] is
displayed, indicating that the
inspiratory
pressure
sensor
accuracy is low, i.e., the average
A/D value per cmH2O is less than
10.
Replace the inspiratory pressure sensor.
Failure message numbered [18] is
displayed, indicating that the
expiratory
pressure
sensor
accuracy is low, i.e., the average
A/D value per cmH2O is less than
10.
Replace the expiratory pressure sensor.
Failure message numbered [15] is
displayed, indicating that the
expiration valve accuracy is low,
i.e., the average D/A value per
cmH2O is less than 2.5.
Replace the expiration valve.
4-40
Failure
description
Possible cause
Recommended solution
After a while of
calibration,
the
prompt message
of
calibration
failure
is
displayed.
Failure message numbered [12] is
displayed, indicating a VTplus
communication error that no data
is received from the calibration
device in 0.5 s.
1. Check the communication connection
between the ventilator and calibration
device, or reconnect the cables, to make
sure that the communication cables are
correctly connected. If the problem
persists, replace the communication
cable.
2. Check the configuration of the
calibration
device,
and
perform
calibration again if needed.
3. Restart the ventilator and calibration
device, and perform calibration again.
Failure message numbered [10] is
displayed, indicating a VPM
communication error that no VPM
response is received in 1 s.
1. Restart the system and perform
calibration again.
2. If the problem persists, replace the
monitoring board.
Failure message numbered [07] is
displayed, indicating a table error
that more than two non-monotonic
calibration points are detected in
the calibration table.
1. Replace the expiration valve,
inspiratory
pressure
sensor,
and
expiratory pressure sensor, and then
perform calibration again.
2. If calibration fails again, replace the
monitoring board.
Failure message numbered [11] is
displayed, indicating a VPM table
error that more than two
non-monotonic calibration points
are detected in the VPM
calibration table.
1. Replace the expiration valve,
inspiratory
pressure
sensor,
and
expiratory pressure sensor, and then
perform calibration again.
2. If calibration fails again, replace the
monitoring board.
4-41
4.4.7 Expiration Valve Calibration (Factory)
NOTE

Factory pressure calibration is necessary in case of replacing the monitoring board,
pressure sensor, or valve assemblies. Perform expiration valve factory calibration
after factory pressure calibration is completed.

When a great deviation is detected between the control effect of the expiration
valve and the setting value, you need to perform expiration valve factory
calibration.
This calibration is intended to calibrate the expiration valve with the ventilator inside
pressure sensor onto which pressure calibration has been performed as the calibration
reference. Ventilator calibration device is not required.
4.4.7.1 Calibration Procedures
NOTE

Before expiration calibration, make sure that the tubes are not leaky when
connected.

Do not move or press the tubes during calibration.
1.
Select [Main Menu] → [Maintain] → [Service], and enter the required service
password to access the [Service] menu. Select [Calibration] and then [Exp. Valve].
2.
Connect sufficient gas supply.
3
Connect the hoses and insert the Y piece into the leak test plug to close the breathing
circuit
4.
Select [Exp. Pressure Sensor] as the calibration reference.
5.
Press the [Calibrate] button to start expiration valve calibration.
4-42
NOTE

After expiration valve calibration, check the measurement correctness of the
pressure sensors as per 4.3.5Check the Pressure Sensor Accuracy.

In case of calibration failure, first fix the problem and then perform expiration
valve calibration again.
4.4.7.2 Commonly-encountered Problems and Recommended Actions
Failure description
Possible cause
Recommended solution
After [Calibrate] is
selected, no ventilation
sound is heard. Very
soon,
the
prompt
message of calibration
failure is displayed.
Failure message numbered [01]
is displayed, indicating that the
supply
pressure
is
not
adequate.
Connect or replace the gas supplies to
make sure that the drive gas pressure
is between 350 and 450 kPa.
Soon after [Calibrate]
is selected and the
ventilation sound is
heard, the prompt
message of calibration
failure is displayed.
Failure message numbered [34]
is displayed, indicating zeroing
the pressure sensor as reference
is failed.
1. Check if the pressure sensor zero
point
is
normal.
Refer
to
5.5.3.1Sensor zero point error.。
2. Calibrate again after the failure is
eliminated.
Failure message numbered [32]
is displayed, indicating that the
inspiration valve is unable to
open to the specified target
flow, which is 3lpm by default.
If the tube leakage is great, the
target flow is 6lpm.
The
possible
cause
is
inspiration valve failure.
1.Check if the inspiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
inspiration valve.
2.Perform calibration again.
Failure message numbered [09]
is displayed, indicating that the
calibration zero point is wrong.
When the expiration valve is
not closed and the inspiratory
target flow is 3lpm or 6lpm,
the pressure of pressure sensor
as
calibration
reference
exceeds 1cmH2O.
The possible cause is tube
occlusion.
Check the tube connection. In case of
tube occlusion, fix the problem and
perform calibration again.
4-43
Failure description
Possible cause
Recommended solution
Failure message numbered [05]
is displayed, indicating that the
maximum value is not found.
The point of 90cmH2O cannot
be found when closing the
expiration valve across the
range of 2000~3800.
The possible cause is tube
leakage, safety valve failure, or
expiration valve failure.
1.Check the tube connection. In case
of tube occlusion, fix the problem and
perform calibration again.
2.Check if the expiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
expiration valve.
3.Check if the safety valve is faulty.
Refer to 5.5.3.6Safety valve status
error. If yes, replace the safety valve.
4.If the problem persists after the
above actions are taken, replace the
monitor board.
Failure message numbered [06]
is displayed, indicating that the
minimum value is not found.
Pressure value less than
5cmH2O cannot be found
across
the
range
of
1400~3000DA.
The possible cause is tube
leakage or expiration valve
failure.
1.Check the tube connection. In case
of tube occlusion, fix the problem and
perform calibration again.
2.Check if the expiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
expiration valve.
3.If the problem persists after the
above actions are taken, replace the
monitor board.
Failure message numbered [35]
is displayed, indicating that the
pressure is a bit high and the
resolution is not sufficient. The
pressure to which the 2nd point
in the calibration table is
outside the range (>10cmH2).
The
possible
cause
is
expiration valve failure.
1.Check if the expiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
expiration valve.
2.If the problem persists after the
above actions are taken, replace the
monitor board.
Failure message numbered [15]
is displayed, indicating that the
accuracy of expiration valve is
not high enough. Namely, DA
corresponding
to
average
1cmH2O is less than 2.5.
Replace the expiration valve.
4-44
Failure description
Possible cause
Recommended solution
After a while of
calibration, the prompt
message of calibration
failure is displayed.
Failure message numbered [07]
is displayed, indicating table
error that more than two
non-monotonic
calibration
points are detected in the
calibration table.
1.Calibrate again after replacing the
expiration valve.
2.Replace the monitor board if
calibration still fails.
Failure message numbered [35]
is displayed, indicating that the
pressure of the last calibration
point in the calibration table is
a bit low (<80cmH2O).
The possible cause is tube
leakage, safety valve failure, or
expiration valve failure.
1.Check the tube connection. In case
of tube occlusion, fix the problem and
perform calibration again.
2.Check if the expiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
expiration valve.
3.Check if the safety valve is faulty.
Refer to 5.5.3.6Safety valve status
error. If yes, replace the safety valve.
4.If the problem persists after the
above actions are taken, replace the
monitor board.
Failure message numbered [33]
is displayed, indicating that the
pressure is not stable during
calibration. For any calibration
point, after 2s of pressure
stabilization (7s at the most),
the pressure fluctuation at the
first and last 5s exceeds
0.5cmH2O.
The possible cause is tube
leakage, safety valve failure, or
expiration valve failure.
1.Check the tube connection. In case
of tube occlusion, fix the problem and
perform calibration again.
2.Check if the expiration valve is
faulty. Refer to 5.5.3.5Expiratory
valve status error. If yes, replace the
expiration valve.
3.Check if the safety valve is faulty.
Refer to 5.5.3.6Safety valve status
error. If yes, replace the safety valve.
4.If the problem persists after the
above actions are taken, replace the
monitor board.
4-45
FOR YOUR NOTES
4-46
5 Troubleshooting
5.1 Introduction
In this chapter, ventilator problems are listed along with possible causes and recommended
actions. Refer to the tables below to check the ventilator, isolate and eliminate the problems.
Once isolating the part you suspect defective, refer to 6 Repair and Disassembly to
disassemble the equipment and repair and replace the defective part.
5.2 Technical Alarm Check
Before troubleshooting the ventilator, check for technical alarm message. If an alarm message
is presented, eliminate the technical alarm first.
The following sections detail how to troubleshoot technical alarms related to the ventilator.
For detailed information on possible causes and actions for technical alarm messages of other
modules, refer to the Operator’s Manual.
In the “Level” column of the following table, the default alarm level is indicated: H for high,
M for medium, L for low and P for prompt message.
Alarm message
Level
Possible cause
Recommended action
RT Clock Need
Reset
L
There was no button cell
available in the system or
the battery had no
capacity.
1. Replace with a new button cell.
RT Clock Not Exist
H
Clock chip malfunction.
1. Restart the machine.
2. If the problem persists, replace the
main control board.
2. If the problem persists, replace the
board.
IP Address Conflict
L
Loading Default
Config. Failed
L
Restoring Last
Config. Failed
L
The IP address conflicted
with the IP address within
the network.
1. Set the IP address again.
There were configuration
items not loaded
successfully when loading
the default configuration.
1. Load the configuration again.
There were configuration
items not loaded
successfully during when
restoring the last
configuration items.
1. Load the configuration again.
5-1
2. If the problem persists, update the
system software code or replace the main
control board.
2. If the problem persists, update the
system software code or replace the main
control board.
2. If the problem persists, update the
system software code or replace the main
control board.
Alarm message
Level
Possible cause
Recommended action
SD Storage Card
Error
M
The storage card was
damaged or the storage
card was not installed
correctly.
1. Install the storage card again.
Insp. Hold
Interrupted
L
The duration of the status
of depressed Insp. Hold
key exceeded the upper
time limit set by the
system.
1. Check the key for failure.
Exp. Hold
Interrupted
L
The duration of the status
of depressed Exp. Hold
key exceeded the upper
time limit set by the
system.
1. Check the key for failure.
Keyboard Comm
Stop
H
The communication cable
between the keyboard and
main control board was
faulty.
1. Plug the keyboard communication
cable again.
2. If the problem persists, replace the
storage card.
2. Contact the vendor for repair if the key
is failed.
2. Contact the vendor for repair if the key
is failed.
2. Replace the keyboard communication
cable.
3. Check if the keyboard software is
correct.
4. If the problem persists, change the
keyboard PCBA.
5. If the problem persists, change the
main control board PCBA..
Keyboard Selftest
Error
H
Keyboard software failure.
1. Restart the machine.
2. Replace the keyboard software.
3. If the problem persists, replace the
keyboard.
Ventilator Reset
Error
Key Error
H
M
The ventilator main
control board, keyboard,
VCM, or VPM was reset.
1. Access the factory service menu to
check the cause of this alarm.
Key pressing timeout.
1. Correct the doctor’s operation if the
doctor presses the key too long.
2. Replace the relevant board.
2. Replace the keyboard communication
cable.
3. Replace the keyboard.
4. Replace the main control board.
Memory Error
H
Memory data storage
error.
5-2
Change the main control board.
Alarm message
Level
Possible cause
Recommended action
PCON2 Selftest
Error
H
POCN2 switch error.
Replace the POCN2 switch.
Board Mismatch
H
VCM board mismatch.
Replace with matched VCM board.
Battery in Use
L
The battery was being
used.
1. Check the AC power supply
connection.
2. If the AC power supply is connected
normally and the voltage is normal, check
the connection between the AC mains and
power board and check the socket.
3. If the problem persists, replace the
power board.
Battery Undetected
M
No battery was installed,
or the line between the
battery and power module
was not connected.
1. Check if the battery voltage is normal.
2. Check if the cable connection is
normal.
3. Replace the battery.
4. If the problem persists, replace the
power board.
System DOWN for
battery depletion!
H
The battery was faulty,
resulting in charging
failure.
1. Connect to AC power supply. Measure
the battery voltage. Check if the battery is
chargeable.
The system software
version did not match the
machine type.
2. Check if the system software version
matches the current machine type. If not,
update the system software.
3. If the problem persists, replace the
power board.
Low Battery Voltage
H
The battery voltage was
too low.
1. Connect to AC power supply
immediately if the system is operational.
2. Check if the battery is normal.
3. Check if the charging circuit is normal.
If charging is not possible, replace the
power board.
Internal Power
Supply Error
H
Board internal power
supply error.
1. Measure the voltage of the
corresponding test point.
2. If the problem persists, replace the
power board.
5-3
Alarm message
Level
Possible cause
Recommended action
Air Supply Pressure
Low
H
The Air pressure was low.
1. Check if the Air pressure switch is
normal. If not, replace it.
2. Check if the Air supply is turned on or
if the supply pressure is adequate. If the
Air supply is not turned on or if the
supply pressure is not adequate, handle
the case.
O2 Supply Pressure
Low
H
The O2 pressure was low.
1. Check if the O2 pressure switch is
normal. If not, replace it.
2. Check if the O2 supply is turned on or
if the supply pressure is adequate. If the
O2 supply is not turned on or if the
supply pressure is not adequate, handle
the case.
No Gas Supply
Pressure
H
The Air and O2 supply
pressures were low.
1. Check the Air pressure switch. Replace
the switch if it is damaged.
2. Check the Air supply. If Air supply is
not turned on, turn it on. If the supply
pressure is not adequate, replace the gas
supply.
3. Check the O2 pressure switch. Replace
the switch if it is damaged.
4. Check the O2 supply.
Airway Leak?
L
The tube at patient
connection was leaky.
1. Check the tube at patient connection
for leakage. If the tube is leaky, replace it.
2. Check the flow sensor. If it is not
accurate, calibrate again.
3. Check the pressure sensor. If it is not
accurate, calibrate again.
Airway Obstructed?
H
The tube at patient
connection was
obstructed.
1. Check the tube at patient connection
for obstruction. If the tube is obstructed,
dredge it.
2. Check the flow sensor. If it is not
accurate, calibrate again.
3. Check the pressure sensor. If it is not
accurate, calibrate again.
5-4
Alarm message
Level
Possible cause
Recommended action
Tube Disconnected?
H
The tube at patient
connection was
disconnected.
1. Check if the tube at patient connection
is disconnected or loose. If yes, connect
again.
2. Check the flow sensor. If it is not
accurate, calibrate again.
3. Check the pressure sensor. If it is not
accurate, calibrate again.
TV Not Achieved
L
The tidal volume did not
reach the set value.
1. Check if the tube is leaky. If yes,
connect again.
2. Check the flow sensor. If it is not
accurate, calibrate again.
3. Check if the parameter settings are
reasonable.
Pinsp Not Achieved
L
The airway peak pressure
did not reach the set value.
1. Check if the tube is leaky. If yes,
connect again.
2. Check the flow sensor. If it is not
accurate, calibrate again.
3. Check the parameter settings.
Sustained Airway
Pressure
H
PEEP Too High
H
The patient’s airway
pressure is sustained at the
relatively high level.
1. Check the parameter settings.
PEEP is too high.
1. Check the pressure sensor. If it is not
accurate, calibrate again.
2. Check the sensor. If it is not accurate,
calibrate again.
2. Check the parameter settings.
Tinsp Too Long
Ctrl Module Comm
Error
L
H
In the PSV mode, the
spontaneous breathing
could not satisfy the
breathing sensitivity all
the time, which caused
inspiration unable to end.
1. Check the parameter settings.
The communication
between the monitoring
board and main control
board was not stable.
1. Check the connector between the
monitoring board and main control board.
If the connection is not good, replace and
connect again.
2. Check and replace the pressure and
flow sensors.
2. Check the monitoring module for
damage. If there is damage, replace the
monitoring module.
3. Check the main control board for
damage. If there is damage, replace the
main control board.
5-5
Alarm message
Level
Possible cause
Recommended action
Ctrl Module Comm
Stop
H
The communication
between the monitoring
board and main control
board was interrupted.
1. Check the connector between the
monitoring board and main control board
for damage. If there is damage, replace
the relevant board.
2. Check the monitoring module for
damage. If there is damage, replace the
monitoring module.
3. Check the main control board for
damage. If there is damage, replace the
main control board.
4. Check the software version for
compatibility and update the software.
Ctrl Module Selftest
Error
H
Monitoring module
hardware failure.
Check and replace the monitoring
module.
Protection Module
Comm Error
H
The communication
between the protection
module and main control
board was not stable.
1. Check and replace the protection
module.
The communication
between the protection
module and main control
board was interrupted.
1. Check and replace the protection
module.
Protection Module
Comm Stop
H
2. Check and replace the main control
board.
2. Check and replace the main control
board.
3. Check the software version for
compatibility and update the software.
Protection Module
Selftest Error
H
Protection module
hardware failure.
Check and replace the protection module.
Heating Module
Failure
L
Heating module hardware
failure.
Replace the heating module.
Fan Failure
M
Fan hardware failure.
Replace the fan.
Internal Temperature
Too high
M
The temperature of the
power board was too high.
1. Check if the fan works normally. If not,
replace the fan.
2. Check if the power board works
normally. If not, replace the power board.
Pressure Sensor
Failure
H
1. The inspiratory pressure
sensor was faulty.
1. Replace the inspiratory pressure sensor.
2. The expiratory pressure
sensor was faulty.
3. Replace the PEEP pressure sensor.
3. The PEEP pressure
sensor was faulty.
5-6
2. Replace the expiratory pressure sensor.
Alarm message
Level
Possible cause
Recommended action
Exp. Flow Sensor
Failure
M
The expiratory flow
sensor was faulty.
1. Zero the expiratory flow sensor.
O2 Sensor Failure
M
The O2 sensor was
expired or was not
installed.
1. Check if the O2 sensor is expired. If
yes, replace the O2 sensor.
2. Replace the expiratory flow sensor.
2. Check if the O2 sensor cable is loose.
If yes, connect the cable again.
Please calibrate O2
sensor.
L
The O2 sensor was not
calibrated.
Perform 21% and 100% O2 sensor
calibrations again.
Air Insp. Limb
Failure
H
1. The Air inspiratory
valve was faulty.
1. Check if the inspiratory valve works
normally. If not, replace the inspiratory
valve.
2. The inspiratory flow
sensor in Air limb was
faulty.
O2 Insp. Limb
Failure
H
2. Check the inspiratory flow sensor.
3. Replace the inspiratory valve or
inspiratory flow sensor and calibrate it.
1. The O2 inspiratory
valve was faulty.
1. Check the inspiratory valve. If the
valve is faulty, replace it.
2. The inspiratory flow
sensor in O2 limb was
faulty.
2. Check the inspiratory flow sensor. If
the sensor is faulty, replace it.
3. Replace the inspiratory valve or
inspiratory flow sensor and calibrate it.
Ctrl Module Init
Error
H
The monitoring module
was faulty.
Check the monitoring board hardware. If
it is faulty, replace it.
Please perform
pressure calibration.
H
The pressure sensor was
not calibrated.
1. Calibrate the pressure sensor.
2. Replace the monitoring module.
3. Replace the pressure sensor.
Please perform flow
calibration.
H
The flow sensor and
inspiratory valve were not
calibrated.
1. Calibrate the flow sensor and
inspiratory valve.
2. Replace the monitoring module.
3. Replace the flow sensor.
Insp. Gas Temp Too
High
The temperature of
inspiratory gas exceeded
the limit.
1. Check the heating module. If the
module is faulty, replace it.
The buzzer was damaged.
Check and replace the buzzer.
H
Buzzer Failure
L
5-7
2. Check the temperature sensor. If the
sensor is faulty, replace it.
Alarm message
Level
Possible cause
Recommended action
Volume Limited
L
In pressure ventilation
mode, the gas volume
delivered exceeded the set
tidal volume and
expiration was switched
to.
1. Check the parameter settings.
2. Check the flow sensor. If the sensor is
faulty, replace it.
3. Check if the software gives a false
alarm. If yes, update the software.
4. Check the monitoring module. If the
module is faulty, replace it.
Nebulizer Valve
Failure
M
Nebulizer valve control
error.
Check and replace the nebulizer valve.
3-way Valve Failure
M
Three-way valve control
error.
Check and replace the 3-way valve.
Insp. Temperature
Sensor Failure
H
The status of inspiratory
temperature sensor was
abnormal at power-on
selftest.
1. Restart the ventilator.
2. Check the temperature sensor. If the
sensor is faulty, replace it.
3. Check the heating module. If the
module is faulty, replace it.
Protection Module
Init Error
H
The protection module
was faulty.
Check the protection module hardware. If
it is faulty, replace it.
CO2 Comm Stop
H
The communication
between CO2 and main
control board was
interrupted.
1. Check CO2 and system software
versions.
2. Check the CO2 communication cable.
If the cable is faulty, replace it.
CO2 Comm Error
H
The communication
between CO2 and main
control board was not
normal.
Check the CO2 communication cable. If
the cable is faulty, replace it.
CO2 Sensor High
Temp
L
The temperature of the
sensor assembly was too
high (>63℃).
Replace the CO2 module.
Replace the CO2 module.
CO2 Sensor Low
Temp
L
The temperature of the
sensor assembly was too
low (<5℃).
CO2 High Airway
Pressure
L
The airway pressure was
too high (>790 mmHg).
Replace the CO2 module.
CO2 Low Airway
Pressure
L
The airway pressure was
too low (<428 mmHg).
Replace the CO2 module.
Replace the CO2 module.
L
The barometric pressure
was greater than 790
mmHg.
CO2 High
Barometric
5-8
Alarm message
Level
Possible cause
Recommended action
CO2 Low
Barometric
L
The barometric pressure
was less than 428 mmHg.
Replace the CO2 module.
1. The external A/D
sampling 2.5V was
abnormal/
Replace the CO2 module.
CO2 Hardware
Error
2. The 12V power supply
voltage was abnormal.
H
3. The internal A/D
sampling 2.5V was
abnormal.
4. The pump was
abnormal.
5. The 3-way valve was
abnormal.
CO2 Sampleline
Occluded
CO2 System Error
The sampling line was
abnormal or occluded.
Replace the CO2 module.
L
The alarm was triggered
by multiple system errors.
Replace the CO2 module.
L
The water trap was
disconnected or was not
connected properly.
Replace the CO2 module.
L
The parameter measured
value was outside the
measurement range (error
range was counted).
1. Check if the measure mode is correct.
The parameter measured
value was outside the
measurement range (error
range was counted).
1. Check if the measure mode is correct.
The CO2 module was
faulty.
Replace the CO2 module.
L
CO2 No Watertrap
EtCO2 Overrange
L
FiCO2 Overrange
CO2 Zero Failed
L
2. Replace the CO2 module.
2. Replace the CO2 module.
CO2 Init Error
H
An error occurred during
CO2 module initialization.
Replace the CO2 module.
CO2 Selftest Error
H
An error occurred during
CO2 module selftest.
Replace the CO2 module.
5-9
5.3 Pneumatic System Problems
The pneumatic system is mainly composed of gas supply subsystem, flow control subsystem,
safety valve subsystem, and expiration module. This section details possible failures
regarding the pneumatic system and how to troubleshoot them.
5.3.1 Commonly Used Equipment and Tools
The commonly used equipment and tools for troubleshooting pneumatic circuit related
failures are:
1.
Commonly used tools such as cross screwdriver, Allen wrench, and ordinary wrench;
2.
1MPa test pressure gauge;
3.
Φ4 and Φ6 PU tube, Φ6 silicone tube;
4.
Y piece, 4 to 6 and 6 to 6 PU tube adapters (3106-04-06, 3106-06-00), Φ6 tee
(3140-06-00), breathing tube and corresponding tube plug (3126-04-00, 3126-06-00)
etc;
5.
Calibration device.
5.3.2 Gas Supply Subsystem
The following table lists the gas supply subsystem related failures.
Failure description
Possible cause
Recommended action
The DISS/NIST connector at
the gas supply inlet gets loose,
resulting in leakage.
The internal sealing ring of the
DISS/NIST connector is worn.
Replace the NORGREN
module inlet connector.
The filter cup at the gas supply
inlet is broken.
Collision or other cause.
Replace the filter cup.
The ON/OFF value of pressure
switch is not accurate.
The setting of pressure switch
is not accurate.
Set the ON/OFF value of
pressure switch again.
The output pressure of Air/O2
regulator is not accurate.
The setting of the regulator
output pressure is not accurate.
Set the regulator output
pressure again.
The ON/OFF value of pressure
switch is not accurate.
Set the ON/OFF value of
pressure switch again.
Air/O2 connection selection
valve is faulty.
Replace the NORGREN
module parts.
The nebulization pneumatic
resistor is occluded.
Clear the occlusion or replace
the pneumatic resistor.
The nebulization switch valve
is faulty.
Replace the NORGREN
module parts.
Air/O2 connection selection
valve is failed.
Nebulization is failed.
5-10
Failure description
Possible cause
Recommended action
The filter cup at Air supply
inlet is defective.
The filter cup is broken and
leaky etc.
Replace the filter cup.
The handle at the bottom of
the filter cup is damaged.
Replace the filter cup.
The filter cup is broken and
leaky etc.
Replace the filter cup.
The spring pin at the bottom of
the filter cup is damaged.
Replace the filter cup.
The filter cup at O2 supply
inlet is defective.
5.3.2.1 Loose DISS/NIST connector at the gas supply inlet, resulting in
leakage
The following picture shows the Air/O2 connector at the gas supply inlet. The head of this
connector (there are DISS and NIST specifications available) connecting the gas supply tube
can rotate freely for 360º in the vertical plane so as to adapt to the directional requirement
for the gas supply tube. Therefore, sealing inside the gas supply connector is not static and
the sealing ring may have the risk of leakage due to abrasion after long term of use.
Because the gas supply tube connected at the front end of this part is the starting part of
ventilator gas supply, and the supplied gas is adequate and is high pressure gas not regulated
by the gas supply inlet assembly, severe leakage can be judged directly through the sound
while subtle leakage cannot be judged through the sound, which, however, doe not affect the
effect of the ventilator and is acceptable.
To confirm leakage, turn off the ventilator, connect the gas supply tubes and connect them
separately to Air/O2 supplies. Rotate the two connectors and listen if there is leaky sound. If
the sound is heard, it indicates leakage. Replacing the module is necessary.
The connections may
have leakage.
5-11
5.3.2.2 Failure of filter cup at Air/O2 supply inlet
The following picture shows the filter cup at Air/O2 supply inlet. For O2 filter cup, pressing
the spring pin drains the water and releasing the spring pin resets automatically. For Air filter
cup, water is drained by rotating the black handle at the bottom. After drainage, rotate the
handle to reset (the handle is in horizontal position when reset and slight deviation is
allowed).
Primarily, there are two possible failures occurring to the filter cup: leakage and drainage
failure. Generally, subtle leakage is not easily detected if not checked and will not affect the
use and performance of the machine. However, if not corrected for a long time, subtle
leakage can cause great leakage. When drainage failure occurs to the filter cup at Air/O2
supply inlet, leakage is usually resulted. Such leakage is generally caused by the failure at the
drainage part and will be very large. And it is easily detected when connecting the gas supply.
Meanwhile, because for air filter cup, the water is drained by rotating the drainage part, if
knob is broken when draining the water, reset failure or drainage failure will be resulted.
To troubleshoot the failure of filter cup getting broken, replace the service part directly.
To troubleshoot the failure of drainage part of the filter cup,

For Air filter cup: if the rotary handle is broken or if horizontal sealing is not possible,
replace the filter cup directly.

For O2 filter cup, if drainage failure occurs at the bottom, judge if the spring pin is
damaged. If yes, replace the filter cup direclty. If the spring pin is able to move freely to
reset, check if there are foreign substances at the bottom. Just clear the foreign substance.
If the problem persists, replace the fitle cup directly.
Drainage spring pin (push
upward, reset automatically)
5-12
Drainage handle (rotate clockwise or
counterclockwise)
5.3.2.3 Inaccurate ON/OFF value of pressure switch
The ON/OFF value of the pressure switch relates to the gas supply pressure alarm function
and Air/O2 connection selection valve switching function. If the ON/OFF value of the
pressure switch has great deviations, inaccurate functions can be resulted or system
mistrigger can be resulted if the case becomes much worse which will cause system
malfunction and endanger the patient’s life. Therefore, it is necessary to check the ON/OFF
value of the pressure switch.
You need to check the ON/OFF value of the pressure switch in the following typical
situations:
1.
Assembly testing in case of production assembling;
2.
FQC factory inspection;
3.
Equipment service at the customer side (possible drift after long term of use;
4.
Ventilator failure, such as frequent failure of Air/O2 connection selection valve,
pressure alarm malfunction (false alarm or no alarm) etc.
The primary tools necessary for checking the ON/OFF value of the pressure switch are:
1.
Gas supply (high pressure cylinder with regulator);
2.
Flathead screwdriver.
5-13
The following picture shows the pressure switch (some marks such as regulators in Air/O2
limbs, nebulization switch valve, and Air/O2 connection selection valve are given for the
convenience of future description and they may not be used in this section).
Use flathead screwdriver to
turn here when adjusting the
ON/OFF value of pressure
switch
Pressure switch (Air on the
left and O2 on the right)
Regulator in O2 limb
Nebulization
switch valve
Air/O2 connection
selection valve
Regulator in O2 limb
Nebulization
flow test point
5-14
In the above picture, pressure switch in Air limb is on the left side and pressure switch in O2
limb is on the right side. When checking the ON/OFF value of the pressure switch, connect
high pressure cylinders with regulating function. Test the ON/OFF value of the pressure
switch as follows:
1.
For pressure switch in Air limb: connect to Air supply alone and adjust the cylinder
regulator. Observe that the supply gas pressure rises slowly from 150 kPa to 250 kPa
through the regulator pressure gauge. During the pressure rise, listen to the pressure
switch carefully. When a click is heard, record the value displayed on the pressure gauge,
which represents the rising pressure ON/OFF value of pressure switch. This value is
required to be 220±10 kPa. If the test value is outside the range, adjust using flathead
screwdriver as shown in the picture. Turning clockwise decreases the ON/OFF value of
pressure switch while turning counterclockwise increases the ON/OFF value of pressure
switch. After completing adjustment of the ON/OFF value, do the test again. Note that
the test after each adjustment must be done at the stage when the pressure rises from low
to high. Do not test in the reverse order. After adjusting the rising pressure ON/OFF
value of pressure switch, you need to confirm the falling pressure alarm value of
pressure switch. Observe the pressure gauge. Adjust the regulator to control the supply
gas pressure to fall slowly from 250 kPa. When a click is heard, record the value
displayed on the pressure gauge, which represents the falling pressure ON/OFF value of
pressure switch. This value is required to be not less than 180 kPa. If the value is outside
the range, the pressure switch is not qualified.
2.
For pressure switch in O2 limb, the adjustment method is the same. When adjusting, you
need to close the gas supply in Air limb and remove the high pressure gas through the
filter in Air limb.
During the adjustment described above, if the pressure switch fails to reach the required value
(220±10 kPa for rising pressure ON/OFF value and not less than 180 kPa for falling
pressure ON/OFF value), it indicates that the pressure switch is damaged and the module
needs to be replaced,
5.3.2.4 Inaccurate output pressure of Air/O2 regulator
The regulator in Air/O2 limb functions to reduce the supply gas pressure and stabilize the
effect of supply gas pressure fluctuation upon the rear part. After long term of use, the
ventilator may have the problem of inaccurate output pressure of Air/O2 regulator. Generally,
you need to check the output pressure of Air/O2 regulator in the following cases:
1.
Assembly testing in case of production assembling;
2.
FQC factory inspection;
3.
Equipment service at the customer side;
4.
Ventilator failure, such as severe drift of flow control.
5-15
The primary tools necessary for checking and adjusting the output pressure of Air/O2
regulator are:
1.
Gas supply of 400 kPa (high pressure cylinder with regulating function);
2.
Φ6 PU tube and quick-plug connector;
3.
1 MPa pressure gauge;
4.
Ordinary wrench and hexagon wrench.
Refer to the picture in the previous section. The procedures for adjusting the output pressure
at the rear end of the regulator in Air limb are:
1.
Connect to the cylinder gas supply and adjust the supply gas pressure to 400±10 kPa.
2.
Connect the 1 MPa pressure gauge to the nebulization flow test point using PU tube and
quick-plug connector.
3.
Open the nebulization switch valve in the valve test tool of ventilator factory service
mode. Adjust the proportional valve in Air limb to produce flow of approximately 5
L/min.
4.
Observe the reading on the pressure gauge. The pressure should be between 220±5 kPa
for E3 and 172±5 kPa for E5. Otherwise, adjust the regulator in Air limb.
5.
To adjust the regulator, loosen the hexagon nut facing the regulator using ordinary
wrench. Adjust the plastic screw using proper hexagon wrench. Turning clockwise
increases the pressure while turning counterclockwise decreases the pressure. While
adjusting, observe the reading on the pressure gauge. When the pressure value reaches
the requirement, tighten the hexagon nut. When tightening the hexagon nut, observe the
reading on the pressure gauge. Generally, the pressure falls a bit. In this case, reserve
some margin at the beginning of adjusting pressure.
The procedures for adjusting the output pressure at the rear end of the regulator in O2 limb
are similar to that in Air limb.
5.3.2.5 Failed Air/O2 connection selection valve or nebulization
The Air/O2 connection selection valve functions to ensure normal nebulization and PEEP
control in case of single gas supply.This valve affects multiple ventilation modes and
nebulization function. The nebulization switch valve functions to control the
connection/disconnection of nebulization gas flow, which also affects patient therapy.
5-16
When the Air/O2 connection selection valve is failed, the function of connection selection is
failed. Namely, when there is only O2 supply, nebulization and PEEP control is failed. When
there is only O2 supply, nebulization switch and PEEP value are controlled through the valve
test tool in the factory service mode. If there is no gas flow in nebulization and the PEEP
value is always “0”, it indicates that the function of Air/O2 connection selection is failed. In
this case, there are two ways to solve this problem:
1.
Refer to the previous section to confirm that the pressure switch functions normally.
2.
If both of the pressure switch function and ON/OFF value are normal, the fault goes to
the Air/O2 connection selection valve. You need to replace the component.
In the precondition that the function of Air/O2 connection selection is normal, connecting Air
or O2 supply alone can judge whether the nebulization function is normal. Control
nebulization switch through the valve test tool in the factory service mode and connect the
nebulization exhaust port to anesthesia calibration device through a PU tube to test if the
nebulization gas flow is normal. To judge whether the nebulization gas flow is normal:
1.
The nebulizaton switch valve may be damaged if there is no nebulization gas flow. In
this case, replace the component.
2.
Check the nebulization resistor for obstruction or replace the nebulization resistor if the
nebulization gas flow is not abnormal.
5-17
5.3.3 Flow Control Subsystem
The flow control subsystem is the critical part of the ventilator to implement various
ventilation modes. Its composition is relatively simple and it is mainly composed of
proportional valve and inspiratory flow sensor.
5.3.3.1 Proportional valve failure
The type of large flow proportional valve which the E5 ventilator uses is WOODWARD
1350-5102. The possible failures related to this valve are that the leakage exceeds the
requirement when the valve is closed and that the minimum opening flow exceeds the
requirement. Troubleshoot the proportional valve related failures in the following cases:

The leakage exceeds the requirement when the proportional valve is closed: in the valve
test tool of ventilator factory service mode, the DA value of the proportional valve is set
to “0”. The flow measured by the inspiratory flow sensor exceeds the specified
maximum leakage requirement, which is 50 ml/min. If this is detected during unit
assembly, provide proportional valve with great excitation current (DA) and then set DA
value to “0” and “4095” (maximum value). Repeat for multiple times (three times
recommended). Observe again if leakage is normal. Otherwise, replace the proportional
valve. When replacing the proportional valves, note that the two gas channels at the
bottom of the proportional valves cannot be attached with foreign substance and that the
proportional valves cannot collide with each other. The distance between the two
proportional valves cannot be less than 2.5 cm.

The minimum opening flow exceeds the requirement: in the diagnostic mode, the DA
value of proportional valve is adjusted gradually from “0” to greater value. The
minimum opening flow measured by the inspiratory flow sensor exceeds the specified
requirement (such as 2 L/min). Generally, this is caused by the internal failure of
proportional valve. You need to replace the proportional valve. Pay attention to the note
mentioned before when replacing the proportional valve.
WOODWARD proportional valve
5-18
5.3.3.2 Inspiratory flow sensor data error
When connecting the calibration device to the inspiratory port to measure the flow of
proportional valve, if the data from the ventilator internal inspiratory flow sensor and that
from the calibration device differ greatly (deviation of more than 5% when the flow is
between 0-120 L/min), troubleshoot as follows:
1.
Make sure that the calibration device is within the valid calibration period. If it is out of
calibration, use correct external tool.
2.
Check if the filter screen assembly (115-008652-00) at the front end of inspiratory flow
sensor is normal. If not, replace the assembly. Re-do the test and check if the
measurement data are within the allowable error range.
3.
If the problem persists, the inspiratory flow sensor may be failed. Troubleshoot this
problem by referring to the section of hardware related failures.
Inspiratory flow sensor
5-19
5.3.4 Safety Valve Subsystem
The safety valve subsystem functions to ensure that the pressure of inspiratory limb is within
the safety range, monitor O2 concentration, and support spontaneous breathing.
110 cmH2O pressure relief valve
Electromagnet
O2 sensor
The possible failure related to this assembly is O2 sensor failure. Regarding the problem of
O2 sensor failure, initial judgment can be made based on the replacement cycle of the O2
sensor (once per year). If the replacement duration is relatively short and the O2
concentration detection is not accurate, you need to calibrate O2 concentration. If O2
concentration detection is still inaccurate, judge if it is caused by O2 sensor failure. The
judgment methods are:
1.
Open the Air proportional valve alone and wait for O2 concentration measured value to
become stable. Check if the O2 concentration is 21% (subtle deviation is allowed). If not,
it indicates that the O2 sensor is failed. You need to replace the O2 sensor. If yes,
continue with the following step.
2.
Open the O2 proportional valve alone and wait for O2 concentration measured value to
become stable. Check if the O2 concentration is 100% (subtle deviation is allowed). If
yes, it indicates that the O2 sensor is not damaged. If not, replace the O2 sensor.
To replace the O2 sensor, remove the connection cable at the tail directly. Remove the O2
sensor. Then install the new O2 sensor. When installing the new O2 sensor, tighten it properly
to prevent damage or overtightness, causing inconvenience to the future service.
5-20
5.4 Hardware and Electrical System Problems
Failure description
Possible cause
Recommended action
At startup, the operational
indicator lamp, AC indicator
lamp, and the battery
indicator lamp are not lit and
there is no screen display
available. Namely, the
ventilator fails to start up.
The AC power supply is not
connected and the battery capacity
is not sufficient.
Check and make sure of the
correct connection of the AC
power supply.
The fuse of the AC mains inlet is
burned out and the battery capacity
is insufficient.
Replace the fuse. If the problem
persists, it indicates that the
machine is internally short
circuited.
The display cable (at the
motherboard or the main unit
external connector) is disconnected
or is not reliably connected.
Check and make sure of the
reliable connection of the cable.
Make sure that the captive
screw is in tightened status.
The cable related to power switch is
disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The AC-DC board hardware circuit
failure causes no 15.2V output and
insufficient battery capacity.
Replace the AC-DC board.
At startup, the AC indicator
lamp and battery indicator
lamp are lit while the
operational indicator lamp is
not lit. There is no screen
display available.
The DC-DC board hardware circuit
failure causes no DC current output
of 5V, 3.3V, 7V, and 12V.
Replace the DC-DC board.
There is no screen display
available (black screen).
The inverter connection lines
(including the inverter input line
and output line) are disconnected or
are not reliably connected.
Check and make sure of the
reliable connection of the cable.
The inverter is damaged.
Replace the inverter.
The main control board hardware
failure causes the backlight enable
signals to output invalid level.
Replace the main control board.
The main control board software
failure causes the backlight enable
signals to output invalid level.
Update the main control board
software.
The LCD is damaged.
Replace the LCD.
5-21
Failure description
Possible cause
Recommended action
There is no screen display
available (white screen).
The display cable (at the LCD) is
disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The main control board hardware
failure causes no 3.3V output or
output error.
Replace the main control board.
The LCD is damaged.
Replace the LCD.
There is screen display
available but there is color
error displayed (screen
blurred).
The display cable (at the LCD) is
disconnected or is not reliably
connected, which causes the loss of
some color signals.
Check and make sure of the
reliable connection of the cable.
The screen brightness cannot
be adjusted.
The DC-DC board hardware failure
causes the backlight brightness
adjustment signals unable to output
normal signals.
Replace the DC-DC board.
The main control board hardware
failure causes the backlight
brightness adjustment signals
unable to output normal signals.
Replace the main control board.
The inverter connection lines
(including the inverter input line
and output line) are disconnected or
are not reliably connected.
Check and make sure of the
reliable connection of the cable.
The inverter is damaged.
Replace the inverter.
The display cable is disconnected or
is not reliably connected.
Check and make sure of the
reliable connection of the cable.
The alarm lamp board connection
line is disconnected or is not
reliably connected.
Check and make sure of the
reliable connection of the cable.
The main control board hardware
failure causes failure to output
normal alarm lamp control signals.
Replace the main control board.
The alarm lamp board hardware
failure causes failure to drive the
alarm lamp.
Replace the alarm indicator
lamp board.
The alarm indicator lamp is
not lit.
5-22
Failure description
Possible cause
Recommended action
Key failure.
The key related connection line is
disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The key control board hardware
failure causes failure to respond to
key input information.
Replace the key control board.
The encoder board connection line
is disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The rotary encoder is damaged.
Replace the rotary encoder.
The key control board hardware
failure causes failure to respond to
rotary encoder input information.
Replace the button control
board.
The touchscreen related cable is
disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The key control board hardware
failure causes failure to respond to
touchscreen input information.
Replace the button control
board.
The touchscreen is damaged.
Replace the touchscreen.
The speaker related cable is
disconnected or is not reliably
connected.
Check and make sure of the
reliable connection of the cable.
The main control board hardware
failure causes failure to output
normal speaker drive signals.
Replace the main control board.
The speaker is damaged.
Replace the speaker.
Rotary encoder failure
Touchscreen failure.
Speaker failure.
5-23
5.5 Troubleshoot Sensor and Valve Related Failures by
Using the Valve Test Tool
5.5.1 Preparations before Using the Valve Test Tool
Make the following preparations before using the valve valve tool to locate the sensor or
valve related failures:
1
Connect the pneumatic circuit according to the type of sensor or valve to be checked.

Constant-flow connection method: Connect the tubes of the ventilator following the
constant-flow connection method to check the flow sensors and inspiratory valve.
For details, refer to 4.3.4Check the Flow Sensor Accuracy.

Constant-pressure connection method: Connect the tubes of the ventilator following
the constant-pressure connection method to check the pressure sensors and
expiratory valve. For details, refer to 4.3.5Check the Pressure Sensor Accuracy.
2.
Make sure that the supply gas pressure is normal.
3.
When the system is Standby, select the Menu key and then select [Maintain >>] →
[Service >>] → [Diagnosis >>] to access the [Valve Test] menu.
5.5.2 Correspondence between the Sensors & Valves on the
Valve Test Screen and the Components
To troubleshoot the sensors or valves related failures by using the valve test tool, you must be
familiar with the correspondence between the menu options on the valve test tool screen and
the actual pneumatic circuit and hardware components.
5-24
5.5.2.1 Correspondence with Pneumatic Components
The following picture shows the correspondence between the sensors & valves on the valve
test tool screen and the actual components in the pneumatic circuit diagram.
5-25
5.5.2.2 Correspondence with Hardware Components
The following pictures show the actual sampling line connections of the sensors.
Inspiration module interface board
Inspiratory pressure sensor
Inspiratory pressure sampling line
Inspiratory module pneumatic and hardware connections
5-26
Low-pressure end of
expiratory flow
differential pressure
PEEP pressure sensor
Expiration module
interface board
Expiratory flow sensor
Expiratory pressure sensor
High-pressure end of expiratory flow
differential pressure
Expiratory module pneumatic and hardware connections
5-27
5.5.3 Troubleshooting Methods Using Valve Test Tool
By using the valve test tool, you can troubleshoot the problems related to:

Sensor zero point

Sensor sampling line connection

Sensor calibration data

Inspiratory valve status

Expiratory valve status

Safety valve status
5.5.3.1 Sensor zero point error
By using the valve test tool, you can easily detect if the zero points of all the pressure and
flow sensors of the ventilator are normal.
To diagnose sensor zero point error:
1.
Disconnect all gas supplies. Disconnect the patient from the tubes. Make sure that the
pressure and flow sensors are in the zero point environment.
2.
Check the actual measured values of all sensors in the valve test menu. If the actual
value is greater than “0.5”, it indicates that this sensor requires zeroing.
3.
If the actual measured values of all sensors near “0”, check their zero point AD values.
If the zero point AD value of some sensor is outside the valid range, it indicates that this
sensor is faulty. You need to replace the sensor. After replacing the faulty sensor,
perform zeroing again. If the zero point AD value of the sensor is still outside the valid
range, it indicates that the monitoring board is faulty. You need to replace the board.
NOTE

For the normal range of sensors’ zero points, refer to 4.3.3Check the Sensor Zero
Point.
5-28
5.5.3.2 Sensor sampling line connection error
The expiratory flow sensor has two sampling lines. Generally, connection error can be:

Two sampling lines are connected reversely;

One sampling line is not connected;

Two sampling lines are not connected.
The pressure sensor has one sampling line. Generally, connection error can be:

The sampling line is not connected;

The sampling line is not correctly connected.
By using the valve test tool, you can detect if the sensor sampling lines are connected
normally.

To diagnose the sampling line connection error of expiratory flow sensor:
1.
Make sure that the gas supplies are normal. Access the valve test menu.
2.
Increase the DA setting of the inspiratory valve gradually (open inspiration valve flow to
10L/Min). The AD value of the flow sensor should also increase. With the gradual
increase of gas supplied,

If the AD value of one flow sensor decreases gradually, it is possible that the two
sampling lines of the flow sensor are connected reversely.

If the AD value of one flow sensor nears zero point and keeps unchanged, it is
possible that the two sampling lines of the flow sensor are not connected or the
sampling line at the high pressure end is not connected.

If the low pressure end of the flow sensor is not connected, the AD value of the
flow sensor cannot help judgment of this situation. Disassemble the machine for
inspection when necessary.
3.
If sensor sampling line connection error is detected, re-connect the sampling lines by
referring to the pneumatic connection process and make sure of connection correctness
following this above described method.

To diagnose the sampling line connection error of pressure sensor:
1.
Make sure that the gas supplies are normal. Access the valve test menu.
2.
Increase the DA setting of the expiratory valve gradually. Check if the AD values of
expiratory pressure sensor and PEEP pressure sensor also increase.
3.

If the AD value of one pressure sensor decreases gradually, it is possible that the
sampling line of the pressure sensor is connected incorrectly.

If the AD value of one pressure sensor keeps unchanged, it is possible that the
sampling line of the pressure sensor is not connected.
If sensor sampling line connection error is detected, re-connect the sampling line by
referring to the pneumatic connection process and make sure of connection correctness
following this above described method.
5-29
5.5.3.3 Sensor calibration data error
After confirming that both the sensor zero point and sampling line connection are normal,
you can judge the accuracy of sensor calibration data by checking the calibration table.


To diagnose the calibration data error of flow sensor:

Select [Service] to access [Cal. Data] menu. Check [Air Flow] and [O2 Flow]
factory calibration data and user calibration data respectively.

For [Flow], the maximum value in the factory calibration data table should be
greater than 95 L/min and that in the user calibration data table should be greater
than 60 L/min.

In the [Flow] calibration data, Air/O2 flow, AD value of expiratory flow, AD value
of VPM expiratory flow, and DA value of inspiratory valve should all be in
descending tendency.

If the calibration table does not satisfy the above requirement, do flow calibration.
To diagnose the calibration data error of pressure sensor:

Select [Service] to access [Cal. Data] menu. Check [Pressure] factory calibration
data.

The maximum value in the [Pressure] factory calibration data should be greater
than 90 cmH2O.

In the [Pressure] Calibration data, pressure, AD value of PEEP pressure, AD value
of expiratory pressure, AD value of VPM inspiratory pressure, AD value of VPM
expiratory pressure, and DA value of expiratory valve should all be in ascending
tendency.

If the calibration table does not satisfy the above requirement, do pressure
calibration.
5.5.3.4 Inspiratory valve status error
By using the valve test tool, you can check if the working status of inspiratory valve is
normal.
1.
In the [Valve Test] menu, set the DA value of inspiratory valve to “0”. If the measured
values of inspiratory flow sensor, expiratory flow sensor, and standard equipment are all
greater than 1 L/min, it indicates that the inspiratory valve cannot be fully closed or that
there is some problem with the valve drive circuit.
2.
In the [Valve Test] menu, gradually increase the opening of inspiratory valve (increase
flow setting value). If all the measured values of inspiratory flow sensor, expiratory flow
sensor, and standard equipment do not change much and that gas flow felt at the
expiratory port is also very small, it indicates that the inspiratory valve is faulty or that
there is some problem with the valve drive circuit.
5-30
3.
If the flow measured by the standard flow measurement device still fails to reach 105
L/min when the DA value is set to more than “4000”, flow calibration is failed. In this
case, you need to replace the inspiratory valve or monitoring board.
4.
To locate if this is problem with the valve drive circuit, you can check the status values
of Air valve and O2 valve in the [Valve Test] menu. With the increase of DA value, the
status current sampling values of Air valve and O2 valve should also increase. Besides,
when the inspiratory valve control DA value is adjusted above “4000”, its status current
sampling value should be 100 to 160 mA for VT50 and 250 to 600 mA for VT30.
Otherwise, it indicates that there is some problem with the valve drive circuit of
inspiratory valve.
5.
After replacing the inspiratory valve or monitoring board, you can check if the problem
is fixed using the same method.
5.5.3.5 Expiratory valve status error
By using the valve test tool, you can check if the working status of expiratory valve is
normal.
1.
Make sure that the gas supplies are normal. Access the valve test menu and set the
inspiratory valve opening flow to 10 L/min.
2.
Set the DA value of expiratory valve to 0. If the measured values of inspiratory pressure
sensor, expiratory pressure sensor, and standard equipment are all greater than 1 cmH2O,
it indicates that the expiratory valve is faulty or that there is some problem with the
valve drive circuit.
3.
Gradually increase the pressure setting value of expiratory valve. The measured value of
expiratory pressure sensor (and the connected ventilator calibration device) also
increases. If the measured values of expiratory pressure sensor and standard equipment
do not change much, it is possible that the expiratory valve is faulty or the sampling line
is disconnected, or that there is some problem with the valve drive circuit.
4.
Note that there is a non-response area for the expiratory valve when the DA value is
relatively small (less than “2000”). When the DA value is less than this area, the
expiratory valve may not open and the output is “0” continuously. When the DA value
exceeds this area, the output increases with the increase of DA value.
5.
To locate if this is problem with the valve drive circuit, you can check the status value of
expiratory valve in the [Valve Test] menu. With the increase of DA value, the status
current sampling value of expiratory valve should also increase. Besides, when the
expiratory valve control DA value is adjusted above “4000”, its status current sampling
value should be 250 to 350 mA. Otherwise, it indicates that there is some problem with
the valve drive circuit of expiratory valve.
6.
After replacing the expiratory valve or monitoring board, you can check if the problem
is fixed using the same method.
5-31
5.5.3.6 Safety valve status error
There is some risk when the safety valve cannot be opened (namely, always closed). The
ventilator cannot perform normal mechanical ventilation when the safety valve cannot be
closed (namely, always opened).
By using the valve test tool, you can check if the safety vale can be opened or closed
normally.
1.
Make sure that the gas supplies are normal. Access the valve test menu.
2.
Set the status of safety valve to ON and you can hear a subtle click.
3.
Set expiratory valve pressure to 50 cmH2O and inspiratory valve opening flow to 5
L/min. Check the actual measured values of expiratory flow sensor and expiratory
pressure sensor, both of which should near “0” (less than “0.5”).Otherwise, it indicates
that the safety valve cannot be opened normally.
4.
Based on the above operations, set the status of safety valve to OFF. Then, the measured
value of expiratory flow sensor will near that of inspiratory flow sensor. The measured
value of expiratory pressure sensor will near the expiratory valve opening pressure.
Otherwise, it indicates that the safety valve cannot be closed normally.
5.
If safety valve control error is found, it is possible that there is some problem with the
drive voltage of safety valve. You can check the status value of safety valve in the valve
test menu. When the safety valve control is OFF, its status voltage value should be “0V”.
When the safety valve control is ON, its status voltage value should be about “1.7V”.
Otherwise, it indicates that there is some problem with the valve drive circuit of safety
valve.
6.
If the safety valve is faulty, replace the safety valve assembly. After replacing the safety
valve assembly, you can check if the problem is fixed using the same method.
5-32
6 Repair and Disassembly
WARNING

To help prevent fires, only use lubricants approved for ventilator or O2 equipment.

Do not use lubricants that contain oil or grease. They burn or explode in high O2
concentrations.

Obey infection control and safety procedures. Used equipment may contain blood
and body fluids.

Movable parts and removable components may present a pinch or a crush hazard.
Use care when moving or replacing system parts and components.

Use care when disassembling the parts with sharp edges to avoid cuts.

Pay attention to the screws during the disassembly to prevent screws from falling
into the inside of the equipment. Failure to do so may cause short circuit.

Make sure to bleed gas pressure before disassembling pneumatic fittings to avoid
personal injury caused by high pressure gas.
NOTE

When re-assembling, inspect all parts for deterioration. Replace them if necessary.
Use appropriate screws and parts.

After repairs are completed or parts replaced, refer to 1 错误!表格结果无效。 to
perform the checkout procedure.
6-1
6.1 Prepare for Disassembly
6.1.1 Tools
During parts disassembling and replacing, the following tools may be required:

Metric Allen wrench (2.5#, 3#, 4#, 5#)

Phillips screwdriver

Diagonal pliers

Flathead screwdriver

Metric M3 and M4 socket screwdriver

Adjustable wrench

Tweezers
6.1.2 Preparations
Before disassembling the ventilator, do the following:

Make sure that the ventilator is already turned off and that the ventilator is disconnected
from AC power supply and backup battery.

Remove all the accessories connected to the ventilator.

Disconnect pipeline and cylinder gas supply connections.

Prepare the tools required for disassembly.

Wear antistatic gloves or hand rings when removing the boards.

Maneuver the ventilator to an appropriate location and then step down the caster brake
(cart configured) to fix the ventilator.
CAUTION

The internal parts may be contaminated during long-term use of the equipment.
Wear

special gloves during disassembling and inspecting.
6-2
6.2 Disassemble the Assemblies
6.2.1 Remove the Ventilator Power Assembly
Take out the two screws as shown below. Hold the handle to pull out the ventilator power
assembly.
6.2.2 Remove the AC-DC Power Board and DC-DC Power
Board
1.
After removing the ventilator power assembly. Remove the three screws on the power
assembly as shown below.
6-3
2.
Remove the two screws fixing the AC-DC power board. Disconnect the connection line
to remove the AC-DC power board. Remove the two screws fixing the DC-DC power
board. Disconnect the connection line to remove the DC-DC power board.
Screw
DC-DC power board
AC-DC power board
Screw
6.2.3 Remove the Fan
1.
Remove the four sunk screws fixing the power panel. Disconnect the connection line to
pull out the power box panel assembly.
2.
Remove the four screws fixing the fan as shown below to remove the fan.
6-4
6.2.4 Remove the Main Control Board, Monitoring Board,
Extension Board, and Lithium Battery
1.
Remove the air filter for the module rack. Remove the four screws fixing the rear cover
of module rack as shown below.
Air filter
2.
Take out the PCB disassembling tool. Pull out the main control board, monitoring board,
extension board with the PCB disassembling tool. Take out the lithium battery.
VT50 monitoring board
PCB disassembling tool
VT50 extension board
Lithium battery
6-5
VT50 main control board
Install the PCB
disassembling tool
onto the board
holes to remove
the board.
WARNING

When the ventilator is restalled, or main control board is repalced, the altitude
must be reset. After reseting the altitude value, perform flow calibration (factory)
again.
6.2.5 Remove the O2 Sensor
1.
Open the O2 sensor door.
2.
Pull out the O2 sensor connection line to remove the O2 sensor.
O2 sensor door
6-6
O2 sensor
6.2.6 Remove the Expiration Valve Assembly
Release the buckle to remove the expiration valve assembly.
Expiration valve
assembly
Buckle
6.2.7 Remove the Flow Sensor Assembly
1.
Do as the step described in 6.2.6Remove the Expiration Valve Assembly.
2.
Pull out the flow sensor assembly from the expiration valve assembly.
Flow sensor
assembly
6-7
6.2.8 Remove the Expiration Valve Diaphragm Assembly
1.
Do as the step described in 6.2.6Remove the Expiration Valve Assembly.
2.
Remove the expiration valve cover to take out the expiration valve diaphragm assembly.
Expiration valve diaphragm assembly
Remove the expiration
valve cover
6.2.9 Remove VT50 Kernel Assembly
1.
Do as the step described in 6.2.6Remove the Expiration Valve Assembly.
2.
Remove the screws on the power cord fixed plate to remove the fixed plate.
3.
Remove the power leadin connecting the power box.
4.
Remove the screw for the display connection line connector to remove the display
connector.
5.
Remove the four screws fixing the kernel assembly to pull out the kernel assembly.
Screw
Power cord fixed plate
Screw
Remove the connector for
the display connection line
6-8
Remove the power leadin
6.2.10 Remove VT30 Kernel Assembly
1.
Do as the step described in 6.2.6Remove the Expiration Valve Assembly.
2.
Remove the screws on the power cord fixed plate to remove the fixed plate.
3.
Remove the power leadin connecting the power box.
4.
Remove the four screws fixing the kernel assembly to pull out the kernel assembly.
Screw
Screw
Power cord fixed plate
Remove the power leadin
5.
Remove the screw for the display connection line connector to remove the display
connector. Pull out the kernel assembly.
Remove the connector for
the display connection line
6-9
6.2.11 Remove the Gas Supply Control Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove VT50 inspiratory interface board connection line which connects the
inspiration module.
3.
Disconnect the hose connecting the gas supply control assembly.
VT50 inspiratory interface board connection line
4.
Disconnect the hose
Remove the five screws fixing the gas supply control assembly. Pull backward and then
lift the gas supply control assembly and safety valve gas reservoir assembly.
Screw
Screw
6-10
6.2.12 Remove the Expiration Valve Seat Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Disconnect the hose connecting the expiration valve seat assembly.
3.
Remove the four screws fixing the expiration valve seat assembly and pull forward to
remove the expiration valve seat assembly.
Disconnect the hose
Screw
6-11
6.2.13 Remove the Filters
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Disconnect the hoses connected to the filters to remove the filters. There are three filters
in total.
6.2.14 Remove the Safety Valve Gas Reservoir Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the four screws fixing the safety valve gas reservoir assembly.
3.
Disconnect the relevant cable and hose. Pull forward to remove the safety valve gas
reservoir assembly.
6-12
6.2.15 Remove the Inspiration Module Board
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Disconnect all the cables and hoses connecting the inspiration module board.
3.
Remove the five screws fixing the inspiration module board to remove the board.
6.2.16 Remove the Flow Sensor
1.
Do as the step described in 6.2.14Remove the Safety Valve Gas Reservoir Assembly.
2.
Disconnect the connection line for flow sensor.
3.
Pull out the flow sensor.
VT50 kernel
VT30 kernel
Air flow sensor
Air flow sensor
O2 flow sensor
6-13
O2 flow sensor
6.2.17 Remove the Proportional Valve
1.
Do as the step described in 6.2.16Remove the Flow Sensor.
2.
Disconnect the cable connecting the proportional valve.
3.
Remove the four screws fixing the proportional valve and remove the proportional
valve.
6.2.18 Remove the Pneumatic Assembly
1.
Do as the step described in 6.2.16Remove the Flow Sensor.
2.
Disconnect the cables and hoses connecting the pneumatic assembly.
3.
Remove the four screws fixing the board fixed mount for the pneumatic assembly to
remove the fixed mount
6-14
4.
Remove the five screws fixing the pneumatic assembly and remove the pneumatic
assembly.
6.2.19 Remove the 110 cmH2O Pressure Relief Valve
Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the 110 cmH2O pressure relief valve assembly from the safety valve seat
assembly.
110 cmH2O pressure relief valve assembly
6-15
6.2.20 Remove the Safety Valve Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the four screws fixing the safety valve.
3.
Disconnect the connection lines.
4.
Remove the silicone tube and remove the safety valve assembly.
Silicone tube
6.2.21 Remove the Three-way Valve and Connection Line
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the two screws fixing the three-way valve and connection line.
3.
Disconnect the relevant cable and hose and remove the three-way valve and connection
line.
Three-way valve and connection line
6-16
6.2.22 Remove the 10 cmH2O Pressure Relief Valve
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the two screws fixing the fixed plate for pressure relief valve. Remove the fixed
plate.
3.
Take out the 10 cmH2O pressure relief valve.
Check valve diaphragm
Fixed plate for
pressure relief valve
6-17
10 cmH2O pressure relief valve
6.2.23 Remove the Electromagnet
1.
Do as the step described in 6.2.20Remove the Safety Valve Assembly.
2.
Remove the four screws for electromagnet and pull out the electromagnet with effort.
Electromagnet
6.2.24 Remove the Safety Valve Diaphragm Assembly
1.
Do as the step described in 6.2.23Remove the Electromagnet.
2.
Remove safety valve cover and remove the safety valve diaphragm assembly.
Safety valve cover
Safety valve diaphragm
6-18
6.2.25 Remove the Safety Valve Seat Assembly
1.
Do as the step described in 6.2.14Remove the Safety Valve Gas Reservoir Assembly.
2.
Do as the step described in 6.2.20Remove the Safety Valve Assembly.
3.
Disconnect the connecting hose.
4.
Remove the four screws fixing the safety valve seat assembly and remove the safety
valve seat assembly.
6.2.26 Remove the Gas Reservoir Assembly
1.
Do as the step described in 6.2.25Remove the Safety Valve Seat Assembly.
2.
Remove the six screws fixing the sheet metal for safety valve assembly and remove the
gas reservoir assembly.
6-19
6.2.27 Remove the O2 Sensor Transitional Part
1.
Do as the step described in 6.2.26Remove the Gas Reservoir Assembly.
2.
Pry up the O2 sensor press plate for O2 sensor transitional part. Take out the O2 sensor
transitional par.
O2 sensor transitional part
O2 sensor
press plate
6.2.28 Remove VT50 Expiration Module Board PCBA
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the VT50 expiration module board PCBA.
3.
Remove the four screws fixing the VT50 expiration module board PCBA. Take out the
VT50 expiration module board PCBA.
6-20
6.2.29 Remove VT50 Heating Plate Assembly
1.
Remove the kernel assembly following 6.2.9 or 6.2.10.
2.
Remove the four screws fixing the heating plate fixed plate. Take out the fixed plate.
3.
Disconnect the relevant cable and remove the VT50 heating plate assembly.
Screw
VT50 heating plate assembly
6-21
6.2.30 Remove the Three-Way Valve Assembly
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the three-way vale assembly.
3.
Remove the two screws fixing the three-way valve assembly and remove the three-way
valve assembly.
Three-way valve assembly
6.2.31 Remove the Expiratory Flow Sensor Seat Assembly
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the expiratory flow sensor seat assembly.
3.
Remove the two screws. Remove the expiratory flow sensor seat assembly.
Expiratory flow
sensor seat assembly
6-22
6.2.32 Remove the Three-way Valve and Connection Line
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the three-way valve connection line.
3.
Remove the two screws and remove the three-way vale and connection line.
Three-way vale
and connection
line
6.2.33 Remove VT50 Expiration Valve and Connection Line
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the expiration valve connection line.
3.
Remove the two screws and remove the expiration valve and connection line.
Expiration valve and
connection line
6-23
6.2.34 Remove the Muffler
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Remove the muffler with wrench.
6.2.35 Remove the PEEP Valve Seat Assembly
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Disconnect the hoses and cables connecting the PEEP valve seat assembly.
3.
Remove the six screws and remove the PEEP valve seat assembly.
PEEP valve seat assembly
6-24
6.2.36 Remove the Expiration Valve Locking Bar
1.
Do as the step described in 6.2.12Remove the Expiration Valve Seat Assembly.
2.
Remove the two screws and remove the expiration valve locking bar.
Expiration valve locking bar
6-25
6.2.37 Remove VT50 Display Front Housing Assembly
1.
Loosen the two screws fixing the display cable connector from the main unit. Unplug
the display cable connector.
2.
Open the wire-wound cover on the display rear housing. Unwind the twisting display
cable.
3.
Remove the eight screws fixing the front and rear housings. Separate the display front
housing assembly from the bottom.
Unwind the twisting cable
Display cable connector
4.
Remove the display cable connector from the display front housing assembly. Remove
the screw fixing the display cable and pull out the display front housing assembly (this
step is not performed if LCD is not to be replaced).
5.
When re-assembling, wind the display cable counterclockwise as per the arrow shown
on the rear housing.
6-26
6.2.38 Remove VT30 Display Front Housing Assembly
1.
Remove the four screws fixing the front and rear housings. Separate the display front
housing assembly from the bottom.
2.
Remove the display cable connector from the display front housing assembly. Pull out
the display front housing assembly (this step is not performed if LCD is not to be
replaced).
AU display
LG display
6-27
6.2.39 Remove the Key Main Board
1.
Remove the display front housing assembly following 6.2.37 or 6.2.38.
2.
Disconnect the cables connecting the key main board.
3.
Remove the seven screws fixing the key main board and remove the key main board.
VT30 display front housing assembly
VT50 display front housing assembly
6-28
6.2.40 Remove the Speaker
1.
Remove the display front housing assembly following 6.2.37 or 6.2.38.
2.
Disconnect the cables connecting the speaker.
3.
Remove the two screws fixing the speaker and remove the speaker.
VT30 display front housing assembly
VT50 display front housing assembly
6-29
Speaker cable leading-out position
VT50 display speaker cable leading-out mode
VT30 display speaker cable leading-out mode
4.
When assembling the VT50 display assembly, wind the speaker and its connection line
around the bolt which fixes the speaker counterclockwise for one circle and then insert
them into the key control board.
5.
When assembling the VT30 display assembly, wind the speaker connection line around
the speaker counterclockwise for two circles and then insert it into the key control board.
6.2.41 Remove the Inverter
1.
Remove the display front housing assembly following 6.2.37 or 6.2.38.
2.
Disconnect the cables connecting the inverter.
3.
Remove the two screws fixing the inverter and remove the inverter.
VT30 display front housing assembly
6-30
VT50 display front housing assembly
6.2.42 Remove the Alarm Lamp Board
1.
Remove the display front housing assembly following 6.2.37 or 6.2.38.
2.
Disconnect the cables connecting the alarm lamp board.
3.
Remove the two screws fixing the alarm lamp board and remove the alarm lamp board.
VT30 display front housing assembly
6-31
VT50 display front housing assembly
6.2.43 Remove the Display Bracket Assembly
1.
Remove the display front housing assembly following 6.2.37 or 6.2.38.
2.
Disconnect the encoder connection line, power switch connection line, and connection
lines for left and right key boards.
3.
Remove the five screws fixing the display bracket assembly and remove the display
bracket assembly.
VT30 display front housing assembly
6-32
VT50 display front housing assembly
6.2.44 Remove VT50 Key Scanning Board PCBA
1.
Do as the step described in 6.2.43Remove the Display Bracket Assembly.
2.
Remove the eight screws fixing the key scanning boards (four screws for each board)
and remove the left and right VT50 key scanning board PCBAs.
VT50 key scanning
board (right) PCBA
VT50 key scanning
board (left) PCBA
VT30 display front housing assembly
6-33
VT50 key scanning
board (right) PCBA
VT50 key scanning
board (left) PCBA
VT50 display front housing assembly
6.2.45 Remove VT50 Power Switch Board PCBA
1.
Do as the step described in 6.2.43Remove the Display Bracket Assembly.
2.
Remove the two screws fixing the power switch board and remove the VT50 power
switch board PCBA.
6-34
6.2.46 Remove the Copper Axis Encoder Board
1.
Do as the step described in 6.2.43Remove the Display Bracket Assembly.
2.
Remove the two screws fixing the encoder mounting plate. Remove the copper axis
encoder board and encoder mounting plate.
6.2.47 Remove the Touchscreen
1.
Do as the step described in 6.2.44Remove VT50 Key Scanning Board PCBA.
2.
Remove VT50 key scanning board (left) PCBA and remove the touchscreen.
Touchscreen
6-35
6.2.48 Remove the Display
1.
Do as the step described in 6.2.43Remove the Display Bracket Assembly.
2.
Remove the four screws fixing the display.
3.
Disconnect the relevant cable and remove the display.
12.1" display
10.4" display (AU)
6-36
10.4" display (LG)
6.2.49 Remove the Main Unit Handle
Remove the four screws fixing the main unit handle. Remove the handle and handle
connection post.
VT50 enclosure
VT30 enclosure
6-37
6.2.50 Remove the Filter Water Trap at Gas Supply Inlet
Remove the filter water trap from the main unit. Pay attention to the sealing ring on the water
trap. When re-assembling, install the water trap, which is same for VT50 and VT30.
Filter water trap
6-38
6.2.51 Remove the Auxiliary Output Assembly
Remove the six screws fixing the auxiliary output assembly from the cart. Remove the
auxiliary output assembly.
Auxiliary output assembly
6-39
6.2.52 Replace the Fuse
Loosen the fuse cover with flathead screwdriver (the fuse cover will pop up automatically).
Remove the fuse after the fuse cover pops up. After replacing with a new fuse, tighten the
cover onto the fuse holder.
In case of fuse for power socket, pry up the fuse cover with flathead screwdriver and press
the fuse cover in after replacing the fuse.
Pry up fuse cover
Fuse for power socket
6.2.53 Remove the Humidifier Bracket Assembly
1.
Pry up the two screw plugs from the cart column.
2.
Remove the two screws fixing the humidifier bracket assembly.
3.
Remove the humidifier bracket assembly.
6-40
6.2.54 Remove the Casters
1.
Lay down the cart onto the ground.
2.
Remove the caster screw bolts with wrench.
3.
Remove the caster
6.2.55 Remove the Cart Base, Upright Post, and Panel
1.
2.
3.
Lay down the cart onto the ground. Note to keep the cart in good appearance.
Remove the 12 screws fixing the cart upright post.
Separate the cart base, upright post, and panel assembly.
When assembling the cart, put cart packaging foam to the upright post assembly to assemble
the base, panel, and upright post. Fix the cart with 12 screws.
Panel assembly
Upright post assembly
6-41
Base assembly
FOR YOUR NOTES
6-42
7 Electrical and Pneumatic Connections
7.1 Pneumatic Connections
7.1.1 Pneumatic Connection Diagram
7-1
7.1.2 Tubing
No.
Name
Diameter
Qty. for
a single
machine
Affiliated
assembly
Length
(mm )
P/N
Silicone
tube
Silicone
tube
Expiration valve
seat assembly
Silicone
tube
1
Silicone
tube
Silicone
tube
2
3
4
5
7
5.6×2.4
A21-000007---
Silicone
tube
Gas supply control
assembly
Silicone
tube
Safety valve
reservoir assembly
Silicone
tube
Expiration valve
seat assembly
1
130±5
PU tube
Expiration valve
seat assembly
1
80±5
Gas supply control
assembly
1
240±5
2
80±5
PU tube
4×2.5
PU tube
Expiration valve
seat assembly
PU tube
Expiration valve
seat assembly
6×4
PU tube
6
80±5
PU tube
PU tube
M6G-020046---
M6G-020026---
Gas supply control
assembly
3
95±5
7
Silicone
tube
5.6×2.4
Expiration valve
seat assembly
1
30±3
A21-000007---
8
Silicone
tube
5.6×2.4
Expiration valve
seat assembly
1
80±5
A21-000007---
3
10±2
M6G-020046---
Expiration valve
seat assembly
9
Transitional
tube
4×2.5
Expiration valve
seat assembly
Gas supply control
assembly
7-2
No.
Name
Diameter
Affiliated
assembly
Qty. for
a single
machine
Length
(mm )
P/N
3
35±3
A21-000007---
Expiration valve
seat assembly
10
Silicone
tube
5.6×2.4
Expiration valve
seat assembly
Gas supply control
assembly
7.2 Electrical Connections
7.2.1 Electrical Connection A (main unit)
Electrical connection diagram
7-3
Notes:

Hollow arrows indicate connections through board-to-board connectors while solid
arrows indicate connections through cables.

“Bxx” represents self-made boards and “Sxx” purchased materials. In Bxx/Bxx, the first
Bxx stands for E3/B3 and the second Bxx for E5/B5. In Sxx/Sxx, the first Sxx stands for
E3/B3 and the second Sxx for E5/B5.

“#xx” represents cable.

For E3/B3 ventilator, B3 is connected to B11 and S3 directly through #6, as shown by
the broken lines in the above diagram. For E5/B5 ventilator, B3 is connected to B11 and
S4 through #5 and #7 after they are interconnected, as shown by the real lines in the
above diagram.

For E3/B3 ventilator, S5 is connected to S3 through #8. For E5/B5 ventilator, S6 is
connected to S4 directly through the accompanying cable.

For E3/B3 ventilator, B11 is connnected to B8 and B12 through #12. For E5/B5
ventilator, B11 is connected to B8 through #13 and to B12 through #16.
Wiring
S/N
Description
P/N
#1
VT50 AC-DC board AC input line
009-000639-00
#2
VT50 AC-DC board DC input line
009-000635-00
#3
Fan connection line
/
#4
Connection line for VT50 inspiratory connector board
009-000614-00
#5
VT50 main unit internal UI connection line
009-000627-00
#6
Vt50 display cable 10.4" AU screen
009-000625-00
#7
Vt50 display cable 12.1" AU screen
009-000626-00
#8
Connection line for TFT display backlight board
8000-21-10239
#9
Input line for VT50 10.4" display inverter
009-000633-00
#10
Input line for VT50 12.1" display inverter
009-000634-00
#11
Connection line for VT50 encoder board
009-000631-00
#12
Connection line for VT30 key board
009-001105-00
#13
Connection line for VT50 key board (right)
009-000629-00
#14
Speaker connection line
/
#15
Connection line for VT50 alarm lamp board
009-000632-00
#16
Connection line for VT50 key board (left)
009-000628-00
Touchscreen (10.4") connection line
/
Touchscreen (12.1") connection line
/
#18
Connection line for VT50 power switch board
009-000630-00
B1
VT50 AC-DC power board PCBA
051-000152-00
B2
VT50 DC-DC power board PCBA
051-000153-00
#17
7-4
S/N
Description
P/N
B3
VT50 motherboard PCBA
051-000163-00
B4
VT30 monitoring board PCBA
051-000632-00
B5
VT50 monitoring board PCBA
051-000160-00
B6
VT50 extension board PCBA
051-000311-00
B7
VT50 main control board PCBA
051-000139-00
B8
VT50 key scanning board (right) PCBA
051-000180-00
B9
Copper axis encoder board
0010-30-43089
B10
VT50 alarm lamp board PCBA
051-000182-00
B11
VT50 key control board PCBA
051-000178-00
B12
VT50 key scanning board (left) PCBA
051-000179-00
B13
VT50 power switch board PCBA
051-000181-00
S1
Fan (U60T12MGA7-57)
024-000102-00
S2
Lithium battery
022-000008-00
S3
TFT LCD (10.4")
0010-10-12357
S4
TFT LCD (12.1")
0010-10-42633
S5
Inverter (used together with 10.4" screen)
0000-10-11020
S6
Inverter (used together with 12.1" screen)
022-000001-00
S7
Speaker
9200-21-10633
S8
Touchscreen (10.4")
0000-10-11086
S9
Touchscreen (12.1")
0000-10-10799
Notes:

Fan “S1” is purchased material. The incoming material already has connection line
“#3”.

Fan “S7” is purchased material. The incoming material already has connection line
“#14”.

Touchscreen “S8/S9” is purchased material. The incoming material already has
connection line “#17”.

The BOM of “B10” already contains “#15”.
7.2.2 Electrical Connection B (auxiliary output assembly)
Electrical connection diagram
7-5
Notes:

Solid arrows indicate connections through cables.

“Sxx” represents purchased material.

“#xx” represents cable.

The connection line between “S11” and “S12” is related to the power supply standards
for China, Europe, Britain etc. “S12” already contains the cable under some standards.
Therefore, the cable number is not given in the above diagram.
Wiring
S/N
Description
P/N
#19
VT50 auxiliary output cable
009-000647-00
#20
VT50 main unit power cable
009-000624-00
S10
AC power put line (including Chinese, European, and British
standards)
/
S11
Fuse (related to the power supply standards for China, Europe,
Britain etc.)
/
S12
Auxiliary electrical outlet (including Chinese, European, and
British standards)
/
7.2.3 Electrical Connection C (Inspiratory connector assembly)
Electrical connection diagram
7-6
Notes:

Solid arrows indicate connections through cables.

“Bxx” represents self-made boards and “Sxx” purchased materials.

“#xx” represents cable.
Wiring
S/N
Description
P/N
#21
Connection line for VT50 gas supply pressure switch
009-000615-00
Connection line for VT50 inspiration valve
009-000616-00
Proportional valve connection line
009-001502-00
#23
Connection line for VT50 safety valve
009-000617-00
#24
Connection line for VT50 three-way valve
009-000618-00
#25
Connection line for VT50 nebulization valve
009-000619-00
#26
Connection line for VT50 inspiratory flow sensor
009-000620-00
#27
Connection line for VT50 MOX-3 O2 cell
009-002591-00
B14
VT50 inspiration module board PCBA
051-000161-00
S13
O2 supply pressure switch
/
S14
Air supply pressure switch
/
S15
O2 inspiration valve
/
S16
Air inspiration valve
/
S17
Safety valve
/
S18
Three-way valve
/
S19
Nebulization valve (two-way valve)
/
S20
Three-way valve for Air and O2 switchover
/
S21
O2 inspiratory flow sensor
/
S22
Air inspiratory flow sensor
/
S23
O2 cell MOX-3
040-001275-00
#22
Notes:
For E3/B3 ventilator, “#22” is “009-000616-00”. For E5/B5, “#22” is “009-001502-00”.
7-7
7.2.4 Electrical Connection D (Expiratory connector assembly)
Electrical connection diagram
Notes:

Hollow arrows indicate connections through board-to-board connectors while solid
arrows indicate connections through cables.

“Bxx” represents self-made boards and “Sxx” purchased or outsourcing materials.

“#xx” represents cable.
Wiring
S/N
Description
P/N
#28
Connection line for VT50 expiration valve
009-000622-00
#29
Heating plate connection line
/
B15
VT50 expiration module board PCBA
051-000162-00
S24
Expiration valve (PEEP proportional valve)
/
S25
VT50 heating plate assembly
024-000087-00
S26
Three-way valve
/
Notes:
Heating plate “S25” is purchased material. The incoming material already has connection line
“#29”.
7-8
8 Parts
8.1 E3 Ventilator Main Unit Assembly
8.1.1 Exploded View
8.1.2 Parts List
Note: The P/N of this assembly is 115-003793-00.
S/N
P/N
Description
Qty
1
M04-004015---
Cross recessed pan head screw with washer M3X8
12
2
115-003762-00
E3 display front housing assembly
1
3
115-003797-00
E3 display rear housing assembly
1
4
115-004524-00
Expiration Valve Assembly (E3/E5)
1
5
115-003798-00
E3 main unit enclosure assembly
1
6
115-003794-00
E3 ventilator kernel assembly
1
8-1
8.2 E5 Ventilator Main Unit Assembly
8.2.1 Exploded View
8.2.2 Parts List
Note: The P/N of this assembly is 115-003799-00.
S/N
P/N
Description
Qty
1
115-003802-00
Main unit enclosure assembly (VT50)
1
2
115-003800-00
Ventilator kernel assembly (VT50)
1
3
115-004524-00
Expiration Valve Assembly (E3/E5)
1
4
M04-004015---
Cross recessed pan head screw with washer M3X8
4
8-2
8.3 E3 Ventilator Kernel Assembly
8.3.1 Exploded View
8.3.2 Parts List
Note: The P/N of this assembly is 115-003794-00.
S/N
P/N
Description
Qty
1
115-003795-00
E3 ventilator rack Assembly
1
2
115-003792-00
Inspiration module assembly
1
3
115-003791-00
Expiration module
1
4
115-003787-00
Ventilator power Assembly
1
5
M04-004015---
Cross recessed pan head screw with washer M3X8
11
6
009-000614-00
Connection line for VT50 inspiratory connector board
1
8-3
8.4 E5 Ventilator Kernel Assembly
8.4.1 Exploded View
8.4.2 Parts List
Note: The P/N of this assembly is 115-003800-00.
S/N
P/N
Description
Qty
1
115-003801-00
E5 ventilator rack Assembly
1
2
115-003791-00
Expiration module
1
3
009-000614-00
Connection line for VT50 inspiratory connector board
1
4
115-003792-00
Inspiration module assembly
1
5
M04-004015---
Cross recessed pan head screw with washer M3X8
11
6
115-003787-00
Ventilator power Assembly
1
8-4
8.5 E3 Ventilator Rack Assembly
8.5.1 Exploded View
8.5.2 Parts List
Note: The P/N of this assembly is 115-003795-00.
S/N
P/N
Description
Qty
1
042-001083-00
E3 main unit rack
1
2
099-000078-00
PCB guide rail RBE-127 primary color nylon 66
3
3
051-000163-00
Motherboard
1
4
051-000160-00
Monitoring board
1
5
051-000311-00
Extension board
1
6
051-000139-00
Main control board
1
7
M05-010002-06
Lithium battery 11.1V4500mAh
2
8
034-000088-00
PCB disassembling tool
1
9
047-004728-00
Cushion for PCB disassembling tool
1
10
042-001073-00
Rear cover for module rack
1
11
047-001349-00
Air filter for module rack
1
12
024-000062-00
Conductive cushion for module rack rear cover
1
13
M04-004015---
Cross recessed pan head screw with washer M3X8
10
14
047-003426-00
Sealing cushion for ventilator motherboard
1
8-5
8.6 E5 Ventilator Rack Assembly
8.6.1 Exploded View
8.6.2 Parts List
Note: The P/N of this assembly is 115-003801-00.
S/N
P/N
Description
Qty
1
042-001098-00
E5 main unit rack
1
2
099-000078-00
PCB guide rail RBE-127 primary color nylon 66
3
3
051-000163-00
Motherboard
1
4
051-000160-00
Monitoring board
1
5
051-000311-00
Extension board
1
6
051-000139-00
Main control board
1
7
M05-010002-06
Lithium battery 11.1V4500mAh
2
8
034-000088-00
PCB disassembling tool
1
9
047-004728-00
Cushion for PCB disassembling tool
1
10
042-001073-00
Rear cover for module rack
1
11
047-001349-00
Air filter for module rack
1
12
024-000062-00
Conductive cushion for module rack rear cover
1
13
M04-004015---
Cross recessed pan head screw with washer M3X8
10
14
047-003426-00
Sealing cushion for ventilator motherboard
1
15
009-000627-00
VT50 main unit internal UI connection line
1
8-6
8.7 Ventilator Power Assembly
8.7.1 Exploded View
8.7.2 Parts List
Note: The P/N of this assembly is 115-003787-00.
S/N
P/N
Description
Qty
1
042-001459-00
Power box main body
1
2
047-002226-00
AC-DC insulating trip
1
3
051-000152-00
AC-DC power board
1
4
M04-004015---
Cross recessed pan head screw with washerM3X8
2
5
051-000153-00
DC-DC power board
1
6
041-001359-00
M3 screw
3
7
115-003788-00
Power panel assembly
1
8
M04-005005---
Cross recessed sunk screw M3x6
7
9
042-001075-00
Power box cover
1
10
047-004038-00
Insulating trip for power box cover
1
8-7
8.8 E3 Display Front Housing Assembly
8.8.1 Exploded View
8-8
8.8.2 Parts List
Note: The P/N of this assembly is 115-003762-00, which is compatible with two types of
LCD display.
S/N
P/N
Description
Qty
1
043-000509-00
Front housing (VT30)
1
2
9211-20-87295
Encoder mounting plate
1
3
0010-30-43089
Copper axis encoder board
1
4
043-000504-00
Alarm lamp
1
5
047-001195-00
Up-down waterproof strip (VT30)
2
6
047-001196-00
Left-right waterproof strip (VT30)
2
7
0000-10-11086
Groovy touchscreen electric resistance 10.4" five-wire
antiglare
1
8
051-000180-00
VT50 key scanning board 2
1
9
051-000179-00
VT50 key scanning board 1
1
10
6800-20-50201
Power key
1
11
051-000181-00
VT50 system switch board
1
12
9211-20-87299
Knob
1
13
115-003763-00
E3 display assembly
1
14
043-000916-00
Key linkage plate
12
15
047-001205-00
Left key label (VT30)
1
16
047-001206-00
Right key label (VT30)
1
17
M04-003105---
Tapping screw PT3X8
10
18
M04-004015---
Cross recessed pan head screw with washer M3X8
8
8-9
8.8.3 E3 Display Assembly (configured with primary display)
8.8.3.1 Exploded View
8-10
8.8.3.2 Parts List
Note: The P/N of this assembly is 115-003763-00.
S/N
P/N
Description
Qty
1
042-001025-00
E3 display bracket
1
2
047-004734-00
Internal shading plate for VT50 alarm lamp
1
3
0010-10-12357
AU LCD display TFT10.4"
1
4
M04-000805---
Cross recessed pan head screw M2x8
4
5
047-001202-00
Stop plate (VT30)
1
6
047-001197-00
Left-right touchscreen press strip (VT30)
2
7
047-001198-00
Up-down touchscreen press strip (VT30)
2
8
047-004733-00
External shading plate for VT50 alarm lamp
1
9
043-000505-00
Light block
1
10
051-000182-00
VT50 Alarm lamp board
1
11
0000-10-11020
Inverter DC/AC12VDC500Vrms6mA
1
12
7000-20-24417
Backlight board insulating trip
1
13
M04-051137---
Cross recessed pan head screw M2x4
2
14
051-000178-00
VT50 key main board
1
15
047-001200-00
Speaker cushion 2
1
16
042-001026-00
Speaker press plate
1
17
9200-21-10633
2.25" speaker and connection line
1
18
047-001199-00
Speaker cushion 1
1
19
M04-004015---
Cross recessed pan head screw with washer M3X8
8
8-11
8.8.4 E3 Display Assembly (configured with secondary
display)
8.8.4.1 Exploded View
8-12
8.8.4.2 Parts List
Note: The P/N of this assembly is 115-003763-00.
S/N
P/N
Description
Qty
1
042-001025-00
E3 display bracket
1
2
047-004734-00
Internal shading plate for VT50 alarm lamp
1
3
0010-10-11021
LG LCD display TFT 10.4"
1
4
042-001240-00
10.4" LG display support piece 2
1
5
047-001202-00
Stop plate (VT30)
1
6
047-001197-00
Left-right touchscreen press strip (VT30)
2
7
047-001198-00
Up-down touchscreen press strip (VT30)
2
8
047-004733-00
External shading plate for VT50 alarm lamp
1
9
043-000505-00
Light block
1
10
051-000182-00
VT50 Alarm lamp board
1
11
0000-10-11020
Inverter DC/AC12VDC500Vrms6mA
1
12
7000-20-24417
Backlight board insulating trip
1
13
M04-051137---
Cross recessed pan head screw M2x4
6
14
051-000178-00
VT50 key main board
1
15
047-001200-00
Speaker cushion 2
1
16
042-001026-00
Speaker press plate
1
17
9200-21-10633
2.25" speaker and connection line
1
18
047-001199-00
Speaker cushion 1
1
19
M04-004015---
Cross recessed pan head screw with washer M3X8
12
20
042-001239-00
10.4" LG display support piece 1
1
8-13
8.9 E5 Display Assembly
8.9.1 Exploded View
8.9.2 Parts List
Note: The P/N of this assembly is 115-003757-00.
S/N
P/N
Description
Qty
1
115-003758-00
Display front housing assembly (VT50)
1
2
115-003759-00
Display rear housing assembly (VT50)
1
3
M04-004015---
Cross recessed pan head screw with washer M3X8
8
8-14
8.10 E5 Display Front Housing Assembly
8.10.1 Exploded View
8.10.2 Parts List
Note: The P/N of this assembly is 115-003758-00, which is compatible with two types of
LCD display.
S/N
P/N
Description
Qty
1
043-000503-00
Front housing (VT50)
1
2
043-000504-00
Alarm lamp
1
3
043-000916-00
Key linkage plate
12
4
047-001204-00
Right key label (VT50)
1
5
9211-20-87299
Knob
1
6
9211-20-87295
Encoder mounting plate
1
7
0010-30-43089
Copper axis encoder board
1
8
047-001203-00
Left key label (VT50)
1
9
047-001192-00
Up-down waterproof strip (VT50)
2
10
6800-20-50201
Power key
1
8-15
S/N
P/N
Description
Qty
11
047-001191-00
Left-right waterproof strip (VT50)
2
12
051-000181-00
VT50 system switch board
1
13
051-000179-00
VT50 key scanning board 1
1
14
M04-003105---
Tapping screw PT3X8
10
15
M04-004015---
Cross recessed pan head screw with washer M3X8
7
16
115-003760-00
Display assembly (VT50)
1
17
051-000180-00
VT50 key scanning board 2
1
18
0000-10-10799
Groovy touchscreen electric resistance 12.1" five-wire
1
8.10.3 E5 Display Assembly (configured with primary display)
8.10.3.1 Exploded View
8-16
8.10.3.2 Parts List
Note: The P/N of this assembly is 115-003760-00.
S/N
P/N
Description
Qty
1
042-001024-00
Display bracket (VT50)
1
2
047-004734-00
Internal shading plate for VT50 alarm lamp
1
3
0010-10-42632
LCD display TFT12.1"AU
1
4
047-001201-00
Stop plate (VT50)
1
5
6802-20-66739
Touchscreen press strip 4
2
6
6802-20-66738
Touchscreen press strip 3
2
7
M04-004015---
Cross recessed pan head screw with washer M3X8
14
8
022-000001-00
Inverter
1
9
9211-20-87387
TPI Backlight board insulating trip
1
10
043-000505-00
Light block
1
11
047-004733-00
External shading plate for VT50 alarm lamp
1
12
047-001200-00
Speaker cushion 2
1
13
051-000182-00
VT50 Alarm lamp board
1
14
9200-21-10633
2.25" speaker and connection line
1
15
042-001026-00
Speaker press plate
1
16
047-001199-00
Speaker cushion 1
1
17
051-000178-00
VT50 key main board
1
8-17
8.10.4 E5 Display Assembly (configured with secondary
display)
8.10.4.1 Exploded View
8.10.4.2 Parts List
Note: The P/N of this assembly is 115-003763-00.
S/N
P/N
Description
Qty
1
042-001024-00
Display bracket (VT50)
1
2
047-004734-00
Internal shading plate for VT50 alarm lamp
1
3
0000-10-11092
LG LB121S03
1
4
047-001201-00
Stop plate (VT50)
1
5
6802-20-66739
Touchscreen press strip 4
2
6
6802-20-66738
Touchscreen press strip 3
2
7
M04-004015---
Cross recessed pan head screw with washer M3X8
14
8
022-000001-00
Inverter
1
9
9211-20-87387
TPI Backlight board insulating trip
1
10
043-000505-00
Light block
1
11
047-004733-00
External shading plate for VT50 alarm lamp
1
12
047-001200-00
Speaker cushion 2
1
13
051-000182-00
VT50 Alarm lamp board
1
14
9200-21-10633
2.25" speaker and connection line
1
8-18
S/N
P/N
Description
Qty
15
042-001026-00
Speaker press plate
1
16
047-001199-00
Speaker cushion 1
1
17
051-000178-00
VT50 key main board
1
8.11 Gas Supply Control Assembly (VT30/DISS)
8.11.1 Exploded View
8-19
8.11.2 Parts List
Note: The P/N of this assembly is 115-007477-00.
S/N
P/N
Description
Qty
1
042-001569-00
Inspiration module fixing bracket
1
2
041-001536-00
Nebulizer connector
1
3
024-000101-00
SENSOR Flow Oxygen 300slpm 5VDC
1
4
024-000100-00
SENSOR Flow Air 300slpm 5VDC
1
5
041-003284-00
Nebulization pneumatic resistor
2
6
M04-004015---
Cross recessed small pan head screw with washer GB9074.5-88
M3X8 zinc plated, yellow
9
7
051-000161-00
VT50 inspiration module board PCBA
1
8
042-001069-00
Inspiratory board seat
1
9
M04-051139---
Cross recessed small pan head screw assembly GB/T9074.8
M4X12, zinc plated, yellow
5
10
115-007298-00
Ventilator pneumatic block assembly (VT30/DISS)
1
11
115-008652-00
Filter screen assembly at inspiratory port
2
12
082-000566-00
O-ring 21.2X1.8 silicone A50
2
8-20
8.12 Gas Supply Control Assembly (VT30/NIST)
8.12.1 Exploded View
8-21
8.12.2 Parts List
Note: The P/N of this assembly is 115-007478-00.
S/N
P/N
Description
Qty
1
042-001569-00
Inspiration module fixing bracket
1
2
041-001536-00
Nebulizer connector
1
3
024-000101-00
SENSOR Flow Oxygen 300slpm 5VDC
1
4
024-000100-00
SENSOR Flow Air 300slpm 5VDC
1
5
041-003284-00
Nebulization pneumatic resistor
2
6
M04-004015---
Cross recessed small pan head screw with washer GB9074.5-88
M3X8 zinc plated, yellow
9
7
051-000161-00
VT50 inspiration module board PCBA
1
8
042-001069-00
Inspiratory board seat
1
9
M04-051139---
Cross recessed small pan head screw assembly GB/T9074.8
M4X12, zinc plated, yellow
5
10
115-007296-00
Ventilator pneumatic block assembly (VT30/NIST)
1
11
115-008652-00
Filter screen assembly at inspiratory port
2
12
082-000566-00
O-ring 21.2X1.8 silicone A50
2
8-22
8.13 Gas Supply Control Assembly (VT50/DISS)
8.13.1 Exploded View
8-23
8.13.2 Parts List
Note: The P/N of this assembly is 115-007475-00.
S/N
P/N
Description
Qty
1
042-001569-00
Inspiration module fixing bracket
1
2
041-001536-00
Nebulizer connector
1
3
024-000101-00
SENSOR Flow Oxygen 300slpm 5VDC
1
4
024-000100-00
SENSOR Flow Air 300slpm 5VDC
1
5
041-003284-00
Nebulization pneumatic resistor
2
6
115-006564-00
Flow control assembly (VT50)
1
7
082-000739-00
O-ring 6.5X1.5 fluorine rubber A75 black
2
8
M04-004015---
Cross recessed small pan head screw with washer
GB9074.5-88 M3X8 zinc plated, yellow
9
9
051-000161-00
VT50 inspiration module board PCBA
1
10
042-001069-00
Inspiratory board seat
1
11
M04-051139---
Cross recessed small pan head screw assembly GB/T9074.8
M4X12, zinc plated, yellow
5
12
115-007299-00
Ventilator pneumatic block assembly (VT50/DISS)
1
13
M04-021005---
Single coil spring lock washer, normal type, GB/T93-1987 4,
zinc plated, yellow
4
14
M04-051073---
Hexagon socket cap head screw GB/T70.1-2000 M4X12 zinc
plated, yellow
4
15
115-008652-00
Filter screen assembly at inspiratory port
2
16
082-000566-00
O-ring 21.2X1.8 silicone A50
2
8-24
8.14 Gas Supply Control Assembly (VT50/NIST)
8.14.1 Exploded View
8-25
8.14.2 Parts List
Note: The P/N of this assembly is 115-007476-00.
S/N
P/N
Description
Qty
1
042-001569-00
Inspiration module fixing bracket
1
2
041-001536-00
Nebulizer connector
1
3
024-000101-00
SENSOR Flow Oxygen 300slpm 5VDC
1
4
024-000100-00
SENSOR Flow Air 300slpm 5VDC
1
5
041-003284-00
Nebulization pneumatic resistor
2
6
115-006564-00
Flow control assembly (VT50)
1
7
082-000739-00
O-ring 6.5X1.5 fluorine rubber A75 black
2
8
M04-004015---
Cross recessed small pan head screw with washer
GB9074.5-88 M3X8 zinc plated, yellow
9
9
051-000161-00
VT50 inspiration module board PCBA
1
10
042-001069-00
Inspiratory board seat
1
11
M04-051139---
Cross recessed small pan head screw assembly GB/T9074.8
M4X12, zinc plated, yellow
5
12
115-007297-00
Ventilator pneumatic block assembly (VT50/NIST)
1
13
M04-021005---
Single coil spring lock washer, normal type, GB/T93-1987 4,
zinc plated, yellow
4
14
M04-051073---
Hexagon socket cap head screw GB/T70.1-2000 M4X12 zinc
plated, yellow
4
15
115-008652-00
Filter screen assembly at inspiratory port
2
16
082-000566-00
O-ring 21.2X1.8 silicone A50
2
8-26
8.15 Flow Control Assembly (VT50)
8.15.1 Exploded View
8.15.2 Parts List
Note: The P/N of this assembly is 115-006564-00.
S/N
P/N
Description
Qty
1
M04-021005---
Single coil spring lock washer, normal type, GB/T93-1987 4,
zinc plated, yellow
4
2
M04-051073---
Hexagon socket cap head screw GB/T70.1-2000 M4X12 zinc
plated, yellow
4
3
082-000574-00
Proportional valve 1350-5102
2
4
082-000739-00
O-ring 6.5X1.5 fluorine rubber A75 black
4
5
M6Q-120036---
Plug, hexagon, 0919-00-10
2
6
M04-021063---
G1/8 nylon washer 0602 23 1020
2
7
041-002975-00
E5 inspiration valve seat
1
8-27
8.16 Safety Valve Gas Reservoir Assembly
8.16.1 Exploded View
8.16.2 Parts List
Note: The P/N of this assembly is 115-003883-00.
S/N
P/N
Description
Qty
1
115-004729-00
Gas reservoir assembly
1
2
115-004728-00
Safety valve assembly
1
3
M04-051139---
Cross recessed small pan head screw assembly GB/T9074.8
M4X12, zinc plated, yellow
4
4
115-004727-00
Safety valve seat assembly
1
5
M04-000405---
Cross recessed sunk screw GB/T819.1-2000 M3X8 zinc
plated, yellow
4
8-28
8.17 Gas Reservoir Assembly
8.17.1 Exploded View
8.17.2 Parts List
Note: The P/N of this assembly is 115-004729-00.
S/N
P/N
Description
Qty
1
040-001275-00
O2 sensor
1
2
041-002966-00
O2 sensor transitional part
1
3
M6M-010015---
O-ring 17.17X1.78 silicone A70 black
1
4
043-000555-00
Safety valve gas reservoir
1
5
042-003013-00
O2 sensor press plate
1
6
049-000082-00
Sealing cushion for safety valve gas reservoir
1
7
042-003253-00
Safety valve assembly sheet metal
1
8
M04-004015---
Cross recessed small pan head screw with washer
GB9074.5-88 M3X8 zinc plated, yellow
6
8-29
8.18 Safety Valve Assembly
8.18.1 Exploded View
8.18.2 Parts List
Note: The P/N of this assembly is 115-004728-00.
S/N
P/N
Description
Qty
1
043-000554-00
Safety valve shell
1
2
M6M-010064---
O-ring 20X2 fluorine rubber A50
1
3
115-004653-00
Safety valve cover assembly
1
4
042-003014-00
Safety valve support plate
1
5
024-000119-00
Electromagnet 12V 48ohm range 6mm
1
6
M04-004015---
Cross recessed small pan head screw with washer
GB9074.5-88 M3X8 zinc plated, yellow
6
7
033-000135-00
C-shape clamping ring
1
8
049-000081-00
Check valve diaphragm
1
9
042-001207-00
Pressure relief valve fixed plate
1
8-30
S/N
P/N
Description
Qty
10
049-000175-00
Sealing silicone part for safety valve
1
11
115-001374-00
10cmH2O pressure relief valve
1
8.19 Safety Valve Seat Assembly
8.19.1 Exploded View
8.19.2 Parts List
Note: The P/N of this assembly is 115-004727-00.
S/N
P/N
Description
Qty
1
041-001795-00
Safety valve seat
1
2
082-000533-00
Muffler G3/8,06700017
1
3
082-000566-00
O-ring 21.2X1.8 silicone A50
2
4
M04-021063---
G1/8 nylon washer 0602 23 1020
1
5
M6M-010020---
O-ring 12.42X1.78 EPT A70 black
1
6
M6Q-120036---
Plug, hexagon, 0919-00-10
1
7
M04-004015---
Cross recessed small pan head screw with washer
GB9074.5-88 M3X8 zinc plated, yellow
2
8
041-002967-00
Plug for pressure relief valve
1
9
115-008960-00
11kPa pressure relief valve
2
10
M04-051094---
Stainless steel hexagon socket cap head screw GB/T70.1-2000
M3X16 passivation
2
11
082-000304-00
Valve, three-way valve, 12VDC, Air, normally ON
1
8-31
8.20 Expiration Module (E3/E5)
8.20.1 Exploded View
8.20.2 Parts List
Note: The P/N of this assembly is 115-007524-00.
S/N
P/N
Description
Qty
1
115-004524-00
Expiration valve assembly (E3/E5)
1
2
115-003791-00
Expiration valve seat assembly
1
8-32
8.21 Expiration Valve Assembly (E3/E5)
8.21.1 Exploded View
8.21.2 Parts List
Note: The P/N of this assembly is 115-004524-00.
S/N
P/N
Description
Qty
1
043-000551-00
Water trap
1
2
115-009283-00
Check valve assembly
1
3
M6M-010032---
O-ring 18X2.5 silicone red A50
1
4
043-000552-00
Expiration valve elbow pipe
1
5
M6M-010058---
O-ring 16X2 fluorine rubber A50
1
6
043-000532-00
Expiration module door
1
7
115-005288-00
Expiration valve flow sensor assembly
1
8
049-000081-00
Check valve diaphragm
1
9
043-000550-00
Expiration valve
1
8-33
S/N
P/N
Description
Qty
10
049-000083-00
Expiration valve upper diaphragm
1
11
041-001415-00
Expiration valve diaphragm support part
1
12
049-000066-00
Expiration valve lower diaphragm
1
13
082-000565-00
O-ring 31.47X1.78 silicone A50 red
1
14
043-000553-00
Expiration valve cover
1
8.22 Expiration Valve Flow Sensor Assembly
8.22.1 Exploded View
8.22.2 Parts List
Note: The P/N of this assembly is 115-005288-00.
S/N
P/N
Description
Qty
1
043-000733-00
Front end of expiration valve flow sensor
1
2
043-000776-00
Flow sensor bent pipe
1
3
0601-20-69702
Flow sensor diaphragm
1
4
043-000734-00
Rear end of expiration valve flow sensor
1
5
043-000985-00
Flow sensor filter
1
6
M6M-010016---
O-ring 23.60X2.65 silicone A70 red
3
8-34
8.23 Expiration Valve Seat Assembly
8.23.1 Exploded View
8-35
8.23.2 Parts List
Note: The P/N of this assembly is 115-003791-00.
S/N
P/N
Description
Qty
1
041-001359-00
M3 screw
8
2
042-001079-00
Expiration module fixing bracket
1
3
M04-004015---
Cross recessed pan head screw with washer
M3X8
10
4
051-000162-00
VT50 expiration module board PCBA
1
5
082-000453-00
Connector, tee
1
6
082-000571-00
Valve, metal needle valve, applicable to
ID.1/8'' tube
1
7
115-003885-00
Three-way valve assembly
1
8
041-002290-00
Lock rod fixed seat
1
9
033-000054-00
Expiration valve latch spring
1
10
041-001670-00
Expiration valve lock rod
1
11
047-001351-00
Fixed plate for expiration valve shell heating
plate
1
12
M90-100030---
Connector, Y,200Barb,1/8"ID,White Nylon
2
13
024-000087-00
VT50 heating plate assembly
1
14
045-000223-00
Expiration valve heat conductive cushion 1
1
15
041-003317-00
Expiration valve shell assembly
1
16
115-005336-00
Expiratory flow sensor seat assembly
1
17
041-002291-00
Expiration valve thermal baffle
2
18
115-006751-00
PEEP valve seat assembly
1
M04-051139---
Cross recessed small pan head screw
assembly GB/T9074.8 M4X12, zinc plated,
yellow
4
19
8-36
8.24 Three-way Valve Assembly
8.24.1 Exploded View
8.24.2 Parts List
Note: The P/N of this assembly is 115-003885-00.
S/N
P/N
Description
Qty
1
041-001414-00
Three-way valve seat
1
2
082-000739-00
O-ring 6.5X1.5 fluorine rubber A75 black
2
3
M90-100060---
Connector.Thread,10-32UNF,1/4"Hex,1/8"ID
2
4
M04-051094---
Stainless steel hexagon socket cap head screw GB/T70.1-2000
M3X16 passivation
2
5
082-000304-00
Valve, three-way valve, 12VDC, Air, permanently ON
1
8-37
8.25 Expiratory Flow Sensor Seat Assembly
8.25.1 Exploded View
8.25.2 Parts List
Note: The P/N of this assembly is 115-005336-00.
S/N
P/N
Description
Qty
1
M90-100060---
Connector.Thread,10-32UNF,1/4"Hex,1/8"ID
2
2
041-002973-00
Expiratory flow sensor seat
1
3
082-000739-00
O-ring 6.5X1.5 fluorine rubber A75 black
2
8-38
8.26 PEEP Valve Seat Assembly
8.26.1 Exploded View
8.26.2 Parts List
Note: The P/N of this assembly is 115-006751-00.
S/N
P/N
Description
Qty
1
M04-051094---
Stainless steel hexagon socket cap head screw GB/T70.1-2000
M3X16 passivation
2
2
082-000575-00
Proportional valve VSONC-5S11-VAF0
1
3
M6M-010045---
O-ring 2.5X1 EPT A50 black
2
4
M6Q-030015---
Straight connector 3175-06-10
1
5
M6Q-030014---
Straight connector 3175-04-10
1
6
041-002974-00
PEEP valve seat
1
7
M04-021062---
M5 nylon washer 0602 29 93 15
2
8
M04-051144---
Hexagon socket cap head screw GB/T70.1-2000 M5X6 zinc
plated, yellow
2
9
082-000532-00
Muffler.G1/4,06700013
1
10
047-003881-00
PEEP valve muffler gasket
1
8-39
FOR YOUR NOTES
8-40
P/N: 046-000997-00(5.0)