SERVICE MANUAL
ELECTROSURGICAL UNIT
REF 900-400 from V2.1.0
ARC 400
4
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
900-400_SM_V2.1.0_11747-S0-20160601-EN
Service Manual ARC 400
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Key
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Service Manual ARC 400
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6
Key
8
Front of ARC 400
1
3
2
1
Connection socket 1 for monopolar instruments that can be
switched by hand and foot. Possible connection configurations
are 3-pin, 4mm, Bovie or optional ERBE monopolar connections.
2
Connection socket 2 for monopolar instruments that can be
switched by hand and foot. Possible connection configurations
are 3-pin, 4mm, Bovie or optional ERBE monopolar connections.
3
Connection socket 3 for bipolar instruments with US 2-pin type
connectors
4
Connection socket 4 for bipolar instruments with US 2-pin type
connectors or 2 x ERBE bipolar connectors
5
Socket for the neutral electrode (NE)
6
Activation indicator, socket 1
“Monopolar Cut” (yellow) / “Monopolar Coag” (blue)
7
Activation indicator, socket 2
“Monopolar Cut” (yellow) / “Monopolar Coag” (blue)
8
Activation indicator, socket 3
“Bipolar Cut” (yellow) / “Bipolar Coag” (blue)
9
Activation indicator, socket 4
“Bipolar Cut” (yellow) / “Bipolar Coag” (blue)
10
On/Off button with light ring (orange)
11
TFT display with touch function
4
5
10
9
7
12
14
15
16
17
Back of ARC 400
25
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19
20
21
22
23
24
Service Manual ARC 400
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7
12
13
Right speaker
Left speaker
14
Connection socket 1 for footswitch
15
Connection socket 2 for footswitch
16
Connection for potential equalisation
17
Mains connection for IEC connector
18
19
Fibre optic cable signal input socket
Fibre optic cable signal output socket
20
LAN network connection (without function)
21
USB port
22
23
Audio Line IN socket (without function)
CAN / UART communication interface
24
25
Power switch
Rating plate
Table of Contents
Table of Contents
Table of Contents
1.
Using this Service Manual ............................................................................................12
1.1.
Revision number ...............................................................................................12
1.2.
Validity...............................................................................................................12
1.3.
Other applicable documents ..............................................................................13
1.4.
Symbols and markings ......................................................................................13
1.4.1.
Structure of warnings ...........................................................................13
1.4.2.
Risk levels in warnings.........................................................................13
1.4.3.
Information ...........................................................................................14
1.4.4.
Other symbols and markings ...............................................................14
1.4.5.
Symbols for monopolar CUT / COAG modes .......................................15
1.4.6.
Symbols for bipolar CUT / COAG modes .............................................16
1.4.7.
Navigation icons ..................................................................................17
1.4.8.
Argon icons ..........................................................................................17
1.4.9.
EASY Icons / Buttons...........................................................................18
1.4.10. CUT footswitch icons / buttons .............................................................19
1.4.11. COAG footswitch icons / buttons..........................................................19
2.
3.
Safety information for service technicians .................................................................20
2.1.
Safety information .............................................................................................20
2.2.
Warnings and safety instructions .......................................................................20
2.2.1.
General instructions .............................................................................20
2.2.2.
Special instructions ..............................................................................21
2.2.3.
Working with the unit switched on ........................................................21
2.2.4.
Working with the unit switched off ........................................................22
Design and operating principle ....................................................................................23
3.1.
3.2.
Power board (70464) .........................................................................................24
3.1.1.
Power rectifier ......................................................................................26
3.1.2.
Power supply unit (PSU) ......................................................................27
3.1.4.
Generator ............................................................................................28
3.1.5.
Control electronics ...............................................................................30
Control board (70325) .......................................................................................31
3.2.1.
EASY sensor .......................................................................................33
3.2.2.
Fingerswitch electronics .......................................................................33
3.2.3.
Arc sensor ...........................................................................................33
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Table of Contents
3.3.
4.
Current and voltage sensors ................................................................34
3.2.5.
Power board interface ..........................................................................34
3.2.6.
µ-processor..........................................................................................35
3.2.7.
Extra-low voltage supply ......................................................................36
3.2.8.
Footswitch interface .............................................................................36
Complete front panel unit (70357/70359)...........................................................37
3.3.1.
DCU board (70327) (Display Control Unit) ...........................................39
3.3.2.
RFID boards (Radio Frequency Identification) .....................................41
3.4.
Extra-low voltage power supply unit (10971) .....................................................42
3.5.
Interface board (70204) .....................................................................................43
3.6.
Socket switch board (70326) .............................................................................44
3.7.
Footswitch board (70493) ..................................................................................46
ARC 400 software update .............................................................................................47
4.1.
5.
3.2.4.
Instructions for software update .........................................................................47
Maintenance ..................................................................................................................51
5.1.
Technical safety inspection (TSI) .......................................................................51
5.1.1.
6.
Problem solving ............................................................................................................52
6.1.
Functional test of boards ...................................................................................52
6.1.1.
6.2.
7.
Dealing with a board fault.....................................................................52
Information messages displayed on the electrosurgical unit ..............................53
6.2.1.
Procedure to be followed when information messages appear ............53
6.2.2.
Overview of information messages and the procedure for
rectifying faults .....................................................................................54
6.3.
Reading out the fault memory ............................................................................57
6.4.
Troubleshooting .................................................................................................60
6.4.1.
Dealing with a board fault.....................................................................60
6.4.2.
Start-up faults ......................................................................................60
6.4.3.
Display faults .......................................................................................62
6.4.4.
Voltage generation faults .....................................................................63
6.4.5.
Interference to other equipment ...........................................................63
Repairs...........................................................................................................................64
7.1.
Repair on site ....................................................................................................64
7.1.1.
7.2.
10
Carrying out the TSI .............................................................................51
Ordering of spares ...............................................................................64
Repair in the factory ..........................................................................................65
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Table of Contents
7.2.1.
8.
Warranty / Defects report .....................................................................66
Removal and installation of parts ................................................................................66
8.1.
Mains fuse .........................................................................................................67
8.2.
Opening / closing the electrosurgical unit ..........................................................68
8.3.
Power board ......................................................................................................69
8.4.
Extra-low voltage power supply unit ..................................................................71
8.5.
Control board.....................................................................................................72
8.6.
Socket switch board ..........................................................................................74
8.7.
Interface board ..................................................................................................76
8.8.
Footswitch board ...............................................................................................78
8.9.
Potential equalisation connection ......................................................................79
8.10.
Connector socket / Mains filter...........................................................................80
9.
Parts list .........................................................................................................................81
10.
Technical specifications ...............................................................................................86
10.1.
11.
12.
Technical data for ARC 400...............................................................................86
Test instructions for TSI ...............................................................................................91
11.1.
Visual inspection ...............................................................................................91
11.2.
Electrical safety test...........................................................................................92
11.3.
Functional test ...................................................................................................98
11.4.
Activation test ..................................................................................................103
11.5.
EASY neutral electrode monitoring ..................................................................109
11.6.
Measuring the HF output power Cutting / Coagulation ....................................111
11.7.
Test devices used ...........................................................................................113
11.8.
Final steps .......................................................................................................113
Appendix .....................................................................................................................115
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1 Using this Service Manual
Using this Service Manual
1.
This Service Manual is an integral part of the product.
BOWA electronic GmbH & Co. KG will neither accept any liability
nor provide any warranty in the event of direct or consequential
damage arising as a result of non-compliance with the Service
Manual.

Carefully read through the Service Manual before using the
unit.

Keep the Service Manual in a safe place throughout the lifetime of the product.

Make sure the Service Manual is also available to service
technicians.

Pass on the Service Manual to all subsequent owners/users
of the product.

Update the Service Manual by adding supplementary information provided by the manufacturer.
1.1.
Revision number
ARC 400 unit version
Revision status
Valid from Version 2.1.0.
2016 / 06
The Revision number consists of the following:
ARC 400 unit version
V 2.1.0
ARC 400 Generation
Software version (main features)
Software version (bugs / hotfixes)
1.2.
Validity
This Service Manual applies only to the product indicated on the
title page.
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Service Manual ARC 400
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1 Using this Service Manual
1.3.
Other applicable documents

Observe the other applicable documents in the appendix or in
the other information.
Other applicable documents are:

Appendix (optional)

User Manual
1.4.
Symbols and markings
1.4.1.
Structure of warnings
SIGNAL WORD
Type, source and consequences of danger (physical injury)!

Measure for avoiding the danger.
NOTE
Type, source and consequences of danger (damage to property)!

1.4.2.
Measure for avoiding the danger.
Risk levels in warnings
Symbol Risk level
Probability of occurrence
Consequences
of noncompliance
DANGER
Immediate danger
Death, serious
physical injury
WARNING
Possible risk
Death, serious
physical injury
CAUTION
Possible risk
Minor physical
injury
NOTE
Possible risk
Damage to property
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1 Using this Service Manual
1.4.3.
Information
Additional information provided to facilitate working with the electrosurgical unit.
1.4.4.
Other symbols and markings
Symbol / Marking
Meaning

Prerequisite for an action

Action with one step
1.
Action comprising several steps
that must be carried out in a certain
order
2.
3.

Result of preceding action

List (first level)

14
List (second level)
Highlighting
Highlighting
... (see Section xxx,
p. xxx)
Cross reference
... Socket 3
Numbers in bold type (here: 3)
refer to the photos of the unit and
the corresponding key on pages 56
Service Manual ARC 400
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1 Using this Service Manual
1.4.5.
Symbols for monopolar CUT / COAG modes
Symbol
Symbol name
Symbol
Symbol name
Standard
Moderate
Micro
Forced noncutting
Dry
Forced
mixed
Argon
Forced
cutting
Resection
Spray
MetraLOOP
Argon open *
Laparoscopy
Argon flex *
GastroCut
loop
Argon flex pulse*
GastroCut
knife
Resection
Cardiac
mammaria
Cardiac thorax
SimCoag
Gastro Coag
Laparoscopy
* only available in conjunction with ARC PLUS (item no. 900-001).
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1 Using this Service Manual
1.4.6.
Symbols for bipolar CUT / COAG modes
Symbol
Symbol name
Symbol
Symbol name
No mode selected
No mode selected
Standard
Forceps
Standard
Bipolar
resection R
Forceps
Standard AUTO
Bipolar
Vaporisation R
Forceps Micro
Bipolar scissors
Forceps Forced
LIGATION L
TissueSeal
PLUS L
Bipolar scissors
Laparoscopy
Laparoscopy
Micro
Bipolar
resection R
Bipolare
Vaporisation R
SimCoag S
R
This mode is available with the Bipolar Resection option (900-395).
L
This mode is available with the LIGATION option (900-396).
This mode is available with the Bipolar SimCoag option (900-399).
S
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1 Using this Service Manual
1.4.7.
Navigation icons
Button
Description
Navigation
right/left
Button
Stepless adjustment of
power output or
effect.
Description
Navigation
up/down
Confirmation
and application
of settings
made.
Return to previous display
without applying
the changes
made.
1.4.8.
Argon icons
Icon / Button
900-400_SM_V2.1.0_11747-S0-20160601-EN
Description
Icon / Button
Description
Main bottle
empty
Spare bottle
empty
Main bottle full
Spare bottle full
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1 Using this Service Manual
1.4.9.
EASY Icons / Buttons
Icon / Button
Description
Icon / Button
Description
Split
neutral electrode
Contacting OK
One-piece
neutral electrode
Contacting OK
Split
neutral electrode
Contacting not
optimal
No one-piece
neutral electrode
detected or contacting insufficient
Split
neutral electrode
Contacting insufficient
One-piece
neutral electrode
not
connected.
Split
neutral electrode
not
connected.
Contact quality
indicator.
Split baby
neutral electrode
Contacting OK
Split baby
neutral electrode
Contacting not
optimal
Split baby
neutral electrode
Contacting insufficient
Split baby
neutral electrode
not
connected.
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1.4.10.
CUT footswitch icons / buttons
Icon / Button
1.4.11.
Description
Icon / Button
Description
Double-pedal
CUT footswitch
active
Double-pedal
CUT footswitch
not connected
Double-pedal
CUT footswitch
inactive
Footswitch deactivated
Double-pedal
footswitch for
ZAP mode
Double-pedal
footswitch for
ZAP mode not
connected
COAG footswitch icons / buttons
Icon / Button
Description
Icon / Button
Description
Double-pedal
COAG
footswitch active
Double-pedal
COAG
footswitch inactive
Single-pedal
COAG
footswitch active
Single-pedal
COAG
footswitch inactive
Single-pedal
COAG
footswitch not
connected.
Double-pedal
COAG
footswitch not
connected.
Double-pedal
footswitch for
ZAP mode
Double-pedal
footswitch for
ZAP mode not
connected
Single-pedal
footswitch for
ZAP mode
Single-pedal
footswitch for
ZAP mode not
connected
Footswitch deactivated
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2 Safety information for service technicians
Safety information for service technicians
2.
BOWA-electronic places great emphasis on safety when working
with electrosurgical units. This section contains information on:

Safety instructions

Warnings
The safety instructions in the User Manual contain information
relevant to correct handling of the electrosurgical unit.
2.1.
Safety information
Electrosurgical equipment is subject to rigorous inspections by
specially trained personnel.
Only experienced and trained personnel may work with the electrosurgical unit.
BOWA assumes that the electrosurgical unit will be maintained by
qualified or authorised personnel. Service technicians must be
trained and familiar with the basic principles, rules of maintenance
and risks posed by the electrosurgical unit in order to ensure that
patients, personnel and equipment are never put in danger.
2.2.
Warnings and safety instructions
2.2.1.
General instructions


20
Only use the electrosurgical unit until the self-test has been
performed correctly (see User Manual).
Position the electrosurgical unit safely; do not place it on top
of electrical equipment.

Do not place any objects (e.g. tools) on the electrosurgical
unit.

Avoid harmful interference effects by placing the electrosurgical unit as far away as possible from other electrical equipment.

Take suitable safety precautions before working on the electrosurgical unit, use isolating transformers, insulated tools and
materials.

Connect the accessories only to the sockets specified.

Set the activation signal volume so it is loud enough to be
heard.
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
2 Safety information for service technicians
2.2.2.
Special instructions
If necessary, the electrosurgical unit can be connected to the potential equalisation system by means of an earthing cable.

Replace sub-assemblies only with sub-assemblies of the
same type and quality.

Use antistatic containers to transport components that could
be damaged by static electricity.
2.2.3.
Working with the unit switched on
DANGER
Since the unit's components are not insulated against contact with foreign objects, there is high risk of electric shock
with potentially fatal consequences!

Work must only be carried out by qualified or authorised personnel.

Connect the electrosurgical unit directly to an earthed socket.

Do not use mains extension cables, adapters or multi-way
sockets.

Use a 1000 VA isolating transformer if you are working on the
unit when it is open.
Ensure that the electrosurgical unit and all of its accessory
parts are operated in dry conditions.
Do not touch any unprotected cables or PCBs.



Do not use any earthing straps when working on a live electrosurgical unit.
Overheated or unsuitable components and inflammable materials
pose the risk of fire or explosion.

Ensure that the electrosurgical unit has sufficient cooling.

Do not use any inflammable materials, such as anaesthetics,
gases or fluids, around the electrosurgical unit.

If accessories are overheated, remove them from the electrosurgical unit and keep them away from the unit and personnel.
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Service Manual ARC 400
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2 Safety information for service technicians
2.2.4.
Working with the unit switched off
The components are not insulated against contact with foreign
objects. There is a risk of electric shock from electrically charged
components even after the unit is switched off.

Switch off the electrosurgical unit and pull out the plug at least
5 minutes before commencing any service work.

Check for zero voltage by measuring the DC voltage between
measuring points JP8 and JP3 on the power board (see Figure 2-1)
JP8
JP3
Figure 2-1: Zero voltage measuring
points
CAUTION
Risk of injury due to electric shock!

Voltages up to 380 V DC may be present.

Set a suitable voltage range on the measuring device.

Use an electrostatic discharge wrist strap and ESD mats, in
order to prevent damage to the electronic components.
The electrosurgical unit can be damaged by incorrect use of tools
and associated materials.

Do not clean the electrosurgical unit with cleaning agents
which could cause damage or scratching.

Follow the cleaning instructions in the User Manual.
When carrying out maintenance work, also observe the warnings and safety instructions in the User Manual.

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3 Design and operating principle
Design and operating principle
3.
The electrosurgical unit consists of several sub-assemblies connected together as blocks or modules:

Power board (70324 or 70464)

Control board (70325)

Interface board (70204)


Front unit complete (70357 or 70359)
Socket switch board (70326)

Extra-low voltage power supply unit (10971)

Footswitch board (70203)
The block diagram gives an overview of the components and their
functions.
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3 Design and operating principle
3.1.
Power board (70464)
The power board contains all the circuits required to generate the
HF power output from mains-frequency current.
The power board is composed of various individual functions:
1
Power rectifier
2
Power supply unit
3
Generator
4
Control electronics
2
1
4
3
Figure 3-1: Power board (70464), viewed from component side
24
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3 Design and operating principle
The output voltages at the JP27 supply connector can be tested
on the component side via test points TP28 – TP31. In addition,
LEDs (D21 – D24) indicate the operational readiness of the voltages.
Figure 3-2: Test points/LEDs
Power supply
Test point / LED
Output voltage
TP28 / D21
+15V
TP29 / D22
+5V
TP30 / D23
-15V
TP31 / D24
+3.3V
JP 20
Earth
There are two connectors on the solder side of the power board.
The power board is connected to the control board via these plug
connectors.
1
Control line (JP26)
2
Power supply (JP27)
1
2
Figure 3-3: Power board (70464), viewed from solder side
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Service Manual ARC 400
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3 Design and operating principle
3.1.1.
Power rectifier
The power rectifier is connected via the power switch to the power
input socket with integral mains filter. The power rectifier converts
the mains voltage (AC) into two DC voltages (±160 V) for the
switch-mode power supply. The supply voltage can be set between 115 V and 230 V via a voltage selector switch (see table
below).
1
Voltage selector switch for
the mains voltage configuration
2
Mains voltage connection
Mains voltage
Switch position S1
Mains fuse to be used
100-120 V ± 10%
Position 115V
T 10A
220-240 V ± 10%
Position 240V
T 5A
1
2
Figure 3-4: Power rectifier
NOTE
Incorrect mains fuse rating may damage the unit!

26
When adjusting or changing over the voltage range, make
sure that the correct rating for the mains fuse in the mains filter is used.
Service Manual ARC 400
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3 Design and operating principle
3.1.2.
Power supply unit (PSU)
The power supply unit is a full-resonance switch-mode power
supply, with output voltage regulated by the MCU (Master Control
Unit, control electronics). It supplies output voltages between 0 V
DC and 380 V DC.
JP1
JP2
Figure 3-5: Power supply unit
The output voltage of the power supply unit can be measured at
test points
JP1 and JP2 using a multimeter. The output voltage varies depending on which mode, effect and output power are set.
CAUTION
Risk of injury due to electric shock!

The electrosurgical unit must be switched off before connecting the measuring lead.

Set a suitable voltage range on the measuring device.
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3 Design and operating principle
3.1.4.
Generator
The generator is located on the front part of the power board and
contains three separate HF generators:
1

Monopolar pulse generator
2

Monopolar sinewave generator
3
Bipolar sinewave generator.
From the DC voltage of the power supply unit (0 V–380 V DC),
these different generators create sinewave voltages of between 10
Vp and 1300 Vp or pulse voltages of up to 5000 Vp.
The sinewave voltage can be generated as a continuous or a
modulated signal.
1
Figure 3-6: Generator
2
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Service Manual ARC 400
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3 Design and operating principle
Monopolar pulse generator
This generator produces the current waveforms Forced Coag noncutting, Spray Coag and Argon Coag. These are modulated individual-pulse waveforms.
Pulse current types
No load
500 Ω load
Monopolar sinewave generator
This generator produces the current waveforms Monopolar Cut,
Moderate Coag, Forced Coag, Mammaria, Thorax, Lap and GastroCut. These can be either continuous sinewaves or modulated
sinewave packets.
Monopolar sinewave
Typical voltage waveform for Monopolar Cut and Moderate Coag
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3 Design and operating principle
GastroCut
Typical voltage waveform for GastroCut
Bipolar sinewave generator
This generator produces the Bipolar Coag current waveform. This
is a continuous sinewave.
With Forced Coag, this is modulated in addition.
Bipolar Coag
Bipolar Coag 120 W, 75 Ω load
3.1.5.
Control electronics
The control electronics on the power board are mainly responsible
for control and regulation of the power supply unit and the HF
generators.
30
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3 Design and operating principle
3.2.
Control board (70325)
The control board is composed of various functional groups:
1
EASY Sensor
2
Fingerswitch electronics
3
Arc sensor
4
Current and voltage sensors
5
Power board interface
6
µ-processor
7
Extra-low voltage power supply
8
Footswitch interface with isolated power supply
9
DCU voltage buffering

10
Regulation

11
Fingerswitch electronics bipolar
6
7
8
9
5
10
1
2
3
4
11
Figure 3-7: Control board (70325)
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3 Design and operating principle
Figure 3-8: Overview of slots on the control board
The following connections are used:
Connector
no.
Function
JP100
Right speaker
JP101
Audio connection to the DCU board [70327]
JP102
Housing fan 2
JP103
Signal transmission to the footswitch board [70203]
JP104
Signal transmission to the socket switch board [70326]
JP105
Signal transmission to the interface board [70204]
JP106
Housing fan 1
JP107
Left speaker
JP110
24VDC extra-low voltage power supply from the extra-low voltage power
supply unit [10971]
JP132
Switch signal from the ON button + power supply light ring
JP112
Signal transmission to the DCU board [70327]
JP118
24VDC extra-low voltage power supply of the DCU board [70327]
JP123
+5V/+15V/-15V extra-low voltage power supply to the power board
[70324]
JP126
Signal transmission to the power board [70324]
JP138-150; See Section 3.6 on page 44
JP161-164
32
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3 Design and operating principle
3.2.1.
EASY sensor
1
The EASY sensor measures the impedance between the surfaces
of split neutral electrodes. The EASY circuit features automatic
self-calibration. The measurement range of the EASY circuit is 0 
– 999 .
Figure 3-9: EASY sensor
3.2.2.
Fingerswitch electronics
2
The fingerswitch electronics monitor one monopolar output socket
respectively and send a corresponding activation signal to the
MCU when a fingerswitch on the connected monopolar handgrip is
pressed. Communication with the MCU is by optical coupler.
Figure 3-10: Fingerswitch electronics
3.2.3.
Arc sensor
3
The arc sensor converts the measured values of the arc intensity
into a pulse-width modulated (PWM) signal. The PWM signals are
then isolated and sent via three optical couplers to the control
board. These PWM signals can be measured at test points TP182
and TP183.
The DC/DC converter (EPC103) supplies the arc sensor with the
necessary voltage (+/- 5 V).
Figure 3-11: Arc sensor
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Service Manual ARC 400
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3 Design and operating principle
3.2.4.
Current and voltage sensors
4
The sensor system comprises the following components:
4x current sensors
(2x monopolar redundant, 2x bipolar redundant)
2x voltage sensors
(redundant for monopolar and bipolar, switchable)
Monopolar:
Two redundant current sensors are connected in series in the feed
and return line respectively, and outgoing leakage currents can
thus be measured by comparing the two values measured.
The two redundant voltage sensors are connected in parallel and
must as a rule deliver two identical measured values.
Figure 3-12:
Current & voltage sensors
Bipolar:
Two redundant current sensors are connected in series in the feed
and return line respectively, and outgoing leakage currents can
thus be measured by comparing the two values measured.
The voltage and arc sensors are switched by the monopolar sensors.
3.2.5.
Power board interface
5
The control board is connected to the power board (JP26) via a
ribbon cable (JP126). Voltage is supplied to the power board from
the control board via a 6-way supply cable (JP123).
Pinout of JP123 connector on the control board:
Pin
Voltage
1+2
+5V
3+4
GND
5
+15V
6
-15V
Figure 3-13: Interface
34
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3 Design and operating principle
3.2.6.
µ-processor
6
The µ-processor processes all sensor signals and regulates the
output parameters that have been set. The µ-processor also monitors all safety functions.
The unit's functions are controlled via the menu settings in the TFT
display. These signals are sent from the DCU board (X603) to the
µ-processor (JP112) via a 40-way ribbon cable and processed
accordingly for the purpose of activating the power board.
Figure 3-14: µ-processor
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Service Manual ARC 400
35
3 Design and operating principle
3.2.7.
Extra-low voltage supply
7
The extra-low voltage is supplied at 24 V DC from a separate
switch-mode power supply (10971). Different extra-low voltages
are generated from this input voltage. In addition, LEDs indicate
the operational readiness of these voltages.
The following output voltages are generated and indicated:
Test point /
LED
Output voltage
D108
+24V
D109
+5V
D110
+15V
D111
-15V
D112
+3.3V
D113
+3.0V
Figure 3-15: Extra-low voltage supply
3.2.8.
Footswitch interface
8
The footswitch board (70203) is connected to the control board via
the footswitch interface (JP103). Different coded footswitches can
be connected via this interface.
A DC/DC converter provides an isolated +5 V supply separately to
the isolated footswitch electronics.
Figure 3-16: Footswitch interface
36
Service Manual ARC 400
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3 Design and operating principle
3.3.
Complete front panel unit (70357/70359)
The complete front panel unit comprises the following components:
-
Touch Panel
-
TFT display
DCU board (Display Control Unit)
-
RFID board for sockets 1&2 monopolar [option]
-
RFID board for sockets 3&4 bipolar [option]
5 HF output sockets for instruments
(Monopolar 1, Monopolar 2, Bipolar 1, Bipolar 2, NE)
5 microswitches for detecting whether a cable or instrument is plugged in.
-
ON button with LED light ring
The complete front panel unit is connected to the control board
(70325) via the integrated DCU by a 40-way ribbon cable and a 2way power supply cable.
Figure 3-17: Front of complete front panel unit
Figure 3-18: Rear of complete front panel unit
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Service Manual ARC 400
37
3 Design and operating principle
The following block diagram provides an overview of the components of the front panel unit and their operating principle.
38
Service Manual ARC 400
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3 Design and operating principle
3.3.1.
DCU board (70327)
(Display Control Unit)
The DCU board is primarily responsible for controlling the display
and touchscreen handling.
The following signals and functions are also administered by the
DCU board:

Audio signals

Illumination of sockets

RFID

Connected detection

Interfaces (apart from FOC and UART)
Figure 3-19: DCU board (70327)
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Service Manual ARC 400
39
3 Design and operating principle
Figure 3-20: DCU board component side
The following connections are used:
Name of
connector
Function
LED 1&2
Control of the monopolar activation LEDs in the glass front.
LED 3&4
Control of the bipolar activation LEDs in the glass front.
RFID 1&2
Depending on unit configuration:
Instrument detection at the monopolar sockets via RFID (Radio Frequency Identification) and/or “Plug'n Cut” detection at
the monopolar connection sockets.
RFID 3&4
Depending on unit configuration:
Instrument detection at the bipolar sockets via RFID (Radio
Frequency Identification) and/or “Plug'n Cut” detection at the
monopolar connection sockets.
NE
Connected detection for the NE connection socket.
Master
Communication interface between DCU board and control
board.
USB
USB port
ETHERNET LAN interface
40
Audio
Audio connection between control board and DCU board
POWER
24V DC voltage power supply of the DCU board.
TOUCH
Interface to the Touch Controller
TFT LVDS
Interface to the TFT display
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
3 Design and operating principle
3.3.2.
RFID boards (Radio Frequency Identification)
The RFID system consists of a transponder, which is located in
the plug of the connected instrument and which contains an identifying code, together with a reading device, known as the RFID
board, for reading out this identification.
ARC 400 has two RFRID boards which read out the monopolar
and bipolar sockets respectively.
J1
J3
J2
Figure 3-21: Monopolar RFID board for sockets 1&2 (70220)
The following connections are available:
Connector
no.
Function
J1
Socket recognition for socket 1 (microswitch closer)
J2
Socket recognition for socket 2 (microswitch closer)
J3
Interface and power supply of the DCU board.
J1
J3
J2
Figure 3-22: Bipolar RFID board for sockets 3&4 (70219)
The following connections are available:
Connector no.
Function
J1
Socket recognition for socket 3 (microswitch closer)
J2
Socket recognition for socket 4 (microswitch closer)
J3
Interface and power supply of the DCU board.
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Service Manual ARC 400
41
3 Design and operating principle
3.4.
Extra-low voltage power supply unit (10971)
The extra-low voltage power supply unit supplies the required extra-low voltages to the control board.
It can accept a wide range of inputs, from 100 V to 240 V AC, from
which it produces a +24 V DC voltage.
Figure 3-23: Extra-low voltage power supply unit
1
100-240 V AC mains input (2-pin)
2
24 V DC extra-low voltage output (4-pin)
3
PE connection (6.3 mm)
4
Potentiometer for adjusting the output voltage +/-10%
4
1
2
3
Figure 3-24: Extra-low voltage power supply unit, component side
Pinout of JP110 connector on the control board:
Pin
Voltage
1+2
+24V
3+4
GND
Output parameters of extra-low voltage power supply unit
42
Voltage
Max. current
Max. output
+24 V +/-5%
4.2A
100W
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
3 Design and operating principle
3.5.
Interface board (70204)
The interface board in the ARC 400 enables communication with
external periphery equipment and the ARC PLUS Argon device.
Figure 3-25: Interface board
The following interfaces are available and are used:
Function
External
connection plug
Internal
connection plug
UART
JP3
JP9
USB
JP4
JP10
LAN
JP2
JP5
Optical inputs / outputs
O1 & O2
JP9
Figure 3-26: Interface board, component side
The internal connection sockets CAN, Line IN, USB and LAN are
connected to the DCU board (70327), where the signals are also
processed.
The connector JP9 for optical input, on the other hand, is connected to the control board (70325).
900-400_SM_V2.1.0_11747-S0-20160601-EN
Service Manual ARC 400
43
3 Design and operating principle
3.6.
Socket switch board (70326)
The socket switch board conducts the generated HF voltage to the
respective contacts of the chosen HF output socket (Monopolar/Bipolar).
The board is connected to the control board sensors and the corresponding output sockets (monopolar/bipolar).
Figure 3-27: Socket switch board
The following connections are provided on the board and are
used:
44
Connection Target
Signal
JP100
Control board connection JP104
---
JP101
Socket 3 top
BIP_3_N
JP105
Socket 3 bottom
BIP_3_P
JP124
Control board JP163
FS_BIP
JP108
Socket 4 top
BIP_4_N/4B_N
JP125
Control board JP161
FS_BIP_4
JP113
Socket 4 bottom lead white strand
BIP_4_P/4A_P
JP116
Socket 4 bottom lead black strand
BIP_4A_N
JP119
Control board JP150
BIP_AE
JP120
Control board JP149
BIP_NE
JP103
Control board JP143
MONO_AE_1
JP104
Socket 1 AE (bottom)
MONO_AE_1
JP107
Control board JP148
MONO_AE
JP109
Control board JP146
MONO_AE_2
JP110
Socket 2 AE (bottom)
MONO_AE_2
JP111
Socket 4 top
BIP_4B_P
JP112
Control board JP147
MONO_NE
JP122
Control board JP140
EASY
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3 Design and operating principle
K100
JP100
K101
JP124
JP106
K103
K104
JP125
JP110
JP108
JP111
JP107
D106
D107
D108
K102
JP109
JP105
JP104
JP101
JP103
JP102
The JP100 connection serves to provide a +15 V DC power supply
and as SPI interface, which is supplied from the control board
connector JP104.
K106
JP121
K107
JP120
JP117
JP119
JP116
K105
K108
JP122
JP112
JP113
JP114
Figure 3-28: Socket switch board, component side
The following voltages are indicated via LEDs:
Test point / LED Output voltage
D106
+3.0V
D107
+15V
D108
+5V
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Service Manual ARC 400
45
3 Design and operating principle
3.7.
Footswitch board (70493)
The footswitch board in the ARC 400 serves as the interface between footswitch JP3 and control board JP103.
The footswitch input socket enables different coded footswitches
to be connected.
A DC/DC converter on the control board provides a separate isolated +5 V DC supply to the isolated footswitch electronics.
Figure 3-29: Footswitch board
Figure 3-30: Footswitch board, component side
Socket 1
46
Socket 2
Pin Signal
Connector
JP3
Pin
Signal
Connector
JP3
1
Coding 1
Pin 1
1
Coding 1
Pin 8
2
Changeover Pin 7
switch
2
Changeover
switch
Pin 14
3
CUT
Pin 6
3
CUT
Pin 13
4
COAG
Pin 5
4
COAG
Pin 12
5
+5V_ISO
Pin 4
5
+5V_ISO
Pin 11
6
Coding 2
Pin 3
6
Coding 2
Pin 10
7
GND_ISO
Pin 2
7
GND_ISO
Pin 9
Service Manual ARC 400
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4 ARC 400 software update
ARC 400 software update
4.
4.1.
Instructions for software update
Software updates can be carried out using a USB stick.
All the steps needed to undertake an update are described in detail below. Follow the instructions very carefully, as the unit can be
damaged if the correct sequence is not followed.
The time needed for the update is about 25 minutes.
The following materials are required:
-
BOWA USB memory stick item no. 900-402 or comparable USB memory stick
1. Insert the BOWA USB stick with the new software into
the USB port.
Figure 4-1: Insert USB stick
2. Connect the ARC 400 to the power supply using the
power cable and switch the electrosurgical unit on at
the mains switch on the back of the unit.
Figure 4-2: Turn on the mains switch
3. Switch on the electrosurgical unit at the On/Off button
on the front of the device.
Figure 4-3: Switch on the ARC 400
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Service Manual ARC 400
47
4 ARC 400 software update
4. After a further short start-up phase, the main menu will
appear as usual. Now tap the [Menu] button.
Figure 4-4: Arrow key button
5. In the menu, tap the
[Service] button.
Figure 4-5: Service button
6. Tap the
[Enter password] button.
Figure 4-6: Password entry button
7. Enter the following password:
666666.
Figure 4-7: Password entry
8. Tap the
[Update system] button.
Figure 4-8: Update system button
9. The update begins automatically and the screen display shown in Figure 4-9 appears.
Figure 4-9: Update is in progress
48
Service Manual ARC 400
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4 ARC 400 software update
NOTE
Care must be taken to ensure that the ARC 400 is not disconnected from the power supply nor switched off while updating is in progress!
10. Updating takes up to 20 minutes. The screen display
shown in Figure 4-10 appears once the update has
been successfully completed.
Figure 4-10: Update successful
11. Switch the electrosurgical unit off at the On/Off button
on the front of the device and remove the USB stick
from the USB port.
Figure 4-11: Detach USB stick
12. Switch on the electrosurgical unit again by using the
On/Off button on the front of the device.
Figure 4-12: Switch on the ARC 400
13. Following a short start-up phase, the touchscreen calibration menu will appear. Tap on each of the depicted
cross-hairs (1-5) in turn.
Figure 4-13: Touchscreen calibration
During this process, only touch the screen at the points specified
so as to prevent any defective calibration from occurring.
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Service Manual ARC 400
49
4 ARC 400 software update
14. After a further short start-up phase, the main menu will
appear as usual. Now tap the [Menu] button.
Figure 4-14: Arrow key button
15. Now tap the [System information] button.
Figure 4-15: System information button
16. In order to ensure that the update has now been successfully completed, compare the version displayed
with the enclosed contents of the USB stick.
Figure 4-16: Check unit version
Updating has now been fully carried out and the ARC 400 can be
used in the usual way.
50
Service Manual ARC 400
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5 Maintenance
Maintenance
5.
5.1.
Technical safety inspection (TSI)
During the technical safety inspection, the safety and functionality
of the electrosurgical unit, accessories and, if used, the equipment
trolley is checked. It must be carried out in order to detect equipment defects and verify the safety of the medical device.
Technical safety inspections must be carried out:

once a year (National prescribed shorter technical safety inspections must be observed.)

after every time that the electrosurgical unit is opened

The product and accessories may only be inspected by persons who have the required training, knowledge or experience
and who can perform the inspection independently.
When carrying out the technical safety inspection, observe the
rules and regulations that apply in the relevant country.
If necessary, refer to IEC 62353 for assistance when carrying
out the inspection.



5.1.1.
Document the results of the technical safety inspection and
keep this record in the medical device logbook for the electrosurgical unit.
Carrying out the TSI
Prescribed checks:

Visual inspection

Functional test

EASY neutral electrode monitoring

Measuring the HF power outputs

Electrical tests

The TSI test record can be found in Section 12, on page 118.

The TSI test instructions can be found in Section 11, on page
91.
If the results deviate from the values shown in the test record or
are outside the stated maximum values, the electrosurgical unit
must be calibrated and the technical safety inspection carried out
once again. If this does not remedy the situation, contact the
Technical Service at BOWA-electronic GmbH & Co. KG.
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Service Manual ARC 400
51
6 Problem solving
Problem solving
6.
If the electrosurgical unit is not working properly, use this section
to rectify faults.
6.1.
Functional test of boards
The internal fault memory allows the boards and their function to
be checked.
For rapid and efficient troubleshooting, please contact the BOWA
service department.
6.1.1.
Dealing with a board fault
Proceed as follows:
1.
Change the entire board.
Removing and installing boards is described in Section 8, page 66.
2.
52
Carry out a technical safety inspection (see Section 11, page 91).
Service Manual ARC 400
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6 Problem solving
6.2.
Information messages displayed on the
electrosurgical unit
6.2.1.
Procedure to be followed when information messages appear
The HF-device constantly performs a self-test. If the self-test fails,
an information message will pop up on the display.
If an information message repeatedly appears, the unit's accessories and settings must be checked.

If information messages persist both after the electrosurgical
unit has been switched off and then back on, and after the
fault has been repaired, contact the BOWA Service department.
Information messages
The electrosurgical unit generates information messages in the
form of:

an audible alarm

information message in display
If faults appear during the self-test that might cause an accident,
the electrosurgical unit will be disabled for further use.
A list of the faults that have occurred (log file) is stored in the unit
and can be called up as required.
Read out the log file as described in Section 6.3, page 57 and
send this file to:
service@bowa.de.
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Service Manual ARC 400
53
6 Problem solving
6.2.2.
Fault
no.
4183
4184
Overview of information messages and the procedure for rectifying faults
Description
Faults when setting the relays for the
generator
Faults when setting the relays for socket
switch board
The self-test has detected that the spray
generator is not working.
4185
The self-test has detected that the
monopolar generator is not working.
4186
The self-test has detected that the bipolar generator is not working.
4187
4188
4195
The calibration is not valid and the unit
is now being operated with standard
values.
Redundant HF sensor values for U_HF
deviate too widely from one another.
Redundant HF sensor values for I_HF
deviate too widely from one another.
Redundant HF sensor values for
COS_PHI deviate too widely from one
another.
The reference voltage for the AD converter (LTC1660) is outside the valid
range.
The discharge resistors are defective.
4196
MOS-FETs are defective.
Power board needs to be changed.
4197
Power board needs to be changed.
4198
The control of the MOS-FETs is defective.
A PIC which is not relevant for safety
fails to react when the system starts.
4199
An important PIC (programmable interrupt controller) is no longer reacting.
4189
4190
4191
4192
4193
54
An attempt was made to activate a generator which was deactivated by the
self-test.
Possible causes of faults
and action required
If this persistently occurs, the power
board needs to be changed.
If this persistently occurs, the socket
switch board PCB needs to be changed.
1. Check the cables between the power
board and control board JP22 to
JP25.
2. Change power board.
3. Change control board.
1. Check the cables between the power
board and control board JP22 to
JP25.
2. Change control board.
3. Change power board.
1. Check the cables between the power
board and control board JP22 to
JP25.
2. Change power board.
3. Change control board.
This error message involves a consequential error. Please note the history of
faults in the electrosurgical unit under
system messages.
Electrosurgical unit must be sent to
BOWA for calibration.
Service Manual ARC 400
Control board needs to be changed.
Control board needs to be changed.
Control board needs to be changed.
Control board needs to be changed.
Power board needs to be changed.
Error log must be read out. Send this
“error log” to the BOWA Service department for analysis.
Error log must be read out. Send this
error log to the BOWA Service department for analysis.
900-400_SM_V2.1.0_11747-S0-20160601-EN
6 Problem solving
Fault
No.
4202
5000
5001
5002
5003
5005
5006
5007
5008
5009
5010
5013
Description
The date currently saved in the unit is
invalid and cannot be used for checking
the scheduled TSI date. --> Please contact the Service department.
The sensors are displaying too high
values when the unit if off.
The PSU is defective.
The hardware regulation is not working
properly.
The fans do not function correctly when
the system starts up.
The relays of the socket switchover are
closed, even though no activation has
occurred.
More power is being supplied than is
permitted.
The LNT is transmitting more power
than is permitted.
The status of the generator does not
match the activation signals (footswitch,
fingerswitch, ...)
No activation is occurring but the generator is nevertheless still supplying power.
The generator is active and the EASY
reports that activation must not take
place.
The EASY status established by the
safety monitoring task does not match
the status reported by the EASY Task.
The unit cannot be activated any more.
5014
5015
5017
5106
5108
5109
EASY self-calibration outside the tolerance range
A fault has occurred on the SimCoag
module.
A flow is detected, even though no activation is active on the ARC PLUS.
The regulation is outside the valid limits.
At least one valve cannot be controlled
properly.
900-400_SM_V2.1.0_11747-S0-20160601-EN
Possible causes of faults
and action required
The system time must be
reset via the Service menu [password:
666666].
1. Change control board.
2. Change power board.
Power board needs to be changed.
1. Change control board.
2. Change power board.
1. Check the housing fans are operating
during the self-test phase.
2. Check fan on the power board is operating during the self-test phase.
The socket switch board needs to be
changed.
1. Change control board.
2. Change power board.
1. Change control board.
2. Change power board.
Electrosurgical unit must be sent to
BOWA for repair.
Electrosurgical unit must be sent to
BOWA for repair.
Electrosurgical unit must be sent to
BOWA for repair.
Electrosurgical unit must be sent to
BOWA for repair.
This error message involves a consequential error. Please note the history of
faults in the electrosurgical unit under
system messages.
Control board needs to be changed.
The SimCoag module needs to be
changed.
The pneumatic block of the ARC PLUS
needs to be changed.
ARC PLUS must be sent to BOWA for
repair.
The pneumatic block of the ARC PLUS
needs to be changed.
Service Manual ARC 400
55
6 Problem solving
5110
5111
5113
5114
5122
56
Communication with the PIC (voltage
sensor) has been lost
A supply voltage is outside the valid
range.
The inlet or outlet valves are leaking.
Calibration is not complete.
It has been detected that the ARC PLUS
glass front cannot be controlled.
Service Manual ARC 400
The control board of the ARC PLUS
needs to be changed.
Check the extra-low voltage power supply unit of the ARC PLUS. Replace the
control board of the ARC PLUS if a fault
cannot be detected there.
The pneumatic block of the ARC PLUS
needs to be changed.
ARC PLUS must be sent to BOWA for
repair.
Check the glass front’s cabling in the
ARC PLUS. Replace the glass front of
the ARC PLUS if a fault cannot be detected there.
900-400_SM_V2.1.0_11747-S0-20160601-EN
6 Problem solving
6.3.
Reading out the fault memory
The fault memory can be read out using the
ARC 400’s Service menu. Only the BOWA Service department
can carry out an evaluation of this fault memory. This data may
enable the cause of any problems that occur to be identified more
precisely. For various fault symptoms, it is therefore necessary to
read out this data and to pass it on to the BOWA Service department.
The following materials are required:
-
BOWA USB memory stick item no. 900-402 or comparable
USB memory stick
1. Insert the BOWA USB stick with the new software into
the USB port.
Figure 6-1: Insert USB stick
2. Connect the ARC 400 to the power supply using the
power cable and switch the electrosurgical unit on at
the mains switch on the back of the unit.
Figure 6-2: Turn on the mains switch
3. Switch on the electrosurgical unit at the On/Off button
on the front of the device.
Figure 6-3: Switch on the ARC 400
4. After a further short start-up phase, the main menu will
appear as usual. Now tap the [Menu] button.
Figure 6-4: Arrow key button
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6 Problem solving
5. In the menu, tap the
[Service] button.
Figure 6-5: Service button
6. Tap the
[Enter password] button.
Figure 6-6: Password entry button
7. Enter the following password:
001224.
Figure 6-7: Password entry
8. Tap the
[Save logfiles] button.
Figure 6-8: Update system button
9. The fault memory download begins automatically and
the screen display shown in Figure 6-9 appears. The
download process may take several minutes depending on the volume of data.
Figure 6-9: Update START
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6 Problem solving
10. If the download process has been carried out with no
faults, the screen display shown in Figure 6-10 appears. Please now remove the USB memory stick from
the USB port and confirm the message shown with the
[OK] button. The ARC 400 is restarted and can be
used in the usual way.
Figure 6-10: Update END
11. You will now find a folder named [arc_logs] on the
USB memory stick. This folder contains the file of the
fault memory just downloaded.
12. Send this file to service@bowa.de for analysis.
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6 Problem solving
6.4.
Troubleshooting
Faults may be classified as follows:

Start-up faults

Display faults

Voltage generation faults

Functional faults

Interference to other equipment
6.4.1.
Dealing with a board fault
If the measures carried out do not remedy the fault, you must fit a
new board.

Refer to Section 8 when replacing boards.
6.4.2.
Start-up faults
The electrosurgical unit will not switch on
Possible cause
Action

Power plug disconnected


Incorrect socket
Check that the power cable is properly
connected and making contact.

Faulty power cable

Change the power cable.

Check the supply voltage.

Connect the electrosurgical unit to a
different socket.
Faulty / damaged fuses

Change the fuses.
Cables inside the electrosurgical unit are
loose or disconnected

Check that all cables are properly connected and making contact.

Damaged control board connection


Control board malfunction
Check that all connecting cables are
properly connected and making contact.

Change the front unit.
Incorrect, inadequate supply voltage to the
electrosurgical unit
Malfunction of parts of front unit
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6 Problem solving
Electrosurgical unit does not perform a self-test, or does not complete it
Possible cause
Action
Information message was generated

Check the main display for an information
message.
Cables inside the electrosurgical unit are
loose or disconnected

Check that all cables are properly connected and making contact.
Incorrect, inadequate supply voltage to the
electrosurgical unit

Check the supply voltage.

Connect the electrosurgical unit to a different socket.

Damaged control board connection


Control board malfunction
Check that all connecting cables are
properly connected and making contact.

Software malfunction

Switch the electrosurgical unit off and
back on.
Footswitch does not activate the electrosurgical unit
Possible cause
Action
Footswitch is wrongly connected

Connect the footswitch to the correct output socket.
Footswitch signal is not being processed by
the control board.

Check that all connecting cables are
properly connected and making contact.
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6 Problem solving
6.4.3.
Display faults
No display; partial or incorrect display
Possible cause
Action
Damaged or disconnected ribbon cable between display unit and DCU printed circuit
board

Check that the ribbon cables between the
display unit and DCU printed circuit board
are properly connected and making contact.
Cable between front unit and control board
(front panel power supply) is damaged or not
connected

Check that the cables between the front
panel and the control board are properly
connected and making contact.

Check the supply voltages on the front
panel.
DCU unit is sending faulty information to the
display.

Change the entire front unit.
Malfunction of parts of front unit

Change the entire front unit.
Constant interference on a video monitor
Possible cause
Action
Incorrect earthing of the housing

Check the earthing of the monitor.

Check the earthing of the electrosurgical
unit.
Another item of electrical equipment is causing interference on the monitor through reciprocal effects with the electrosurgical unit.

Connect all items of electrical equipment
to the same earth conductor.
Video cables used are not shielded

Connect the monitor using shielded video
cables.
Faulty monitor

Change the monitor.
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6 Problem solving
6.4.4.
Voltage generation faults
Despite being used correctly, the electrosurgical unit delivers no HF voltage
Possible cause
Action
Malfunction of footswitch or fingerswitch due
to cable breakage.

Switch off the electrosurgical unit.

Check the connectors and sockets.

Switch the electrosurgical unit on.

Change the connected instruments.

Measure the resistance of the fingerswitch handgrip when it is pressed
(< 200 Ω).
Faulty fingerswitch monitor

Check that the control board is functioning
correctly.
Footswitch is wrongly connected

Connect the footswitch to the correct
socket.
An information message was generated.

Check the display for an information message.

Control board malfunction


Signal enable in activation path is not
being generated
Check the signal path on the control
board.

Fit a new control board.

Check that the connecting cables between the power board and control board
are properly connected and making contact.
Power board malfunction
6.4.5.
Interference to other equipment
Interference to other equipment when electrosurgical unit activated
Possible cause
Action
Metal-to-metal arcing

Check that all connecting cables between
the electrosurgical unit and other equipment are properly connected and undamaged.
Electrically inconsistent routing of potential
equalisation system in operating theatre

Keep potential equalisation conductors as
short as possible.

Connect all potential equalisation conductors to the same earth cable.

Check the equipment manufacturer’s information.
If the interference persists after switching on:
the equipment is reacting to the frequencies
emitted by the electrosurgical unit
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7 Repairs
Repairs
7.
BOWA-electronic GmbH & Co. KG accepts liability for the safety,
reliability and performance of the electrosurgical unit subject to the
following conditions:

All instructions for installation and correct usage in accordance with the User Manual and the Service Manual have
been precisely followed.

Changes, repairs, new settings and similar procedures have
been carried out only by persons authorised by BOWA to do
this work.

The electrical installation in the relevant room complies with
local regulations and legal requirements.
7.1.
Repair on site
Repairs to the ARC 400 may only be carried out on the printed
circuit boards. When carrying out these repairs, refer to Sections 8
and 9.
 Carry out a technical safety inspection on the electrosurgical
unit if you have opened it (see Section 11, p. 91).

7.1.1.
Dispose of faulty parts properly.
Ordering of spares
Faulty boards may only be replaced by complete original BOWA
sub-assemblies.
Details
Have the following details ready:

64

Item no. of the electrosurgical unit
Serial no. of the electrosurgical unit

Spare part number
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7 Repairs
7.2.
Repair in the factory
If your electrosurgical unit develops a fault that necessitates repair
in BOWA’s main plant, proceed as follows:
Details
Have the following details ready:





Your full address
Item no. of the electrosurgical unit
Serial no. of the electrosurgical unit
Software version
A detailed description of the problem or the repair to be carried out
Sending the electrosurgical unit for repair
1.
Carry out a surface disinfection and pack the device in addition to the dispatch packaging, before it leaves the hospital
and practise surroundings to avoid germ abductions and infections. (see also GA cape. 8).
2.
Fill out the warranty / defects report (see Section 12, p. 116).
3.
Send your electrosurgical unit in its original packaging to the
address provided.
 You will receive your electrosurgical unit back when it has
been successfully repaired.
Address
Send your electrosurgical unit, and the temporary replacement, to
the following address:
BOWA-electronic GmbH & Co. KG
Heinrich-Hertz-Strasse 4–10
D-72810 Gomaringen
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8 Removal and installation of parts
7.2.1.
Warranty / Defects report
In order to offer you the necessary technical support quickly and
effectively in service situations, it is essential that we are given as
much information as possible about your faulty electrosurgical
unit.
For this reason, a warranty / defects report that gives our service
department important initial information about your problem is provided in the appendix (see Section 12, p. 116 ).
For a more comprehensive fault analysis, it is necessary to measure the output powers in the various modes (see instructions on
the technical safety inspection in Section 11, p. 91).
1.
Please fill in the warranty / defects report as completely as
possible.
2.
Send the completed Warranty / Defects Report to the Technical Service department at BOWA-electronic
GmbH & Co. KG:


Fax: +49 (0) 7072-6002-33
E-mail: service@bowa.de
Removal and installation of parts
8.
CAUTION
Risk of injury due to electric shock. The components are not
insulated against contact with foreign objects!

Switch off the electrosurgical unit at least 3 minutes before
commencing any service work.

Pull out the power plug.
Use an earthing strap and an ESD mat for protection against
electrostatic discharge.


66
Read the notes in Section 2 and follow the instructions in this
section.
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8 Removal and installation of parts
8.1.
Mains fuse
Tools required:
- Slotted screwdriver
Disassembly:
Figure 8-1: Mains fuse
-
Release the locking mechanism on both sides of the fuse
holder using a screwdriver and pull the fuse holder out of the
combination connector socket.
-
Take the 2 fuses out of the fuse holder.
Assembly:
-
Insert the new fuses into the fuse holder.
-
Insert the fuse holder into the combination connector socket
until you feel it click into position.
Supply voltage
100 – 127 V
220 – 240 V
Mains fuse to be used
2x T 10AH 250 V
2x T 5AH 250 V
NOTE
Incorrect mains fuse rating may damage the unit!

When replacing the fuse, be sure to use the correct fuse type.

Preferably, the fuse type specified below and verified by BOWA is to be used:
Manufacturer: Littlefuse /
Series:
215 (axial guidance and cartridge fuse)
Size:
5 x 20 mm
Fuses from other manufacturers should meet the requirements set down in
IEC 60127-2, page 5, at least.
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8 Removal and installation of parts
8.2.
Opening / closing the electrosurgical unit
Tools required:
- Torx screwdriver, size T10
- Torx screwdriver, size T20
Disassembly:
-
Remove the 6 screws (M3x6 mm) shown in
Figure 8-2 using the T10 Torx screwdriver.
Figure 8-2: Baseplate
- Remove the security seals in the positions shown in Figure 8-3
and turn the 2 screws clockwise using the T20 torx screwdriver to their end position.
Figure 8-3: Rear
-
Pull the housing cover backwards up to the limit stop
(see Figure 8-4).
-
Remove the cover from the unit.
Figure 8-4: Housing cover
Assembly:
Reassemble by reversing the steps described above for disassembly.
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8 Removal and installation of parts
8.3.
Power board
Tools required:
- Torx screwdriver, size T10
- Torx screwdriver, size T20
Disassembly:
-
Remove the metal struts marked in the Figure 8-5 and unplug
the 4 marked cable connections to the power board.
-
Remove the cover marked in Figure 8-5 by removing the securing screws.
-
Remove the screws (M4x8 mm) shown in Figure 8-6 using the
size T20 Torx screwdriver
-
Fold up the board plate with the power board through roughly
90°.
-
Disconnect the ribbon cable and the 6-way power supply cable shown in Figure 8-7 from the power board.
-
Fold the board plate with power board back down.
-
Disconnect the plugs marked in Figure 8-8 (4 units) of the
mains voltage supply on the power board.
-
Remove the 9 fixing screws (M3x5 mm) from the power board
using the size T10 Torx screwdriver
-
You can now remove the power board.
Figure 8-5: Power board
Figure 8-6: Board plate screws
Figure 8-7: Connection leads for control board
Figure 8-8: Power board
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8 Removal and installation of parts
Assembly:
Reassemble by reversing the steps described above for disassembly.
Cable list:
Control board
lead
Power board slot
L115
JP22
L116
JP23
L117
JP24
L118
JP25
CAUTION
After changing the board, carry out a complete technical safety
inspection of the unit.
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8 Removal and installation of parts
8.4.
Extra-low voltage power supply unit
The extra-low voltage power supply unit is located in the rear section of the ARC 400 on the right.
CAUTION
Risk of injury due to electric shock!

Before the extra-low voltage power supply unit can be removed, the electrosurgical unit must have been disconnected from the mains voltage for at least 5 minutes before servicing work of any kind can commence.
Tools required:
-
Torx screwdriver, size T10
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Unfasten the cable connections on the extra-low voltage power supply unit shown in Figure 8-9.
Use pointed pliers for this if necessary. Avoid pulling on the
cable when removing the connector!
-
Remove the screws (M3x5 mm) shown in Figure 8-10 using
the size T10 Torx screwdriver.
-
You can now remove the extra-low voltage power supply unit.
Figure 8-9: E.l.v. power supply connector
Figure 8-10: E.l.v. power supply screws
Assembly:
Reassemble by reversing the steps described above for disassembly.
NOTE

No recalibration of the unit is required after replacement.
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8 Removal and installation of parts
8.5.
Control board
Tools required:
-
Torx screwdriver, size T10
-
Torx screwdriver, size T20
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Remove the metal struts shown in Figure 8-11.
-
Detach the cable connections to the power board shown in
Figure 8-11.
To do this, pull off the plug-in connectors while gently pressing
together the plastic housing.
-
Remove the screws shown in Figure 8-12 (M4 x 8 mm) using
the size T20 Torx screwdriver.
-
Fold up the board plate with the power board through roughly
90°.
-
Disconnect the ribbon cable and the 6-way power supply cable shown in Figure 8-13 from the control board.
-
Disconnect the plug-in connections shown in Figure 8-14 from
the control board.
Figure 8-11: Power board
Figure 8-12: Board plate screws
Figure 8-13: Connection lead
Figure 8-14: Plug-in connections, front
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8 Removal and installation of parts
Disconnect the plug-in connections shown in Figure 8-15 from the
control board.
-
Remove the 13 fixing screws (M3x8 mm) for the control board
using the size T10 Torx screwdriver.
-
The control board can now be removed from the base of the
housing.
Figure 8-15: Plug-in connections, rear
Assembly:
Reassemble by reversing the steps described above for disassembly. Before starting up, check the plug-in connections to make
sure the right slot has been used, as shown in the following table:
Control board
connection
Target
Signal
JP138
NE socket left
EASY_1
JP139
NE socket right
EASY_2
JP140
Socket switchover JP122
EASY_NE
JP141
Socket 1 middle cable
COAG_BU1
JP142
Socket 1 upper cable
CUT_BU1
JP143
Socket switchover JP103
AE_F1
JP144
Socket 2 middle cable
COAG_BU2
JP145
Socket 2 upper cable
CUT_BU2
JP146
Socket switchover JP109
AE_F2
JP147
Socket switchover JP112
Mono_NE
JP148
Socket switchover JP107
Mono_AE
JP149
Socket switchover JP120
Bip_AE
JP150
Socket switchover JP119
Bip_NE
JP161
Socket switchover JP125
B4
JP162
Socket 4 middle cable
B4 SW
JP163
Socket switchover JP124
B3
JP164
Socket 3 middle cable
B3 SW
L115
Power board JP22
Mono_AE
L116
Power board JP23
Mono_NE
L117
Power board JP24
Bip_AE
L118
Power board JP25
Bip_NE
CAUTION

After changing the board, carry out a complete technical
safety inspection of the unit.
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8 Removal and installation of parts
8.6.
Socket switch board
Tools required:
-
Socket wrench, size 5.5
-
Torx screwdriver, size T20
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Remove the metal struts shown in Figure 8-16.
-
Detach the cable connections to the power board shown in
Figure 8-16.
To do this, pull off the plug-in connectors while gently pressing
together the plastic housing.
-
Remove the screws (M4x8 mm) shown inFigure 8-17 using
the size T20 Torx screwdriver
-
Fold up the board plate with the power board through roughly
90°.
-
Remove all the plug-in connectors from the socket switch
board.
Figure 8-16: Power board
Figure 8-17: Board plate screws
NOTE
Danger of mix-ups!
Figure 8-18: Screws on switch board.

Label the connectors so cables cannot be accidentally
swapped round during assembly.
-
Unscrew the M3 nuts shown in Figure 8-18 using the size 5.5
socket wrench.
Assembly:
Reassemble by reversing the steps described above for disassembly.
Before starting up, check the plug-in connections to make sure the
right slot has been used, as shown in the following table:
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8 Removal and installation of parts
Socket switchover
Target
Signal
JP100
JP101
JP105
JP124
JP108
JP111
JP125
JP113
JP116
JP119
JP120
JP103
JP104
JP107
JP109
JP110
JP112
JP122
JP102
JP121
JP117
JP114
Control board connection
Socket 3 top
Socket 3 bottom
Control board JP163
Socket 4 top lead white strand
Socket 4 top lead black strand
Control board JP161
Socket 4 bottom lead white strand
Socket 4 bottom lead black strand
Control board JP150
Control board JP149
Control board JP143
Socket 1 AE (bottom)
Control board JP148
Control board JP146
Socket 2 AE (bottom)
Control board JP147
Control board JP140
Not connected
Not connected
Not connected
Not connected
--BIP_3_P
BIP_3_N
FS_BIP_3
BIP_4_P/4A_P
BIP_4B_P
FS_BIP_4
BIP_4_N/4B_N
BIP_4A_P
BIP_NE
BIP_AE
AE_F1
Mono_AE_1
Mono_AE
AE_F2
Mono_AE_2
Mono_NE
EASY_NE
GND
-------
Note
K100
JP105
JP100
K101
JP124
JP104
JP101
JP103
JP102
All slots marked yellow in Figure 8-19 must be connected!
JP106
K103
JP111
K104
JP125
JP110
JP109
JP107
D106
D107
D108
K102
JP108
K105
JP116
K106
JP121
K107
Figure 8-19:
JP120
JP119
JP117
K108
JP122
JP112
JP113
JP114
Socket switch board, component side
CAUTION

After changing the board, carry out a complete functional and
activation test, paying special attention to the activations of
Cut and Coag respectively.

Check the AUTOSTART function.
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8 Removal and installation of parts
8.7.
Interface board
Tools required:
-
Socket wrench, size 5.5
-
Socket wrench, size 5.0
-
Torx screwdriver, size T10
-
Torx screwdriver, size T20
-
Forceps
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Remove the metal struts shown in Figure 8-20.
-
Detach the cable connections to the power board shown in
Figure 8-20.
To do this, pull off the plug-in connectors while gently pressing
together the plastic housing.
-
Remove the screws (M4x8 mm) shown inFigure 8-21 using
the size T20 Torx screwdriver
-
Fold up the board plate with the power board through roughly
90°.
-
Disconnect the plug-in connection shown in Figure 8-22 from
the control board.
Figure 8-20: Power board
Figure 8-21: Board plate screws
Figure 8-22: Plug-in connector Footswitch board
-
Remove the screws shown in Figure 8-23 (M3 x 10 mm) using
the size 10 Torx screwdriver. In doing so, you will also need to
counter the nuts on the screws using the size 5.5 wrench.
-
Remove the footswitch socket board.
Figure 8-23: Screws on Footswitch board
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8 Removal and installation of parts
-
Detach the plug-in connection shown in Figure 8-24 from the
interface board, using a forceps if necessary.
-
Remove the screws marked red in Figure 8-24.
-
Remove the screws of the 9-pin interface socket marked blue
in Figure 8-24, using the size 5.0 mm socket wrench.
-
Remove the interface board sideways.
Figure 8-24: Screws on Interface board
Assembly:
Reassemble by reversing the steps described above for disassembly.
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8 Removal and installation of parts
8.8.
Footswitch board
Tools required:
-
Socket wrench, size 5.5
-
Torx screwdriver, size T10
-
Torx screwdriver, size T20
-
Forceps
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Remove the metal struts shown in Figure 8-25.
-
Detach the cable connections to the power board shown in
Figure 8-25.
To do this, pull off the plug-in connectors while gently pressing
together the plastic housing.
-
Remove the screws (M4x8 mm) shown in Figure 8-26 using
the size T20 Torx screwdriver
-
Fold up the board plate with the power board through roughly
90°.
-
Disconnect the plug-in connection shown in Figure 8-27 from
the control board.
-
Remove the screws shown in Figure 8-28 (M3x10 mm) using
the size 10 Torx screwdriver. In doing so, you will also need to
counter the nuts on the screws using the size 5.5 wrench.
-
Remove the footswitch board.
Figure 8-25: Power board
Figure 8-26: Board plate screws
Figure 8-27: Plug-in connector Footswitch board
Figure 8-28: Screws on Footswitch board
78
Assembly:
Reassemble by reversing the steps described above for disassembly.
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8 Removal and installation of parts
8.9.
Potential equalisation connection
Tools required:
-
2 open-ended spanners, size 10
-
Socket wrench, size 10
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Remove nut 1 shown in Figure 8-29 using the size 10 openended spanner.
-
Remove the serrated lock washer and spacer washer.
-
Remove the 3 protective earth cables.
-
Remove the spacer washer.
-
Remove nut 2 shown in Figure 8-29 using the size 10 openended spanner, while gripping the potential equalisation connection tightly with the size 10 socket wrench.
-
Remove the potential equalisation connection shown in Figure
8-30 from the housing.
1
2
Figure 8-29: Potential equalisation bolt
Figure 8-30: Potential equalisation connection
Assembly:
Reassemble by reversing the steps described above for disassembly.
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8 Removal and installation of parts
8.10.
Connector socket / Mains filter
Tools required:
-
Torx screwdriver, size T10
Disassembly:
-
Open the electrosurgical unit as described in Section 8.2,
page 68.
-
Detach the cable connections marked red in Figure 8-31 from
the mains filter.
To do this, pull off the plug-in connectors while gently pressing
together the plastic housing.
-
Remove the (M3x10 mm) screws shown in Figure 8-32 using
the size T10 Torx screwdriver.
-
Take the connector socket out of the housing.
Figure 8-31: Mains filter connection
Figure 8-32: Connector socket screws
Assembly:
Reassemble by reversing the steps described above for disassembly.
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9 Parts list
9.
Parts list
ITEM NO.
DESCRIPTION
70447
Neutral electrode socket illuminated
orange
ILLUSTRATION
Socket 1:
70443
Monopolar with Bovie connection
illuminated
orange
Socket 1:
70441
Monopolar with ERBE connection
illuminated
orange
Socket 2:
70444
Monopolar with Bovie connection
illuminated
orange
Socket 2:
70442
Monopolar with ERBE connection
illuminated
orange
Socket 3:
70446
Bipolar 3-pin illuminated
orange
Socket 3:
70448
Bipolar 3-pin & 1 ERBE connection
illuminated
orange
Socket 4:
70445
Bipolar 3-pin & 2 ERBE connections illuminated
orange
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9 Parts list
ITEM NO.
DESCRIPTION
11169
On/Off button
70464
Power board
70325
Control board
70327
DCU board
70357
Complete front unit
E/E with RFID
70359
82
ILLUSTRATION
Complete front unit B/B with RFID
---
Footswitch board
(is replaced by 70493)
70493
Footswitch socket with PCB board
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9 Parts list
ITEM NO.
DESCRIPTION
70204
Interface board
70326
Socket switch board
70220
RFID board monopolar
70219
RFID board bipolar
10971
Extra-low voltage power supply unit
11092
Touch Controller board
11173
Mains filter
11024
Fuse drawer
11196
Loudspeaker
10965
Housing foot
MN605-058
Rubber foot, black
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ILLUSTRATION
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83
9 Parts list
84
ITEM NO.
DESCRIPTION
10893
Potential equalisation connection
10896
Marking ring
70049
Ribbon cable 2x 26-way
---
Ribbon cable 2x MicroMatch 14way (is replaced by 70595)
70595
Ribbon cable
1x MicroMatch 14-way /
2x MicroMatch 8-way
70158
Cable extra-low voltage power supply unit 2x Molex 6-way
70233
Ribbon cable 2x Erni SMC 12-way
70240
Cable extra-low voltage power supply unit 2x Molex 4-way
70341
Network cable JST SHR-10 
PHR-8
70225
Audio cable 2x JST PHR-4
70064
Earthing cable ring terminal  6.3
mm flat connector
70347
Loudspeaker cable JST PHR-2 
2x2.8mm
Service Manual ARC 400
ILLUSTRATION
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9 Parts list
ITEM NO.
DESCRIPTION
70350
Power cable 3-way  flat connector 2x6.3mm/ 2x4.8mm/2x6.3mm
70242
USB cable Micro A  Micro B
10967
Housing fan
11266
Housing base
10859
Housing cover
11735
Fuse T 5AH 250 V (5 x 20mm)
11736
Fuse T 10AH 250 V (5 x 20mm)
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ILLUSTRATION
Service Manual ARC 400
85
10 Technical specifications
10.
Technical specifications
10.1.
Technical data for ARC 400
Insulation type / Classification
EMC
IEC 60601-1-2
Level of protection provided by hous- IP 21
ing
Protection class as per EN 60601-1
I
Type of applied part as per EN
60601-1
CF
Compliance with standards
IEC 60601-1: 2005,
IEC 60601-1-2: 2007,
IEC 60601-2-2: 2009,
ISO 14971: 2007,
ISO 13485: 2003 + Cor.1 2009
Classification as per EC Directive
93/42/EEC
IIb
Power input
220 V - 240 V
Power consumption in standby mode 3 W / 40 VA
100 V - 127 V
3 W / 40 VA
Current consumption in standby
mode
200 mA
400 mA
Max. power consumption (at 400 W)
700 W /
1150 VA
700 W /
1150 VA
Max. current consumption (at 400 W) 5 A
10 A @ 100 V
8 A @ 127 V
Mains fuse
2x
T 5 AH 250 V
2x
T 10 AH 250 V
Mains frequency
50 / 60 Hz
50 / 60 Hz
Connection for
potential equalisation
Dimensions and weight
External dimensions: width x height x 430 x 180 x 475
depth (mm)
86
Net weight
12.5 kg
Packaging details /
Packaging dimensions
Box 685 x 497 x 280
Gross weight
18 kg
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10 Technical specifications
Programs
Number of programs in the unit
300
Standard programs, factory set
Individually programmable
Program name shown on the display
Monitoring of the neutral electrode
EASY: Electrode Application System
Display of one-part, split and baby
electrode in main menu and neutral
electrode selection
Contact resistance between the individual surfaces of split neutral electrodes shown on the display
Using colour and contact indicator
Display of the lead resistance when
using one-part neutral electrodes
Max. permissible resistance between
the individual surfaces of split electrodes
300 Ω
Warning signal in the event of risk in
connection with neutral electrodes
visual, acoustic
Sounds
Warning sound, activation
sounds, button sound, start-up
melody
Warning as text on the display
Text message with further information
Safety features
ISSys: Integrated Safety System
Arcing control
ARC CONTROL
Continuous monitoring of the HF
Text message with further inforleakage currents with error messages mation
Monitoring of the dosage; error message on the display
Continuous self-test
Continuous status indication on the
display
Operating errors shown in display
Text message with further information
System faults shown in display
Text message with further information
Technical safety inspection (TSI)
Automatic reminder function (optional)
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10 Technical specifications
Safety features
Operating instructions
Can be called up in the menu, in
paper form, USB stick incl. PDF
Documentation
Recording and storage of data in the
unit
System information with time
stamp
Error statuses
Operating errors
Retrieval of this data via the display
Text message with further
information
Communication
Display
Capacitive 9” touchscreen
External interface for communication
with ARC PLUS
Fibre optic cable
USB interface for software updates
External PC interface, UART, using
BOWA software for service support
UART
Service support
Service interface for service support
Service support integrated in the unit
via service programs
Service support via
ISSys
Cooling
Convection
Temperature-controlled fan
Operating mode
Intermittent (on/off)
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10 / 30 sec. (on/off)
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10 Technical specifications
Key data
Maximum MONOPOLAR performance
400 W (at 200 Ω)
Maximum BIPOLAR performance
400 W (at 75 Ω)
Output frequency
350kHz / 1MHz
Monopolar sockets
2x (footswitching and fingerswitching)
Bipolar sockets
3x (footswitching and fingerswitching)
Connection for footswitch
2x
AUTOSTART
Options
Bipolar resection M098-900395,
LIGATION M098-900396,
SimCoag Bipolar M098-900399
Equipment/items delivered
Includes Dr. Dongle, USB stick,
operating instructions, power cable,
potential equalisation conductor
RFID
Transmitter frequency
13.56 MHz
Duty cycle
0-100%
Modulation scheme
AM
Antennas
Two internal antennas
(Antenna diversity – no simultaneous transmission to both antennas)
Number of channels
1
Max. RF output power
33dBm (<<42 dBµA/m in 10m)
Applied RF standards
ETSI EN 300330-1 V1.7.1
(2010-02)
ETSI EN 300330-2 V1.5.1
(2010-02)
Compatibility
Permitted combinations
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ARC PLUS (900-001), footswitch
(901-031, 901-032, 901-011)
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89
10 Technical specifications
90
Environmental conditions
Operation
Transport and
storage
Temperature
+10°C to +40°C
-20°C to +50°C
Relative humidity
30% to 75%, noncondensing
0% to 90%, noncondensing
Air pressure
700 to 1060 hPa
500 to 1060 hPa
Operating height
3000 metres
above sea level
---
Service Manual ARC 400
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11 Test instructions for TSI
Test instructions for TSI
11.
The following materials are required:

BOWA service case
(BOWA item no.: 050-250)

Electrical safety tester, e.g. RIGEL 288+
Key to symbols
Mains voltage
L, N
Protective earth
Mains connection
Protective earth
terminal
PE
Power supply unit
(MAINS PART)
Applied part
Applied part type
F
Internal resistance safety
tester (measuring
device)
Ohmmeter
AP1
AP2
…….
Housing part
without protective
earth connection
Applied part with
different functions
Optional connection
Insulation resistance meter
Connection to
electrically conductive parts.
Figure 11-1: Symbols
11.1.
Visual inspection
1.
Check the electrosurgical unit and accessories for visible external damage.
2.
Check the legibility of labels, CE marks and rating plate.
3.
Make sure that the fuses in the power input socket 17 correspond to the prescribed rating on rating plate 25.
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11 Test instructions for TSI
11.2.
Electrical safety test
Measuring protective earth conductor resistance
CAUTION
Risk of injury due to electric shock!

For this measurement, disconnect the electrosurgical unit
from the power supply.
Figure 11-2: Measuring the PE conductor resistance as per IEC 62353:2014
1. Measure the PE conductor resistance between the power
cable and the potential equalisation connection “18”.
2. Record the measured value in the TSI report.
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11 Test instructions for TSI
The electrical safety test as per IEC 62353 must always be performed in the ARC 400’s service mode [Safety check].
Start service mode [Safety check]
for the electrical safety test
1. Connect the ARC 400 to the power supply using the
power cable and switch the electrosurgical unit on at
the mains switch on the back of the unit.
Figure 11-3: Turn on the mains switch
2. Switch on the electrosurgical unit at the On/Off button
on the front of the device.
Figure 11-4: Switch on the ARC 400
3. After a further short start-up phase, the main menu will
appear as usual. Now tap the [Menu] button.
Figure 11-5: Arrow key button
4. In the menu, tap the
[Service] button.
Figure 11-6: Service button
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11 Test instructions for TSI
5. Tap the
[Enter password] button.
Figure 11-7: Password entry button
6. Enter the following password:
666666.
Figure 11-8: Password entry
7. Tap the [Safety check] button.
Figure 11-9: Safety check button
8. The ARC 400 restarts and the main menu of the Safety
check mode appears.
Figure 11-10: Safety check menu
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11 Test instructions for TSI
Measuring the equipment leakage current
as per IEC 62353:2015-10
CAUTION
Risk of injury due to electric shock!

Isolate the electrosurgical unit.

The measurements must be carried out:
 With mains voltage
 In every power plug position, if applicable
 As per IEC 62353, Figure 7
Figure 11-11: Measurement circuit for measuring the equipment leakage current as per IEC 62353:2014, Figure 7
Figure 11-12: Connection diagram for measuring the equipment leakage
current
Figure 11-13: Measuring the equipment leakage current
1. Connect the safety tester as shown in the connection diagram provided.
2. Measure the equipment leakage current.
3. Record the measured value in the TSI report.
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11 Test instructions for TSI
Measuring leakage current from the applied part
as per IEC 62353:2015-10

The measurements must be carried out:
 In service mode “Safety check” (see p. 93)
 With mains voltage
 In every power plug position, if applicable
 As per IEC 62353, Figure 10
 Individually in the following Safety check modes:
-
leakage current “Monopolar sinus”
-
leakage current “Monopolar impulse”
-
leakage current “Bipolar”
Figure 11-14: Measuring leakage current from the applied part as per IEC 62353, Figure 10
Figure 11-15: Connection diagram for measuring
Figure 11-16: Measuring leakage current from the applied part
leakage current from the applied part
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11 Test instructions for TSI
1. Connect the safety tester as shown in the connection diagram provided.
2. Tap the [Monopolar sinus] button.
3. Measure the leakage current from the applied part.
4. Record the measured value in the TSI report.
Figure 11-17: TSI mode selection
5. Tap the [Monopolar impulse] button.
6. Measure the leakage current from the applied part.
7. Record the measured value in the TSI report.
Figure 11-18: TSI mode selection
8. Tap the [Bipolar] button.
9. Measure the leakage current from the applied part.
10. Record the measured value in the TSI report.
Figure 11-19: TSI mode selection
11. Exit Safety check mode by tapping the [back] button. The
unit restarts and can now be used in the usual way.
Figure 11-20: TSI mode selection
NOTE
Always exit Safety check mode once the check has been
concluded!

If the ARC 400 is switched to one of the Safety check
modes, it will remain in this operating condition and will not
allow any other functions to be performed until the [back]
button is clicked in the Safety check main menu.
If this [back] button is not clicked, the ARC 400 remains in
this operating condition even if the unit is disconnected from
the mains voltage.
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11 Test instructions for TSI
11.3.
Functional test
On/Off button illumination
Check whether the orange-coloured light ring around the On/Off
button is illuminated, if the electrosurgical unit is connected to the
power supply system and is switched on.
Display
The display can be checked to ensure it is working properly using
the Service menu as follows:
1. Connect the ARC 400 to the power supply using the
power cable and switch the electrosurgical unit on at
the mains switch on the back of the unit.
Figure 11-21: Turn on the mains switch
2. Switch on the electrosurgical unit at the On/Off button
on the front of the device.
Figure 11-22: Switch on the ARC 400
3. After a further short start-up phase, the main menu will
appear as usual. Now tap the [Menu] button.
Figure 11-23: [Menu] button
4. In the menu, tap the
[Service] button.
Figure 11-24: [Service] button
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11 Test instructions for TSI
5. Tap the
[Enter password] button.
Figure 11-25: [Enter password] button
6. Enter the following password:
666666.
Figure 11-26: Password entry
7. Tap the [Hardware tests] button.
Figure 11-27: [Hardware tests] button
8. The test pattern shown in Figure 11-28 appears. Tap
anywhere on the screen to close the test pattern.
Figure 11-28: Test pattern
9. Tap the [Display] button.
Figure 11-29: [Display] button
10. After every tap of the finger, the display now lights up in
the following colours: RED / GREEN / BLUE / WHITE.
Check to see whether the individual colours are displayed correctly without any pixel faults. Tap the colour
WHITE to reach the menu shown in Figure 11-30.
11. If all the colours have been shown without any pixel
faults, confirm the functionality as shown in Figure 1130.
Figure 11-30: [Confirmation] button
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11 Test instructions for TSI
12. Check that the display brightness function is working
with the [+] and [-] buttons.
Figure 11-31: [+]/[-] button
13. Confirm the functionality as shown in Figure 11-32 and
exit the display test by tapping the [OK] button.
Figure 11-32: [Confirmation] button
Activation and socket lights functional test
1. In the Hardware Tests menu, tap the [LED] button.
Figure 11-33: [LED] button
2. All of the activation and socket lights are switched on
one after the other. Check whether all of the lights light
up in turn as shown on the display. Confirm the functionality as shown in Figure 11-34 and exit the display
test by tapping the [OK] button.
Figure 11-34: [Confirmation] button
Touchscreen functional test
1. In the Hardware Tests menu, tap the [Touch] button.
Figure 11-35: [Touch] button
2. Now accurately tap all the crosses shown until there
are no more on the display. Exit the touchscreen functional test by tapping the [OK] button.
Figure 11-36: [Touch Test] button
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11 Test instructions for TSI
SD memory card functional test
1. In the Hardware Tests menu, tap the [SDCard] button.
Figure 11-37: [SDCard] button
2. Start the automatic functional test by tapping the
[Start] button.
3. The test only takes 1-2 seconds. The result is shown in
the field highlighted in red if the test was passed successfully.
Figure 11-38: [Start] button
4. Exit the SD memory card functional test by tapping the
[OK] button.
Loudspeaker functional test
1. In the Hardware Tests menu, tap the [Speaker] button.
Figure 11-39: [Speaker] button
2. The loudspeakers (right / left) are controlled both alternately and simultaneously. Check whether both loudspeakers are working and confirm this according to the
functionality as shown in Figure 11-40.
5. Exit the loudspeaker functional test by tapping the [OK]
button.
Figure 11-40: [Confirmation] button
6. Exit the Hardware Tests menu by tapping the [OK] button. The unit restarts and can be used in the usual way.
Figure 11-41: [OK] button
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11 Test instructions for TSI
ARC PLUS communication interface
No. Action
Test criterion
1.

Connect the optical transmit connection –
of the ARC 400 to the optical receive
connection of the ARC 400 using the fibre optic cable.
2.

Set an Argon mode and check on the
ARC 400 display whether an ARC
PLUS unit has been recognised.
102
Service Manual ARC 400
The following icon appears in the display 11:
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11 Test instructions for TSI
11.4.
Activation test
Activation of Monopolar Cut / Coag (socket 1)
with fingerswitch and footswitch
No. Action
Test criterion
–
1.

Connect the handgrip to socket 1.
2.

Connect the NE connection cable
–
(shorting connector) to neutral electrode
socket 5.
3.

Select the Standard – Cut
and Forced mixed – Coag mode
4.

Activate socket 1 using the handgrip.
5.

Connect a double-pedal footswitch to
footswitch socket 14.
6.

Assign a footswitch to socket 1.
7.

Activate socket 1 with the footswitch
(yellow and blue pedal).
900-400_SM_V2.1.0_11747-S0-20160601-EN
Display 6 and audible signal are triggered:

Cut with fingerswitch:
Display 6 yellow

Coag with fingerswitch:
Display 6 blue
–
Display 6 and audible signal are triggered:

Cut with footswitch:
Display 6 yellow

Coag with footswitch:
Display 6 blue
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11 Test instructions for TSI
Activation of Monopolar Cut / Coag (socket 2)
with fingerswitch and footswitch
No. Action
Test criterion
–
1.

Connect the handgrip to socket 2.
2.

–
Connect the NE connection cable
(shorting connector) to neutral electrode
socket 5.
3.

Select the Standard – Cut
and Forced mixed – Coag mode
4.

Activate socket 2 using the handgrip.
5.

Connect a double-pedal footswitch to
footswitch socket 15.
6.

Assign a footswitch to socket 2.
7.

Activate socket 2 with the footswitch
(yellow and blue pedal).
104
Service Manual ARC 400
Display 7 and audible signal are triggered:

Cut with fingerswitch:
Display 7 yellow

Coag with fingerswitch:
Display 7 blue
–
Display 7 and audible signal are triggered:

Cut with footswitch:
Display 7 yellow

Coag with footswitch:
Display 7 blue
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11 Test instructions for TSI
Activation of Bipolar Coag (socket 3)
No. Action
Test criterion
1.

Connect a bipolar instrument to socket 3.
–
2.

Connect a double-pedal footswitch to
footswitch socket 14.
–
3.

Select the Forceps Coagulation Mode
Standard for socket 3.
4.

Assign a footswitch to socket 3.
5.

Activate socket 3 with the footswitch
(blue pedal).
6.

Select the Bipolar Scissors Cut
mode at socket 3.
7.

Assign a footswitch to socket 3.
8.

Activate socket 3 with the footswitch
(yellow pedal).
900-400_SM_V2.1.0_11747-S0-20160601-EN
Display 8 and audible signal are triggered:

Coag with footswitch:
Display 8 blue
Display 8 and audible signal are triggered:

Cut with footswitch:
Display 8 yellow
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11 Test instructions for TSI
Activation of Bipolar Coag (socket 4)
No. Action
Test criterion
1.

Connect a bipolar instrument to socket 4.
–
2.

Connect a double-pedal footswitch to
footswitch socket 15.
–
3.

Select the Forceps Coagulation Mode
Standard for socket 4.
4.

Assign a footswitch to socket 4.
5.

Activate socket 4 with the footswitch
(blue pedal).
6.

Select the Bipolar Scissors Cut
mode at socket 4 .
7.

Assign a footswitch to socket 4.
8.

Activate socket 4 with the footswitch
(yellow pedal).
106
Service Manual ARC 400
Display 9 and audible signal are triggered:

Coag with footswitch:
Display 9 blue
Display 9 and audible signal are triggered:

Cut with footswitch:
Display 9 yellow
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11 Test instructions for TSI
Simultaneous activation of footswitch and fingerswitch not
possible
No. Action
Test criterion
1.

Connect a double-pedal footswitch to
footswitch socket 15.
–
2.

Connect the handgrip to socket 1.
–
3.

Connect the NE connection cable
–
(shorting connector) to neutral electrode
socket 5 .
4.

Select the Standard – Cut
mode at socket 1 .
5.

Assign a footswitch to socket 1.
6.

Activate socket 1 using fingerswitch and Display 6 and audible signal are triggered:
footswitch alternately.

Cut with fingerswitch:
Display 6 yellow
7.

Operate the fingerswitch and the footswitch, or both pedals of the footswitch
simultaneously.
900-400_SM_V2.1.0_11747-S0-20160601-EN

Coag with fingerswitch:
Display 6 blue

Cut with footswitch:
Display 6 yellow

Coag with footswitch:
Display 6 blue
Simultaneous activation of footswitch and
fingerswitch not possible
The activation which was first determined
has priority.
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11 Test instructions for TSI
Touch monitor - AUTOSTART function
-
Using the load resistance of the electrosurgical analyser, the
limit values required are set and connected at the bipolar
socket 3 of the unit.
-
A check is carried out to determine whether the touch monitor
is activated within the required limits.
40
Test unit (electrosurgical analyser)
Figure 11-42: Connection of ARC 400 to check the AUTOSTART function
No. Action
Test criterion
1.

Connect the bipolar cable to socket 3.
–
2.

Connect both ends of the measuring
lead to the variable resistance RL of the
HF power meter.
–
3.

Select the bipolar forceps mode Standard AUTO.
4.

Set the power meter to a load resistance RL of 500 Ω and connect it.
“Standard AUTO” mode is activated automatically:


5.
108

Switch the electrosurgical analyser's
load resistance off again.
Service Manual ARC 400


Activation signal sounds
Display 8 blue
Activation signal off
Display 8 blue goes out
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11 Test instructions for TSI
11.5.
EASY neutral electrode monitoring
-
With a resistance decade (maximum of 5% tolerance), the
required limit values are set and connected to neutral electrode socket 5 of the unit.
-
Check that the required/expected symbol lights up to indicate
that the correct neutral electrode has been detected.
Figure 11-43: Measuring the EASY neutral electrode monitoring
No. Action
1.

Connect the resistance decade box
(shown in Figure 11-33) to neutral
electrode socket 5 of the electrosurgical unit.
2.

In neutral electrode mode, select the
symbol for split neutral electrodes and
confirm input by pressing the “OK”
button
3.

Set a resistance of 0 Ω at the resistance decade and make a note of
the result in the test record.
900-400_SM_V2.1.0_11747-S0-20160601-EN
Test criterion
The symbol for split neutral electrodes
starts to glow red and the “Poor patient
contact” warning appears.
Service Manual ARC 400
109
11 Test instructions for TSI
110
4.

Set a resistance of 20 Ω at the resistance decade and make a note of
the result in the test record.
The symbol for split neutral electrodes
starts to glow green.
5.

Now increase the resistance of the
resistance decade which has already
been plugged in from 20 Ω to 100 Ω
and note down the result in the test
record.
The symbol for split neutral electrodes
starts to glow red and the “Poor patient
contact” warning appears.
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
11 Test instructions for TSI
11.6.
Measuring the HF output power
Cutting / Coagulation
Checking the monopolar output power
1.
Connect resistance RL of the HF power meter to neutral electrode socket 5 and the active output of socket 1 or socket2.
9
3
300
120
Test unit (electrosurgical analyser)
Figure 11-44: Measuring the monop. output power, Cutting / Coagulation
2.
In neutral electrode mode, select the symbol for one-piece
neutral electrodes and confirm input by pressing the “OK” button
3.
Set the required resistance RL = 500 Ω on the power meter.
4.
Set the required parameters on the electrosurgical unit (mode,
effect, power).
5.
Activate the electrosurgical unit using the fingerswitch or the
footswitch.
6.
Record the output power in the TSI report.
900-400_SM_V2.1.0_11747-S0-20160601-EN
Service Manual ARC 400
111
11 Test instructions for TSI
Checking the bipolar output power
1.
Connect the resistance RL of the HF power meter to socket 34
using a suitable bipolar cable.
120
Test unit (electrosurgical analyser)
Figure 11-45: Connection of ARC 400 to check bipolar output power in Coagulation mode
112
2.
Set the required resistance RL = 50 Ω on the power meter.
3.
Set the required parameters on the electrosurgical unit (mode,
power).
4.
Activate the electrosurgical unit using the blue footswitch.
5.
Record the output power in the TSI report.
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
11 Test instructions for TSI
11.7.
Test devices used
All the test devices used are to be recorded in the TSI report. It
must also be ascertained that tested and calibrated test devices
have been used.
11.8.
Final steps
Reading out the log file
1. Read out the log file as described in Section 6.3, page
57 and send this file to:
service@bowa.de.
Setting the TSI date in the ARC 400
1. Now tap the [Menu] button.
Figure 11-46: [Menu] button
2. In the menu, tap the [Service] button.
Figure 11-47: [Service] button
3. Tap the
[Enter password] button.
Figure 11-48: [Enter password] button
4. Enter the following password:
666666.
Figure 11-49: Password entry
900-400_SM_V2.1.0_11747-S0-20160601-EN
Service Manual ARC 400
113
11 Test instructions for TSI
5. Tap the [Safety check date] button.
Figure 11-50: [Safety check date] button
6. Set the new TSI date with the [+] and [-] buttons and
confirm input by pressing the [OK] button.
The unit restarts now and can be used in the usual way
afterwards.
Figure 11-51: TSI date
114
Service Manual ARC 400
900-400_SM_V2.1.0_11747-S0-20160601-EN
12 Appendix
12.
Appendix
The appendix contains the following documents and forms:
1. Warranty and defects report
2. Service Report ARC 400
3. Overview of the wiring diagram
900-400_SM_V2.1.0_11747-S0-20160601-EN
Service Manual ARC 400
115
BOWA-electronic GmbH & Co. KG
Heinrich-Hertz-Strasse 4-10
Tel
+49 (0) 7072-6002-0
72810 Gomaringen
Fax
+49 (0) 7072-6002-33
Germany
E-mail
service@bowa.de
Warranty
WARRANTY / DEFECTS REPORT
Repair ☐
☐ Service Number:
Completed by
BOWA-electronic GmbH & Co. KG
Warranty claims will only be recognised if the defective part is returned with the fully completed warranty
report to BOWA-electronic GmbH & Co. KG, 72810 Gomaringen, Germany.
PROCESSED BY:
Date:
CUSTOMER / HOSPITAL:
Name:
Name:
Street:
Address:
Postcode /
Town:
Contact person:
Country:
Country:
E-mail /
Telephone:
E-mail / Telephone:
UNIT / ACCESSORY DETAILS
Unit / Accessory type:
Serial no. / LOT no.:
DESCRIPTION OF FAULT
ACCESSORIES INCLUDED
Installation date:
Start of warranty:
Contact person at agency:
BOWA-electronic GmbH & Co. KG
Heinrich-Hertz-Strasse 4-10
Tel
+49 (0) 7072-6002-0
72810 Gomaringen
Fax
+49 (0) 7072-6002-33
Germany
E-mail
service@bowa.de
Warranty
WARRANTY / DEFECTS REPORT
Repair ☐
☐ Service Number:
Completed by
BOWA-electronic GmbH & Co. KG
DETAILED FAULT ANALYSIS FOR ELECTROSURGICAL DEVICES
Was the neutral electrode connected to the unit?
YES
NO
Comment:
Was a split or one-piece neutral electrode used?
split
one-piece
Comment:
Was the neutral electrode connected to the patient?
YES
NO
Comment:
Which mode was used?
Comment:
Type of instrument connected?
Comment:
To which socket was the instrument connected?
1
2
3
4
Comment:
Was the unit activated via the footswitch or handgrip?
Footswitch
Handgrip
Comment:
At which connection was the footswitch connected?
1
2
Comment:
FUNCTIONAL TEST
MONOPOLAR
BIPOLAR
Connection
Socket 1
Socket 2
Socket 3
Socket 4
Footswitch
OK
OK
OK
OK
Handgrip
OK
OK
Coag
Coag
OK
Moderate Coag
Moderate Coag
OK
Forced Coag mixed
Standard mode
OK
Spray Coag
Spray Coag
OK
OK
OK
Cut
OK
Coag
OK
Forced Coag
OK
Cut
Coag
OK
OK
Cut
OK
Cut
OK
OK
Danger of infection!
Electrosurgical devices / accessories:
Carry out a surface disinfection and package the unit in addition to the shipping packaging before it
leaves the hospital/practice environment in order to avoid transmission of germs and infections.
Instruments:
Clean and sterilise the instrument before it leaves the hospital / practice environment to avoid transmission of germs and infections.
Test record for technical safety inspection
BOWA HF electrosurgical unit type ARC 400 (REF 900-400)
Hospital:
Date:
Department:
Contact person:
Item no.:
Comments
Serial no.:
fail
Software version:
pass
Unit type:
Protection class: I
Equipment type: CF
Visual inspection
Equipment and accessories with no detectable damage
All labels, CE marks and rating plate legible
Mains fuses are of the prescribed rating
Electrical safety test
1)
= perform measurement with power cable, resistance of power cable < 100 mΩ, resistance of unit < 200 mΩ.
Protective earth conductor test as per IEC 62353:2015-10
Limit value
Measured
value
1)
Earthing contact  potential equalisation (as per Figure 1
from IEC 62353)
Leakage current measurement as per IEC 62353:2015-10
Equipment leakage current N.C. (as per Figure 7 from IEC
62353)
Equipment leakage current S.F.C. (as per Figure 7 from IEC
62353)
Leakage current from the applied part
(Safety check mode = Monopolar sinus)
(as per Figure 10 from IEC 62353)
Leakage current from the applied part
(Safety check mode = Monopolar impulse)
(as per Figure 10 from IEC 62353)
Leakage current from the applied part (TSI mode = Bipolar) (as
per Figure 10 from IEC 62353)
max. 0.3 Ω
[Ω]
max. 500 µA
[µA]
max. 500 µA
[µA]
max. 50 µA
[µA]
max. 50 µA
[µA]
max. 50 µA
[µA]
Functional test
On/Off button illumination is lit.
Display / LED / touchscreen / SD card / loudspeakers (see Hardware Test in the Service menu)
ARC PLUS communication interface
Activation test
Activation of Monopolar Cut / Coag with footswitch + switching function (orange button) at input 1
Activation of Monopolar Cut / Coag with footswitch + switching function (orange button) at input 2
Activation of Monopolar Cut / Coag output 1
with 3-pin fingerswitch
Activation of Monopolar Cut / Coag output 2
with 3-pin fingerswitch
Activation of Bipolar Coag output 3
Activation of Bipolar Coag output 4
Simultaneous operation of footswitch and fingerswitch not possible
Touch monitor – AUTOSTART function at 500 Ohm
BOWA-electronic GmbH & Co. KG
Heinrich-Hertz-Strasse 4-10, D-72810 Gomaringen
This test record refers to the Service Manual
Page 1 of 2
900-400_SM_V2.1.0_11747-S0-20160601-EN
Serial no.:
Item no.:
fail
Comments
Software version:
pass
Unit type:
Protection
class: I
Equipment type:
CF
EASY neutral electrode monitoring
Resistance decade [Ω]
Setting
Expected colour of NE symbol
0Ω
red
Neutral electrode, two-piece
20 Ω
green
Neutral electrode, two-piece
100Ω
red
Neutral electrode, two-piece
Measuring the HF output power
Cutting / Coagulation
Reference value
[W]
Effect 9 RL = 500 Ω 300 W ± 20%
Mode name
RL
Standard - Cut
Standard - Forced / Mixed COAG Mode
RL = 500 Ω 120 W ± 20%
Effect 4 RL = 500 Ω 120 W ± 20%
Spray COAG mode
Bipolar Standard COAG mode
= coagulation
Measured value
[W]
RL = 50 Ω
120 W ± 20%
= cutting
Test devices used
Model
Serial number
Calibration valid until
electrosurgical analyzer
Safety tester
Resistance decade
Final steps
Read out the log files from the memory and send to service@bowa.de.
Reset the TSI date in the ARC 400 / affix a new inspection sticker (only if test has been passed!)
Final assessment
Inspection sticker issued
Electrosurgical unit has no safety-relevant defects and can continue to be used.
Electrosurgical unit poses no direct risks; identified defects should be remedied without delay.
Inspection sticker not issued
Electrosurgical unit must not be used until identified defects are corrected.
Comments
Acceptance
Tester:
Date, signature:
BOWA-electronic GmbH & Co. KG
Heinrich-Hertz-Strasse 4-10, D-72810 Gomaringen
This test record refers to the Service Manual
Page 2 of 2
900-400_SM_V2.1.0_11747-S0-20160601-EN
Copyright by BOWA-electronic, Gomaringen │ Germany
72810 Gomaringen │ Germany
Phone:
Fax:
+49 (0) 7072-6002-0
+49 (0) 7072-6002-33
info@bowa-medical.com │ www.bowa-medical.com
CE mark in accordance with Directive 93/42/EEC
Subject to technical and design changes
Heinrich-Hertz-Strasse 4–10
Printed in Germany
BOWA-electronic GmbH & Co. KG
900-400_SM_V2.1.0_11747-S0-20160601-EN
0123