Service Manual
Heraeus Megafuge 8
Sorvall ST8
Thermo Scientific SL8
PN: 12007200-01
The original version of this manual is valid. Thermo Scientific cannot guarantee the accuracy or completeness of subsequent copies
The original version of this manual is valid. Thermo
Scientific cannot guarantee the accuracy or
completeness of subsequent copies
TABLE OF CONTENTS
TABLE OF CONTENTS
Introduction
iii
Revision Control
iv
Chapter 1
Technical Data
1-1
Chapter 2
Service
2-1
Chapter 3
Chapter 4
Chapter 5
Servicing Schedule
2-2
Trouble Shooting
2-4
Error Codes
2-6
Test Points
2-13
System Menu and Service Menu
2-15
Imbalance Behavior
2-18
Cleaning of Instrument Parts
2-18
Electrical Safety Check
2-19
Functional Description
3-1
Block Functions
3-2
Main Board Functions
3-3
Display
3-5
Speed, Imbalance and Rotor Detection
3-5
Lid Lock System
3-5
Electrical Diagrams
4-1
Overview
4-2
Power Supply 1
4-3
Power Supply 2
4-4
Frequency Inverter
4-5
Protection Circuit
4-6
Controller
4-7
Imbalance RPM
4-8
Key Control
4-9
Disassembly of Instrument Parts
5-1
Disassembly of Mechanical Parts
5-2
Replacement of Electrical Components
5-4
Replacement of Drive Components
5-6
Removal of AutoLock
5-7
i
INTRODUCTION
Chapter 6
Chapter 7
Calibration (Reference Measurement)
6-1
Introduction
6-2
Requirements
6-2
Calibration (Reference Measurement) Procedure
6-3
Documentation
6-5
Spare Parts
7-1
Preventive Maintenance Checklist
A-1
Calibration Certification Form
B-1
Technical Bulletins
C-1
ii
INTRODUCTION
INTRODUCTION
CAREFULLY READ
INSTRUMENT.
THIS
MANUAL
BEFORE
SERVICING
YOUR
INFORMATION CONTAINED IN THIS DOCUMENT IS THE PROPERTY OF
THERMO FISHER SCIENTIFIC;
IT MAY NOT BE DUPLICATED OR DISTRIBUTED WITHOUT THE
OWNER’S AUTHORIZATION!
PURPOSE
This manual contains maintenance instructions intended for use by a qualified
maintenance or service technician.
It is organized to provide information on the theory of operation to assist in
troubleshooting for personnel of Thermo Fisher Scientific and authorized
service organizations. Moreover, it outlines parts replacement and calibration
procedures for putting the centrifuges back into service.
Should a specific maintenance problem arise which is not covered in this
manual, please contact our after sales or product support department.
iii
REVISION CONTROL
iv
REVISION CONTROL
Revision
01
Change
Initial release
Date
18.01.2013
TECHNICAL DATA
1-1
Heraeus Megafuge 8
Sorvall ST8
Thermo Scientific SL8
Environmental conditions
Permissible ambient temperature
Timer range
Max. speed
Min. speed
Max. kin. energy
Max. sound level at top speed
Indoor use only
Max. height above sea level 2000m
Max. relative humidity 80% at 31°C
Linear decrease until 50% relative humidity at 40°C
+2°C to +35°C
10sec – 99h 59min and hold mode
deviation
deviation: +/- 10 sec.
16000 rpm
accuracy: +/
+/- 10rpm
300 rpm
accuracy: +/
+/- 10rpm
< 8.2 kNm
< 61 dB (A)
Volt Version
Heat output BTU/h
Power consumption
Rated current
Height (lid closed)
closed
Height (lid open)
Width
Depth
Weight (without
rotor)
Rotor /
bucket
Rotor name
75005701
75005702
75005703
75005704
75005705
75005706
75005723
75005721
75005600
75005709
75003623
75005719
75005715
75003473
75005643
TX-150
150 Rotor
TX-150
150 Round Bucket
TX-150 Ovall bucket
TX-100S
TX-100
M-10
10 Rotor
M-10
10 Unsealed Bucket
M-10 Sealed Bucket
MT-12 Rotor
HIGHConic III Rotor
CLINIConic Rotor
MicroClick 30x2 Rotor
MicroClick 24x2 Rotor
Hematocrit Rotor
PCR Strip Rotor 8x8
Allowable
imbalance
[g]
10
10
10
10
10
10
10
10
4
10
10
4
4
1 capillary
4
120V
230V
1060
310 W
5.0 A
2.0 A
31 cm / 12.2 in
67 cm / 26.8 in
37 cm / 14.6 in
48 cm / 18.9 in
35 kg / 77 lbs
max. speed
max. x g
max radius
4500
4500
4500
4500
4500
4400
4400
4400
13000
8700
4400
14000
16000
13300
15000
3260
3260
3260
3215
3260
2576
2576
2381
16438
10155
3030
21694
24327
16810
17860
14.4
14.4
14.4
14.2
14.4
11.9
11.9
11.0
8.7
12.0
14.0
9.9
8.5
8.5
7.1
SERVICE
SERVICE
Servicing Schedule
2-2
Maintenance Routine without dismantling the centrifuge
2-2
Maintenance Routine after dismantling the centrifuge casing
2-3
Trouble Shooting
Malfunctions without Error Messages
2-4
2-4
Error Codes
2-6
Overview
2-6
Detailed Error Description an Action Plan
2-8
Test Points
2-13
System Menu and Service Menu
2-15
How to enter the System Menu
2-15
How to enter the Service Menu
2-15
System Menu Structure
2-16
Service Menu Structure
2-17
Imbalance Behavior
2-18
Cleaning of Instrument Parts
2-18
Electrical Safety Check
2-19
2-1
SERVICE
Servicing schedule
This chapter describes the maintenance work to be performed on a yearly basis.
A checklist can be found in the attachment A-1.
Maintenance routine without dismantling the centrifuge
Electrical installation and safety

Switch OFF the centrifuge and disconnect the unit from power, check voltage supply and mains
fusing (16 (15) Amps, slow blow characteristic).

Check condition of plug and wall socket - (let) replace defective parts.

Check cord condition and fixing / connection - replace or refit it.

Check condition of instrument socket and replace it in case of bad contacts.
Location and mechanical installation

Check the base (ground, table, trolley with lockable wheels etc.) for resonance-free and stable
conditions.

Check for a well ventilated place and sufficient distances to walls or adjacent equipment, without
exposition to direct sunlight.

Check the leveling of the centrifuge drive with help of a spirit level.
Lid latch mechanism and safety circuit

Connect the centrifuge to power and switch ON.

Check for correct lid closing and opening - if in disorder, readjust lid, hinges and/or lid latch.

Check the rubber gasket for correct sealing and replace, if damaged.

Check gas lid stay for correct function.

Check the electronic safety circuit: start the centrifuge. Let it shortly run and press stop. The lid
must not be unlocked by the microprocessor as long as the speed is more than 60 rpm - if safety
circuit is out of function, replace main board.
Cleanliness of rotor chamber and motor cover

Open the lid and remove the rotor by pressing the green AutoLock button in the center of the
rotor.

Clean the spin chamber with a dry and absorbent cloth (remove all dust and moisture - see also
page 2-18 for cleaning).

Check the cleanliness of the motor cover and take special care of the slot between the bowl and
the motor cover: penetrating fluids can damage the motor and/or electronics and foreign objects
may block the air flow.
Condition and sealing of rotors and accessories

Check the condition of rotors and accessory parts (especially all supporting or stressed
partitions): the rotor and/or accessory parts must not be used any longer, if there are visible
traces of mechanical damage or corrosion.

Check the condition of rotor and/or accessory sealing and replace them in case of malfunction.
2-2
SERVICE
AutoLock and motor shaft

Check the perfect condition of the AutoLock system. In case of malfunction use tool Kit
# 70904693 to change the AutoLock. (see page 5-7)

Check the condition of the drive motor shaft: the centrifuge must not be used any longer, if the
drive shaft is damaged (e.g. bend or it’s bearings are worn out).
Temperature level

Check the air inlet slots for free ventilation. Insufficient air flow will lead to an inadmissible
temperature rise of the motor and electronic parts.
Imbalance behavior

install available and empty rotors and check the imbalance behavior with rotor dependant cut off
and run through weights (see page 2-18) and replace worn anti vibration mounts, faulty main
board or sensor cover.
Maintenance routine after dismantling the centrifuge casing
Motor supporting elements

Check the anti vibration mounts of the drive motor and replace them in case of increased rubber
abrasion or abnormal occurrence of imbalance but at least after 3 years of usage.
Braking circuit

Check the function of the braking circuit (warming up of brake resistor, even and noiseless brake
effect) and replace defective parts in case of malfunction.
Clamp and plug connections of wires

Check the clamp and plug connections of all leads on the main board and all electrical Protection
earth core and grounding connections.

Check the grounding connection for continuity and all grounding plug connectors. (see also page
2-19 Electrical Safety Check)

Check insulation resistance and accessible current. (see page 2-19)
2-3
SERVICE
Trouble shooting
Malfunctions without error code
Error
Error Cause
Possible Error
Source
power switch with
integrated thermal
over current cut out
no mains
voltage supply
Display
remains off
No display
backlight
data
connection
disturbed
faulty connection
from main board to
display
faulty display or
main board
faulty connection
from main board to
display
LCD
powersafe
mode
faulty
backlight
Display
shows
BOOTING…
Check supply voltage at X16. If no voltage
is present, check power switch, instrument
socket and voltage supply.
Replace defective parts
faulty mains cord or
instrument socket
no low
voltage
supply for
display
Display
backlight is
lit, but
nothing
displayed
or
display
shows
cryptically
(wrong)
characters
mains fuse or circuit
breaker failed
Corrective Procedure
CPU program
reset may be
caused by
EMI
Check presence of 5V (LED V75), 15V
(LED V78) and 24V (LED V79) control
voltages on main board. If a voltage is
missing (LED off) replace main board.
Check the display cable (SSTP patch
cable). Replace the display.
Check for interferences such as radios,
micro wave ovens, etc. Check for good
grounding connection. Check the display
cable (SSTP – shielded cable). If no other
error source can be identified, replace main
board.
Press any button. To switch off the LCD
powersafe mode enter the system menu.
faulty backlight
Replace display.
supply voltage drop
(>10%)
(Let) improve the power supply. If the
voltage drops often, use a voltage
stabilizer.
bad or missing
grounding
connection
check all grounding connections
2-4
SERVICE
Error
Drive
makes
noises,
no good
separation
result
Error Cause
mechanical
Possible Error
Source
Corrective Procedure
worn anti vibration
mounts
Check anti vibration mounts and replace if
worn or older than 3 years.
(see page 5-6)
Trunnions of
swinging bucket
rotor not greased
sufficiently
Inform users that trunnions must be
cleaned and greased on a regular basis.
See user manual for more information.
Buckets of swinging
bucket rotor not
weight identical
Check weight index on buckets.
bad motor bearings
Turn motor by hand. If a scratching noise is
audible, replace complete motor.
missing phase
electrical
Check winding and insulation resistance of
the motor (see test points). If the motor and
it’s leads are ok, replace main board.
faulty electronic
Buttons
inoperative
overlay or
overlay
adaptor has
no contact
ribbon cable broken,
or no contact
Check correct sitting of ribbon cable in
overlay adaptor. Check ribbon cable
between overlay adaptor and main board.
Replace defective overlay, overlay adaptor
or ribbon cable.
2-5
SERVICE
Error-Codes
Should multiple errors occur at the same time, the centrifuge will display up to 3 errors at once, by
alternating them on the display.
Overview (details on following pages)
Error
Description
E-001
System clock unstable
E-002
Main state machine corrupted (software)
E-005
System reset by watchdog
E-008
Check sum error ROM test
E-010
NV-RAM communication error
E-011
NV-RAM does not match E-PROM
E-012
Check sum error NV-RAM constant area
E-014
Chamber over temperature: t > 50°C
E-015
Temperature sensor open
E-016
Temperature sensor short
E-017
Speed above rotor recognition speed limit
E-019
Rotor code not in rotor table
E-020
Rotor code corrupted
E-021
Rotor recognition and speed 1 measurement disturbed
E-022
Speed 2 measurement disturbed
E-023
Difference between speed 1 and speed 2 signals
E-025
Lid could not be opened
E-027
State of lid latch micro switches implausible
E-029
Motor does not turn
E-030
Control voltage failure
E-031
Motor over temperature: t > 150°C
E-033
High pressure in cooling system
E-034
Over voltage in power circuit
E-036
Over voltage or short circuit at inverter
E-038
Lid latch current abnormal (Speed 0)
E-040
Acceleration too slow
E-041
Offset voltage of imbalance sensor implausible
E-045
Safety test during restart failed
E-046
Lid opened during run
E-048
Software state machine error
E-050
Software state machine error
E-051
Software state machine error
E-052
Software state machine error
E-053
Software primary mask reading error
E-054
Software primary mask writing error
E-060
Chamber under temperature: t < -20°C
E-072
Software state machine error
2-6
SERVICE
Error
Description
E-074
Latch motor control fault
E-077
System health check error
E-078
Set speed above max speed
E-079
Speed above rotor maximum: >25rpm
E-080
Rotor detection failed
E-081
Second top speed check failed
E-083
Brake resistor over temperature
E-098
Imbalance detected
E-101
Temperature measurement shows great deviations to expected values
E-104
Temperature measurement could not be completed
E-105
Software state machine error
E-106
Lid latch current abnormal (Speed >0)
E-107
Main board over-temperature
2-7
SERVICE
Detailed error description and action plan
Error
E-001
E-002
E-005
E-008
E-010
E-011
E-012
E-014
Possible Error
Source
Corrective Procedure
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
Internal software Wait for rotor to stop and turn the power switch off. Wait 5
problem
seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
Internal software Wait for rotor to stop and turn the power switch off. Wait 5
problem
seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
ROM failed
seconds before turning it back on. If the error persists,
replace main board.
Wrong NV-RAM,
The rotor is coasting freely.
communication
Wait for rotor to stop and turn the power switch off. Wait 5
between NV-RAM
seconds before turning it back on. If the error persists,
and main controller
check NV-RAM and socket.
disturbed
Insert the correct NV-RAM
check versions of
NV RAM and
replace NV RAM with correct one
E-PROM
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
NV-RAM failed
seconds before turning it back on. If the error persists,
replace NV-RAM.
System clock on
main board failed
Possible
spare part
Main board
Main board
Main board
Main board
NV-RAM
NV-RAM
NV-RAM
Refrigerated units only: The rotor is decelerated with
maximum braking. DO NOT TOUCH ANY INSIDE PARTS
Compressor does
Compressor
AFTER OPENING THE LID! BURN HAZARD! Perform
not work,
Fan
compressor test (Service Menu), check fan and remove
low refrigerant,
TEV
dust from condensing unit. Replace defective parts.
fan inoperative
Refrigerant
In case of low refrigerant, use leak detector, repair leak
and recharge system.
E-015
Temp. sensor,
control circuits
E-016
Temp. sensor,
control circuits
E-017
Power interruption,
Reset during run
Refrigerated units only: The rotor is decelerated with
maximum braking. Disconnect PT1000 from main board
(X3) and check resistance
(R = 1,000Ω @ 0°C or 1,078Ω @ 20°C). Replace faulty
PT1000 or faulty main board.
Refrigerated units only: The rotor is decelerated with
maximum braking. Disconnect PT1000 from main board
(X3) and check resistance
(R = 1,000Ω @ 0°C or 1,078Ω @ 20°C). Replace faulty
PT1000 or faulty main board.
After power reset the speed is above 2,000rpm. The rotor
is coasting freely. Check mains power supply. Restart
centrifuge. If the error persists replace main board.
PT1000
PT1000
Main board
2-8
SERVICE
Error
Possible Error
Source
Corrective Procedure
Possible
spare part
E-019
Wrong rotor
installed,
old version of NVRAM
The rotor is decelerated with maximum braking.
Install correct rotor.
Install latest NV-RAM version.
Rotor
NV-RAM
E-020
Wrong rotor
installed,
Rotor coding
faulty,
Interference,
NV-RAM faulty
E-021
Sensor cover
faulty,
Interference
E-022
Sensor cover
faulty,
Interference
E-023
Sensor cover
faulty,
Interference
E-025
Latch failed,
Cable interrupted,
Main board failed
E-027
Latch or wires
broken
E-029
No rotor installed,
Motor/rotor
blocked,
Motor faulty,
No speed signal,
Motor driver on
main board faulty
E-030
Mains voltage too
low,
Main board failed
E-031
Hot motor,
no air circulation,
faulty over temp.
cut-out.
The rotor is decelerated with maximum braking.
Check rotor in other centrifuge. If rotor is found faulty,
return to factory for repair. DO NOT REMOVE THE CODE
RING!
Separate motor cables and signal cables, otherwise
interference is caused.
If the error persists, replace NV-RAM
The rotor is coasting freely.
Separate motor cables and signal cables, otherwise
interference is caused.
Replace sensor cover.
The rotor is coasting freely.
Separate motor cables and signal cables, otherwise
interference is caused.
Replace sensor cover.
The rotor is coasting freely.
Separate motor cables and signal cables, otherwise
interference is caused.
Replace sensor cover.
Check operation of stepper motor when pressing lid
button. Disconnect stepper motor from main board (X8)
and check resistance (12 = 46Ω, 34 = 46Ω). If
stepper motor/cable is ok, replace main board.
Switch 2 is closed when switch 1 is open = implausible.
Check micro switches and wires. Replace latch. If latch is
ok, replace main board.
The rotor is coasting freely. CHECK FOR NO ROTATION
OF ROTOR THROUGH LID WINDOW BEFORE
OPENING THE LID!
Check the motor/rotor for no blocks. Turn rotor by hand
and check for no abnormal noise and friction.
Close lid and press start. Check through window if rotor
starts turning. If rotor turns, check cables of sensor cover
and/or replace it.
If rotor does not turn, check winding resistance and
insulation resistance of motor. If motor is ok, replace main
board
The rotor is coasting freely.
Check mains power supply.
Replace Main board
The rotor is coasting freely.
DO NOT TOUCH THE MOTOR, ROTOR AND/OR
ADJACENT PARTS! BURN HAZARD! Wait for motor to
cool down. Check ventilation slots for cleanliness and
check fans for operation.
Turn rotor by hand and check for no abnormal noise and
friction.
Disconnect motor over temperature cut out from main
board (X11) and check it for continuity. Replace motor in
case of malfunction.
Rotor
NV-RAM
Sensor cover
Sensor cover
Sensor cover
Lid latch
Lid latch
Motor
Main board
Sensor cover
Main board
Motor
Fan
2-9
SERVICE
Error
Possible Error
Source
Corrective Procedure
E-033
No ventilation,
Pipes blocked,
Faulty over
pressure switch
E-034
Brake resistor
open,
main board faulty
E-036
Brake resistor
open or short,
Motor winding
short,
Main board faulty
E-038
Internal software
problem
E-040
Extreme
imbalance,
motor bearings,
motor phase
missing
Refrigerated units only:
The rotor is decelerated with maximum braking.
Check ventilation slots for cleanliness and check fans for
operation.
Disconnect over pressure switch from main board (X18)
and check it for continuity. Replace it in case of
malfunction. Check for blocks in the refrigeration pipes
(trained and authorized refrigeration engineers only)
The rotor is coasting freely.
Disconnect brake resistor from main board (X20) and
check resistance (120Ω). Replace if faulty, otherwise
replace main board.
The rotor is coasting freely.
Disconnect brake resistor from main board (X20) and
check resistance (120Ω). Replace brake resistor if faulty.
Disconnect motor from main board (X10) and check
winding resistance. Replace motor if faulty.
Otherwise replace main board
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
seconds before turning it back on. If the error persists,
replace main board.
The rotor is decelerated with maximum braking.
Check for imbalanced load. Check motor for smooth
turning. Disconnect motor from main board (X10) and
check winding resistance. Replace motor if faulty.
Otherwise replace main board.
E-041
Imbalance sensor
faulty
The rotor is decelerated with maximum braking.
Replace sensor cover.
E-045
E-046
E-048
to
E-052
E-053
to
E-054
E-060
The rotor is coasting freely.
During run a power outage happened. After power
recovery the rotor speed is 0. The rotor is turned at low
speed and no speed signal is detected.
See “E-29”
The rotor is decelerated with maximum braking.
Emergency lid
CLOSE LID IMMEDIATELY!
opening detected
NEVER OPEN THE LID WHILE THE ROTOR IS
during run,
SPINNING. Wait for rotor to stop.
Faulty micro switch
In case of faulty micro switches replace latch.
The rotor is coasting freely.
Internal software Wait for rotor to stop and turn the power switch off. Wait 5
problem
seconds before turning it back on. If the error persists,
replace main board.
The rotor is decelerated with maximum braking.
Internal software Wait for rotor to stop and turn the power switch off. Wait 5
problem
seconds before turning it back on. If the error persists,
replace main board.
Refrigerated units only:
The rotor is decelerated with maximum braking.
Compressor
DO NOT TOUCH THE INSIDE OF CHAMBER AND
control fault,
ROTOR WITH BARE HANDS! FREEZE HAZARD!
Temperature probe
Disconnect PT1000 from main board (X3) and check
fault
resistance (R = 1,000Ω @ 0°C or 1,078Ω @ 20°C).
Replace if faulty. Otherwise replace main board.
Power interruption
during run AND
speed signal error
Possible
spare part
Fan
TEV
OP switch
Brake
resistor
Main board
Brake
resistor
Main board
Motor
Main board
Motor
Main board
Sensor
cover
Sensor
cover
Main board
Lid latch
Main board
Main board
Main board
PT1000
2-10
SERVICE
Error
Possible Error
Source
E-072
Internal software
problem
E-074
Latch motor
broken / blocked,
Main board failed
E-077
Internal software
problem
E-078
Motor control fault
E-079
n > nrotor max +25
E-080
Internal software
problem
E-081
Internal software
problem
E-083
Brake resistor
overheated,
No air circulation,
Main board failed
E-098
Imbalanced load
E-101
to
E-104
Measurement
shows great
deviations
(+/- 5°C) to
expected values.
E-105
Internal software
problem
Corrective Procedure
Possible
spare part
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
Main board
seconds before turning it back on. If the error persists,
replace main board.
The rotor is decelerated with maximum braking.
Wait for rotor to stop and turn the power switch off. Wait 5
Lid latch
seconds before turning it back on. Check the latch by
Main board
opening and closing the lid. If faulty, replace lid latch.
Otherwise replace main board
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5
Main board
seconds before turning it back on. If the error persists,
replace main board.
The rotor is decelerated with maximum braking.
Wait for rotor to stop and turn the power switch off. Wait 5
Main board
seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
The controller is not able to control the rotor speed
Main board
properly. Replace main board.
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait
Main board
5 seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait
Main board
5 seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely.
DO NOT TOUCH THE BRAKE RESISTOR! BURN
HAZARD!
Main board
Check ventilation slots for cleanliness and check fans for
Brake
operation.
resistor
Disconnect brake resistor from main board (X20) and
Fan
check resistance (120Ω). Replace brake resistor if faulty.
Otherwise replace main board
The rotor is decelerated with maximum braking.
Wait for rotor to stop, open lid and check for imbalance,
greased trunnions, etc. Balance the rotor and start again. AV mounts
If the error persists check anti vibration mounts. Replace Sensor cover
mounts if worn or older than 3 years. If the error persists
replace sensor cover.
Refrigerated units only:
The rotor is decelerated with maximum braking.
Disconnect PT1000 from main board (X3) and check
PT1000
resistance
Main board
(R = 1,000Ω @ 0°C or 1,078Ω @ 20°C). Replace
PT1000 if faulty. Otherwise replace main board.
Check also for interference.
The rotor is decelerated with maximum braking. Wait for
rotor to stop and turn the power switch off. Wait 5
Main board
seconds before turning it back on. If the error persists,
replace main board.
2-11
SERVICE
Error
E-106
E-107
.
Possible Error
Source
Corrective Procedure
The rotor is decelerated with maximum braking. Wait for
rotor to stop and turn the power switch off. Wait 5
Main board failed
seconds before turning it back on. If the error persists,
replace main board.
The rotor is coasting freely. Wait for rotor to stop and turn
the power switch off. Wait 30 minutes to allow cooling
down before turning it back on. Clean ventilation slots.
No air circulation,
Remove dust from main board (unit disconnected from
Fan inoperative
mains!). Check fan (refrigerated units only). Replace fan
if faulty. If the error persists replace main board.
Possible
spare part
Main board
Fan
Main board
2-12
SERVICE
Test Points
Test Point
Unit Value
Conditions
Mains input
X16
230V / 120V
CAUTION! Mains potential!
Mains cable connected, power switch ON
Motor
X10
A-B 5.6 Ω
A-C 5.6 Ω
B-C 5.6 Ω
Brake resistor
X20
120 Ω
Over temperature
cut-out motor
X11
Over temperature
cut-out brake resistor
X9
Lid latch micro switches
X14
Lid latch stepper motor
X8
Ambient at 20°C, plugs disconnected from
main board.
Any phase to ground must have an infinite
resistance.
Ambient at 20°C, cables disconnected from
main board
15 VDC
0 VDC
Cables connected, power ON
Lid open
Lid closed
open
short
Cables disconnected, power OFF
Lid open
Lid closed
15 VDC
0 VDC
Cables connected, power ON
Failure
Good
open
short
Cables disconnected, power OFF
Failure
Good
Pin 1+4
0 VDC
2.5 VDC
Cables connected, power ON
Lid closed
Lid open
Pin 1+4
short
open
Cables disconnected, power OFF
Lid closed
Lid open
Pin 2+3
5 VDC
0 VDC
Cables connected, power ON
Standby
Stepper motor moves into zero state after lid has
been opened
Pin 2+3
open
short
Cables disconnected, power OFF
Standby
Stepper motor moves into zero state after lid has
been opened
Pin 5+6
0 VDC
2.5 VDC
Cables connected, power ON
Lid closed
Lid open
Pin 5+6
short
open
Cables disconnected, power OFF
Lid closed
Lid open
Pin 1-2 46 Ω
Pin 3-4 46 Ω
Ambient at 20°C, plug disconnected from
main board
2-13
SERVICE
Test Point
Unit Value
Conditions
lit
All cables connected, power switch ON,
lid closed
dimly lit
All cables connected, power switch ON,
lid open
lit
All cables connected, power switch ON
lit
All cables connected, power switch ON, lid open,
rotor installed, rotor / motor is turned by hand.
The LED must light 2 times during 1 revolution.
flashing
All cables connected, power switch ON, lid closed,
rotor installed, start pressed, rotor spinning. The
LED flashes 2 times per revolution. At speeds
above 2000 rpm the LED is lit.
5 V control circuit power
supply
LED V75 (green)
lit
All cables connected, power switch ON
24V control circuit power
supply
LED V79 (green)
lit
All cables connected, power switch ON
DC bus voltage
LED V41 DC BUS (red)
15 V control circuit
power supply
LED V79 (red)
Speed signal
LED V11 RUN (green)
2-14
SERVICE
System menu & Service menu
How to enter the system menu
The system menu allows the user to make advanced settings and read units values as additional
information for service calls.
To enter the system menu
1. Switch off the centrifuge
2. Press and hold any button on the overlay
3. Switch on the centrifuge
4. When
Enter SYSTEM Menu?
SYSTEM MENU
appears, release the button
5. Press
to enter the service menu
6. Use
to scroll through the menu.
7. To exit the system menu and save changes press
To exit the menu without saving the changes press
See page 2-16 for complete menu structure.
How to enter the service menu
The service menu provides guidance for troubleshooting, such as error history list, statistics
and tests.
To enter the service menu
1. Switch off the centrifuge
2. Press and hold buttons “Program 1” and “Program 2”
3. Switch on the centrifuge
4. When
Enter Service Menu?
SERVICE MENU
appears, release “Program 1” and “Program 2”
5. Press
to enter the service menu
6. Use
to scroll through the menu.
See page 2-17 for complete menu structure.
.
.
2-15
SERVICE
System menu structure
Use TIME UP and
DOWN to select the
desired language.
Language: English
SYSTEM MENU
End of run beep?
Yes
SYSTEM MENU
End of run flash? Yes
SYSTEM MENU
Keypad beep?
SYSTEM MENU
Beeper volume
Yes
3
SYSTEM MENU
Lcd powersafe?
Use TIME UP and
DOWN to select
YES or NO
Use TIME UP and
DOWN to set the volume
between 1 and 5
Yes
SYSTEM MENU
Auto lid open
yes
SYSTEM MENU
Use TIME UP and
DOWN to select
YES or NO
Programs only mode no
SYSTEM MENU
Software version
Software id:
xxxx Vxx
SYSTEM MENU
Software revision
NV-RAM version
NVram id:
xxxx Vxx
SYSTEM MENU
Cycle count total XXXXXX
SYSTEM MENU
NV-RAM revision
Total number of runs
2-16
SERVICE
2-17
Service menu structure
Total number
of runs
Number of
runs with this
type of rotor
Last 4 digits
of rotor code
Cycle count total XXXXXX
Cycles rotor XXXX: XXXXX
SERVICE MENU
SERVICE MENU
Use SPEED UP
and DOWN to
toggle between
screens
Last 4 digits
of rotor code
Error
number
Set speed
Up counting
number
Speed when
error occurred
View errorlist?
EXXX XXXX XXXXX XXXXX XX
SERVICE MENU
SERVICE MENU
Use SPEED UP
and DOWN to
toggle between
screens
Hours
Unit hours
Use TIME UP
and DOWN to
scroll through
lists
Minutes
XXXXXhXX
SERVICE MENU
View device stats?
Drive hours
XXXXXhXX
SERVICE MENU
SERVICE MENU
Lid lock cycles
Use SPEED UP
and DOWN to
toggle between
screens
Start button test?
SERVICE MENU
Use SPEED UP
and DOWN to
toggle between
screens
XXXX
SERVICE MENU
Total counter of lid
open / close cycles
Press START to start the test.
Then press the buttons as they are
requested in the display. In case of
malfunction (no entry is recognized
by the micro controller), the next
button will be requested to press
after 30 seconds.
1. No display
element is lit
Start display test?
SERVICE MENU
»»»»»»»»»»»»»»»»»»
»»»»»»»»»»»»»»»»»»
2. All display
elements are lit
Use TIME UP
and DOWN to
toggle between
screens
SERVICE
Imbalance Behavior
 Install a rotor from the table below in unloaded condition (without adapter or other inserts)
Rotor
Rotor name
75005701
75005702
75005703
75005704
75005635
75005706
75005637
75005600
75003623
75005719
75005715
75003473
75005643
TX-150 Rotor
TX-150 Round Bucket
TX-150 Oval Bucket
TX-100S
TX-100
M-10 Rotor
MT-12 Rotor
HIGHConic Rotor
CLINIConic Rotor
MicroClick 30x2 Rotor
MicroClick 24x2 Rotor
Hematocrit Rotor
PCR Strip Rotor 8x8
Run through
weight (grams)
10
10
10
10
10
10
4
10
10
4
4
1 capillary
4
Cut off weight
(grams)
20
20
20
20
20
30
12
30
30
12
12
6 capillary
8
 Insert rotor dependent cut-off weight in all buckets or Sample holders one after the other. The
centrifuge must show an “Imbalance” message and stop.
 Insert the run through weight in the same manner, the centrifuge must run through 4 times to
maximum rotor speed without giving an alarm.
 Always use a weight which can be placed at the bottom of the bucket or sample holders (e.g.
screw nuts and flat washers with cable tie)
Cleaning of Instrument Parts
ATTENTION - WARNING!
The electrical and electronic components must not be cleaned with moist detergents!
For Cleaning the centrifuge housing or its accessories see user manual.
 Electronic components
Clean dusty components carefully with a dry and soft brush and remove loose dust with a
vacuum cleaner.
 Fans (refrigerated units only)
Scratch off carefully with a knife or similar tool the crusted dirt from the fans’ blades. Resulting
grooves or marks must be removed subsequently with a fine abrasive cloth. Loose dirt is to
remove with an absorbent cloth or vacuum cleaner.
 Vent holes
Remove dust and dirt from the vent holes of the unit und clean the condenser (refrigerated
units only) using a brush and vacuum cleaner.
2-18
SERVICE
2-19
Electrical Safety Check
ATTENTION!
A final electrical safety check must be performed after each maintenance and/or repair!
 Resistance check of protective conductor
The measuring value of the resistance between the mains plug's grounding pin and the
grounding conductors of the motor, electronic chassis and the casing must not exceed 200m
Caution!
 Insulation resistance check
Check also the insulation resistance between the poles of the mains plug and the grounding
conductor; the resistance value must be more than 2 M
 Accessible current measured to IVD medical equipment regulation
The accessible current must not exceed 0.5 mAmps in single fault condition (interrupted
protection earth wire)!
Steckergehäuse / plug-in casing
1500 
±5%
0,22µF
±5%
0,022µF
±5%
N (L)
PE
V
AC
Specifaction for the meter
- TRMS, DC - 5kHz or more
- Input resistance > 1M
- Tolerance 5% or better
- Crest Factor 5 or better
500
±1%
L (N)
Spezifaktionen für Meßgerät
- TRMS, DC - 5kHz oder mehr
- Eingangswiderstand > 1M
- Toleranz 5% oder besser
- Crest Faktor 5 oder besser
10k
±5%
Körperstrom:
accessible current: I [mA] = U [mV] / 500:
Umax = 250mV  Imax = 0,5mA
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Block Functions
3-2
Main Board Functions
3-3
Power Pack
3-4
Intermediate Circuit
3-4
Brake Path
3-4
Frequency Converter
3-4
Micro Controller
3-4
Display
3-5
Speed Detection, Rotor Recognition, Imbalance Detection
3-5
Lid Lock System
3-5
3-1
FUNCTIONAL DESCRIPTION
Block functions
The Megafuge 8 / ST8 / SL8 is a non-refrigerated laboratory tabletop centrifuge with microprocessor
control, noise reduced induction drive motor and automatic rotor, speed and imbalance detection.
The unit is equipped with following boards and components:
 Instrument socket with inlet filter for mains cable
 Two poles mains switch with integrated thermal over-current release (230V: 5A, 120V: 10A)
 Harmonic choke (230V units only)
 Main board with microprocessor part and power electronics
 Backlit liquid crystal display
 Overlay keypad
 Motor cover with sensor board incl. speed, rotor and imbalance detection
 3 phase induction motor with integrated thermal over temp. cut out (C. O. 150°C)
 Lid lock with motorized opening and emergency release
 Brake resistor with over temp cut out
3~ MOTOR
REAR PANEL
LID LOCK
CHOKE (only 230V)
OVER TEMPERATURE
BRAKE RESISTOR
BRAKE RESISTOR
DISPLAY
MAIN BOARD
KEYPAD
3-2
FUNCTIONAL DESCRIPTION
Main Board Functions
The Main board is mounted on an aluminum swivel chassis in the front of the centrifuge behind the
front panel. The components on the main board are arranged in following function blocks:
 Noise filter and power pack for DC intermediate circuit with line voltage configuration (1)
 Power pack for low voltage supply of microprocessor part (2)
 Frequency inverter equipped with automatic loading (3) and voltage (brake) controlling
circuits (4)
 Microprocessor part with CPU and NV RAM (5)
 Lid lock control circuit with driving component for lid latch stepper motor (6)
 Speed, imbalance and rotor detection circuit (7)
 Display and keypad control circuit (8)
 Buzzer circuit (9)
 Exchangeable NV-Ram containing specific data of the unit (NV)
 Additional circuits for refrigerated models.
4
2
3
6
7
1
NV
5
9
8
3-3
FUNCTIONAL DESCRIPTION
Power Pack
The power pack consists of 1 transformer, 2 rectifiers (single diode) and 2 voltage regulators. It
generates the following low voltage levels:
5V VCC:
By switched-mode regulator A8499
Supplies all processors and its electronic components on main board, keypad
and display. The reference potential is GND.
24V:
Unregulated
Drives the lid lock stepper motor and the buzzer, supplies the LCD and the
relays K1, K2, K3 and K4.
The reference potential is GND.
15V:
By voltage regulator LM317
For protection circuit. CAUTION: The reference potential is U-.
Intermediate Circuit
The DC intermediate circuit serves as an energy store between the AC power input and the
transmitted motor performance. The intermediate circuit consists of a line voltage selection switch, a
heat-sink-cooled bridge rectifier and two reservoir capacitors which are charged whenever the
centrifuge lid is closed (K1 activated). The presence of the DC voltage is indicated by LED V41.
When switching the unit off, the DC voltage of the intermediate circuit is discharged across a path of
resistors.
Brake Path
Electrical power is fed back into the intermediate circuit during motor deceleration (motor acts as
generator). This braking power is transformed into heat by the connected resistor so that the
intermediate circuit voltage does not rise to an excessive level. The brake resistor is switched into the
intermediate circuit by a fast switching transistor (pulse-width modulation, synchronised by the double
mains frequency). This transistor is voltage dependent controlled by a self-acting stage (closed loop).
Frequency inverter
The 3-phased motor is provided with chopped direct voltage blocks (chopped frequency approx.
5kHz, amplitude is height of DC intermediate voltage). These blocks are variable in frequency and
pulse-width modulation, 120° de-phased. These 3 phases are controlled during acceleration, running
at set speed and deceleration (e.g. for small speed: low frequency and small pulse-width length will
be affected). The frequency inverter is protected against over current, over temperature and overvoltage.
Microcontroller (Central Processing Unit) Part
The controller block includes the central processor unit (CPU) LPC1764 programmed with software to
control the centrifuge and a data storage (NV-RAM). Current versions and revisions of software and
data can be seen in the system menu.
Software is loaded into the LPC1764 via a serial interface on the main board X6 and cannot be
upgraded in the field. The NV-RAM data can be updated by replacing the entire NV-RAM with one of
the latest revision.
NV-RAM data includes rotor parameters, such as max speed and g-force, acceleration and
deceleration profiles and imbalance behaviour.
3-4
FUNCTIONAL DESCRIPTION
3-5
Display
The LCD is attached to the front panel. The connection to the main board is done by a RJ45 cable.
Data transfer as well the low voltage supply of 5V is verified. The operating keys are managed by an
own connection.
Speed, imbalance and rotor detection
The motor cover contains the detection circuits for speed, rotor and imbalance. The LED V11 on the
main board indicates the function of the speed and rotor detection. A measurement of the signal is
not possible.
Rotor detection
4 magnets mounted on each rotors bottom are detected by a
Hall Effect sensor in the motor cover. The magnets are
alternately arranged in polarity on a ring around the rotors
centre. The gap between 2 magnets varies with different rotor
types, but is at least 20°.
The magnets are switching a flip-flop stage by which different
pulse lengths and pulse intermissions are generated during one
rotor rotation. By this signal the CPU is able to detect up to 65
different rotors and the correct direction of rotation, too.
After the rotor has been recognized this signal is used for the
redundant speed measurement.
Speed detection
A Hall Effect sensor in the rotor cover counts the passing by
magnets. As the 4 magnets are arranged alternating in polarity,
2 north and 2 south poles make one revolution.
For safety reasons the speed detection circuit is redundant and
the rotor detection circuit is used to detect the speed, too, after
the rotor has been recognized.
After the rotor has been recognized, the depending vibration
curve is loaded from the NV-RAM. If vibration, which is detected
by an accelerometer in the motor cover, exceeds this curve, an
imbalance alarm is triggered by the CPU.
4
Vibration
Imbalance detection
2
0
0
2000
rpm
4000
Lid lock system
The lid is closed by pressing the hook into the latch. Two micro switches monitor the correct position
of the hook and the emergency opening during the run. An alarm is triggered if one of these two micro
switches opens, while the rotor is spinning.
The latch is unlocked by a bi-directional stepper motor controlled by a stepper motor driver on the
main board. A micro switch is used for the 0-position finding after each opening and at power on.
For additional safety the motor driver is de-activated by a relay when the speed is above 120rpm.
6000
ELECTRICAL DIAGRAMS
ELECTRICAL DIAGRAMS
Overview
4-2
Power Supply 1
4-3
Power Supply 2
4-4
Frequency Inverter
4-5
Protection Circuit
4-6
Controller
4-7
Imbalance RPM
4-8
Key Control
4-9
Discharge your body before touching electronic components!
4-1
ELECTRICAL DIAGRAMS
3~ MOTOR
REAR PANEL
LID LOCK
CHOKE (only 230V)
OVER TEMPERATURE
BRAKE RESISTOR
BRAKE RESISTOR
DISPLAY
MAIN BOARD
KEYPAD
4-2
ELECTRICAL DIAGRAMS 4-3
Mains input -
R143
20R
Steady state condition
Masse
V35
Max Power = 500W
Imax@120Vac=6Arms(max)
6
9
C88
2nF2 - Y2
N.M.
3
DC+
+ 3
1
-
DC-
2
V37
BAS16
4
M4 mounting
1
LM393
D9B
V38
BC817-25
-
C90
1uF
450V
R156
33k
R157
75K
6
4
NK1
V39
BAS16
3
R151
33k
+ 5
7
high to C90 > 200V
Masse
R147
33k
C91
100nF
500V
R155
470K
8
Z6
K2B
PCJ-105D3M
C89
1200uF
250V
R150
470K
R149
10k
R154
10k
5
R153
150K
R146
33k
R145
75K
R148
75K
4
8
R152
150K
Z1
VR
K5B
40.61.7.024.0000
VR
LM393
D9A
Masse
U+
C15
2nF2 - Y2
250VAC
V40
TL431A
C93
47µF
25V
R159
12k
TP19
R158
33k
C92
1200uF
250V
R160
75K
V41
LED red
2
U-
3
N26119048
2
PCJ-105D3M
V42
BAS16
+24V
X9
2
1
3
R166
V46
BC817-25
6
2
link discharge
R165
10K
fan1 high speed
K6B
PCJ-105D3M
R164
10k
4k7
R292
TP16 10K
GND
7
K4A
40.61.7.024.0000
A
B
1
V45
BAS16
DC+
DC-
4
40.61.7.024.0000
K4B
DC+
V47
BZX84C5V1
V49
BAS16
R169
4K7
R170
2K2
5
DC-
D28
LTV-357T
V48
BC817-25
Conductor status
N26114329
R162
100R
V44
ES1D
2
R272
47R
DC+DC-
3
8
47R
K3A
4
1
2
1
47R
PCJ-105D3M
220nF
250Vac
R271
K1A
62.22.9.024.0300
to controller section
page 4-7
GND
U
R270
ZK
OT Brake Resistor
fan1
V43
4k7
BC817-25
V275LA10P
R163
C14
BC817-25 R171
compressor
GND
GND
TP17
V50
22k
22k
V51
R174
BZX84C5V1 1k
R175
100k
VCC
+24V
5
R173
REL_ON_Buff
GND
VCC
R172
4k7
C96
10nF
50V
R176
R177
22k
22k
N26114356
D30
LTV-357T
C97
10uF
6,3V
+24V
/overpressure
4
2
R178
1M
3
compressor
SELV
GND
R161
2
1
X19
Lumberg K09
C95
100nF
50V
K2A
DC+
DC-
X18
Lumberg K15
switch
Z1
M4 mounting
+24V
N
overpressure
6
2
4
1
fan
3
2
1
C94
2nF2 - Y2
250VAC
Z1
4
condensor
5
1
3
SW2
Netz 2pol
1
NK2
to supply 2 section
page 4-4
K3B
PCJ-105D3M
X17
Lumberg K37
to Protection Circuit - page 4-6
4
40.61.7.024.0000
+
3
K5A
7
6
4
+
8
1
7
2
R144
V275LA40A
-
1
2
Lumberg K46
TP18
~
U
62.22.9.024.0300
+
1
US1J
V36
GBPC1508W
K1B
+
X16
Mains Input
L15
2x7.3mH
9.3A
2
~
C86
2nF2 - Y2
N.M.
+
C87
1uF X2
275 VAC
Imax@230Vac=3Arms(max)
D29
SN74AHC1G14
VCC
R246
0R
1
GND
Z3
1
Z4
M4 mounting
M4 mounting
GND
GND
GND
Power Supply 1
ELECTRICAL DIAGRAMS 4-4
N
ZK
R217
PTC 6R C840
Pmax(tot) = 18W
V57
GBU404
Iout = 0.05A
-
D37
LM317
VR
+
~
3
R218
1K2
R219
1K2
R220
1K2
R221
1K2
V59
P6SMB200A
N.M.
V58
R224
1K2
R300
3K9
C123
3n3
250Vac
Y1-Type
NK1
C119
100nF
50V
V77
1N5362B
5W
V78
LED red
V61
US1J
+15Vprim
R222
C125
330µF
35V
+
L17
R243
0R
V62
5
R230
2M
0,25W
C130
22uF
50V
+
C140
100nF
C129
33R
ES1D
1
9
N.M.
Frequency
CONTROL
I-External
V-Monitor
MV2
680u
35V
C150
470nF(N.M.)
5
3
2
1
100nF
50V
C132
D38
A8499
R231
4K7
1
100uF
50V
2
3
R234
36K5
4
R233
475R
Boot
Vin
ENB
LX
TSET
GND
8
L18
22u@2.13A
TP14
R244
7
VBIAS
FB
GND
LED Green
GND
5
Iout = 0.5A
VCC
0R
6
R232
R299
1K
10K
C133
V75
LED Green
33nF
R236
1K5
N15468022
R240
6R8
V76
R301
5K6
V66
TL431A
R235
10K
R237
4K75
R238
30K
R239
3K16
V65
SS34
+
DRAIN
SOURCE
R250
56R (N.M.)
D40
LTV-357T
7
C128
470pF
200V
C131
1N5362B
5W
C152
R249 (N.M.)
(N.M.)
D39
TOP255YN
ES3D
PAD
V64
V79
C110
100nF
50V
9
R229
4R7
Iout = 0.5A
+24V
+
R228
5K1
C124
100nF
50V
TP12
C127
10nF
50V
+
V63
BZX84C30
R227
2
C135
470uF
10V
C134
100nF
50V
TP15
GND
R241
10K5
C141
100nF
C138
47uF
35V
GND
+
R245
0R
R247
0R
1
+
C136
100nF
500V
C122
47uF
35V
22u@2.13A
6
10
C137
100uF
400V
100nF
50V
R223
2K87
4
4
C120
+ C121
100uF
50V
249
U-
+
68pF
500V
Iout = 0.12A
0R
TP13
3
2M
0,25W
R242
2
VO
ES3D
C126
R226
TP11
L16
22u@2.13A
V60
T1
TRAF_B66208W 7
R225
1K2
VI
ADJ
~
1
NK2
Z2
M4 mounting
SELV
Power Supply 2
ELECTRICAL DIAGRAMS 4-5
+15V
+15V-W
+15V
C32 +
100uF
50V
C33
100nF
50V
8
R50
330R
R52
4K7
D15
1
6
2
5
3
C42
100nF
50V
R71
4K7
GND
PWM-UP
PWM-VP
PWM-WP
PWM-UN
PWM-VN
PWM-WN
R65
6K8
R66
6K8
R67
6K8
R68
6K8
R69
6K8
R70
6K8
DA
DB
D41
74HCT365
O1
O2
O3
O4
O5
O6
3
5
7
9
11
13
D19
6
5
3
GND
R61
4K7
4
5
R72
4K7
GND
4
D22
C44
100nF
MURS160T3
R60
6
2
3
GND
MURS160T3
R58
D20
10R
ACPL-P480
1
R64
330R
2
C35
10uF
35V
C50
100pF
6
2
5
3
4
C36
10uF
35V
+
1SMA5934BT3
C45
DZ4
10uF
24V
35V
+
DZ3
24V
R73
330R
R74
4K7
GND
D23
6
2
5
3
4
GND
R79
330R
R80
4K7
D24
4
5
6
R63
7
330R
C48
100pF
6
5
3
4
UP
D45
PS21964-AT
WP
330R
R76
2
1
C55
100pF
C58
330R
12
C57
100pF
W
21
VN1
1
14
C56
100pF
1
UN
1
VN
1
WN
R81
1M
FO
150K
X10C =
black
X10B
X10A
X10D
X10B =
brown
X10D =
X10A = blue
motor case
VNC
N
R82
1M
20
M54
snap-rivet
CIN
V8
BC807-25
R89
X10C
accessible !
16
15
R87
OT Motor Switch
C53
11
R77
+15Vprim
motor temperature sensor
VNC
10K
D25
ACPL-M50L
/inverter fault
4
3
2
1
X11
R83
VCC
R85
4K7
5
6
7
8
22
V
+15V
GND
23
U
VP
100nF
10
C54
100nF
ACPL-P480
L5
1K 100MHz
R75
330R
2
VWFB
C49
100pF
13
DZ1
1SMA5934BT3
24V
ACPL-P480
1
0.22µF
630Vdc
polyprop.
VVFB
C51
100nF
/Enable Gate
C40
9
ACPL-P480
1
VUFB
C46
100nF
100nF
GND
U+
C43
100nF
330R
C47
100nF
24
P
C39
100nF
1SMA5934BT3
R62
330R
ACPL-P480
1
+
3
ACPL-P480
2
D21
D16
MURS160T3
R53
D18
10R
4
1
R59
330R
8
1
15
I1
I2
I3
I4
I5
I6
R57
4K7
GND
2
4
6
10
12
14
Vcc
16
GND
R56
330R
C38
100nF
VP1
DZ2
1SMA5934BT3
24V
C59
1nF
50V
CER
M55
snap-rivet
R84
1M
R86
470R
R88
0R033
2W
1
VCC
C34
100nF
R55
10R
Z5 (contact to frame (earth))
M4 mounting
U4K7
GND
SELV
ZK
Frequency Inverter
ELECTRICAL DIAGRAMS 4-6
U+
motor temperature sensor
U+
R179
4R7
forward breakover voltage
378V - 392V
+15Vprim
+15V
X20
Brake Resistor
1
V52
US1J
R180
470K
2
R181
1K
R182
470K
R183
1K
R184
470K
R188
1M
C98
10nF
50V
R185
4K7
R190
220R
C100
10uF
35V
8
+
R194
10K
3 +
4
2 -
C102
10uF
6,3V
V55
TL431A
R198
6K8
R196
68K
D6A
MC33072ADG
D33
LTV-357T
R192
680R
GND
V53
SPP20N60C3
1
C99
10nF
50V
D32
LTV-357T
R189
470K
GND
V54
TL431A
R195
10K
R197
5K6
C104
22pF
50V
GND
C103
1uF
10V
C101
1uF
10V
U-
TP25
overtemperature motor
D6B
MC33072ADG
VCC
link discharge
R201
750k
R202
4K7
C148
100nF
50V
up 210V down 205V
VCC
C105
100nF
50V
R205
C107
100nF
50V
8
R207
750k
2
R204
4K7
3 +
R206
10K
power low
2M2
4
D7A
LM393
out
4
/overvoltage
420V (Typ)
GND
VCC
C106
100nF
50V
GND
1
2 R209
18k
GND
B
TP24
5
D49
SN74AHC1G08
1
A
7
6 R200
10K
Vcc
5 +
3 GND
V56
BAT54
D34
LTV-357T
R212
GND
8
10K
5 +
7
4
6 -
ZK
D7B
LM393
SELV
Protection Circuit
ELECTRICAL DIAGRAMS 4-7
Reset 5V
3 Reset 5V
13
GND
5
6
7
8
VSS1
VSS2
VSS3
VSS4
VSS5
VSS6
C19
10nF
1R
1K
0,1%
VSSA
31
41
55
72
83
97
1R
L2
R263
VSSA
C172
10nF
50V
/CS1
13
GND
14
7
D48E
74HCT14
10
100R
100R
R45
100R
14
7
14
7
3
3 GND
1
VDD
7
14
7
14
14
7
14
7
VCC
D3E
74HC14
10
14
4
50V
C29
100nF
50V
5
6
TXD0
RXD0
11
12
10
9
R268
33R
H2A
IR Socket
C2+
D14
ST3232C
C2-
C1+
C1-
V-
V+
Din1
Rout1
Din2
Rout2
Dout1
Rin1
Dout2
Rin2
V67
AO3414
GND
VCC
X21
4
3
2
1
C147
100nF
50V
1
3
2
14
13
7
8
50V
C28
100nF
Serial Interface
X6
2 + + 1
4 + + 3
6 + + 5
8 + + 7
10 + + 9
50V
_MR
X7
LCD Interface
VCC
+LED 1
2
3
4
5
6
7
8
GND
+3.3V
1
2
3
4
5
6
7
8
Pinning RJ45 Buchse:
Pin1 LED1+24V
Pin2 +5V
Pin3 SCLK
Pin4 GND
Pin5 MTSR
Pin6 GND
Pin7 CS1
Pin8 GND
Shield GND
R43
33K
GND
JP1
JUMPER
2
1
R322
22K
V69
BC817-25
V70
BAT54
GND
4
3
2
1
Debug Interface
GND
C27
100nF
GND
R44
22K
V68
BC817-25
C31
10uF
6,3V
TSAL7200
940nm
H2
D47C
GND R269
74HCT14
1K
6
R265
100R
GND
JP3
JUMPER
2
1
GND
PWM-FAN
7
C24
100nF
50V
+3.3V
V7
R47
R46
PWM-Buzzer
GND
shield1
D48F
74HCT14
12 11
GND
GND
D48D
74HCT14
8
/RST
R258
10K
+3.3V
GND
shield0
14
D48C
74HCT14
6
9
D47E
74HCT14
10 11
GND
R264
100R
D1C
74HC14
R28
47R
9B
5
D47D
74HCT14
8
C149
100nF
50V
lid lock closed
5
GND
9A
MOSI
R315
4K7
5
VBAT
14
7
6
C26
100nF
R24
100K
C23
100nF
50V
C25
100nF
50V
5
V6
BC807-25
7
14
+3.3V
R35
10K
R259
10K
1
7
TRST_N
TDI
TMS/SWDIO
TCK/SWDCLK
RTCK
TDO/SWO
7
1
3
5
7
9
11
13
15
17
19
REL_ON_Buff
Stepper Motor Reset
11
GND
D48B
74HCT14
4
11
GND
rpm
Rotordetection
/LID CURR
R37
D48A
74HCT14
2
3
R312
4K7
V9
MCP9701A
2 out
PWM-WN
PWM-WP
imbalance
BC817-25
14
X4
+
+
+
+
+
+
+
+
+
+
+3.3V
PWM-VN
PWM-VP
D1E
74HC14
10
D2F
74HCT14
12
VCC
PWM-UP
P2.5
P2.6
P2.7
P2.8
R36
4K7
1K@100MHz
14
+
+
+
+
+
+
+
+
+
+
9
TXD
RXD
FAN
/Steps
+3.3V
47K
SCLK
GND
R321
4K7
+24V
R25 R26 R27 R15 R16
10K 10K 10K 10K 10K
+3.3V
2
4
6
8
10
12
14
16
18
20
VCC
/Curr-reduc
Display On-Off
+3.3V
C22
10uF
6,3V
C171
1uF
50V
TP29
L6
R23
4K7
GND
Fault-SM
PWM-UN
R19
10K
+
1K@100MHz
13
GND
GND
GND
VDDA
10K
PT1000_ON
REL_ON
/DIR
+3.3V
VDDA
fan1
D2C
74HCT14
fan1 high speed
6
5
/Enable Gate
+24V
14
4
3
2
1
R18
V5
BC807-25
7
1
2
1
2
R14
19
JTAG_RTCK
JTAG_TDO
JTAG_TDI
JTAG_TMS
\JTAG_TRST
JTAG_TCK
GND
L3
1K 100MHz
R10
84
N.C.
RTCK
100
TDO/SWO
1
TDI
2
TMS/SWDIO
3
TRST_N
4
TCK/SWDCLK 5
SW1
N.M.
X3
2,5mm
42
P4.28
P4.29
D2B
74HCT14
4
4
2
16
_MR
82
85
REL_ON
13
D47F
74HCT14
12
Vcc
RESET
/overpressure
/RST
75
74
73
70
69
68
67
66
65
64
53
52
51
50
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P2.8
P2.9
P2.10
P2.11
P2.12
P2.13
P3.26
P3.25
1
2
GND
RESET
TP27
26
27
/fan1 high speed
15
MR
GND
Vcc
4
R252
0R
@40MHz
/REL_SM
compressor_CMD
D13
MCP1319MT-29
5
GND
LPC1764FBD100
7
GND
+3.3V
50V
100nF
C21
8
VCC 7
/WC 6
SCL 5
SDA
E0
E1
E2
VSS
CX1
4x470pF
R8
3K3
R253
3K3
GND
D11
/RST
95
94
93
/fan1
92 /fan1 high speed
91
90
89
88
87
86
32
33
34
PT1000_ON
35
Fault
36
37
Display On-Off
38
39
40
43
44
45
21
20
P1.0
P1.1
P1.4
P1.8
P1.9
P1.10
P1.14
P1.15
P1.16
P1.17
P1.18
P1.19
P1.20
P1.21
P1.22
P1.23
P1.24
P1.25
P1.26
P1.27
P1.28
P1.29
P1.30
P1.31
D4
SN74AHCT1G00D
GND
GND
3
compressor
1
17
\RESET 14
\RSTOUT
P0.0_SDA1
P0.1_SCL1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P0.8
P0.9
P0.10
P0.11
P0.15
P0.16
P0.17
P0.18
P0.19
P0.20
P0.21
P0.22
P0.23
P0.24
P0.25
P0.26
P0.27
P0.28
P0.29
P0.30
11
10
1
2
3
4
R6
3K3
GND
R314
4K7
7
M24C128WBN6
D12
R7 +3.3V
3K3
NM
22
XTAL1 23
XTAL2
VREFN
VREFP
14
7
D12A
8-pin Socket
P0.20
P0.21
C17
22pF
50V
/fan1
C13
100nF
50V
14
MOSI
/CS1
C144
100nF
50V
VCC
C18
22pF
50V
D2A
74HCT14
2
1
14
SCLK
D1D
74HC14
8
9
lid closed
compressor_CMD
GND
7
P0.7
P0.8
P0.9
/EN
7
1
RTCX2
RTCX1
46
47
98
99
81
80
79
78
77
76
48
49
62
63
61
60
59
58
57
56
9
8
7
6
25
24
29
30
TXD0
RXD0
D1A
74HC14
2
R313
4K7
R3
4K7
15
12
D1B
74HC14
Conductor status
GND
4
14 7
3
18
16
GND
14
7
GND
GND
overtemperature motor
C10
1nF
50V
VDD3.3_reg_2
C9
1nF
50V
VSSA
VDDA
14
C143
D1F
100nF
74HC14
50V
12 GND
13
power low
B
Fault
VDD3.3_reg_1
2
4
out
96
VCC
VDD3.3_4
D42
SN74AHC1G08
1
A
GND
/Inverter fault
SELV
J1
12.0 MHz
71
/overvoltage
C1
100nF
50V
C11
100nF
50V
VDD3.3_3
C3
10uF
10V
C12
100nF
50V
54
C4
10nF
50V
C16
100nF
50V VCC
VDD3.3_2
4
7
5
28
Byp
VDD3.3_1
Vout
Ven
R4 R5
4K7 4K7
+3.3V
5
Vin
2
3
Vcc
C5
100nF
50V
3 GND
1
VCC
C8
C7
100nF 100nF
50V
50V
C6
100nF
50V
C2
100nF
50V
14
+3.3V
D10
LP3985 3.3V
GND
VCC
R42
33K
V71
BAT54
GND
GNDGND
Controller
PCJ-105D3M
ELECTRICAL DIAGRAMS 4-8
10
+T
-T
R
Q
1
V10
BAS16
/LID-CURR
R119
R120
4K7
4K7
V80
BC807-25
lid lock closed
C79
1nF
50V
R303
R304
100k
100k
GND
R117
R118
4K7
4K7
R266
10k
GND
V22
BAS16
lid closed
C78
1nF
50V
V81
BC817-25
GND
Stepper Motor Reset
GND
C173
1nF
50V
R309
R310
4K7
4K7
8
7
6
5
R307
10k
VCC
R121
10K
GND
R305
K6A
1
2
3
4
7
11
D43E
74HCT14
10
/Reset 5V
3
R283
1K8
C166
820pF
R103
1K8
C164
820pF
R280
100K
X14
JST stehend
1
2
3
4
5
6
2
2
1
1
Lid Lock Switch
Stepper motor reset
R286
33K2
VCC
R285
33K2
1
21
L21
300R@100MHz
L22
300R@100MHz
8
16
X8
1
2
3
4
1
2
3
4
10
JST stehend
L23
300R@100MHz
1R
1W
GND_1
V13
BC817-25
V12
BC817-25
R108
15K
C112
820pF
VCC
2
R104
1K8
L20
300R@100MHz
R282 R281
1R
1W
GND
5
SENSEB
OUT2B
SENSEA
3
RCB
R279
100K
C165
220nF
C167
220nF
9
H/F
GND_1
VSB
17
VSA
VCP
20
22
15
CONTROL
R284
1K8
R289
100K
C75
5n6F
50V
REL_SM
R109
4K7
R110
15K
R111
4K7
C113
820pF
Lid Switch
L4
1K 100MHz
VCC
C114
100nF
GND
DC+DC-
R11 GND
1
4K7
R306
100k
12
RCA
R287
4
13
D43C
74HCT14
6
/Curr-reduc
100k
RESET
100K
14
C146
100nF
PCJ-105D3M
GND
V21
OUT2A
D51
EN
OUT1B
14
7
7
14
5
GND
Vcc
B
3
2
SN74AHCT1G08
4
L12
1K 100MHz
8
1
7
2
6
3
5
4
OUT1A
7
13
out
5
23
5
D43F
74HCT14
12
SH1
GND
L6228D
D43B
74HCT14
4
9
VCC
FDN304P
14
14
D43D
74HCT14
8
VCC
C77 +
100uF
50V
CW/CCW
VCC
/LID-CURR
Low = No Fault
R116
4K7
2
CLOCK
VREFB
14
0V
Low = Relay closed
Fault-SM
1
GND
Low = drive enabled
/REL_SM
GND
D43A
74HCT14
2
GND
3
/EN
V15
BAT46W
C161
220nF
GND
VREFA
One step ON
each falling edge
3.3V
Low = Motor current ON
220nF
V1
BAT46W
D52B
LM393
VBOOT
C74
1nF
50V
100R
GND
/LID CURR
C160
6
GND 7
GND 18
GND 19
GND
1
/DIR
10nF
50V
C159
10nF
50V
R107
F = 150-800Hz
C169
100nF
50V
4
C111
R101
1K2
6
C71
100nF
50V
GND
R106
1K
5
GND
R302
15K
C76
100nF
50V
4
VCC
R251
4K7
R296
4K7
/Steps
3 GND
Vcc
16
R293 R291 VCC
4K7 4K7
Rotordetection
A
+ 5
OUT
V+
GND
Vin+ Vin-
GND
24
GND
-
1
2
3
VCC
2
7
GND
C72
100nF
50V
D52A
LM393
R295
0R5
1W
D35
INA193
R297
27K
+ 3
1
VCC
R100
3K6
7
R105
100k
C73
1nF
50V
Reset 5V
270K
GND
L10
100mH
D46
R298
8
3
-
D2E
74HCT14
10
11
C170
100nF
50V
GND
R99
4K7
N5468902
VCC
9
14
TP67
R102
1K
SPEED 2
1
Vcc
GND
CX
GND
GND
K7B
PCJ-105D3M
REL_SM
4
12
11
Q
7
GND
GND
15
7
V20
BC817-25
4k7
GND
RC
V11
LED Green
GND
C68
10uF
6,3V
X13
L11
JST stehend
1K 100MHz
1 4
5
1
2
3
6
2
3 2
7
3
1
8
14
R294
4
out
11
GND
GND
B
R308
10k
SELV
GND
R311
10k
5
GND
C65
1uF
10V
R98
10K
R97
1K
A
4
2
D26
SN74AHCT1G00D
3
GND
GND
Q
1
2
8
C66
1nF
50V
GND
+T
-T
out
N5469480
N5468836
7
R95
1K C67
R96
100nF
100k
50V
6
B
GND
4
DC-
D8
SN74AHCT1G08
5
9
L8
100mH
R94
1K
Q
A
D5B
74HC4538
13
C63
100nF
D2D
74HCT14
8
14
GND
GND
CX
R
4
5
TP68
GND
SPEED +
UNBALANCE
1
RC
2
R93
1M
8
L7
1K 100MHz
5
6
7
8
2
R248
33K
14
4
3
2
1
C64
1uF
10V
R91
NM
7
X12
JST stehend
1
1
2
2
3
3
4
4
R261
33K
3
C61
10nF
50V
Vss
imbalance
VDD
D5A
74HC4538
3 GND
C60
100nF
50V
R92
220K
R90
33K
1
2
D31
SN74AHCT1G08
/Reset 5V
VCC
+24V
DC+
4
VCC
rpm
V18
BAS16
C168
100nF
K7A
1
VCC
GND
VCC
GND
Imbalance RPM
ELECTRICAL DIAGRAMS 4-9
V27
V29
V25
V28
V30
V26
V24
V23
+3.3V
R317
4K7
R318
4K7
P0.7
P0.8
P0.9
R123
1K
Reset 5V
C80
100nF
50V
GND
VCC
6
4
5
G1
G2A
G2B
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
15
14
13
12
11
10
9
7
GND
1
8
7
6
5
8
7
6
5
+
+
+
+
+
+
+
+24V
3.3V
0V
V32
BC807-25
2
7
1
2
3
4
1
2
3
4
1
3
5
7
9
11
13
R126
27R
V31
BC807-25
1
1
1
1
1
1
1
1
D47A
74HCT14
R1
R127
4K7
(Fpwm = 4KHz PWM 100% low = Buzzer OFF)
VCC
100K
14
3
V2
BC817-25
R13
+
H1
SMA-17
R12
10K
V34
BC807-25
D47B
74HCT14
C52
1uF
50V
1K
-
4
7
P0.21
R17
1
75K
R129
27R
R128
4K7 V33
BC807-25
D17A
MC33072ADG
2 -
C37
100nF
50V
+3.3V
R320
4K7
3 +
PWM-Buzzer
LEDblock1
C41
100nF
50V
GND
+
R125
4K7
14
R319
4K7
3
3
3
3
3
3
3
3
X15
connecting plug cod
GND
+3.3V
P0.20
A
B
C
8
GND
1
2
3
4
VCC
1K 100MHz
1K 100MHz
2
4
6
8
10
12
14
VCC
L13
L14
D27
74HCT138
R122 1K
R124 1K
+
+
+
+
+
+
+
R316
4K7
BAT54
BAT54
BAT54
BAT54
BAT54
BAT54
BAT54
BAT54
GND
R130
4K7
LEDblock2
VCC
R131
100k
R133
330R
R29
47K
C82
1nF
50V
GND
5V
GND
VCC
14
1
R20
PWM-FAN
C81
100nF
50V
R134
100k
GND
R136
330R
C83
1nF
50V
7
P2.6
D3A
74HC14
2
5 +
0V
VCC
R135
1K
+24V
9
7
P2.5
D3D
74HC14
8
14
R132
1K
(Fpwm = 4KHz PWM
100% high = FAN OFF)
6 -
10K
C70
100nF
50V
R21
10K
V16
L1 BAS16
3
4
V3
STD12NF06L
R22
1K
7
D17B
MC33072ADG
R30
1K
X1
2mm
2
1
1
2
200R 300MHz
C145
+
C151
100uF
50V
100nF
50V
FAN
V4
MMSZ5242B
12V-0.5W
GND
GND
GND
VCC
R137
100k
R139
330R
14
3
C84
1nF
50V
7
P2.7
D3B
74HC14
4
14
R138
1K
13
D3F
74HC14
12
7
GND
VCC
GND
14
D3C
74HC14
6
R142
330R
5
C85
1nF
50V
7
R141
1K
P2.8
R140
100k
1
2
GND
Key Control
DISASSEMBLY OF INSTRUMENT PARTS
DISASSMBLY OF INSTRUMENT PARTS
Disassembly of Mechanical Parts
5-2
Front Panel
5-2
Back Panel
5-2
Gas Lid Stay
5-2
Lid
5-2
Gasket
5-2
Bowl
5-3
Casing
5-3
Replacement of Electrical Components
5-4
NV-RAM on the Main Board
5-4
Main Board
5-4
Lid Latch
5-4
LCD
5-5
Keypad
5-5
Sensor Cover with Speed, Imbalance and Rotor Detection
5-5
Brake resistor with Over Temp Cut Out
5-5
Replacement of Drive Components
5-6
Drive Motor
5-6
Anti Vibration Mounts
5-6
Removal of AutoLock
5-7
Removal of AutoLock
5-7
Removal of Stuck Rotors
5-8
Checking the AutoLock
5-8
Before disassembling any parts, switch off the unit and pull out the mains
plug.
5-1
DISASSEMBLY OF INSTRUMENT PARTS
Disassembly of mechanical parts
Front Panel
Open the lid, switch off the unit and pull out the mains plug
Remove the 2 screws on top of the front panel
Pull the front panel up and lift it off.
Disconnect wiring from display and overlay adaptor board
Back panel
Switch off the unit and pull out the mains plug.
Remove the 7 screws attaching the back panel to the casing.
Tilt the panel down and unplug the cables.
Gas lid stay
Open the lid
Remove the cotter pin from the joint block with help of a striker
pin and a hammer.
Unscrew the gas lid stay from its bottom holder counter
clockwise.
Take out the gas lid stay to the top.
Lid
Open the lid, switch off the unit and pull out the mains plug
Remove gas lid stay from top joint block
Remove the 4 screws attaching the lid hinges to the main
frame.
When reassembling the lid take care that the lid bolt fits the
casing hole centric.
The lid hook must be adjusted to a visible length of 42mm.
42mm
5-2
DISASSEMBLY OF INSTRUMENT PARTS
Gasket
Remove the 3 screws hidden by the gasket that are attaching
the inner bowl and the gasket to the outer casing.
Slightly lift the bowl together with the gasket and take the
gasket of the bowl.
Bowl
Remove the AutoLock head from the motor.
Remove the sensor cover.
Remove the 3 screws hidden by the gasket that are attaching
the bowl to the outer casing.
Lift the bowl out to the top.
Casing
Remove the front panel.
Remove the back panel.
Remove the main board.
Remove the AutoLock head and the sensor cover.
Remove the bowl.
Remove the 4 screws attaching the casing to the bottom plate.
Lift the casing off.
5-3
DISASSEMBLY OF INSTRUMENT PARTS
Replacement of electrical components
NV-RAM on the main board
Before replacing the NV-RAM enter the system menu and note
the version and revision number.
Remove the front panel.
Remove the 4 screws at the swivel cassis and flip down the
main board.
ATTENTION - Discharge your body before handling
CMOS components!
Use a chip removal tool or a small screwdriver to pull the NVRAM out of its socket.
After reassembly check the version and revision number of the
new NV-RAM in the system menu.
Main board
Remove the front panel.
Remove the 4 screws at the swivel cassis and flip down the
main board.
Disconnect all plugs and cables.
Remove the 2 screws attaching the swivel chassis to the
casing.
ATTENTION - Discharge your body before handling
CMOS components!
Remove the NV-RAM and place it on the new main board –
new main boards are delivered without or with an empty
NV-RAM.
ATTENTION - When installing a new main board, make sure
that the voltage selection switch is set to the correct voltage!
Lid latch
Remove the front panel.
Remove the 4 screws at the swivel cassis and flip down the
main board.
Disconnect the micro switches and the stepper motor from the
main board (X14 and X8) and the grounding wire from the latch.
Remove the two screws attaching the latch to the casing.
When reinstalling the latch allign it in a way that the lid hook
moves in and out smoothly.
5-4
DISASSEMBLY OF INSTRUMENT PARTS
LCD
Remove the front panel.
Remove the 4 screws attaching the LCD to the front panel
Keypad
Remove the front panel.
Disconnect the overlay from the overlay adaptor board.
Use a screwdriver, knife or similar to remove a corner of the
overlay from the front panel. Pull the overlay off.
Clean the surface of the front panel from all glue remainders.
Sensor cover with speed, imbalance and rotor detection
Open the lid.
Remove the front panel and flip down the main board.
Disconnect the sensor cover from the main board (X12 and
X13).
Remove the AutoLock head from the motor.
Remove the 5 screws attaching the sensor cover to the motor.
Attach a string to the cables before pulling them through.
Remove the sensor cover.
Use the string to pull the cables of the new sensor cover
through.
Brake Resistor with over temp. cut out
Remove the front panel and flip down the main board.
Disconnect the brake resistor and its over temp. cut out from
the main board (X20 and X9).
Remove the back panel.
Remove the 2 screws attaching the brake resistor to its holder.
Attach a string to the cables before pulling them through.
Remove the brake resistor.
Use the string to pull the cables of the new brake resistor
through.
After reassembly check the function of the brake resistor during
a short test run (resistor must heat up during braking –
CAUTION it may be hot!).
5-5
DISASSEMBLY OF INSTRUMENT PARTS
Replacement of drive components
Drive motor
Open the lid.
Remove the front panel and flip down the main board.
Disconnect the motor and its over temp. cut out from the main
board (X10 and X11).
Remove the AutoLock and the sensor cover. It is not necessary
to pull out the ribbon cable of the sensor cover.
Remove the 3 nuts mounting the motor to the anti vibration
mounts.
Attach a string to the cables before pulling them through.
Remove the motor.
Use the string to pull the cables of the new motor through.
Anti vibration mounts
Open the lid.
Remove the AutoLock, sensor cover and motor.
It is not necessary to pull out the ribbon cable of the sensor
cover and the motor cable.
Loosen the anti vibration mounts with a 10mm spanner from the
top. It is not necessary to access the screws from underneath
the centrifuge.
Always replace all 3 anti vibration mounts and their sand paper
discs together.
5-6
DISASSEMBLY OF INSTRUMENT PARTS
Removal of AutoLock
This work requires AutoLock tool kit 70904693 or similar
tools.
Removal of AutoLock
Loosen the screw in the center of AutoLock head 4 turns using
a 3mm Allen key and the AutoLock key supplied with the tool
kit.
Insert the centering pin.
Use the puller supplied with the tool kit to pull off the AutoLock
from the motor cone.
Loosen the center screw completely and remove the AutoLock.
5-7
DISASSEMBLY OF INSTRUMENT PARTS
Removing stuck rotors
Remove stuck rotors by hitting the green AutoLock button with a
hammer. Depending on the type of rotor the AutoLock may be
removed first (fixed angle rotors only) and the AutoLock pin
supplied with tool kit can be used instead.
Checking the AutoLock
The inner and outer tapered surfaces of the Autolock must not
show signs of damage such as scratches or dents.
The torque pins must not be bent.
Check the correct locking of the AutoLock with the adaptor
supplied with the tool kit.
Check the correct un-locking with the adaptor and the AutoLock
pin supplied with the tool kit.
5-8
CALIBRATION (REFERENCE MEASUREMENT)
CALIBRATION (REFERENCE MEASUREMENT)
Introduction
General
Requirements
6-2
6-2
6-2
Equipment
6-2
Documentation
6-2
Preventive Maintenance
6-2
Calibration (Reference Measurement) Procedure
6-3
Speed
6-3
Time
6-3
Imbalance
6-4
Safety test
6-4
Documentation
6-5
6-1
CALIBRATION (REFERENCE MEASUREMENT)
Introduction
This chapter describes the calibration work to be performed on a yearly basis.
A calibration certification form can be found in the attachment B-1.
General
Successfully completing the preventive maintenance checklist and calibration procedure as outlined
will ensure that the instrument is properly maintained and calibrated to Thermo Scientific
specifications.
Requirements
Equipment

Optical (Laser) tachometer

Stopwatch

Weights according to rotor table

Safety Tester
Note: Check calibration due date on all test equipment before starting the procedure.
Documentation

Service manual

Centrifuge operating manual

Preventive maintenance checklist (A-1)

Calibration certification form (B-1)

Certification label

Certificate of calibration for each piece of test equipment used to perform the calibration

Training certificate
Preventive maintenance

Perform preventive maintenance checks as outlined in the service manual to ensure the
instrument is in good working order before performing any calibrations.

Complete the preventive maintenance checklist. (A-1)
6-2
CALIBRATION (REFERENCE MEASUREMENT)
Calibration (reference measurement) procedure
Speed
Install a rotor and attach a piece of reflecting tape (or black tape
on reflecting rotors) near the center of the rotor. Close the
centrifuge lid.
Set the speed to 1000
000 rpm and start the centrifuge. When the
display shows 1000 rpm wait for 10 seconds. Use an optical
(laser) tachometer and measure the speed of the rotor through
the window in the centrifuge lid. Record the measured speed and
the displayed speed in the speed section of the certification form.
Set the speed to rotor maximum.
imum. When the display shows the set
speed wait for 10 seconds and measure the speed through the
window. Record the measured speed and the displayed speed in
the speed section of the certification form.
Determine whether the speeds recorded meet the specifications
on the form. If the specifications are met, this test is finished. If
the specifications are not met, replace the main board, as
adjustments are not possible and repeat the test.
There is no possibility the measure the speed signal of the
centrifuge itself!
Time
Install a rotor and close the lid. Set the speed to 1000 rpm and
the time to 10 minutes. Start the centrifuge and the stopwatch at
the same time. Stop the stopwatch when the time section of the
display shows 0. Record the measured time in the time section of
the certification form. Determine if the time value recorded meets
the specifications in the form. If the specifications are met, this
test is finished. If the specifications are not met, replace the main
board, as adjustments are not possible and repeat the test
6-3
CALIBRATION (REFERENCE MEASUREMENT)
Imbalance
This test is only to be performed by a trained and authorized
service engineer!
Refer to Service manual chapter 2 – “Imbalance behavior” for cut
off and run through weight table.
Install a rotor. Place the rotor dependent cut off weight in one of
the buckets / cavities and close the centrifuge lid. Set the speed
to rotor maximum and press start. The centrifuge must shut off
with an imbalance alarm sometime during acceleration.
Repeat this test in 3 more positions, each displaced by 90°.
Repeat the test with rotor dependent run through weight.
Determine whether the cut off and run through weights meet the
specifications in the service manual and record the rotor type, cut
off and run through weight in the imbalance section of the
certification form. If the specifications are met, this test is
finished. If the specifications are not met, replace the main board,
as adjustments are not possible and repeat the test
Safety test
Perform an electrical safety test according to the instruction
manual of the tester.
The test should consist of
Grounding resistance check
Insulation resistance check
Earth leakage current check
Record the measured values in the safety test section of the
calibration form
Determine whether the values recorded meet the specifications
on the form. If the specifications are met, this test is finished. If
the specifications are not met, check for missing grounding
connections and / or faulty parts.
6-4
CALIBRATION (REFERENCE MEASUREMENT)
Documentation
After filling in the certification information complete the following documentation:






Log test equipment data on calibration certification form.
Review P.M.checklist and calibration certification form to ensure that all data and required
information has been recorded properly.(including your signature and date)
Fill out a certification label and place it on the right side of the centrifuge where visible or at a
location selected by the customer.
Ask the customer to sign the calibration certification form and place a copy in the customer’s
Certification Record Book for that centrifuge.
Place copies of the P.M.checklist and Field Service Report in the same Record Book.
Provide copies of your training certificate and test equipment calibration certificates if
requested by the customer.
6-5
SPARE PARTS
SPARE PARTS
Front Panel
7-2
Front View
7-3
Back View
7-4
Top View
7-5
Drive
7-6
Spare part numbers and spare parts are subject to change in case of technical upgrades or
supplier change. New specifications and part numbers are announced through technical
service bulletins.
7-1
SPARE PARTS
Front panel
Keypad
20059014
Front panel
Version
Heraeus
Sorvall
Thermo
20150285
Keypad adaptor
Part number
20059701
20059703
20059705
20150316
Display
20290706
O-Ring
20480320
Screw
20480317
Washer
7-2
SPARE PARTS
Front view
20059030
Motor
20058389
Gasket
70903020
Latch
20059092
Brake resistor
20059164
Harmonic choke
70903033
Main board
20059094
Keypad cable
NV-RAM
Version
230V
120V
100V
Part number
70904751
70904753
70904755
20059093
Display cable
7-3
SPARE PARTS
7-4
Back view
20059092
Brake resistor
20059098
Gas spring
20059189
Gas spring
coupling
70903021
Lid Assembly
20059168 - 230V
20059690 - 120V
Inlet filter
20059071
Hinge
20059077
Foot
20059169 - 230V
20059691 - 120V
Power switch
SPARE PARTS
Top view
70903021
Lid Assembly
20059071
Hinge
20059098
Gas spring
20059004
Bowl
20058389
Gasket
70902026
AutoLock
70903034
Sensor cover
20059014
Front panel
20150316
Display
Keypad
Version
Heraeus
Sorvall
Thermo
Part number
20059701
20059703
20059705
7-5
SPARE PARTS
Drive
70902026
AutoLock
70903034
Sensor cover
20059030
Motor
70902001 incl.
3x AV-mount
6x sand paper disc
7-6
Preventive maintenance
checklist
Account name:
Account address:
Instrument model:
Serial number:
Report number:
Date:
Megafuge 8
SL8 / ST8
Maintenance without dismantling the centrifuge
Acceptance criteria
Pass
Electrical installation
Supply voltage and main power fusing meets specifications (data plate)
Instrument plug and wall socket in good condition
Power cord insulation not damaged
Instrument socket not damaged
Comments:
Location and mechanical installation
Base resonance-free and stable
Safety clearance around instrument of 30 cm
Centrifuge level
Comments:
Lid lock mechanism and safety circuit
Centrifuge lid opens and closes easily and smoothly
Rubber gasket not damaged
Centrifuge lid is properly supported by gas lid stay
Centrifuge lid does not open while rotor is spinning
Comments:
Cleanliness of chamber and motor cover
No particles inside spin chamber
No corrosion
Motor cover clean and not damaged
Comments:
Rotors and buckets
No corrosion
No scratches
No vertical scratches (carbon fiber rotors)
Seals in good condition and sealing surfaces not scratched
Comments:
AutoLock and motor shaft
No scratches
Not bent
No dents
Comments:
1 of 2
Fail
Report Number:
Date:
Maintenance after dismantling the centrifuge casing
Acceptance criteria
Pass
Fail
Motor support elements
Anti vibration mounts not older than 3 years
Anti vibration mounts in good condition
Comments:
Imbalance detection
Cuts off with “cut off weight”
Does not cut off with “run through weight”
Comments:
Braking circuit
Brake resistor cold in stand by
Brake resistor hot during deceleration
Brake effect smooth and noiseless
Comments:
Lead and screwing connections
All connections on mains inlet socket and power switch tight
All connections on main board tight
All other connections tight
Comments:
Protection earth core and grounding connections
Grounding resistance < 200 mΩ
Insulation resistance > 10 MΩ
Accessible current < 500 µA
Comments:
Comments:
Instrument passed:
YES □
NO □
Certified by:__________________________ Reviewed by:__________________________ Expiration date ______
Signature
Use ONLY blue permanent ink when filling out.
Date
Customer Signature
Leave NO blank spaces.
Revised 10/07/12
2 of 2
Date
Oct, 2010
Calibration certification
Account name:
Account address:
Instrument model:
serial Number:
Report number:
Date:
Megafuge 8
ST8 / SL8
SPEED
Standard test
Rotor used:
Set speed
(rpm)
Tolerance
(whichever is greater)
1000
+/- 10 rpm, 1%
Rotor max
+/- 10 rpm, 1%
Displayed
Speed (rpm)
Custom test
Measured
speed (rpm)
Meets
spec. (y/n)
Notes
Passed
(initials)
90°
180°
270°
Meets
spec. (y/n)
Notes
Passed
(initials)
Rotor used:
+/- 10 rpm, 1%
+/- 10 rpm, 1%
IMBALANCE
Rotor used:
0°
Rotor cut off weight:
Cuts off (y/n):
Passed (Initials):
Rotor run through weight:
Runs through (y/n):
Passed (Initials):
TIME
Standard test
Rotor Used:
Timer Set
(min.)
Tolerance
(sec.)
10
+/- 10
Custom test
Measured
time (m/s)
Rotor Used:
+/- 10
+/- 10
SAFETY TEST
Limit
Grounding resistance
< 200 mΩ
Insulation resistance
> 10 MΩ
Accessible current
< 500 µA
Actual
Passed (initials)
Serial number
Date of next calibration
TEST EQUIPMENT
Type
Model
Stopwatch
Temperature meter
Optical tachometer
Safety tester
Certified by:__________________________ Reviewed by:__________________________ Expiration date ______
Signature
Use ONLY blue permanent ink when filling out.
Date
Customer Signature
Leave NO blank spaces.
Date
.
Revised 10/07/12
X:\DEOHA\Public\TS\SM\Ueberarb\MISTT\Manual Dateien\B1-MISTT calibration form.docx
June, 1999
TECHNICAL BULLETINS
C-1
TECHNICAL BULLETINS
TSB
Title
Page