service manual - sorvall - heraeus - thermo scientific - megafuge 8 sl8 st8 - v180113
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original version of this manual is valid. Thermo Scientific cannot guarantee the accuracy or completeness of subsequent copies
Service ManualHeraeus Megafuge 8Sorvall ST8
Thermo Scientific SL8
PN: 12007200-01
The original version of this manual is valid. ThermoScientific cannot guarantee the accuracy or
completeness of subsequent copies
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iTABLE OF CONTENTS
TABLE OF CONTENTS
Introduction iii
Revision Control iv
Chapter 1 Technical Data 1-1
Chapter 2 Service 2-1
Servicing Schedule 2-2
Trouble Shooting 2-4
Error Codes 2-6
Test Points 2-13System Menu and Service Menu 2-15
Imbalance Behavior 2-18
Cleaning of Instrument Parts 2-18
Electrical Safety Check 2-19
Chapter 3 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
Chapter 4 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 4-7Imbalance RPM 4-8
Key Control 4-9
Chapter 5 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
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INTRODUCTION ii
Chapter 6 Calibration (Reference Measurement) 6-1
Introduction 6-2
Requirements 6-2
Calibration (Reference Measurement) Procedure 6-3
Documentation 6-5
Chapter 7 Spare Parts 7-1
Preventive Maintenance Checklist A-1
Calibration Certification Form B-1
Technical Bulletins C-1
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INTRODUCTION iii
INTRODUCTION
CAREFULLY READ THIS MANUAL BEFORE SERVICING YOURINSTRUMENT.
INFORMATION CONTAINED IN THIS DOCUMENT IS THE PROPERTY OFTHERMO FISHER SCIENTIFIC;IT MAY NOT BE DUPLICATED OR DISTRIBUTED WITHOUT THEOWNER’S AUTHORIZATION!
PURPOSE
This manual contains maintenance instructions intended for use by a qualifiedmaintenance or service technician.
It is organized to provide information on the theory of operation to assist introubleshooting for personnel of Thermo Fisher Scientific and authorizedservice organizations. Moreover, it outlines parts replacement and calibrationprocedures for putting the centrifuges back into service.
Should a specific maintenance problem arise which is not covered in thismanual, please contact our after sales or product support department.
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REVISION CONTROL iv
REVISION CONTROL
Revision Change Date
01 Initial release 18.01.2013
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Heraeus Megafuge 8Sorvall ST8Thermo Scientific SL8
Environmental conditions
Permissible ambient temperat
Timer rangeMax. speedMin. speedMax. kin. energyMax. sound level at top speed
Vol
HePoRaHeiHei
WiDeWerot
Rotor /bucket
Rotor nam
75005701 TX-150 Rot75005702 TX-150 Round
75005703 TX-150 Oval b75005704 TX-100S75005705 TX-10075005706 M-10 Roto75005723 M-10 Unsealed75005721 M-10 Sealed B75005600 MT-12 Rot75005709 HIGHConic III75003623 CLINIConic R75005719 MicroClick 30x275005715 MicroClick 24x275003473 Hematocrit R75005643 PCR Strip Roto
T
- Indoor use only- Max. height above sea level 20
- Max. relative humidity 80% at 3
- Linear decrease until 50% relatire +2°C to +35°C
10sec – 99h 59min and hold mode d16000 rpm a300 rpm a< 8.2 kNm< 61 dB (A)
t Version 120V 230V
t output BTU/h 1060er consumption 310 W
ed current 5.0 A 2.0 Aght (lid closed) 31 cm / 12.2 inght (lid open) 67 cm / 26.8 in
th 37 cm / 14.6 inth 48 cm / 18.9 in
ight (withoutor)
35 kg / 77 lbs
eAllowableimbalance
[g]max. speed ma
or 10 4500 3ucket 10 4500 3
cket 10 4500 310 4500 310 4500 3
r 10 4400 2ucket 10 4400 2
ucket 10 4400 2r 4 13000 1otor 10 8700 1
otor 10 4400 3Rotor 4 14000 21Rotor 4 16000 2tor 1 capillary 13300 1
r 8x8 4 15000 1
1-1CHNICAL DATA
0m°Ce humidity at 40°C
eviation: +/- 10 sec.ccuracy: +/- 10rpm
ccuracy: +/- 10rpm
x. x g max radius
260 14.4260 14.4
260 14.4215 14.2260 14.4576 11.9576 11.9381 11.0438 8.7155 12.0
030 14.0694 9.9327 8.5810 8.5860 7.1
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2-1SERVICE
SERVICE
Servicing Schedule 2-2
Maintenance Routine without dismantling the centrifuge 2-2
Maintenance Routine after dismantling the centrifuge casing 2-3
Trouble Shooting 2-4
Malfunctions without Error Messages 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
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2-2SERVICE
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 mainsfusing (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 stableconditions.
Check for a well ventilated place and sufficient distances to walls or adjacent equipment, withoutexposition 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 lidmust not be unlocked by the microprocessor as long as the speed is more than 60 rpm - if safetycircuit 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 therotor.
Clean the spin chamber with a dry and absorbent cloth (remove all dust and moisture - see alsopage 2-18 for cleaning).
Check the cleanliness of the motor cover and take special care of the slot between the bowl andthe motor cover: penetrating fluids can damage the motor and/or electronics and foreign objectsmay block the air flow.
Condition and sealing of rotors and accessories
Check the condition of rotors and accessory parts (especially all supporting or stressedpartitions): the rotor and/or accessory parts must not be used any longer, if there are visibletraces of mechanical damage or corrosion.
Check the condition of rotor and/or accessory sealing and replace them in case of malfunction.
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2-3SERVICE
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 thedrive 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 inadmissibletemperature 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 mainboard 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 Protectionearth core and grounding connections.
Check the grounding connection for continuity and all grounding plug connectors. (see also page2-19 Electrical Safety Check)
Check insulation resistance and accessible current. (see page 2-19)
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2-4SERVICE
Trouble shooting
Malfunctions without error code
Error Error Cause Possible Error
Source Corrective Procedure
Displayremains off
no mainsvoltage supply
power switch withintegrated thermal
over current cut outCheck supply voltage at X16. If no voltageis present, check power switch, instrument
socket and voltage supply.Replace defective parts
mains fuse or circuitbreaker failed
faulty mains cord or instrument socket
no lowvoltage
supply for display
faulty connectionfrom main board to
display
Check presence of 5V (LED V75), 15V(LED V78) and 24V (LED V79) controlvoltages on main board. If a voltage ismissing (LED off) replace main board.Check the display cable (SSTP patch
cable). Replace the display.
faulty display or main board
Displaybacklight is
lit, butnothing
displayed
or displayshows
cryptically(wrong)
characters
data
connectiondisturbed
faulty connection
from main board todisplay
Check for interferences such as radios,micro wave ovens, etc. Check for good
grounding connection. Check the displaycable (SSTP – shielded cable). If no other
error source can be identified, replace mainboard.
No displaybacklight
LCDpowersafe
mode
Press any button. To switch off the LCDpowersafe mode enter the system menu.
faultybacklight
faulty backlight Replace display.
Displayshows
OOTI N …
CPU programreset may be
caused byEMI
supply voltage drop(>10%)
(Let) improve the power supply. If thevoltage drops often, use a voltage
stabilizer.
bad or missinggrounding
connectioncheck all grounding connections
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2-5SERVICE
Error Error Cause Possible Error
Source Corrective Procedure
Drivemakesnoises,
no goodseparation
result
mechanical
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 greasedsufficiently
Inform users that trunnions must becleaned and greased on a regular basis.
See user manual for more information.
Buckets of swingingbucket rotor notweight identical
Check weight index on buckets.
bad motor bearings Turn motor by hand. If a scratching noise is
audible, replace complete motor.
electrical
missing phase 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
Buttonsinoperative
overlay or overlay
adaptor hasno contact
ribbon cable broken,or no contact
Check correct sitting of ribbon cable inoverlay adaptor. Check ribbon cable
between overlay adaptor and main board.Replace defective overlay, overlay adaptor
or ribbon cable.
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2-6SERVICE
Error-Codes
Should multiple errors occur at the same time, the centrifuge will display up to 3 errors at once, byalternating 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 openedE-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 implausibleE-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
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2-7SERVICE
Error Description
E-074 Latch motor control fault
E-077 System health check error
E-078 Set speed above max speedE-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
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2-8SERVICE
Detailed error description and action plan
Error Possible Error
Source Corrective Procedure
Possiblespare part
E-001 System clock on
main board failed
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.
Main board
E-002 Internal software
problem
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.
Main board
E-005 Internal software
problem
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.
Main board
E-008 ROM failed
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.
Main board
E-010
Wrong NV-RAM,communication
between NV-RAMand main controller
disturbed
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,check NV-RAM and socket.Insert the correct NV-RAM
NV-RAM
E-011check versions of
NV RAM andE-PROM
replace NV RAM with correct one NV-RAM
E-012 NV-RAM failed
The rotor is coasting freely.
Wait for rotor to stop and turn the power switch off. Wait 5seconds before turning it back on. If the error persists,
replace NV-RAM.
NV-RAM
E-014
Compressor doesnot work,
low refrigerant,fan inoperative
Refrigerated units only: The rotor is decelerated withmaximum braking. DO NOT TOUCH ANY INSIDE PARTS
AFTER OPENING THE LID! BURN HAZARD! Performcompressor test (Service Menu), check fan and remove
dust from condensing unit. Replace defective parts.In case of low refrigerant, use leak detector, repair leak
and recharge s ystem.
Compressor FanTEV
Refrigerant
E-015
Temp. sensor,
control circuits
Refrigerated units only: The rotor is decelerated withmaximum braking. Disconnect PT1000 from main board
(X3) and check resistance(R = 1,000Ω @ 0°C or 1,078Ω @ 20°C). Replace faultyPT1000 or faulty main board.
PT1000
E-016 Temp. sensor,
control circuits
Refrigerated units only: The rotor is decelerated withmaximum 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.
PT1000
E-017 Power interruption,
Reset during run
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.Main board
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2-9SERVICE
Error Possible Error
Source Corrective Procedure
Possiblespare part
E-019
Wrong rotor installed,
old version of NV-RAM
The rotor is decelerated with maximum braking.
Install correct rotor.Install latest NV-RAM version.
Rotor
NV-RAM
E-020
Wrong rotor installed,
Rotor codingfaulty,
Interference,NV-RAM faulty
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 CODERING!
Separate motor cables and signal cables, otherwiseinterference is caused.
If the error persists, replace NV-RAM
Rotor NV-RAM
E-021Sensor cover
faulty,Interference
The rotor is coasting freely.Separate motor cables and signal cables, otherwise
interference is caused.
Replace sensor cover.
Sensor cover
E-022Sensor cover
faulty,Interference
The rotor is coasting freely.Separate motor cables and signal cables, otherwise
interference is caused.Replace sensor cover.
Sensor cover
E-023Sensor cover
faulty,Interference
The rotor is coasting freely.Separate motor cables and signal cables, otherwise
interference is caused.Replace sensor cover.
Sensor cover
E-025Latch failed,
Cable interrupted,Main board failed
Check operation of stepper motor when pressing lidbutton. Disconnect stepper motor from main board (X8)
and check resistance (12 = 46Ω, 34 = 46Ω). Ifstepper motor/cable is ok, replace main board.
Lid latch
E-027 Latch or wires
broken
Switch 2 is closed when switch 1 is open = implausible.Check micro switches and wires. Replace latch. If latch is
ok, replace main board.Lid latch
E-029
No rotor installed,Motor/rotor
blocked,Motor faulty,
No speed signal,Motor driver on
main board faulty
The rotor is coasting freely. CHECK FOR NO ROTATIONOF ROTOR THROUGH LID W INDOW 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 andinsulation resistance of motor. If motor is ok, replace main
board
Motor Main board
Sensor cover
E-030Mains voltage too
low,Main board failed
The rotor is coasting freely.Check mains power supply.
Replace Main boardMain board
E-031
Hot motor,no air circulation,faulty over temp.
cut-out.
The rotor is coasting freely.DO NOT TOUCH THE MOTOR, ROTOR AND/OR
ADJACENT PARTS! BURN HAZARD! Wait for motor tocool 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 incase of malfunction.
Motor Fan
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2-10SERVICE
Error Possible Error
Source Corrective Procedure
Possiblespare part
E-033
No ventilation,Pipes blocked,
Faulty over pressure switch
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)
FanTEV
OP switch
E-034Brake resistor
open,main board faulty
The rotor is coasting freely.Disconnect brake resistor from main board (X20) andcheck resistance (120Ω). Replace if faulty, otherwise
replace main board.
Brakeresistor
Main board
E-036
Brake resistor open or short,
Motor windingshort,
Main board faulty
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
Brakeresistor
Main boardMotor
E-038 Internal software
problem
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.
Main board
E-040
Extremeimbalance,
motor bearings,motor phase
missing
The rotor is decelerated with maximum braking.Check for imbalanced load. Check motor for smooth
turning. Disconnect motor from main board (X10) andcheck winding resistance. Replace motor if faulty.
Otherwise replace main board.
Motor Main board
E-041 Imbalance sensor faulty
The rotor is decelerated with maximum braking.Replace sensor cover.
Sensor cover
E-045Power interruption
during run ANDspeed signal error
The rotor is coasting freely.During run a power outage happened. After power
recovery the rotor speed is 0. The rotor is turned at lowspeed and no speed signal is detected.
See “E-29”
Sensor cover
Main board
E-046
Emergency lidopening detected
during run,Faulty micro switch
The rotor is decelerated with maximum braking.CLOSE LID IMMEDIATELY!
NEVER OPEN THE LID WHILE THE ROTOR ISSPINNING. Wait for rotor to stop.
In case of faulty micro switches replace latch.
Lid latch
E-048to
E-052
Internal softwareproblem
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.
Main board
E-053to
E-054
Internal softwareproblem
The rotor is decelerated with maximum braking.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.
Main board
E-060
Compressor control fault,
Temperature probe
fault
Refrigerated units only:The rotor is decelerated with maximum braking.
DO NOT TOUCH THE INSIDE OF CHAMBER ANDROTOR WITH BARE HANDS! FREEZE HAZARD!
Disconnect PT1000 from main board (X3) and check
resistance (R = 1,000Ω @ 0°C or 1,078Ω @ 20°C).Replace if faulty. Otherwise replace main board.
Main boardPT1000
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2-11SERVICE
Error Possible Error
Source Corrective Procedure
Possiblespare part
E-072
Internal software
problem
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.
Main board
E-074Latch motor
broken / blocked,Main board failed
The rotor is decelerated with maximum braking.Wait for rotor to stop and turn the power switch off. Wait 5
seconds before turning it back on. Check the latch byopening and closing the lid. If faulty, replace lid latch.
Otherwise replace main board
Lid latchMain board
E-077 Internal software
problem
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.
Main board
E-078 Motor control fault
The rotor is decelerated with maximum braking.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.
Main board
E-079 n > nrotor max +25The rotor is coasting freely.
The controller is not able to control the rotor speedproperly. Replace main board.
Main board
E-080 Internal software
problem
The rotor is coasting freely.Wait for rotor to stop and turn the power switch off. Wait5 seconds before turning it back on. If the error persists,
replace main board.
Main board
E-081 Internal software
problem
The rotor is coasting freely.Wait for rotor to stop and turn the power switch off. Wait5 seconds before turning it back on. If the error persists,
replace main board.
Main board
E-083
Brake resistor overheated,
No air circulation,Main board failed
The rotor is coasting freely.DO NOT TOUCH THE BRAKE RESISTOR! BURN
HAZARD!Check ventilation slots for cleanliness and check fans for
operation.Disconnect brake resistor from main board (X20) and
check resistance (120Ω). Replace brake resistor if faulty.Otherwise replace main board
Main boardBrake
resistor Fan
E-098 Imbalanced load
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.If the error persists check anti vibration mounts. Replace
mounts if worn or older than 3 years. If the error persistsreplace sensor cover.
AV mountsSensor cover
E-101to
E-104
Measurementshows great
deviations(+/- 5°C) to
expected values.
Refrigerated units only:The rotor is decelerated with maximum braking.
Disconnect PT1000 from main board (X3) and checkresistance
(R = 1,000Ω @ 0°C or 1,078Ω @ 20°C). ReplacePT1000 if faulty. Otherwise replace main board.
Check also for interference.
PT1000Main board
E-105 Internal software
problem
The rotor is decelerated with maximum braking. 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.
Main board
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2-12SERVICE
Error Possible Error
Source Corrective Procedure
Possiblespare part
E-106 Main board failed
The rotor is decelerated with maximum braking. 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.
Main board
E-107 No air circulation,
Fan inoperative
The rotor is coasting freely. Wait for rotor to stop and turnthe power switch off. Wait 30 minutes to allow cooling
down before turning it back on. Clean ventilation slots.Remove dust from main board (unit disconnected from
mains!). Check fan (refrigerated units only). Replace fanif faulty. If the error persists replace main board.
FanMain board
.
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2-13SERVICE
Test Points
Test Point Unit Value Conditions
Mains inputX16
230V / 120V CAUTION! Mains potential!
Mains cable connected, power switch ON
Motor X10
A-B 5.6 Ω A-C 5.6 ΩB-C 5.6 Ω
Ambient at 20°C, plugs disconnected frommain board.
Any phase to ground must have an infiniteresistance.
Brake resistor X20
120 Ω Ambient at 20°C, cables disconnected from
main board
Over temperaturecut-out motor
X11
15 VDC0 VDC
Cables connected, power ON
Lid openLid closed
openshort
Cables disconnected, power OFFLid open
Lid closed
Over temperaturecut-out brake resistor
X9
15 VDC0 VDC
Cables connected, power ONFailureGood
openshort
Cables disconnected, power OFFFailureGood
Lid latch micro switches
X14
Pin 1+40 VDC
2.5 VDC
Cables connected, power ONLid closedLid open
Pin 1+4shortopen
Cables disconnected, power OFFLid closedLid open
Pin 2+3
5 VDC0 VDC
Cables connected, power ONStandby
Stepper motor moves into zero state after lid hasbeen opened
Pin 2+3openshort
Cables disconnected, power OFFStandby
Stepper motor moves into zero state after lid hasbeen opened
Pin 5+60 VDC
2.5 VDC
Cables connected, power ONLid closedLid open
Pin 5+6shortopen
Cables disconnected, power OFFLid closedLid open
Lid latch stepper motor X8
Pin 1-2 46 ΩPin 3-4 46 Ω
Ambient at 20°C, plug disconnected frommain board
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2-14SERVICE
Test Point Unit Value Conditions
DC bus voltageLED V41 DC BUS (red)
lit All cables connected, power switch ON,
lid closed
dimly lit All cables connected, power switch ON,
lid open
15 V control circuitpower supply
LED V79 (red)lit All cables connected, power switch ON
Speed signal
LED V11 RUN (green)
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 speedsabove 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
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2-15SERVICE
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 additionalinformation for service calls.
To enter the system menu 1. Switch off the centrifuge2. Press and hold any button on the overlay3. Switch on the centrifuge
4. When Ent er SYSTEM Menu?
SYSTEM MENUappears, 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, statisticsand tests.
To enter the service menu 1. Switch off the centrifuge2. Press and hold buttons “Program 1” and “Program 2”
3. Switch on the centrifuge
4. When Ent er Ser vi ce Menu?
SERVI CE MENUappears, 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.
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2-16SERVICE
System menu structure
Language: Engl i shSYSTEM MENU
End of r un beep? Yes
SYSTEM MENU
End of r un f l ash? Yes
SYSTEM MENU
Keypad beep? Yes
SYSTEM MENU
Beeper vol ume 3
SYSTEM MENU
Lcd power s af e? YesSYSTEM MENU
Aut o l i d open yes
SYSTEM MENU
Pr ogr ams onl y mode no
SYSTEM MENU
Sof t war e i d: xxxx Vxx
SYSTEM MENU
NVr am i d: xxxx Vxx
SYSTEM MENU
Cycl e count t ot al XXXXXXSYSTEM MENU
Use TIME UP andDOWN to select thedesired language.
Use TIME UP andDOWN to selectYES or NO
Use TIME UP andDOWN to selectYES or NO
Use TIME UP andDOWN to set the volumebetween 1 and 5
Software version
Software revision
NV-RAM version
NV-RAM revision
Total number of runs
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2-17SERVICE
Service menu structure
Cycl e count t ot al XXXXXX Cycl es r ot or XXXX: XXXXX
SERVI CE MENU SERVI CE MENU
Vi ew er r or l i st ? EXXX XXXX XXXXX XXXXX XX
SERVI CE MENU SERVI CE MENU
Uni t hour s XXXXXhXX
SERVI CE MENUVi ew devi ce st at s ? Dr i ve hour s XXXXXhXX
SERVI CE MENU SERVI CE MENULi d l ock cycl es XXXX
SERVI CE MENU
St ar t but t on t es t ?
SERVI CE MENU
St ar t di s pl ay t es t ?
SERVI CE MENU »»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»
Last 4 digitsof rotor code
Error number
Last 4 digitsof rotor code
Speed whenerror occurred
Set speed
Up countingnumber
2. All displayelements are lit
Total counter of lidopen / close cycles
MinutesHours
1. No displayelement is lit
Use TIME UPand DOWN toscroll throughlists
Use TIME UPand DOWN totoggle betweenscreens
Use SPEED UPand DOWN totoggle betweenscreens
Use SPEED UPand DOWN totoggle betweenscreens
Use SPEED UPand DOWN totoggle betweenscreens
Use SPEED UPand DOWN totoggle betweenscreens
Press START to start the test.Then press the buttons as they arerequested in the display. In case of malfunction (no entry is recognizedby the micro controller), the nextbutton will be requested to pressafter 30 seconds.
Number of runs with thistype of rotor
Total number of runs
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2-18SERVICE
Imbalance Behavior
Install a rotor from the table below in unloaded condition (without adapter or other inserts)
Rotor Rotor name Run through
weight (grams)Cut off weight
(grams)
75005701 TX-150 Rotor 10 20
75005702 TX-150 Round Bucket 10 20
75005703 TX-150 Oval Bucket 10 20
75005704 TX-100S 10 20
75005635 TX-100 10 20
75005706 M-10 Rotor 10 30
75005637 MT-12 Rotor 4 12
75005600 HIGHConic Rotor 10 30
75003623 CLINIConic Rotor 10 30
75005719 MicroClick 30x2 Rotor 4 1275005715 MicroClick 24x2 Rotor 4 12
75003473 Hematocrit Rotor 1 capillary 6 capillary
75005643 PCR Strip Rotor 8x8 4 8
Insert rotor dependent cut-off weight in all buckets or Sample holders one after the other. Thecentrifuge must show an “Imbalance” message and stop.
Insert the run through weight in the same manner, the centrifuge must run through 4 times tomaximum 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 componentsClean dusty components carefully with a dry and soft brush and remove loose dust with avacuum cleaner.
Fans (refrigerated units only)Scratch off carefully with a knife or similar tool the crusted dirt from the fans’ blades. Resultinggrooves or marks must be removed subsequently with a fine abrasive cloth. Loose dirt is toremove with an absorbent cloth or vacuum cleaner.
Vent holesRemove dust and dirt from the vent holes of the unit und clean the condenser (refrigeratedunits only) using a brush and vacuum cleaner.
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2-19SERVICE
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 200mCaution!
Insulation resistance checkCheck 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 regulationThe accessible current must not exceed 0.5 mAmps in single fault condition (interruptedprotection earth wire)!
1500±5%
500±1%
L (N)
N (L)
PE
10k±5%
0,022µF±5%
V AC
0,22µF±5%
Steckergehäuse / plug-in casing
Spezifaktionen für Meßgerät- TRMS, DC - 5kHz oder me hr
- Eingangswiderstand > 1M- Toleranz 5% oder besser - Crest Faktor 5 oder besser
Specifaction for the meter - TRMS, DC - 5kHz or more
- Input resistance > 1M
- Tolerance 5% or better - Crest Factor 5 or better
Körperstrom:accessible current:
I [mA] = U [mV] / 500:
U = 250mV I = 0,5mAmax m ax
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3-1FUNCTIONAL 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
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3-2FUNCTIONAL 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
LID LOCK
MAIN BOARD
KEYPAD
DISPLAY
REAR PANEL
OVER TEMPERATUREBRAKE RESISTOR
CHOKE (only 230V)
BRAKE RESISTOR
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3-3FUNCTIONAL DESCRIPTION
Main Board Functions
The Main board is mounted on an aluminum swivel chassis in the front of the centrifuge behind thefront 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) controllingcircuits (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.
1
2
3
5
6
7
8
9
4
NV
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3-4FUNCTIONAL DESCRIPTION
Power Pack
The power pack consists of 1 transformer, 2 rectifiers (single diode) and 2 voltage regulators. Itgenerates the following low voltage levels:
5V VCC: By switched-mode regulator A8499Supplies all processors and its electronic components on main board, keypadand display. The reference potential is GND.
24V: UnregulatedDrives the lid lock stepper motor and the buzzer, supplies the LCD and therelays K1, K2, K3 and K4.The reference potential is GND.
15V: By voltage regulator LM317For 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 thetransmitted motor performance. The intermediate circuit consists of a line voltage selection switch, aheat-sink-cooled bridge rectifier and two reservoir capacitors which are charged whenever thecentrifuge 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 asgenerator). This braking power is transformed into heat by the connected resistor so that theintermediate circuit voltage does not rise to an excessive level. The brake resistor is switched into theintermediate circuit by a fast switching transistor (pulse-width modulation, synchronised by the doublemains 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 andpulse-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 willbe affected). The frequency inverter is protected against over current, over temperature and over-voltage.
Microcontroller (Central Processing Unit) Part
The controller block includes the central processor unit (CPU) LPC1764 programmed with software tocontrol the centrifuge and a data storage (NV-RAM). Current versions and revisions of software anddata can be seen in the system menu.Software is loaded into the LPC1764 via a serial interface on the main board X6 and cannot beupgraded 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 anddeceleration profiles and imbalance behaviour.
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3-5FUNCTIONAL DESCRIPTION
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 themain board indicates the function of the speed and rotor detection. A measurement of the signal isnot possible.
Rotor detection
4 magnets mounted on each rotors bottom are detected by aHall Effect sensor in the motor cover. The magnets are
alternately arranged in polarity on a ring around the rotorscentre. 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 differentpulse lengths and pulse intermissions are generated during onerotor rotation. By this signal the CPU is able to detect up to 65different rotors and the correct direction of rotation, too. After the rotor has been recognized this signal is used for theredundant 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 andthe rotor detection circuit is used to detect the speed, too, after the rotor has been recognized.
Imbalance detection
After the rotor has been recognized, the depending vibrationcurve is loaded from the NV-RAM. If vibration, which is detectedby an accelerometer in the motor cover, exceeds this curve, animbalance alarm is triggered by the CPU.
Lid lock system
The lid is closed by pressing the hook into the latch. Two micro switches monitor the correct positionof the hook and the emergency opening during the run. An alarm is triggered if one of these two microswitches opens, while the rotor is spinning.The latch is unlocked by a bi-directional stepper motor controlled by a stepper motor driver on themain 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.
0
2
4
0 2000 4000 6000
V i b r a t i o n
rpm
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4-1ELECTRICAL 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!
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4-2ELECTRICAL DIAGRAMS
3~ MOTOR
LID LOCK
DISPLAY
REAR PANEL
OVER TEMPERATUREBRAKE RESISTOR
CHOKE (only 230V)
BRAKE RESISTOR
KEYPAD
MAIN BOARD
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Z1M4 mounting
1
D29SN74AHC1G14
2 4
5
3
R169
4K7
V36GBPC1508W
~
~
+ -
R162
100R
C92
1200uF250V
+
K3A
P C J - 1 0 5 D 3 M 1
4
C9710uF6,3V
R176
22k
R165
10K
K2B
PCJ-105D3M
3
2
R1741k
V44ES1D
R175100k
C9610nF50V
D9ALM393
3
21
8
4
-
+
V42BAS16
R154
10k
X9
OT Brake Resistor
12
R14633k
C871uF X2275 VAC
R171
4k7
X17Lumberg K37
123
C91
100nF
500V
R157
75K
C93
47µF
25V
+
R155470K
D28LTV-357T
V38
BC817-25
R172
22k
Z3
M4 mounting
1
R145
75K
R2460R
V47BZX84C5V1
R153150K
K5B40.61.7.024.0000
4
5
DC+DC-
K1A62.22.9.024.0300
A
B
DC+DC-
R27247R
R270
47R
K2A
P C J - 1 0 5 D 3 M 1
4
DC+
DC-
K1B
62.22.9.024.0300
9
4
6
7
SW2Netz 2pol
1
2
3
4
5
6
R149
10kC901uF450V
+
TP16
R163
V275LA10P
U
R16410k
V48BC817-25
K3B
PCJ-105D3M
3
2
R292
10K
R14733k
TP17
X18Lumberg K15
12
V46
BC817-25
R161
4k7
R15133k
L152x7.3mH9.3A
1
3 4
2
R170
2K2
V51BZX84C5V1
R160
75K
V39
BAS16
V49BAS16
R15833k
C942nF2 - Y2250VAC
V35
US1JC862nF2 - Y2N.M.
R150470K
V41LED red
R144
V275LA40A
U
R177
22k
R14320R
V40TL431A
C882nF2 - Y2N.M.
V43
BC817-25
R152150K
X19Lumberg K09
12
V37
BAS16
R148
75K
K5A
40.61.7.024.0000
3
7 1 8
6
2
C95100nF50V
D30LTV-357T
C152nF2 - Y2250VAC
Z6
M4 mounting
1
TP19
K4B
4 0 . 6
1 . 7 . 0
2 4 . 0
0 0 0
4
5
DC+DC-
R178
1M
V45BAS16
V50
BC817-25
K4A
40.61.7.024.0000
3
7
1
8
6
2
R159
12k
R15633k
R271
47R
R173
22k
K6BPCJ-105D3M
3
2
TP18
C891200uF
250V
+
X16
Lumberg K46
12
Z4M4 mounting
1
D9BLM393
5
67
8
4
-
+
R166
4k7
C14
220nF250Vac
N26114356
N 2 6 1 1 4 3 2 9
N26119048
Z1
Z1
GNDGND
VCC
GND
Masse
Masse
Masse
VCC
GND
+24V
GND
+24V
GND
GND
GND
VR
VR
+24V
GND
Conductor status
REL_ON_Buff
/overpressure
U+
U-
NK1
NK2
+24V
GND
link discharge
VCC
compressor
fan1
fan1 high speed
high to C90 > 200V
overpressure switch
compressor
Mains input -
Steady state condition
t o P r o t e c t i o n C i r c u i t - p a g e 4 - 6
N
to supply 2 section
page 4-4
SELVZK
to controller sectionpage 4-7
Max Power = 500W
Imax@230Vac=3Arms(max)
Imax@120Vac=6Arms(max)
condensor fan
Mains Input
DC+
DC-
ELECTRICAL DIAGRAMS 4-3
Power Supply 1
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C129
680u35V
+
TP11
C110100nF50V
R2211K2
R24110K5
R2285K1
V65
SS34
C12247uF35V
+
L17
22u@2.13A
R25056R (N.M.)
C137100uF400V
+
TP14
C13022uF50V
+
V61US1J
V76
1N5362B5W
R227
2M0,25W
V79
LED Green
L18
22u@2.13A
R2314K7
R247
0R
R222
249
R2294R7
C12710nF50V
V58
P 6
S M B 2 0 0 A
D39
TOP255YN
C O N T R O L
3
SOURCE4 DRAIN
7
V - M o n i t o r
1
I - E x t e r n a l
2
F r e q u e n c y
5
V63BZX84C30
Z2
M4 mounting
1
R249(N.M.)
R217PTC 6R C840
R23436K5
V60
ES3D
R2361K5
C152
(N.M.)
R2374K75
L1622u@2.13A
TP12
R2191K2
C131
100nF50V
R2181K2
V64
ES1D R244
0R
C150
470nF(N.M.)
C132
100uF50V
+
R2232K87
C124100nF50V
C134100nF50V
C120
100nF50V
R230
33R
R2393K16
C119
100nF50V
C128470pF200V
R2201K2
C125
330µF
35V
+
C121
100uF50V
+
V62
ES3D
V78LED red
R2251K2
R300
3K9
R2406R8
R301
5K6
TP15
C133
33nF
C140100nF
R2241K2
R233475R
C1233n3250VacY1-Type
TP13
R235
10K
D40LTV-357T
V75LED Green
R232
10K
R245
0R
C136100nF500V
D38 A8499
Boot1
ENB2
TSET3
GND4
FB 5
LX 7
Vin 8
VBIAS 6
P A D
9
C13847uF35V
+
D37
LM317
VI3
A D J
1
VO 2
R23830K
V59
N . M .
R2991K
MV2
N . M .
R226
2M0,25W
C141
100nF
R242
0R
C126
68pF500V
R243
0R
T1TRAF_B66208W
3
4
2
9
10
1
5
6
7
V66TL431A
V57GBU404
~
~
+-
C135
470uF
10V
+
V771N5362B
5W
N15468022
GND
VR
GND
GND
NK1
GND
NK2
+24V
VCC
U-
+15Vprim
ZK
N
SELV
Pmax(tot) = 18W
Iout = 0.12A
Iout = 0.5A
Iout = 0.5A
Iout = 0.05A
ELECTRICAL DIAGRAMS 4-4
Power Supply 2
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R66
6K8
R86470R
D45PS21964-AT
VP18
VP6
VN11
WP7
UN10
VNC16
WN12
FO14
C I N
1 5
VNC9
VN113
P 24
U 23
V 22
W 21
N 20
UP5
VUFB2
VVFB3
VWFB4
R56330R
R69
6K8
R5510R
C58
100nF
M54snap-rivet
D22
ACPL-P480
1
3 4
5
6
2
R87
150K
D23
ACPL-P480
1
3 4
5
6
2
C53
100nF
X10B-1
R73330R
C39100nF
R880R0332W
R67
6K8
C43100nF
M55snap-rivet
R79330R
R75
330R
R5810R
R59330R
V8BC807-25
C591nF50VCER
R65
6K8
R76
330R
R85
4K7
D21
ACPL-P480
1
3 4
5
6
2
C51
100nF
R64330R
C56100pF
R821M
X11
OT Motor Switch12
R70
6K8
R61
4K7
L51K 100MHz
8 12345
67
R80
4K7
R71
4K7D41
74HCT365
I12
I24
I36
I410
I512
I614
DA1
DB15
O1 3
O2 5
O3 7
O4 9
O5 11
O6 13
V
c c
1 6
G N D
8
D15
ACPL-P480
1
3 4
5
6
2
C42100nF50V
R52
4K7
R841M
X10A-1
D16
MURS160T3
R57
4K7
C47100nF
R50330R
R60
330R
X10D-1
R68
6K8
C57100pF
DZ21SMA5934BT324V
C50100pF
C44100nF
C3610uF
35V
+
X10C-1
R5310R
C33100nF50V
R77
330R
D20
MURS160T3
Z5M4 mounting
1
C3510uF
35V
+
R62
330R
R74
4K7
DZ3
1SMA5934BT3
24V
C48100pF
C55
100pF
R811M
C38100nF
C32
100uF50V
+
R63
330R
R83
10K
C54
100nF
C4510uF
35V
+
C40
0.22µF
630Vdcpolyprop.
C49100pF
D19
ACPL-P480
1
3 4
5
6
2
R89
4K7
D25 ACPL-M50L
D24
ACPL-P480
1
3 4
5
6
2
C34100nF
R72
4K7
D18
MURS160T3
C46100nF
DZ4
1SMA5934BT3
24V
DZ11SMA5934BT3
24V
GND
GND
GND
GND
GND
GND
GND
GND
VCC
GND
+15V
+15V
GND
+15V-W
VCC
U+
+15V
motor temperature sensor
+15Vprim
/Enable Gate
PWM-UP
PWM-VPPWM-WP
PWM-VNPWM-WN
PWM-UN
U-
/inverter fault
(contact to frame (earth))
accessible !
X10C =black
X10B =brown
X10A = blue
SELV ZK
X10D =
motor case
ELECTRICAL DIAGRAMS 4-5
Frequency Inverter
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8/20/2019 Service Manual - Sorvall - Heraeus - Thermo Scientific - Megafuge 8 SL8 ST8 - V180113
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D33LTV-357T
D7ALM393
3
21
8
4
-
+
R1794R7
R1881M
R19410K
C1011uF10V
C105
100nF
50V
C9910nF50V
R201750k
V56
BAT54
V54TL431AR195
10K
R205
2M2
R2024K7
R189470K
TP24
R180470K
C10422pF50V
R20610K
D49SN74AHC1G08
A1
B2
G N D
3
out 4 V
c c
5
D7BLM393
5
67
8
4
-
+
R1811K
R1986K8
R182470K
X20Brake Resistor
1
2
R1831K
C10010uF
35V
+ R192
680R
D6BMC33072ADG
5
67
+
-
D34LTV-357T
C1031uF10V
TP25
R1854K7
D6AMC33072ADG
3
21
8
4
+
-
R200
10K
R190220R
R212
10K
C9810nF50V D32
LTV-357T
R20918k
R184470K
R1975K6R196
68KC10210uF6,3V
C107100nF50V
V55TL431A
C148100nF50V
C106100nF50V
V53SPP20N60C3
V52
US1J
R207750k
R2044K7
GNDGND
GND
GND
VCC
GND
GND
VCC
GND
motor temperature sensor
+15V
/overvoltage
VCC
U-
U+
overtemperature motor
+15Vprim
link discharge
power low
U+
forward breakover voltage 378V - 392V
ZK
420V (Typ)
up 210V down 205V
SELV
ELECTRICAL DIAGRAMS 4-6
Protection Circuit
-
8/20/2019 Service Manual - Sorvall - Heraeus - Thermo Scientific - Megafuge 8 SL8 ST8 - V180113
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R8
3K3
R54K7
R364K7
C1711uF50V
+
C1100nF
50V
R1610K
L2
1K@100MHz
C26100nF
50V
R3134K7
TP29
R18
1R
R265100R
D2C74HCT14
5 6
1 4
7
V67 AO3414
C17210nF50V
D11
LPC1764FBD100
V B A T
1 9
V S S 1
3 1
P3.2626
XTAL2 23
V D D 3 . 3_
1
2 8
RTCX218
RTCX116
V R E F N
1 5
P1.31 20
XTAL1 22
P1.24 38
V S S 2
4 1
V R E F P
1 2
V S S A
1 1
V D D A
1 0
P2.11 52
P1.27 43
V D D 3 . 3_
r e g_
1
4 2
P2.10 53
V D D 3 . 3_
2
5 4
V S S 3
5 5
V D D 3 . 3_
3
7 1
V S S 4
7 2
P2.2 73
V S S 5
8 3
V D D 3 . 3_
r e g_
2
8 4
P4.2985
V D D 3 . 3_
4
9 6
V S S 6
9 7
P2.12 51
P2.13 50
P1.20 34
P0.257
P0.266
P1.30 21
P1.0 95
P1.1 94
P1.4 93
P1.8 92
P1.9 91
P1.10 90
P1.14 89
P1.15 88
P1.16 87
P1.17 86
P1.18 32
P1.21 35
P1.23 37
P3.2527
P4.2882
N.C.13
P1.26 40
P1.28 44
P1.29 45
P0.2157
P0.2256
P0.17
61
P0.1959
P0.1663
P0.1860
P0.2058
P0.2725
P0.2929
P0.2824
P0.3030
P0.1048
P0.580
P0.778
P0.481
P0.1562
P0.877
P0.0_SDA146
P0.298
P0.679
P0.1149
P0.1_SCL147
P0.399
P0.976
P1.19
33
P1.22 36
P1.25 39
JTAG_TCK5
JTAG_TMS3
JTAG_TDO1
JTAG_TDI2
JTAG_RTCK100
\JTAG_TRST4
\RSTOUT 14
P2.1 74
P2.0 75
\RESET 17
P0.239
P0.248
P2.6 67P2.5 68P2.4 69
P2.9 64
P2.3 70
P2.8 65P2.7 66
@40MHz
R1510K
C24100nF50V
R25910K
X7LCD Interface
11
22
33
44
55
66
77
88
s h i e l d 0
9 A
s h i e l d 1
9 B
R24100K
V5BC807-25
L31K 100MHz
81234 5
67
C5100nF50V
C23100nF50V
D47D74HCT14
9 8
1 4
7
C101nF50V
D1A74HC14
1 2
1 4
7
R312
4K7
D48F74HCT14
13 12
1 4
7
R3214K7
R26833R
SW1N.M.
C12100nF
50V
R25810K
D42SN74AHC1G08
A1
B2
G N D
3
out 4 V
c c
5
R3510K
C19
10nF
D48B74HCT14
3 4
1 4
7
TP27
R263
10K
R44
22K
D48E74HCT14
11 10
1 4
7
R32222K
CX14x470pF GND
R2691K
D2A74HCT14
1 2
1 4
7
D47C74HCT14
5 6
1 4
7
JP3JUMPER
12
C25100nF50V
D2F74HCT14
13 12
1 4
7
X6Serial Interface
13579
2468
10
+++++++++
+
C8100nF50V
R19
10K
V68BC817-25
R46 100R
V69BC817-25
R42
33K
C2210uF6,3V
C27100nF
50V
V6
BC807-25
D12
E01
E12
E23
VSS4
SDA 5SCL 6
/WC 7
VCC 8
H2AIR Socket
R264100R
X4
13579
2468
1011121314151617181920
+++++
+++++++
++
+ +++
++
R47 100R
R3
4K7
D10LP3985 3.3V
Vin1
Vout 5
G N D
2
Ven3
Byp 4
R37
47K
R3154K7
D4SN74AHCT1G00D
1
24
5
3
R43
33K
X21
Debug Interface
11
22 33 44
C11100nF
50V
C144100nF50V
C16100nF
50V
C29100nF50V
R44K7
JP1JUMPER
12
C7100nF50V
D3E74HC14
11 10
1 4
7
D1B74HC14
3 4
1 4
7
D47F74HCT14
13 12
1 4
7
J112.0 MHz
D12A8-pin Socket
V9MCP9701A
V D D
1
out2
G N D
3R2533K3
C147100nF50V
C21100nF50V
C28100nF
50V
V70
BAT54
V71
BAT54
X32,5mm
2 21 1
C13100nF
50V
C149100nF50V
V7
BC817-25
C6100nF50V
D47E74HCT14
11 10
1 4
7
R63K3
D48C74HCT14
5 6
1 4
7
R2520R
C1722pF50V
D2B74HCT14
3 4
1 4
7
D1E74HC14
1110
1 4
7
R3144K7
R10
1R
D1C74HC14
56
1 4
7
R2847R
R2710K
D1F74HC14
13 12
1 4
7
D13MCP1319MT-29
Vcc5
RESET 1
G N D
2
RESET 3
MR4
D48D74HCT14
9 8
1 4
7
C143
100nF
50V
C1822pF50V
C410nF50V
R14
1K0,1%
C2100nF50V
D14ST3232C
V+ 2
C1+ 1
C1- 3
C2+4
C2-5
V-6
Dout2 7
Rin2 8Rout29
Din210
Din111
Rout112 Rin1 13Dout1 14
1 5
V c c
1 6
R2610K
C3
10uF
10V
C91nF50V
R23
4K7
D1D74HC14
9 8
1 4
7
D48A74HCT14
1 2
1 4
7
R2510K
L6
1K@100MHz
C3110uF6,3V
R45 100R
H2
940nmTSAL7200
R73K3
+LED
RTCKTDO/SWOTDITMS/SWDIOTRST_NTCK/SWDCLK
TRST_NTDI
TMS/SWDIO
RTCKTDO/SWO
TCK/SWDCLK
VSSA
VDDA
/RST
/RST
VSSA
PT1000_ON
/RST
compressor_CMD
compressor_CMD
REL_ON
Display On-Off
Display On-Off
Fault
Fault
/fan1
/fan1
Reset 5V
_MR
_MR
TXD0RXD0
TXD0RXD0
VDDA
PT1000_ON
RXDTXD
SCLK
MOSI/CS1
SCLK
MOSI
/CS1
/fan1 high speed
/fan1 high speed
REL_ON
FAN
+3.3VVCC
GND
GND
GND
GND
GNDGND
VCC
GND
GND
+24V
GND GND
GND
VCC
GND GNDGND
GND
+3.3V
GND
+3.3V
GND
GND
GND GND
GND
+3.3V
GND
+3.3V
+3.3V
GND
VCC
GND
GND
GND
+3.3V
GND
GND
GND GND
GND
+3.3V
GNDGND
+3.3V
GND
VCC
+3.3V
GND
VCC
GND
VCC
GND
GND
VCC
GND
VCC
GND
+3.3V
+3.3V
VCC
/overpressure
fan1
compressor
GND
rpm
+24V
Rotordetection
P2.5P2.6P2.7P2.8
/overvoltage
/Inverter fault
Reset 5V
overtemperature motor
power low
+3.3V
Conductor status
PWM-WPPWM-WN
PWM-VP
PWM-UP
PWM-UN
PWM-VN
imbalance
/Steps
lid lock closed
Stepper Motor Reset
/Enable Gate
P0.9P0.8P0.7
P0.20P0.21
REL_ON_Buff
fan1 high speed
/EN
Fault-SM
/DIR
/LID CURR
/REL_SM
lid closed PWM-FAN
PWM-Buzzer
/Curr-reduc
Pinning RJ45 Buchse: Pin1 LED1+24V Pin2 +5V
Pin3 SCLK
Pin4 GND Pin5 MTSR Pin6 GND Pin7 CS1
Pin8 GND Shield GND
M24C128WBN6
SELV
NM
ELECTRICAL DIAGRAMS 4-7
Controller
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8/20/2019 Service Manual - Sorvall - Heraeus - Thermo Scientific - Megafuge 8 SL8 ST8 - V180113
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V80BC807-25
C114100nF
L23300R@100MHz
C781nF50V
R92220K
V81BC817-25
D43A74HCT14
1 2
1 4
7
R304
100k
V12BC817-25
Lid Switch12
R293
4K7
V1
BAT46W
R309
4K7
D43B74HCT14
3 4
1 4
7
C111
10nF50V
SH1
C661nF50V
R24833K
R305
100k
V10BAS16
13
R951K
X8
JST stehend
11
22
33
44
V13
BC817-25
R310
4K7
C71100nF
50V
R117
4K7
D2E74HCT14
11 10
1 4
7
R2914K7
R306
100k
C161220nF
R1021K
D43E74HCT14
11 10
1 4
7
D26SN74AHCT1G00D
1
24
5
3
C60100nF50V
R282
1R1W
R31110k
R118
4K7
C75
5n6F50V
R280
100K
R1011K2
R295
0R51W
Lid Lock Switch12
R281
1R1W
D2D74HCT14
9 8
1 4
7
D5A74HC4538
RC2
CX1
+T4
-T5
R
3
Q 6
Q 7
V D D
1 6
V s s
8
C791nF50V
L111K 100MHz
81234 5
67
R285
33K2
D43C74HCT14
5 6
1 4
7
V18BAS16
V22BAS16
C1731nF50V
R298
270K
L41K 100MHz
8 12345
67 C112
820pF
R30215K
R119
4K7
R26610k
R106
1K
V21
FDN304P
C76
100nF50V
R2831K8
R107
100R
R2841K8
R11
4K7
R12110K
K6A P C J - 1 0 5 D 3 M
DC+DC-
R289100K
D43F74HCT14
13 12
1 4
7
TP67
R99
4K7
R93
1M
D46
SN74AHCT1G08
A1
B2
G N D
3
out 4 V
c c
5
L121K 100MHz
8 1
2345
67
V20
BC817-25
R120
4K7
R286
33K2
R96100k
C167220nF
R2964K7
L71K 100MHz
81234 5
67
X14JST stehend
123456
R29727K
R108
15K
C72100nF50V
C160 220nF
C6810uF6,3V
L20300R@100MHz
C63100nF
R294
4k7
R287
100K
D8SN74AHCT1G08
A1
B2
G N D
3
out 4 V
c c
5
R91NM
R279100K
C67100nF50V
C15910nF50V
C164820pF
D43D74HCT14
98
1 4
7
C170
100nF
50V
R1164K7
K7A
P C J - 1 0 5 D 3 M
1
4
DC+
DC-
C741nF
50V
L21300R@100MHz
R111
4K7
R1031K8
L8100mH
C77
100uF50V
+
C146
100nF
R30810k
V11LED Green
R9033K
C166
220nF
D35INA193
OUT1
GND2
Vin+3 Vin- 4
V+ 5
X13JST stehend
1 1
2 2
3 3
D52BLM393
5
67
8
4
-
+
R110
15K
D52ALM393
3
21
8
4
-
+
C731nF50V
C168100nF
Stepper motor reset12
C169
100nF
50V
R26133K
C113820pF
L10100mH
R30710k
R104
1K8
V15
BAT46W
R105
100k
K7BPCJ-105D3M
3
2
R9810K
C651uF10V
D31SN74AHCT1G08
A1
B2
G N D
3
out 4 V
c c
5
TP68
R2514K7
R97
1K
D51
L6228D
OUT2A 21
G N D
1 8
G N D
1 9
OUT1B 8
OUT2B 16
V S B
1 7
V S A
2 0
V C P
2 2
G N D
7
V B O O T
1 5
G N D
6
CLOCK1
CW/CCW2
CONTROL13
H/F12
EN14
RESET23
V R E F A
2 4
V R E F B
1 1
R C A
4
R C B
9
S E N S E A
3
S E N S E B
1 0
OUT1A 5
R303
100k
L22300R@100MHz
R941K R100
3K6
C6110nF
50V
R109
4K7
C165
820pF
D5B74HC4538
RC14
CX15
+T12
-T11
R
1 3
Q 10
Q 9
X12JST stehend
1 1
2 2
3 3
4 4
C641uF10V
N5468836
N5468902
N5469480
REL_SM
/Reset 5V
/LID-CURR
REL_SM
/Reset 5V
/LID-CURR
GNDGND
VCC
GNDGND
GND
GND
GNDGND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VCC
GND
VCC
GND
GND GND GND
GND_1GND
VCC
VCC
VCC
GND
GND
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
GND
GND
GNDGND
GNDGND
GND_1
VCC
GND
GND
VCC
GND
GND
VCC
VCC
rpm
VCC
GND
Reset 5V
lid lock closed
Rotordetection
lid closed
+24V
/DIR
/Steps
/EN
Fault-SM
/LID CURR
/REL_SM
Stepper Motor Reset
imbalance
/Curr-reduc
SPEED 2
SPEED +
UNBALANCE
SELV
F = 150-800Hz 0V
3.3V
One step ON
each falling edge
Low = No Fault
Low = drive enabled
Low = Motor current ON
Low = Relay closed
ELECTRICAL DIAGRAMS 4-8
Imbalance RPM
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8/20/2019 Service Manual - Sorvall - Heraeus - Thermo Scientific - Megafuge 8 SL8 ST8 - V180113
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V3
STD12NF06L
R134
100kR1351K
V29 BAT54
13
V2BC817-25
V34BC807-25
X15connecting plug cod
1 3 5 7 9
2 4 6 8 1 0
1 1
1 2
1 3
1 4
+ + + + +
+ + + + + + +
+ +
D3F74HC14
13 12
1 4
7
R128
4K7
R142330R
R139330R
R1210K
V24 BAT54
13
C851nF50V
C81100nF50V
R3204K7
R126
27RV31BC807-25
R122 1K
C52
1uF50V
+
C145
100uF50V
+
V28 BAT54
13
R2110K
R3164K7
R124 1K
L13 1K 100MHz
81234 5
67
R1381K
R3194K7
C831nF50V
R127
4K7
R20
10K
R29
47K
V33BC807-25
R1304K7
D3D74HC14
98
1 4
7
L1
200R 300MHz
4 123
R1411K
C821nF50V
V27 BAT54
13
V25 BAT54
13
C70100nF
50V
V16
BAS16
C41100nF
50V
R140
100k
R133330R
D47B74HCT14
3 4
1 4
7
R13
75K
D3B74HC14
34
1 4
7
D3C74HC14
56
1 4
7
H1SMA-17
+
-
R17
1K
C841nF50V
R131
100k
D3A74HC14
12
1 4
7
R136330R
R221K
R317
4K7
R301K
V30 BAT54
13
R125
4K7
V23 BAT54
13
R1231K
V32BC807-25 R1
100K
L14 1K 100MHz
81234 5
67
C151
100nF50V
D2774HCT138
A1
B2
C3
G16
G2A4
G2B5
Y0 15
Y1 14
Y2 13
Y3 12
Y4 11
Y5 10
Y6 9
Y7 7
R3184K7
R129
27R
V26 BAT54
13
D17BMC33072ADG
5
67
+
-
C37100nF
50V
X12mm
22 11
D47A
74HCT14
1 2
1 4
7
D17AMC33072ADG
3
21
8
4
+
-
C80100nF50V
V4
MMSZ5242B12V-0.5W
R1321K
R137
100k
LEDblock2
LEDblock1
GND
VCC
GNDGND
GND
VCC
GND
VCC
GND
VCC
GND
VCC
VCC
GND
VCC
GND
GND
VCC
GND
+24V
GND
GND
GND
+24V
+3.3V
+3.3V
+3.3V
GND
VCC
P0.7P0.8P0.9
P0.20
P0.21
P2.5
P2.6
P2.7
P2.8
Reset 5V
PWM-FAN
PWM-Buzzer
FAN
(Fpwm = 4KHz - PWM
100% high = FAN OFF)
0V
5V
(Fpwm = 4KHz -PWM 100% low = Buzzer OFF)
0V
3.3V
ELECTRICAL DIAGRAMS 4-9
Key Control
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5-1DISASSEMBLY 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 5-4NV-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.
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5-2DISASSEMBLY OF INSTRUMENT PARTS
Disassembly of mechanical parts
Front Panel
Open the lid, switch off the unit and pull out the mains plugRemove the 2 screws on top of the front panelPull 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 lidRemove 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 plugRemove gas lid stay from top joint blockRemove the 4 screws attaching the lid hinges to the main
frame.When reassembling the lid take care that the lid bolt fits thecasing hole centric.
The lid hook must be adjusted to a visible length of 42mm.
42mm
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5-3DISASSEMBLY OF INSTRUMENT PARTS
Gasket
Remove the 3 screws hidden by the gasket that are attachingthe inner bowl and the gasket to the outer casing.
Slightly lift the bowl together with the gasket and take thegasket 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 attachingthe 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.
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5-4DISASSEMBLY OF INSTRUMENT PARTS
Replacement of electrical components
NV-RAM on the main board
Before replacing the NV-RAM enter the system menu and notethe version and revision number.Remove the front panel.Remove the 4 screws at the swivel cassis and flip down themain board. ATTENTION - Discharge your body before handlingCMOS components!Use a chip removal tool or a small screwdriver to pull the NV-RAM out of its socket. After reassembly check the version and revision number of thenew NV-RAM in the system menu.
Main board
Remove the front panel.Remove the 4 screws at the swivel cassis and flip down themain board.Disconnect all plugs and cables.Remove the 2 screws attaching the swivel chassis to thecasing. 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 emptyNV-RAM. ATTENTION - When installing a new main board, make surethat 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 themain board.Disconnect the micro switches and the stepper motor from themain 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 hookmoves in and out smoothly.
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5-5DISASSEMBLY 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 theoverlay 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 andX13).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 fromthe 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 duringa short test run (resistor must heat up during braking –CAUTION it may be hot!).
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5-6DISASSEMBLY 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 mainboard (X10 and X11).Remove the AutoLock and the sensor cover. It is not necessaryto pull out the r
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