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sig,rna @ ServiceManual or CentrifugesSection : Service nformation2.2 Error ist2.2.1Error ist for RoseGontrolUnitEnorcode What happened? Effect User Service1, l a121 ?1 41 51 640

Error n speed nterruptError n PBM nterruptError n MPX nterruptError n poll ingOverfrequencyStack OverflowHardwareWatchdogPBM Overrun

ResetError s indicatedduring tandsti l lRu n s continuedOperating fcentrifugesblocked

- Mainsofflon ExchangeEEPROMExchangeEPROMCheckhardware

21zz24282 1 . . . 3 5

OvervoltageSpeedsignaldefectiveOversoeedRotorblocked r stif fSeveralof theseerrorsoccurred imultaneouslv

Centrifuge lowsdownand stopsOperating fcentrifugesblocked

Allow centrifuge oslowdownan d stooMainsofflonCheck egulatoran d relayCheckspeedsensorCheck rotor

4142 SpeedoverrunMPX overrun- Errormessageuntilnext ey sDresseo

Pressan ykey

5 0 . . . 5 9 Incorrectdata from theEEPROMare used orcalculationsOperating fcentrifugesblockedFast stop

- EraseEEPROM

60 Insutficient ackup olta geafter reset - Fast top scarried ut Allow centrifuge oslowdownan d stoDPress id kevo9 Software sed s not suitablefor centrifuge

- Operating fcentrifugesblockedExchangeEPROMoreraseEEPROMtype code71 EEPROMmissing - Operatingofcentilfuge sblockedlnsertEEPROM

7273/ cEEPROM riteerrorError n program atasetError ndatasetofcharacteristicuryesError n backup ataset

InterruptionuringprogrammrngIncorrectrogramNo. s displayedlncorrect o.ofcharacteristiccurve s displayedErrormessageuntilnextkey soressed

Press nykey oerase ata n heEEPROM- EraseEEPROMdatasets- ExchangeEEPROMferroroccursrepeatedly

76 EEPROM emory elldefective - Operatingofcentrifugesblocked- Faststop

- ExchangeEEPROMA 1 'Lid open'detected hilecentrifuges running Fast top Allowcentrifuge oslowdownand stopClose id

Check id switch

82 Prooramruntimeerror Faststop Allow centrifuge oslowdown and stopPress id kev

lssue07/96 Seaion Pege 0

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sil=',mra @ Service Manual or CentrifugesSection2: Service nformation

83 Keyboarddefective Operatingfcentritugesblocked

- Check keyboard

848586

Overtemperatureeat sinkOvertemperature otorchamberRefrigerationystem does notcool o pre-set emperature

Fast topFaststopFast top

Allow o cool downAllow o cool downRaise etpointtemperature

- Checkheatsink- Check rotorchamberswitch- Checktemperaturesensorsanorefrigerationsvstem90. . .97 Temperature ensordefective(shortcircuit r broken) Fast stop - Checktemperaturegensors

98 No rotor dentification Faststop Press' l id ' ey Check rotoridentif icationRotor dentified, ut ncorrecttvoe of rotor Faststop Insertselected otorPress' l id ' ev

Errormessages an be causedbothby interna l nd external nterference ulses.Thesecan be eliminated implyby a 'reset'= mainsoff/onor by pressing pecialcombinationsf keys seesection .1,3).The measures isted under 2.1 conceming interferencesuppression mustalwaysbe carried out to ensure maximumprotectionagainst nteference.However,nterferenceources n the vicinity f the centrifuge,or instance oorlyshieldedmicrowavequipment tc.as wellas atmosphericisturbances, aycauseunjustified rror messages. n these cases removeor shield the source ofinterference.lf such a fault cannotbe removed, lease ontactour service.The errormessages re describedn the ollowing ubsectionsn numerical rder.Seealso heerrors is ton theprevious age.2.2.1.1 RROR 0_16+ 40These error messagesare caused by radio interference nd can usually beeliminatedy carrying ut a reset mains ff/on).lf the erroroccurs epeatedly fterswitching n the mains, t is causedby a memorymalfunction.he malfunction ayhaveoccurredn the RAM,EPROM,EEPROM rmicroprocessor.n this case all memory omponents ustbe exchanged ne aftertheotherby rialanderror. t maybe advisableo replacehe microcontrolleroard.2.2.1.2ERROR 1, Oveloltage in the ntermediateircuitSee section 5.3.2.2 intermediate circuit.An overvoltagen the ntermediateircuit ccurs f the mains oltage xceeds 7OVor 385V DC are exceededn the ntermediateircuit. hecentrifuges not designedlssue 7/98 Section Page11

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sicg,ma @ ServiceManualor CentrifugesSection : Service nformationfor suchovervoltages.n suchcases educehemains oltage y meansof suitabletransformer.TheDCvoltage anexceed385 V duringbrakingf the braking esistorR87or thebraking ransistorV85 are defective.Malfunctions f the braking chopper, seesection .3.2.5 rakingchopper,canalsoGtusehiserrormessage.2.2.1.3ERROR 2,SpeedsensordefectiveSeesection7.3. speed sensor.The distancebetweenmagnet and Hall sensoron the speed sensorboard must be1 + 0.5mm.Check the magnet on the motor. The Hall sensormust generate six pulses perrevolution. se est board No. 70236, f available,or testing.Slippage f the rotoron the driveshaftcan alsocause hiserror.Checkwiringand plugconnections.2.2.1.4ERROR 4,OverspeedThe speedexceeds he setpointvalue by more han 15%.This can happenwhenvery light rotors are accelerated o their final speed with maximumacceleration.Selection f a sloweracceleration urve, .g.No.8, willsolve hisproblem.This error can also occur if the setpointspeed s altered repeatedlyduring a runwithoutwaiting or the speed control o reach heprevious etpointspeeds.2.2.1.5ERROR 8,Rotorblockedor stiffThis error occurs if the microcontrollerstarts up the motor and supplies voltage butreceives o feedbackor no plausible eedback oncerningmotorspeed.. Checkwhethermotoror rotor are in fact blockedor stiff.. Check he rotorchamber or foreignobjects.All malfunctionsn the powersupplywhichpreventhe motor rom startingup lead othis errormessage.o Check ectifiers, elays,power ransistors nd microfuse 1.o Checkwiringof motor.The speedsensorcan also use this error message, articularlyf there is a weakmagnetsegmentor the distancebetween he magnet egmentand the hall sensor stoo large.See section7.3 speed sensor.

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sftg,mra @ ServiceManualor CentrifugesSection : Servicenformation2.2.1.6ERROR 1 - 42,Speedoverrun MPX'overrunAn undefinednterferenceGlusesa softwareerror.The run can be resumedbypressing nykeyon thekeYPad.lf theerroroccursegularly fterswitchingnthemains,t is caused y a fault n theRAM,EPROM, EPROM r microprocessor.eplace efectiveomponent. bserveinstructionsn section .3.2.2.1.7ERROR 0- 59Calculationsavebeenmadewith ncorrect ata rom he EEPROM. he EEPROMmustbeerased. eesection .3servicemode inputof offsetvalues.

2.2.1.8ERROR 0, nsufficient owerbackup oltageThe centrifugeun is resumedafter a brief mains ailure ca.30 sec).This, however,only occurs f the rotor s still turningwhen the mainsvoltage eturnsand the voltageat C5 of the voltagesupply does not fall below2.5 V. This voltage s required ostore he dataof a run which s in progress.lf the voltagehas fallen below 2.5 V, the data of the run are lost and the centrifugecoasts reely.After the mains voltagereturnsand an additionalmains off/on resethas beencarriedout, a new run can be startedduringcoasting.lf ERROR60 occurs requently, heck he circuit or the powerbackupvoltage n thepower upply.Seesection5.3.2.2.2.1.9ERROR 9,Software nsuitableorcentrifugeThis errormayoccuraftera repair.Checkwhetherhe softwareEPROM) s in factunsuitable.The system tring n the EEPROMmay be incorrect ftera repair.Erasesystemstringnthe EEPROM,eesection .3 servicemode inputof offsetvalues.lf ERROR 9 cannot e eliminatedy erasinghe system tring,he EEPROMmustbe replaced.See section4.3 service mode - input of offset values and section4.5 exchange f memorycomponents.Caution: ERROR69 occurs on exchanging n EPROM, .9. when using anew specialtype of rotor withouthavingerased he system stringin the EEPROM.2.2.L 0 ERROR 1, LidOpen'while entrifuges runningThis erroroccurs f the emergency ock release s actuatedduring a centrifugerun. Afast stop follows automaticalty.The centrifugecan be restartedafter the rotor haslssue07/98 Section Page13

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=iema @ ServiceManualor CentrifugesSection : Servicenformationcome to a standstill, he lid has been closed and a mains offlon reset has takenplace.lf the lid was not in fact open,check id locks,switches nd wiring.2.2.1.11 RROR 2,Program untime rrorWhen hissoftware rroroccurs, esetafterstandstill f centrifuge y actuatinglid'key.2.2.L12 ERROR 3,KeyboarddefectiveThe messageappearsafter switching n the centrifuge. eplace oi l keyboardrespectivelyeparate utton late n rontpanel.Themessage lsoappearsf a key s pressed y mistake uring he switching n ofthemains.t is n hiscaseonlyan operatingrror.Checkwhether key nthe rontpanel s ammed.Check iring ndplugconnections.2 .2 .1 .13ERROR84 - 862.2.1.13.1RROR4,Overtemperaturefheat inkAllowheatsink o cool down.Check an of powerboard.Lower oom emperatureandavoiddirectexposureo sunlight.Check hewiringand emperatureensorontheheat ink see ection .1 2).2.2.1.13.2 RROR5,Overtemperaturenrotor hamberA mechanicalemperature witchswitcheshe centrifuge ff at approx.70 'C if thetemperature ontrol unit fails. See section7.1.3safety thermostat and section9.2 refrigerationof centrifuge.

2.2.1.13.3 RROR6,Refrigerationoes otcoolopre-setemperature.This error occurs predominantlyf the starting emperature s close to roomtemperature nd the selectedovertemperatures set relatively ar below roomtemperature.The error also occurs if the oveftemperatures set so low that under normaloperating onditionshe emperatureannotall below he setpoint.A defectn the refrigerationystem r fan (leakage tc.)also eads o ERROR 6. fthis s thecase, alla refrigerationngineer.Contaminationf the coolingagentcondensor, irectexposureo sunlight r otherheatsourcesalso diminish he performancef the refrigerationystemand canlssue 7/98 SectionPage 4

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siemre @ ServiceManualor CentrifugesSeclion : ServicenformationcauseERROR 6. Cleaning f thecoOling gent ondensor r removinghesourceofheathelps o solve hisproblem.2.2.1.14 RROR 0- 972.2.1,14.1ERROR 0,Temperatureensorn rotor hamber efectiveThe temperature sensor in the rotor chamber does not provide plausiblemeasurement alues. Check if the sensor has short circuited or broken and, ifnecessary, eplace the sensor.See section7.1 temperaturesensor.2.2.1.14.2ERROR91 - 94. Enor messageor sensorswhichare not connectedat thetime.2.2.1.14.3 RROR 5,Temperatureensor'heatink' efectiveSeeERROR90.2.2.1.14.4 RROR 6 97SeeERROR91 - 94.2.2.L15 ERROR98,No rotor identificationThemicrocontrolleroesnot dentify rotoror oneof the ollowingeasons:o Thedistance etweenhe Hallsensor nd hecodingmagnet n therotor s toogreat.The distancemustbe a minimum f 0.8mmanda maximum f 2.0 mm.leasrreby usinga pieceof puttyor wax.Sticka pieceof puttyof more han 2mm o theHallsJnsor,put he rotor n place nd hen ake t off again.Measurethe hickness f the lattened ieceof puttybymeans f a slidegaugeor similarinstrument.he distance an be reduced y placingU-washers ndemeathheHallsensor,or examPle.o Defect n the sensorelectronics, iringor plugconnections. ee sectiorr-7.4rotor identification. The test board (part No. 70236) is useful for these

investigations.2.2.1.16ERROR99,Rotor dentified, ut ncorrect ypeof rotorComparereselectedotornumber ithnumberf rotorusedandalternumber,fnecessary.The nstructionsn section2.2.1.15 realsoapplicable.

lssue 7/98 Section Page15