Toro Reelmaster 5010- H - Fault 93: 48 V Bus Undervolt-M;G

Fault93:48VBusUndervolt—M/G
InfoCenterDisplay:
_____ FAULT#93 _____
48VBusLOV
FaultDescription
Themotor/generatorcontrollerhasdetectedthatthe48Vdcbusdroppedbelowthelowvoltagelimit.
CircuitDescription
Themotor/generatorsuppliesthe48Vdcbuspowertothe48Vdcbatterypack.
ConditionsforSettingtheFault
WhentheM/Gcontrollerdetectsthatthe48Vdcbushasdroppedbelowthelowvoltagelimitof36Vdc,
theM/Gcontrollerdisablesitsmotor.TheTEC-5002ltersthisfaultandallowsittooccuronlywhenthe
motor/generatorcontactorisclosed.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page21).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page22)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Determinethetroubleshootingstrategy.
Ifonlythemotor/generatorisreportinga48VdcBusUndervolt,theproblemismorelikelytobewiththe48Vdc
busconnectiontothemotor/generator.GotoStep3.
Ifmorethan1cuttingreelmotorandthemotor/generatorarereportinga48VdcBusUndervolt,theproblemis
morelikelytobewiththe48Vdcbusvoltage.PerformtheRecommendedServiceActionsforFault29:48V
BatteryLowVoltage(page101).
Step3:Testthemain48Vdccontactor.
1.Raiseandsupporttheoperator’sseat,thenremovethecoverfromthemaincontactor.SeeFigure155.
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