Toro Reelmaster 5010- H - Fault 99: 48 V Bus Overvolt-M;G

Fault99:48VBusOvervolt—M/G
InfoCenterDisplay:
_____ FAULT#99 _____
48VBusHIV
FaultDescription
Systembusvoltageover65Vdchasdisabledthegenerator.ABusOvervoltindicatesthe48Vdcbuscircuit
hasexceededanover-voltagesetpoint(65Vdc).Thisfaultcausesthemotortodisable.
CircuitDescription
Themotor/generatorcontrollermonitorsthe48Vbusvoltage.
ConditionsforSettingtheFault
The48Vdcbuscircuithasexceededanover-voltagesetpoint(65Vdc).
Note:ThisfaultcanalsooccuriftheTEC-5002losescommunicationwiththemotor/generatorandreverts
tolimpmode.WhentheTEC-5002losescommunication,itlosesenginespeedcontrol,andthemechanical
governorlimitsenginespeedto3,200rpm.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page21).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page22)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Determinethetroubleshootingstrategy.
Ifonlythemotor/generatorisreportinga48VBusOvervolt,theproblemismorelikelytobewiththe48Vdcbus
connectiontothemotor/generator.GotoStep3.
Ifmorethan1cuttingreelmotorandthemotor/generatorarereportinga48VBusOvervolt,theproblemismore
likelytobewiththe48Vdcbusvoltage.PerformtheRecommendedServiceActionsforfault30.
Step3:Withtheengineshutoff,checkthe48Vdcbatterysystem.
1.Raiseandsupporttheoperator’sseat,thenremovethecoverfromthemaincontactor.SeeFigure158.
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