Toro Reelmaster 5010- H - Fault 87: 48 V Key Switch Overvolt-M;G

Fault87:48VKeySwitchOvervolt—M/G
Important:Forthisfault,theterm“keyswitch”referstothe48Vdclogicpowercircuit,nottothe
ignitionswitch.
InfoCenterDisplay:
_____ FAULT#87 _____
48V HIV
FaultDescription
Themotor/generator(M/G)controllerhasdetectedthatthelogicvoltagehasexceededthehighvoltagelimit.
CircuitDescription
TheM/Gsharesthe48Vdclogicpowerwithall5cuttingreelmotors.
ConditionsforSettingtheFault
WhentheM/Gcontrollerdetectsthatthe48Vlogiccircuithasexceededtheovervoltagethresholdof65
Vdc,theM/Gcontrollerdisablesitsmotor.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page21).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page22)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Determinethetroubleshootingstrategy.
Ifonlythemotor/generatorisreportinga48VKeySwitchOvervoltfault,theproblemismorelikelytobewiththe
48Vdclogicpowerconnectiontothemotor/generator.GotoStep3.
Ifmorethan1cuttingreelmotorandthemotor/generatorarereportinga48VKeySwitchOvervoltfault,the
problemismorelikelytobewiththe48Vdcsystemvoltage.PerformtheRecommendedServiceActions
forfault31.
Step3:Withtheengineshutoff,checkthe48Vdcbatterysystem.
The48Vdcbatterypackiscomposedof4sealed12VdcAGMbatteriesconnectedinseries.
1.Raiseandsupporttheoperator’sseat,thenremovethecoverfromthemaincontactor.SeeFigure147.
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