Toro Greensmaster TriFlex 3400 - Fault 99: 48 V Key Switch Overvolt - Reel Motor 2

Fault99:48VKeySwitchOvervolt–Reel
Motor2
InfoCenterDisplay:
_____FAULT#99____
2-48V
KEYSWITCHOVERV
Important:Forthisfault,theterm“keyswitch”referstothe48Vlogicpowercircuit,nottothe
ignitionswitch.
FaultDescription
Cuttingreelmotor2hasdetectedthatthe48Vlogicvoltagehasexceededthehighvoltagelimitof67.5V.This
faultcausesthecuttingreelmotortobedisabled.
Note:All48Vdevicesareconnectedtothesame48Vbus.Ifthisisasystemissue,theTECcombinesall
48VKeySwitchOvervoltfaultsintoasinglefault.
CircuitDescription
All3cuttingreelmotorssharethe48Vlogicpowerwiththestarter/generator.
Note:ThisfaultcanalsooccuriftheTEClosescommunicationwiththemotor/generator.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page19).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page21)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Determinethetroubleshootingstrategy.
Ifonly1cuttingreelmotorisreportinga48VKeySwitchOvervoltfault,theproblemismorelikelytobewiththe
48Vlogicpowerconnectiontothatcuttingreelmotor.GotoStep3.
Ifmorethan1cuttingreelmotorisreportinga48VKeySwitchOvervoltfault,theproblemismorelikelytobe
withthe48Vsystemvoltage.PerformtheRecommendedServiceActionsforfault46.
Step3:Inspectthewiringforcuttingunit2.
1.GotoPreparingforTroubleshootingand/orTesting(page20)andfollowthestepslisted.
2.Disconnectthecuttingunitsfromthe48Vpowersystembyseparatingthecuttingunitpowerconnectors.
Thispreventsunexpectedoperationofcuttingunits.RefertoConnectingandDisconnectingthe48
VPowertotheCuttingReelMotors(page18).
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