Toro Greensmaster TriFlex 3400 - Fault 88: 48 V Bus Overvoltage - Reel Motor 3

Fault88:48VBusOvervoltage–ReelMotor
3
Important:Forthisfault,theterm“keyswitch”referstothe48Vlogicpowercircuit,nottothe
ignitionswitch.
InfoCenterDisplay:
_____FAULT#88____
3-48VPOWER
BUSOVERV
FaultDescription
Areelmotorovervoltagefaultisreportedwhenthecuttingreelmotormeasuresasystemvoltagegreater
than67.5V.
ABusOvervoltfaultisdeclaredwhenthecomponentmeasuresasystemvoltageundertheallowedthreshold.
CircuitDescription
Eachcuttingunithasanelectriccuttingreelmotorthatcontainsaninternalcontroller.Theinternalcontroller
measures48Vbuspower.
Ifonly1cuttingreelmotorisreportingabusovervoltfault,theproblemislikelytobewiththe48Vpower
connectiontothatcuttingreelmotor.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page19).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page21)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Swapcuttingreelmotorsbetweencuttingunits.
Allofthecuttingreelmotorsareidentical.
1.GoPreparingforTroubleshootingand/orTesting(page20)andfollowthestepslisted.
2.Unplugthe48Vbatterydisconnecttopreventunexpectedcuttingunitoperation.RefertoConnectingand
Disconnectingthe48VPowertotheCuttingReelMotors(page18).
3.Swapcuttingreelmotor3withadifferentcuttingunit.Youcanobtainmoreinformationinthecuttingreel
motorsectionofChapter6intheGreensmasterTriFlex3320/3420ServiceManual.
4.Pluginthe48Vbatterydisconnect.RefertoConnectingandDisconnectingthe48VPowertothe
CuttingReelMotors(page18)
5.Operatethemachine.
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