Fault33:48VoltKeyswitchUndervolt–
ReelMotor1
InfoCenterDisplay:
____FAULT#33____
148V
KEYSWITCHUNDER
V
Important:Forthisfault,theterm“keyswitch”referstothe48Vlogicpowercircuit,nottothe
ignitionswitch.
Note:Ifmultiplemachinefaultsarereportedwithinafewseconds,troubleshootingshouldbeginwiththe
rstcuttingreelmotortoreportafault.
FaultDescription
Akeyswitchundervoltagefaultisreportedwhenthecuttingreelmotormeasuresthe48Vlogicvoltageatless
than32V.
CircuitDescription
Eachcuttingunithasanelectricreelmotorthatcontainsaninternalcontroller.Theinternalcontrollermeasures
asteady48Vsignal,calledlogicpower.
Ifonly1cuttingreelmotorisreportingakeyswitchundervoltfault,theproblemismorelikelytobewiththe48V
logicpowerconnectiontothatcuttingreelmotor.
Ifmorethan1cuttingreelmotorisreportingakeyswitchundervoltfault,theproblemismorelikelytobe
withthe48Vbusvoltage.
Ifmorethanonedeviceisreportingthisfault,checkthebatteryvoltagewiththeengineOFF,andagainwith
theenginerunning.
IfthebatteryvoltageisgoodwithengineOFFbutnotON,checktheStarter/Generator.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page19).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page21)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:ChecktheInfoCenterfortheReelsEnableindication.
TheReelsEnableindicationontheInfoCenterDiagnosticsscreenidentieswhethertheTEC-5001outputexists
toenergizethe48VLogicrelay.Thisrelayprovides48Vlogicpowertothereelmotorsandstarter/generator.
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