LMVSeriesTechnicalInstructions
DocumentNo.LV5‐1000
SCCInc. Page1 Section7
7‐1:TroubleshootingIntroduction
TheLMV5hasanextensivelistoffaultcodestohelpclarifythenatureofanyfault.Section7‐3
describeswhateveryfaultcodeisandgivessomeguidanceonhowtocorrectit.
ThemostcommonissuesseenontheLMV5aredescribedingreaterdetailinSection7‐2to
offeradditionaltroubleshootinghelp.TheissuescoveredinSection7‐2are:
General
CANbusFaultsIncluding“AZLnotonBus”and“SystemTest”.......................................................2
FaultPositioningActuator–ErrorCode15....................................................................................6
InternalFaultActuator–ErrorCode19.........................................................................................7
FlameFailure–ErrorCode25or26...............................................................................................8
OpenCircuit/ShortCircuitSensorFaults–ErrorCodeA6(Diagnostics50…5A)..........................9
OpenSafetyLoop–ErrorCode21...............................................................................................10
LMV5WillNotStart(StaysinPhase12).......................................................................................11
LMV5WillNotModulateProperly...............................................................................................12
O2Trim
O
2
SensorisNotReading..............................................................................................................13
O
2
SensorReadingGrosslyHighorLow........................................................................................14
O
2
SensorReadsButRespondsVerySlowly.................................................................................14
AmbientorStackTemperatureSensorReadingIncorrectly........................................................15
AZLsays“O2ModulenotactiveornotAvailable”.......................................................................15
AZLSays“O2Setpointmustlie0.1%belowO2RatioControl”or“O2Setpointmustlie0.1%
aboveO2Min”........................................................................................................................16
AZLSays“MeasurementnotSuccessful”WhenMeasuringtheDelayTimeforO
2
Trim.............17
AZLSays“O2TrimControlAutomaticallyDeactivated”...............................................................18
VariableSpeedDrive(VSD)
VSDWillNotOperate....................................................................................................................19
UnsuccessfulVSDStandardization...............................................................................................20
AZLSays“FanSpeedNotReached”or“ControlRangeLimitationVSDModule”........................22
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