Genie GRC-12 Service Manual

Also see for Lift Guard GRC-12: Operator's manual supplement Operator's manual

Contents

Genie GRC-12 Service Manual Manual pdf 94 page image

REV ASeptember2016Section 5 • Diagnostics5 - 4 GRC Part No. 227123DIAGNOSTICSOperational Indicator Codes(OIC)These codes are generated by the electricalsystem to indicate machine operating statussuch as Off-level, Chassis Mode Operation andPothole Guard Stuck, during normal operation.These codes are not indicators of a devicemalfunction in the electrical system.Code ConditionLL Off-LevelCH Chassis Mode OperationPHS Pothole Guard StuckND No Drive (option)Diagnostic Trouble Codes (DTC)These codes are generated by the system toindicate that a device or circuit malfunction hasbeen detected in the electrical system.The types of Diagnostic Trouble Codes that mayoccur are explained below.Type "HXXX" - Indicate a malfunctionassociated with devices that control hydraulicfunctions in the electrical system. The "HXXX"faults are divided into short circuit batterynegative, short circuit to battery positive, opencircuit and generic shorts. Example of thesedevices are solenoid controlled hydraulic valvesand motor controller.Type "PXXX" - Indicate a malfunction associatedwith power type devices in the electrical system.The "PXXX" faults are divided into short circuit tobattery negative, short circuit to battery positive,open circuit and generic shorts. Example ofthese devices are horns, sensor power andalarms.Type "UXXX" - Indicate a malfunction associatedwith user interface devices in the electricalsystem. The "UXXX" faults are divided into shortcircuit to battery negative, short circuit to batterypositive, open circuit and generic shorts.Example of these devices are GCON up anddown switches and PCON drive joystick faults.Type "FXXX" - Indicate a malfunction associatedwith machine feedback devices in the electricalsystem. The "FXXX" faults are divided into shortcircuit to battery negative, short circuit to batterypositive, open circuit and generic shorts.Example of these devices are limit switches,height sensors and pressure transducers.Type "CXXX" - Indicate a malfunction associatedwith controls devices in the electrical system.Example of these devices are platform controlsand ground controls ECM.