ELECTRICAL SYSTEM AND TESTING: ELECTRIC
VEHICLES
Troubleshooting
22
TROUBLESHOOTING GUIDE 1
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Loose or disconnected motor field coil wires at
motor or speed controller or broken wire
Repair and/or connect the field coil wires
Failure of the motor field windings
See Section 27 – Motor (Model DA5-4006):
Diagnostic Menu – FIELD MISSING
fault code
Failure of the FET’s that control field current
Replace the speed controller.
Controller Removal on page 24-12.
Diagnostic Menu – HPD (high pedal
detect) fault code
Operator error
Train operators to fully remove foot from
accelerator pedal before turning key switch to the
ON position or changing the selected direction
with the Forward/Reverse switch
Batteries require charging
Place batteries on battery charger and allow them
to fully charge
Diagnostic Menu – LOW BATTERY
fault code
Improperly maintained or failed batteries
See Section 25 – Batteries: Electric Vehicles.
Diagnostic Menu – MOTOR STALL
fault code
Operator error
Train operators to use the brake to hold the
vehicle on a hill, rather than holding the vehicle on
a hill using the accelerator pedal
Loose or disconnected motor armature wires at
motor or speed controller or broken wire
Repair and/or connect the motor armature wires
Failure of the motor armature or brushes
See Section 27 – Motor (Model DA5-4006):
Diagnostic Menu – OPEN ARMATURE
fault code
Failure of the FET’s that control armature current
Replace the speed controller.
Controller Removal on page 24-12.
2007-2009 Turf 252, Carryall 252 and XRT 900 Maintenance and Service Manual
Page 22-7
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