IQ DISPLAY MODULE (IQDM) AND IQDM-P
DIAGNOSTICS: EXCEL SYSTEM
Faults Menu
14
The speed controller, after detecting a fault, will respond in one or more of the following ways:
• A. Reduce vehicle speed to zero by reducing armature current
• B. Reduce vehicle speed to zero by reducing field current to zero
• C. Turn off the solenoid
• D. Cause the vehicle to run at half speed
• E. Gradually reduce the armature current limit
• F. Quickly reduce the armature current until speed sensor pulses occur
• G. Reduce field current and beep reverse buzzer at a fast rate
CONTROLLER FAULT
CONTROLLER RESPONSE
HW FAILSAFE
A, B, C
THROTTLE FAULT
A
SPEED SENSOR
D
MAIN WELDED
D
MAIN DRIVER ON
D
MAIN DRIVER OFF
A, C
MAIN COIL OPEN
A
FIELD MISSING
A, B, C
HPD
A
OVERVOLTAGE
A, B, G
LOW BATTERY
E
THERMAL CUTBACK
E
MOTOR STALL
F
MAIN DROPOUT (1 and 2)
A, C
MAX PASSWORD TRIES
(no action taken)
INCORRECT PASSWORD
(no action taken)
BLD OVERCURRENT
Not Applicable At This Time
MAIN DRIVER OVERCURRENT
A, B
CURRENT SENSE FAULT
A, B
M– SHORTED
A, B, C
2009 Electric Precedent Maintenance and Service Manual
Page 14-9