IQ DISPLAY MODULE (IQDM) SERIES 2 AND IQDM-P DIAGNOSTICS
Faults Menu
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 12-7
12
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
Fault Recovery
When a fault is detected by the speed controller, the speed controller will attempt to recover from the fault and
resume normal operation. In the case of an intermittent problem such as a loose wiring connection, the con-
troller
may
be able to recover and operate normally for a while, but the problem should be repaired before
placing the vehicle in service.
CONTROLLER
FAULT
CONTROLLER
RESPONSE
HW FAILSAFE
A, B, C
THROTTLE FAULT 1
A
SPEED SENSOR
D
MAIN WELDED
D
MAIN DRIVER ON
D
MAIN DRIVER OFF
A, C
MAIN CONT DNC
B
MAIN COIL FAULT
A
FIELD MISSING
A, B, C
HPD
A
PROC/WIRING
A
OVERVOLTAGE
A, B, G
UNDERVOLTAGE
E
THERMAL CUTBACK
E
MOTOR STALL
F
MAIN DROPOUT
A, C
OPEN ARMATURE
A
MAX PASSWORD TRIES
(no action taken)
INCORRECT PASSWORD
(no action taken)
HIGH SPEED WALKAWAY
D
KEY SWITCH SRO
C