IQ DISPLAY MODULE (IQDM) AND IQDM-P
DIAGNOSTICS: EXCEL SYSTEM
Faults Menu
14
SPEED SENSOR
If the speed controller does not detect pulses from the speed sensor while the controller outputs power (greater than
75% armature PWM) to the motor, a
speed sensor
fault is detected.
MAIN WELDED
If the speed controller detects that the solenoid contacts are welded closed, a
main welded
fault is detected.
MAIN DRIVER ON
If the FET that controls the closing of the solenoid contacts is found to be energized when it should not be, a
main
driver on
fault is detected by the speed controller.
MAIN DRIVER OFF
If the FET that controls the closing of the solenoid is
not
energized when it should be, a
main driver off
fault is
detected by the speed controller.
MAIN COIL OPEN
If the speed controller determines that the solenoid is not closing as a result of a solenoid coil failure, a
main coil
open fault
is detected.
FIELD MISSING
If the speed controller is operating at a duty cycle of greater than 90% (almost full speed) and the field current is less
than 3 amps, a
field missing
fault is detected by the speed controller.
HPD
The
HPD
(High Pedal Detect) fault is detected if the accelerator pedal is already depressed when the key switch is
turned to the ON position. This fault is also detected if the accelerator pedal is pressed when the selected direction
is changed by pressing the Forward/Reverse switch. This fault, when not caused by the operator, can indicate
that the pedal limit switch has failed closed.
OVERVOLTAGE
If the speed controller detects that the battery voltage is too high (68.4 to 75.6 volts DC), the
overvoltage
fault
is detected.
2009 Electric Precedent Maintenance and Service Manual
Page 14-11
Содержание 2009 Precedent
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