Cushman SHUTTLE 4X Technician's Repair And Service Manual page 170

TROUBLESHOOTING
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
B
1311 Display
High Pedal Disable
Controller powers up
with Key, Direction and
HPD (HIGH PEDAL
Throttle applied OR
DISABLE)
Throttle applied before
Key and Direction
switch applied
THERMAL
Over/Under
CUTBACK
Temperature Cutback
Battery Voltage >
OVERVOLTAGE
OVERVOLTAGE MIN
parameter
Battery Voltage < LOW
LOW BATTERY
VOLTAGE MAX
VOLTAGE
parameter
THROTTLE FAULT Throttle Input Fault
1 - Reduce Armature duty cycle to zero.
2 - Reduce Field current to zero
3 - Turn off Main Contactor
4 - "Limp Home" in slow speed. Armature Duty Cycle = 75% Max, Field Min = 10.0 Amps
5 - Gradual reduction in armature Drive current limit
6 - Quickly reduce armature duty cycle to zero until speed sensor pulses reappear
7 - Gradual Reduction in Regen Current Limit
8 - Internal Scaled Throttle Signal set to Zero
9 - Commence WalkAway Function
Page R-2
Explanation Tested When
KSI ON, Forward or
Reverse ON
Continuous
Continuous
Continuous
Continuous
Controller Fault Responses
Repair and Service Manual
Controller Recover
Response When
8 Throttle < 25%
5 Condition clears
7 Condition clears
5 Condition clears
8 Condition clears
Possible Cause
1. Incorrect sequence of Vehicle input
controls
2. Defective Throttle device
1. Temperature >85°C or < -25°C
2. Excessive load on vehicle
3. Improper mounting of controller
4. Operation in extreme environment
1. Battery Voltage > Shutdown limit
1. Battery Voltage < Cutback Limit
2. Corroded Battery Terminal
3. Loose Battery or Controller terminal
1. Throttle wiring open or shorted
2. Defective Throttle device