Cushman MINUTE MISER Technician's Repair And Service Manual page 57

ELECTRONIC SPEED CONTROL
Read all of manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notes, Cautions and Warnings
LED
PROGRAMMER LCD DISPLAY
CODE
1,2 HW FAILSAFE
1,3 M-FAULT
1,4 SRO
2,1 THROTTLE FAULT 1
2,2 BB WIRING CHECK
2,3 HPD
2,4 THROTTLE FAULT 2
3,1 CONT DRVR OC
3,2 DIR CONT WELDED
3,4 MISSING CONTACTOR
4,1 LOW BATTERY VOLTAGE
4,2 OVERVOLTAGE
Page F-2
TROUBLESHOOTING CHART
EXPLANATION
hardware fail-safe error
M-output shorted
SRO fault
5kOhm-0 or wiper fault
emer, reverse wiring fault
HPD sequencing fault
Pot Low broken or shorted
driver output overcurrent
welded direction contactor
missing contactor or shunt
low battery voltage
overvoltage
Fig. 4 Troubleshooting Chart
Owner's Manual and Service Guide
POSSIBLE CAUSE
1. Controller defective.
1. M-output shorted to ground.
2. Direction contractor not closing.
3. Direction contractor not closing fast
enough.
4. Internal motor short to ground.
1. Improper sequence of KSI, brake
and direction inputs.
2. Wrong SRO type selected.
3. Brake or direction switch circuit
open.
4. Sequencing delay too short.
1. Throttle input wire open.
2. Throttle input wire shorted to ground
or B+.
3. Throttle pot defective.
4. Wrong throttle type selected.
1. BB wire open.
2. BB check wire open.
1. Improper seq. of KSI, brake, throttle
inputs.
2. Wrong HPD type selected.
3. Misadjusted throttle pot.
1. Pot Low wire open.
2. Pot Low wire shorted.
3. Wrong throttle type selected.
1. Direction contactor coil shorted.
2. Shunt field shorted.
1. Direction contactor stuck closed.
1. Direction contactor coil open.
2. Direction contactor missing.
3. Shunt field open.
4. Wire to shunt or direction contactor
open.
1. Battery voltage <16 volts.
2. Corroded battery terminal.
3. Loose battery or controller terminal.
1. Battery voltage >45 volts.
2. Vehicle operating with charger
attached.