Troubleshooting Chart; Table 3 Troubleshooting Chart - Curtis MultiMode 1228 Manual

LED PROGRAMMER
CODE LCD DISPLAY
THERMAL CUTBACK
1,1
THROTTLE FAULT 1
1,2
SPD LIMIT POT FAULT
1,3
LOW BATTERY VOLTAGE
1,4
OVERVOLTAGE
1,5
MAIN OFF FAULT
2,1
MAIN CONT FLTS
2,3
MAIN ON FAULT
2,4
PROC/WIRING FAULT
3,1
BRAKE ON FAULT
3,2
PRECHARGE FAULT
3,3
BRAKE OFF FAULT
3,4
HPD
3,5
CURRENT SENSE FAULT
4,1
HW FAILSAFE
4,2
EEPROM FAULT
4,3
POWER SECTION FAULT
4,4
* Jack up vehicle and retest to confirm diagnosis. Clean connections, inspect system wiring, and retest.
Curtis 1228 Manual,
Rev. F

Table 3 TROUBLESHOOTING CHART

EXPLANATION
over-/under-temperature cutback
throttle fault
speed limit pot fault
battery voltage too low
battery voltage too high
main contactor driver Off fault
main contactor fault
main contactor driver On fault
HPD fault present for >10 sec.
brake On fault
precharge fault
brake Off fault
HPD (High Pedal Disable) fault
current sense fault
motor voltage fault (hardware
failsafe)
EEPROM fault
power section fault
7 — DIAGNOSTICS & TROUBLESHOOTING
POSSIBLE CAUSE
1. Temperature >92°C or < -25°C.
2. Excessive load on vehicle.
3. Operation in extreme environments.
4. Electromagnetic brake not releasing.
1. Throttle input wire open or shorted.
2. Throttle pot defective.
3. Wrong throttle type selected.
1. Speed limit pot wire(s) broken or shorted.
2. Broken speed limit pot.
1. Battery voltage <17 volts.
2. Bad connection at battery or controller.
1. Battery voltage >36 volts.
2. Vehicle operating with charger attached.
3. Intermittent battery connection.
1. Main contactor driver failed open.
1. Main contactor welded or stuck open.
2. Main contactor driver fault.
3. Brake coil resistance too high.
1. Main contactor driver failed closed.
1. Misadjusted throttle.
2. Broken throttle pot or throttle mechanism.
1. Electromagnetic brake driver shorted.
2. Electromagnetic brake coil open.
1. Low battery voltage.
2. KSI and throttle turned on at same time.
1. Electromagnetic brake driver open.
2. Electromagnetic brake coil shorted.
1. Improper sequence of throttle and KSI,
push, or inhibit inputs.
2. Misadjusted throttle pot.
1. Short in motor or in motor wiring.
2. Controller failure. *
1. Motor voltage does not correspond to
throttle request.
2. Short in motor or in motor wiring.
3. Controller failure. *
1. EEPROM failure or fault.
1. EEPROM failure or fault.
2. Short in motor or in motor wiring.
3. Controller failure. *
45