Curtis 1228 Manual, Rev. F
45
7 — DIAGNOSTICS & TROUBLESHOOTING
Table 3 TROUBLESHOOTING CHART
LED PROGRAMMER
CODE LCD DISPLAY
EXPLANATION
POSSIBLE CAUSE
1,1 THERMAL CUTBACK over-/under-temperature cutback 1. Temperature >92°C or < -25°C.
2. Excessive load on vehicle.
3. Operation in extreme environments.
4. Electromagnetic brake not releasing.
1,2 THROTTLE FAULT 1 throttle fault 1. Throttle input wire open or shorted.
2. Throttle pot defective.
3. Wrong throttle type selected.
1,3
SPD LIMIT POT FAULT speed limit pot fault 1. Speed limit pot wire(s) broken or shorted.
2. Broken speed limit pot.
1,4
LOW BATTERY VOLTAGE battery voltage too low 1. Battery voltage <17 volts.
2. Bad connection at battery or controller.
1,5 OVERVOLTAGE battery voltage too high 1. Battery voltage >36 volts.
2. Vehicle operating with charger attached.
3. Intermittent battery connection.
2,1
MAIN OFF FAULT main contactor driver Off fault 1. Main contactor driver failed open.
2,3
MAIN CONT FLTS main contactor fault 1. Main contactor welded or stuck open.
2. Main contactor driver fault.
3. Brake coil resistance too high.
2,4 MAIN ON FAULT main contactor driver On fault 1. Main contactor driver failed closed.
3,1 PROC/WIRING FAULT HPD fault present for >10 sec. 1. Misadjusted throttle.
2. Broken throttle pot or throttle mechanism.
3,2 BRAKE ON FAULT brake On fault 1. Electromagnetic brake driver shorted.
2. Electromagnetic brake coil open.
3,3 PRECHARGE FAULT precharge fault 1. Low battery voltage.
2. KSI and throttle turned on at same time.
3,4
BRAKE OFF FAULT brake Off fault 1. Electromagnetic brake driver open.
2. Electromagnetic brake coil shorted.
3,5 HPD HPD (High Pedal Disable) fault 1. Improper sequence of throttle and KSI,
push, or inhibit inputs.
2. Misadjusted throttle pot.
4,1
CURRENT SENSE FAULT current sense fault 1. Short in motor or in motor wiring.
2. Controller failure.
*
4,2
HW FAILSAFE motor voltage fault (hardware 1. Motor voltage does not correspond to
failsafe) throttle request.
2. Short in motor or in motor wiring.
3. Controller failure.
*
4,3
EEPROM FAULT EEPROM fault 1. EEPROM failure or fault.
4,4
POWER SECTION FAULT power section fault 1. EEPROM failure or fault.
2. Short in motor or in motor wiring.
3. Controller failure. *
* Jack up vehicle and retest to confirm diagnosis. Clean connections, inspect system wiring, and retest.
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