Wheel System - Traction
122
Service Manual – SC1500
Status LED Fault Code Table
LED
Code
Status Light
Display
Explanation
Possible Cause
1,1
0 0
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
0 00
Throttle fault
1. Throttle input wire open or shorted
2. Wrong throttle type selected
1,3
0 000
Speed limit pot fault
1. Speed limit pot wire(s) broken or shorted
2. Broken speed limit pot
1,4
0 0000
Battery voltage too low
1. Battery voltage <17 volts
2. Bad connection at battery or controller
1,5
0 00000
Battery voltage too high
1. Battery voltage >36 volts
2. Vehicle operating with charger attached
3. Intermittent battery connection
2,1
00 0
Main contactor driver Off fault
Main contactor driver failed open
2,3
00 000
Main contactor fault
1. Main contactor welded or stuck open
2. Main contactor driver fault
3. Brake coil resistance too high
2,4
00 0000
Main contactor driver On fault
Main contactor driver failed closed
3,1
000 0
HPD fault present for >10 sec.
1. Misadjusted throttle
2. Broken throttle pot or throttle mechanism
3,2
000 00
Brake On fault
1. Electromagnetic brake driver shorted
2. Electromagnetic brake coil open
3,3
000 000
Pre-charge fault
1. Low battery voltage
2. KSI and throttle turned on at same time
3,4
000 0000
Brake Off fault
1. Electromagnetic brake driver open
2. Electromagnetic brake coil shorted
3,5
000 00000
HPD (High Pedal Disable) fault
1. Incorrect sequence of throttle and KSI,**
push, or inhibit inputs
2. Misadjusted throttle pot
4,1
0000 0
Current sense fault
1. Short in motor or in motor wiring
2. Controller failure *
4,2
0000 00
Motor voltage fault (hardware failsafe)
1. Motor voltage does not correspond to
throttle request
2. Short in motor or in motor wiring
3. Controller failure *
4,3
0000 000
EEPROM fault
EEPROM failure or fault
4,4
0000 0000
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 the connections, inspect system wiring, then retest.
**Note: A KSI (key switch Input) system problem is a specific HPD (high pedal disable) type operational
fault caused by the Operator pressing the Operator Presence Pedal before turning on the main key
switch. This can be cleared by releasing the Operator Presence Pedal, then cycling the key switch
OFF and ON.
