19Service Manual – SC900 20 - Wheel System, Traction
Status Led Fault Codes
Code Name / Explanation Possible Cause
2,3
MAIN CONT FLTS
Main contactor fault
• Main contactor welded or stuck open
• Main contactor driver fault
• Brake coil resistance too high
2,4
MAIN ON FAULT
Main contactor driver On fault
• Main contactor driver failed closed
3,1
PROC/WIRING FAULT
Fault present for >10 sec.
• Misadjusted throttle
• Broken throttle pot or throttle mechanism
• The keyswitch must be cycled before this fault can clear
3,2
BRAKE ON FAULT
Brake On fault
• Electromagnetic brake driver shorted
• Electromagnetic brake coil open
3,3
PRECHARGE FAULT
Precharge fault
• Low battery voltage
• Throttle engaged when KSI (keyswitch input) turned on
3,4
BRAKE OFF FAULT
Brake Off fault
• Electromagnetic brake driver open
• Electromagnetic brake coil shorted
3,5
HPD
HPD (High Pedal Disable)
• Improper sequence of throttle and KSI (keyswitch input)
• Misadjusted throttle pot
4,1
CURRENT SENSE FAULT
Current sense fault
• Short in motor or in motor wiring
• Controller failure
• The keyswitch must be cycled before this fault can clear
4,2
HW FAILSAFE
HW Failsafe
(hardware failsafe)
• Motor voltage does not correspond to throttle request
• Short in motor or in motor wiring
• Controller failure
• The keyswitch must be cycled before this fault can clear
4,3
EEPROM FAULT
EEPROM fault
• EEPROM failure or fault
• The keyswitch must be cycled before this fault can clear
4,4
POWER SECTION FAULT
Power section fault
• EEPROM failure or fault
• Short in motor or in motor wiring
• Controller failure
•
The keyswitch must be cycled before this fault can clear
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