SEVCON - motor controller
MICROMOS & SC1000 error codes
| Green LED | Description |
| OFF | No power-up |
| 2 FLASHES | Wrong start procedure - invalid sequence |
| 3 FLASHES | Motor output short-circuit to B- |
| 4 FLASHES | Motor output short-circuit to B+ |
| 5 FLASHES | Motor contactor circuit open |
| 6 FLASHES | Accelerator fault |
| 7 FLASHES | Battery voltage fault |
| 8 FLASHES | Thermal cutback |
| 9 FLASHES | Battery voltage below 18V |
SEVCON - motor controller
MOS90 error codes
| Green LED | Description |
| OFF | No power-up or controller internal error |
| 2 FLASHES | Wrong start procedure - invalid sequence |
| 3 FLASHES | Motor output short-circuit to B- or bypass contactor welded |
| 4 FLASHES | Direction contactor welded |
| 5 FLASHES | Motor contactor circuit open or direction contactor not close |
| 6 FLASHES | Accelerator fault |
| 7 FLASHES | Battery voltage fault |
| 8 FLASHES | Thermal cutback |
SEVCON - motor controller
MILLIPAK 4QPM error codes
| Green LED | Description |
| ON | No fault |
| OFF | Controller internal error or no keyswitch voltage |
| 1 FLASH | Personality out of range |
| 2 FLASHES | Illegal start condition |
| 3 FLASHES | Motor MOSFET short circuit |
| 4 FLASHES | Contactor fault or motor open circuit |
| 6 FLASHES | Accelerator wire off fault |
| 7 FLASHES | Too low or too high battery voltage or BDI cutout operating |
| 8 FLASHES | Over temperature or timed cutback |
| 10 FLASHES | Power-up Autozero function has not yet been completed |
SEVCON - motor controller
POWERPAK error codes
| Green LED | Description |
| ON | No fault |
| OFF | No power-up, internal fault |
| 1 FLASH | Personality out of range |
| 2 FLASHES | Invalid start procedure - sequence error |
| 3 FLASHES | Motor or mosfet short circuit |
| 4 FLASHES | Motor open circuit or contactor fault |
| 6 FLASHES | Accelerator fault, Speed probe fault |
| 7 FLASHES | Battery voltage fault, BDI cutout |
| 8 FLASHES | Thermal cutback |
| 9 FLASHES | Contactor coil open circuit |
| 12 FLASHES | CAN-bus fault |
SEVCON - motor controller
SC2000 error codes
| Green LED | Description |
| ON | No fault |
| OFF | No power-up, internal fault |
| 1 FLASH | Personality out of range, CRC fault |
| 2 FLASHES | Invalid start procedure - sequence error, steer switch sequence, two directions together |
| 3 FLASHES | Mosfet short circuit or bypass contactor welded |
| 4 FLASHES | Contactor circuit open or shorted |
| 6 FLASHES | Potentiometer fault (accelerator, speed probe, steer pot) |
| 7 FLASHES | Battery voltage fault, BDI cutout |
| 8 FLASHES | Thermal cutback, heatsink too hot, over 75 deg.C |
| 9 FLASHES | Contactor coil short circuit |