Troubleshooting for inverter IGBT faults (3-51-1, 3-52-0)
3-51-1 or 3-52-0 fault codes indicate that there is a phase or short circuit problem with the inverter module.
Fault codes and fault LEDs
| Fault code | Fault LEDs | Torch LED | Description | Stops the system from operating? |
|---|---|---|---|---|
| 3-51-1 |
ON |
Red |
The inverter IGBT is starting in phase instead of 180° out of phase. | Yes. |
| 3-52-0 | A short circuit caused high-current distortion in the inverter IGBT. This is sometimes referred to as a shoot-through. | Yes. |
Corrective action for 3-51-1 and 3-52-0 faults
- Replace the power Printed Circuit Board (PCB) if necessary.