The L401 is a generator-set controller. It is used on generator sets from Isuzu, including the 4LE2TAGV-03.
| Code | Meaning | Remedy |
|---|---|---|
| 0 | In case of an emergency, always press the emergency stop switch located on the side of the unit to stop the engine immediately. The Stop/Reset (O) button may delay the engine shutdown if stop faults exist. | To prevent damage to the generator and connected equipment, remove all loads from the generator by opening all circuit breakers (turn to the OFF (O) position) before pressing the Stop/Reset (O) button. |
| Symptom | Cause |
|---|---|
| Ured current has fallen below the configured trip level | This is used to detect lamp failure. |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.