The APM804 is a generator-set controller. It is used on generator sets from Kohler, including the APM804 and KD700-KD4000.
| Code | Meaning | Remedy |
|---|---|---|
| 503 | Engine Over Speed | Reduce engine load or check for mechanical issues. |
| 601 | Generator Over Temperature | Cool down generator and monitor temperature. |
| Symptom | Remedy |
|---|---|
| Battery acid cleanup. | Add 500 g (1 lb.) of bicarbonate of soda (baking soda) to a container with 4 L (1 gal.) of water and mix the neutralizing solution. Pour the neutralizing solution on the spilled battery acid and continue to add the neutralizing solution to the spilled battery acid until all evidence of a chemical reaction (foaming) has ceased. Flush the resulting liquid with water and dry the area. |
| Battery acid splashes in the eyes or on the skin. | Immediately flush the affected area for 15 minutes with large quantities of clean water. Seek immediate medical aid in the case of eye contact. |
| The negative (-) lead last when reconnecting the battery. | Follow these precautions to prevent the starting of the generator set by the remote start/stop switch. |
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.