The APM802 is a generator-set controller. It is used on generator sets from Kohler and SDMO, including the APM802, GMKD1350, GMKD1750 and GMKD700.
Used across brands: Kohler, SDMO
| 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. |
| M3.212 | APM INTERNAL power BATTERY WARNING |
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.