Cummins/Onan DQKAB troubleshooting: 8 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Cummins/Onan DQKAB — full specs, parts & maintenance.
All Cummins/Onan fault codes →
| Code | Meaning |
|---|---|
| 81u | Under frequency shutdown |
| 32 | Reverse power shutdown |
| Symptom | Remedy |
|---|---|
| Battle short mode | If enabled and the battle short switch is active, some shutdown faults will be bypassed. However, emergency stop shutdowns and other critical faults are not bypassed. |
| Derate | The Derate function reduces output power of the genset in response to a fault condition. In utility parallel mode, it actively reduces power by lowering the base load kW to the derated target kW. |
| Configurable alarm and status inputs | The control accepts up to four configurable alarm or status inputs. The control is programmable for warning, derate, shutdown, shutdown with cooldown or status indication and for labeling the input. |
| Emergency stop | Annunciated whenever either emergency stop signal is received from an external switch. |
| General prime mover protection | Low and high battery voltage warning - Indicates status of the battery charging system (failure) by continuously monitoring battery voltage. Weak battery warning - The control system will test the battery each time the genset is signaled to start and indicate a warning if the battery indicates impending failure. Low coolant level warning – Can be set up to be a warning or shutdown. |
| General prime mover protection - Low and high battery voltage warning | Indicates status of battery charging system (failure) by continuously monitoring battery voltage. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.