The DC-RET Digital is a generator-set controller. It is used on generator sets from Kohler, including the 12RES and 18RESL.
| Code | Meaning |
|---|---|
| High engine temperature | Engine runtime, hours |
| Low battery voltage | Crank cycle status |
| Overcrank | Remote two-wire start/stop capability |
| Overfrequency | Digital voltage regulation: ±1.5% RMS no-load to full-load |
| Overspeed | Automatic start for programmed cranking cycle |
| Underfrequency | Master control switch mounted on the junction box: Run/Off-Reset/Auto |
| Undervoltage | Upgradeable application software |
| Symptom | Cause | Remedy |
|---|---|---|
| Accidental starting | Disconnect the battery cables before working on the generator set. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery. | |
| Battery short circuit | Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery. Never connect the negative (--) battery cable to the positive (+) connection terminal of the starter solenoid. Do not test the battery condition by shorting the terminals together. | |
| Severe electrical equipment damage. | Welding the generator set. | Never weld components of the generator set without first disconnecting the battery, controller wiring harness, and engine electronic control module (ECM). |
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.