The Decision-Maker r 3500 is a generator-set controller. It is used on generator sets from Kohler, including the 120REOZT4, 145REOZT4, 175REOZT4 and 45 REOZT4.
| Code | Meaning | Remedy |
|---|---|---|
| 32 | High Coolant Temperature | |
| 32A | Emergency Stop | Reset the emergency stop switch. |
| 40 | Pre High Coolant Temp. | |
| 41 | Pre Low Oil Pressure | Check and adjust oil level or replace oil pump. |
| 48 | Emergency Stop | |
| 62 | Low Battery Volts | |
| 63 | Low Fuel | Refuel the generator set. |
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.