Kohler 30REZG troubleshooting: 10 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Kohler 30REZG — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| Osed moving parts | Keep hands, feet, hair, clothing, and test leads away from the belts and pulleys when the generator set is running. Replace guards, screens, and covers before operating the generator set. | |
| Unbalanced weight | Do not use lifting eyes. Lift the generator set using lifting bars inserted through the lifting holes on the skid. | |
| Hot coolant and steam | Before removing the pressure cap, stop the generator set and allow it to cool. Then loosen the pressure cap to relieve pressure. | |
| Hot engine and exhaust system | Do not work on the generator set until it cools. | |
| Servicing the exhaust system. Hot parts | Do not touch hot engine parts. | |
| Voltage reconnection | Affix a notice to the generator set after reconnecting the set to a voltage different from the voltage on the nameplate. Order voltage reconnection decal 246242 from an authorized service distributor/dealer. | |
| Parallel Operation | This product includes features intended to support operation in parallel with the utility grid, but these features have not been evaluated for compliance with specific utility interconnection protection standards or requirements. | |
| Canadian installations only | For standby service connect the output of the generator set to a suitably rated transfer switch in accordance with Canadian Electrical Code, Part 1. | |
| Low Coolant Temperature (LCT) fault alarms occur even when a block heater is installed and properly functioning. | The LCT sender was installed in the incorrect location on the unit. In this case, the sender was installed in a tee fitting on the return line from the engine block to the block heater. The correct LCT location is in the thermostat housing. | |
| The LCT sender/switch at the tee of the return line between the engine block and block heater has two terminals, indicating it is an incorrect sender/switch. | Order LCT sender GM39458. Go to step 1.3. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: The LCT sender was installed in the incorrect location on the unit. In this case, the sender was installed in a tee fitting on the return line from the engine block to the block heater. The correct LCT location is in the thermostat housing.. See the table for the matching fixes.