Kohler 13ERG troubleshooting: 30 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Kohler 13ERG — full specs, parts & maintenance.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| HB | High battery voltage warning | Engine starting battery voltage rises above 16 VDC for a 12 VDC system or above 30 VDC for a 24 VDC system for more than 2 seconds when the engine is not running. | Check the battery rating and condition. |
| LB | Low battery voltage warning | Engine starting battery voltage falls below 9.5 VDC for a 12 VDC system or below 16 VDC for a 24 VDC system for more than 2 seconds when the engine is not running. | Check the battery rating and condition. Charge or replace the battery. |
| Symptom | Cause | Remedy |
|---|---|---|
| Does not crank | Generator set master switch in the OFF position | Move the generator set master switch to the correct position (RUN or AUTO). |
| Crank but does not start | Controller fuse (F3) blown | Replace the blown controller fuse. If the fuse blows again, troubleshoot the controller. |
| Starts hard | Relay interface board fuse (F2) blown | Replace the blown relay interface board fuse. If the fuse blows again, troubleshoot the controller. |
| No or low output voltage | Auxiliary winding fuse (F1) blown | Replace the blown auxiliary winding fuse. If the fuse blows again, troubleshoot the controller. |
| Stops suddenly | Controller circuit breaker tripped | Reset the controller circuit breaker. |
| Lacks power | Controller master or start/stop switch inoperative | Replace the controller master or start/stop switch. |
| Overheats | Cooling System: Air openings clogged | Clean the air openings. |
| Fault shutdown | Reset the controller. | Section 2 |
| Starter/starter solenoid inoperative | Replace the starter or starter solenoid. Eng. S/M | |
| Faulty ground connection | Clean and retighten the connection. — | |
| Air cleaner/backfire flame arrestor clogged | Clean or replace the filter element. Section 2 | |
| Compression weak | Check the compression. Eng. S/M | |
| Engine overload | Reduce the electrical load. See the generator set installation manual for wattage specifications. I/M | |
| Exhaust system leak | Inspect the exhaust system. Replace the inoperative exhaust system components. Section 3, I/M | |
| Exhaust system not securely installed | Inspect the exhaust system. Tighten the loose exhaust system components. Section 3, I/M | |
| Overspeed shutdown | Reset the controller. If the overspeed fault occurs again, contact the distributor/dealer. Section 2 | |
| Valve clearance incorrect | Adjust the valves. Eng. S/M | |
| Vibration excessive | Tighten all loose hardware. — | |
| Ignition system inoperative (gas/gasoline only) | Check the ignition system (ignition module, spark plugs, spark plug wires, etc.). Eng. O/M | |
| AC output circuit breaker open | Reset the breaker and check for AC voltage at the generator side of the circuit breaker. — | |
| Overcrank shutdown | Reset the controller. If the overcrank fault occurs again, contact the distributor/dealer. — | |
| Transfer switch test switch in the OFF position | Move the transfer switch test switch to the AUTO position. ATS O/M | |
| Wiring, terminals, or pin in the exciter field open | Check for continuity. Gen. S/M, W/D | |
| Main field (rotor) inoperative (open or grounded) | Test and/or replace the rotor. Gen. S/M | |
| Stator inoperative (open or grounded) | Test and/or replace the stator. Gen. S/M | |
| Shutdown occurs when the governed frequency falls below 90% of the system’s frequency setpoint for more than 5 seconds. | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues. | |
| Shutdown occurs if the voltage falls below 80% of the voltage regulator setpoint for more than 10 seconds. | Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues. | |
| Controller error | Indicates a software or communication problem within the ADC 2100. | Contact an authorized distributor/dealer for service if problem continues. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Generator set master switch in the OFF position. See the table for the matching fixes.
Documented causes: Controller fuse (F3) blown. See the table for the matching fixes.
Documented causes: Relay interface board fuse (F2) blown. See the table for the matching fixes.