Kohler PRO 6.4 troubleshooting: 8 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Kohler PRO 6.4 — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| No AC output | Circuit breaker in OFF position. | Switch circuit breaker to ON. |
| Engine not operating at rated RPM | Adjust engine running at normal operating temperature to 3750 ± 100 RPM. | |
| Circuit breaker or receptacles faulty | Test for voltage at circuit breaker and receptacles. | |
| Stator is faulty | Test for voltage and resistance. | |
| Brushes are faulty | Test for resistance between brushes and slip ring. | |
| AVR is faulty | Test for voltage. Replace AVR with a new AVR. Start engine and adjust trimmer on back of AVR. Test terminal voltage. Voltage should be between 95-135V. | |
| Engine Not Starting/Running Abnormally | Load connected to generating set during start-up Start and Stop control ON or OFF Oil level too low Unsuitable fuel level too low Fuel valve closed Clogged fuel filter Clogged fuel strainer Clogged air filter Faulty spark plug Fuel supply blocked or leaking Faulty starter battery Blocked ventilation inlets Circuit protectors not actuated Faulty appliance supply cord Faulty electrical sockets Faulty alternator Device connected or faulty cord Overload | |
| No Electric Current | Tripping of Circuit Breaker |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Circuit breaker in OFF position.. See the table for the matching fixes.
Documented causes: Load connected to generating set during start-up Start and Stop control ON or OFF Oil level too low Unsuitable fuel level too low Fuel valve closed Clogged fuel filter Clogged fuel strainer Clogged air filter Faulty spark plug Fuel supply blocked or leaking Faulty starter battery Blocked ventilation inlets Circuit protectors not actuated Faulty appliance supply cord Faulty electrical sockets Faulty alternator Device connected or faulty cord Overload. See the table for the matching fixes.
Documented causes: Tripping of Circuit Breaker. See the table for the matching fixes.