The Engine P.C.B. is a generator-set controller. It is used on generator sets from Generac, including the PRIMEPACT 70.
| Symptom | Cause | Remedy |
|---|---|---|
| Engine cranks, won't start. | 1. Out of fuel. 2. Fuel shutoff valve is closed. 3. Fuel pump not operating. 4. Automatic choke not operating properly. 5. Engine is flooded. 6. Fuel filter is clogged. 7. Engine spark plugs defective. 8. Bad ignition magneto on engine. 9. Bad carburetor. 10. Dirty air cleaner. | 1. Refill fuel tank. 2. Open fuel shutoff valve(s). 3. Repair or replace pump. 4. Repair, replace or adjust. 5. Wait 5-10 minutes: try again. 6. Replace filter if clogged. 7. Clean, regap or replace as needed. 8. Replace if defective. 9. Adjust, repair or replace. 10. Clean or replace as needed. |
| Engine starts hard, runs rough. | 1. Dirty engine air cleaner. 2. Automatic choke is sticking. 3. Defective spark plugs. 4. Defective ignition magneto. | 1. Clean or replace as needed. 2. Free choke linkage as needed. 3. Clean, regap or replace. 4. Replace it if defective. |
| Engine starts, then shuts down. | 1. Engine oil level is low. 2. Bad low air pressure switch. 3. Defective high temp switch. 4. Water in fuel. | 1. Add oil as needed. 2. Replace, if bad. 3. Replace, if bad. 4. Drain fuel tank and refill. |
| Engine won't crank. | 1. 15 amp fuse blown. 2. Loose, or corroded or defective battery cable(s). 3. Battery is discharged or defective. 4. Defective starter contactor. 5. Defective starter motor. 6. Defective Start/Stop switch. | 1. Replace blown fuse. 2. Tighten, clean or replace, as necessary. 3. Recharge or replace battery. 4. Replace starter contactor. 5. Replace starter motor. 6. Replace switch. |
| No AC output voltage. | 1. Main breaker(s) open. 2. Transfer switch (if so equipped) is set to wrong position. 3. Failure in vehicle electrical system. 4. Generator component failure. | 1. Close main breaker(s). 2. Reset transfer switch. 3. See vehicle manual. 4. Contact an authorized service facility. |
| The carburetor choke valve only operates when the engine is cranking and stops cycling once the engine starts. | This behavior is normal as the choke system adjusts according to ambient temperatures and an internal element opens it after the engine starts. |
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.