The Solid-state engine circuit board is a generator-set controller. It is used on generator sets from Generac, including the Guardian Liquid-cooled 40 kW Generator.
| Symptom | Cause | Remedy |
|---|---|---|
| The engine cranks but will not start. | 1. Out of fuel 2. Defective fuel solenoid (FS) 3. Open #14 wire from engine control board 4. Defective spark plug(s) 5. Dirty/Blocked air filter | 1. Replenish fuel. 2. * 3. * 4. Clean, re-gap or replace plug(s). 5. Clean or replace as required. |
| The engine starts hard and runs rough. | 1. Air cleaner plugged or damaged 2. Defective spark plug(s) 3. Dirty/Blocked air filter | 1. Check, clean or replace air cleaner. 2. Clean, re-gap or replace plug(s). 3. Clean or replace as required. |
| The engine starts, but then shuts down. | 1. Engine oil level low 2. Defective low oil pressure switch 3. Defective high temperature switch 4. Defective control board 5. Low coolant | 1. Check oil and add oil as needed. 2. * 3. * 4. * 5. * |
| The engine will not crank. | 1. Fuse blown 2. Loose, corroded or defective battery cables 3. Defective starter contactor 4. Defective starter motor 5. Dead Battery | 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace defective starter contactor. 4. Replace defective starter motor. 5. Charge or replace battery. |
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.