Troubleshooting.16 - Generac Power Systems Q-55G Series Owner's Manual

TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE(S)
REMEDY
Engine won't crank 1. 15 amp fuse blown.
2. Loose, corroded or defective battery
cable{s).
3. Battery is discharged or defective.
4. Defective starter contactor.
5. Defective starter motor.
6. Defective control relay (CR1).
1. Replace blown fuse.
2. Tighten, clean or replace, as
necessaiy.
3. Recharge or replace battery.
4. Replace starter contactor.
5. Replace starter motor.
6. Replace control relay.
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. Defective control relay (CR2).
8. Engine spark plugs defective.
9. Bad ignition magneto on engine.
10. Bad carburetor.
11. 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. Replace bad relay (CR2).
8. Clean, regap or replace as needed.
9. Replace if defective.
10. Adjust, repair or replace.
11. 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 control relay (CR1).
3. Bad low oil pressure switch.
4. Bad control relay (CR2).
5. Water in fuel.
1 Add oil as needed.
2. Replace if bad (CR1).
3. Replace, if bad.
4. Replace bad relay (CR2).
5. Drain fuel tank and refill.
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 authorized service facility.
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