Troubleshooting – Generac Power Systems 9344-2 User Manual
Page 15
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TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSES
REMEDY
Engine won’t crank
1. 10 amp circuit breaker tripped.
2. 14 amp fuse blown.
3. Loose corroded or defective
battery cables.
4. Defective engine Start/Stop switch.
5. Defective starter contactor.
6. Defective starter motor.
7. Low or discharged battery.
1. Reset circuit breaker.
2. Replace fuse.
3. Tighten clean or replace as
necessary.
4. Replace Start/Stop switch.
5. Replace contactor.
6. Replace starter motor.
7. Charge or replace battery.
Engine cranks but won’t start.
1. Vehicle fuel shutoff valve is closed.
2. Out of fuel.
3. Fuel solenoid (FS) is defective.
4. Fuel pump (FP) is defective.
5. Open Wire #14 from Engine Control C.B.
6. Clogged fuel filter or fuel line.
7. Engine mechanical parts failure.
1. Open valve.
2. Replenish fuel tank.
3. Replace solenoid.
4. Repair or replace fuel pump.
5. Reconnect wire.
6. Replace if clogged.
7. Repair or replace parts.
Engine starts hard, runs rough.
1. Flame arrestor (air cleaner) plugged or
damaged.
2. Defective fuel pump.
3. Plugged fuel filter or fuel line.
4. Water in fuel.
5. Improper pre-heat.
1. Clean or replace as needed.
2. Replace or repair fuel pump.
3. Replace filter; unclog fuel line.
4. Drain tank and refill.
5. Pre-heat unit.
Engine starts, shuts down when
Start/Stop switch is released.
1. Engine oil level is low.
2. Engine is overheated.
3. Defective low oil pressure switch.
4. Defective coolant temperature switch.
5. Defective engine controller circuit board.
6. Low coolant level.
1. Check oil and add oil as needed.
2. Check cooling system for leaks.
3. Replace switch.
4. Replace switch.
5. Replace circuit board.
6. Repair leak and add antifreeze
mixture as needed.
Start/Stop Switch at STOP,
engine continues to run.
1. Defective Start/Stop switch.
2. Open/disconnected wire #18 between
Start/Stop switch & engine controller C.B.
3. Open/disconnected wire #0 between
Start/Stop switch & engine controller C.B.
4. Defective Engine Controller circuit board.
1. Replace switch.
2. Reconnect/close wire.
3. Reconnect/close wire.
4. Replace board.
No AC output from generator.
1. Check main circuit breaker.
2. Check vehicle circuit breaker & fuses.
3. Generator internal failure.
1. Reset to ON or CLOSED.
2. Reset and replace, if necessary.
4. Take generator to authorized
Generac service facility.
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