Generac Power Systems 4270-0 - Manual (Page 39)

Appendix 1 - Troubleshooting
QUIETPACT™ 75D Recreational Vehicle Generator
TROUBLESHOOTING
TROUBLESHOOTING GUIDE
PROBLEM CAUSE CORRECTION
The engine will not crank. 1. System control fuse blown
2. Loose corroded or defective
battery cables
3. Defective engine Start/Stop
switch
4. Defective starter contactor
5. Defective starter motor
6. Low or defective battery
7. Defective engine control board
1. Replace fuse.
2. Tighten, clean or replace
as necessary.
3. Replace Star VS top switch.
4. Replace contactor.
5. Replace starter motor.
6. Charge or replace battery.
7. Replace control board.
The engine cranks but
will not start. 1. Vehicle fuel shutoff valve closed
2. Out of fuel
3. Defective fuel solenoid (FS)
4. Defective fuel pump (FP)
5. Open #14 wire from
engine control board
6. Plugged fuel filter or fuel line
7. Engine mechanical parts failure
8. Defective engine control board
1. Open valve, if so equipped.
2. Replenish fuel.
3. Replace solenoid.
4. Repair or replace fuel pump.
5. Check connections and.
insulation of #14 wires.
6. Clean or replace fuel filter or line.
7. Repair or replace parts.
8. Replace control board.
The engine starts hard
and runs rough.
1. Air filter plugged
or damaged
2. Defective fuel pump (FP)
3. Plugged fuel filter or fuel line
4. Water in fuel
5. Improper preheat
1. Check, clean or replace as needed.
2. Repair or replace fuel pump.
3. Clean or replace fuel filter or line.
4. Drain fuel system and refill.
5. Preheat unit.
The engine starts, but shuts
down when the Start/Stop
switch is released. 1. Engine oil level low
2. Overheated engine
3. Defective low oil
pressure switch
4. Defective high coolant
temperature switch
5. Defective engine control board
1. Check oil and add oil as needed.
2. Check cooling system for leaks.
3. Replace pressure switch.
4. Replace temperature switch.
5. Replace control board.
The Start/Stop switch is
set to Stop, but the engine
continues to run.
1. Defective Start/Stop switch
2. Open/Disconnected #18 wire
between Start/Stop switch
and engine control board
3. Open/Disconnected #0 wire
between Start/Stop switch
and engine control board
4. Defective engine control board
1. Replace switch.
2. Reconnect or close wire.
3. Reconnect or close wire.
4. Replace control board.
There is no AC output from
the generator. 1. Main line circuit breaker open
2. Fault with vehicle circuit
breaker and/or fuses
3. Generator internal failure
1. Reset line breaker
to ON (or closed).
2. Reset and replace if necessary.
3. Contact a Generac Authorized
Service Dealer.
Generao* Power Systems, Inc. 37