Generac q-70g recreational vehicle generator – Generac Power Systems 0784-1 User Manual
Page 18
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TROUBLESHOOTING
Section 4 - Troubleshooting
Generac Q-70G Recreational Vehicle Generator
4.1 TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
CORRECTION
The engine will not crank.
1 .
Fuse blown
1 .
Replace fuse.
2.
Loose, corroded or defective
2.
Tighten, clean or replace
battery cables
as necessary.
3.
Defective engine Start/Stop
switch
3.
Replace Start/Stop switch.
4.
Defective starter contactor
4.
Replace contactor.
5.
Defective starter motor
5.
Replace starter motor.
6.
Low or defective battery
6.
Charge or replace battery.
The engine cranks but
1.
Out of fuel
1.
Replenish fuel.
will not start.
2.
Defective fuel pump
2.
Replace fuel pump.
3.
Open #14 wire from
3,
Check connections and.
engine control board
insulation of #14 wires.
4.
Flooded engine
4.
Wait 5-10 minutes before trying.
5.
Defective spark plug(s)
5.
Clean, re-gap or replace plug(s).
6.
Fuel line shut-off closed
6.
Open fuel line shut-off.
7.
Plugged fuel filter
7.
Clean or replace fuel filter.
The engine starts hard
1.
Air cleaner
1.
Check, clean or replace air cleaner.
and runs rough.
2.
plugged or damaged
Defective spark plug(s)
2.
Clean, re-gap or replace plug(s).
The engine starts, but shuts
1.
Engine oil level low
1.
Check oil and add oil as needed.
down when the Start/Stop
2.
Defective low oil
2.
Replace pressure switch.
switch is released.
3.
pressure switch
Defective high temperature
switch
3.
Replace temperature switch.
4.
Defective engine control board
4.
Replace control board.
5.
Overheated engine
5.
Check that the airflow
openings are adequate.
The Start/Stop switch is
1.
Defective Start/Stop switch
1.
Replace switch.
set to Stop, but the engine
2.
Open/Disconnected #18 wire
2.
Reconnect or close wire.
continues to run.
3.
between Start/Stop switch
and engine control board
Open/Dlsconnected #0 wire
between Start/Stop switch
and engine control board
3.
Reconnect or close wire.
4.
Defective engine control board
4.
Replace control board.
There is no AC output from
1.
Main line circuit breaker open
1.
Reset circuit breaker
the generator.
2.
Fault with vehicle circuit
breaker and/or fuses
2.
to ON (or closed).
Reset and replace if necessary.
3.
Transfer switch set to NORMAL
3.
Set switch to GENERATOR.
4.
Start switch not held long
4.
Stop, then restart the engine
enough to flash the field
(Hold Start .switch for at least
2 seconds).
5.
Generator internal failure
5.
Contact a Generac Authorized
Service Dealer.
1 6 Generac® Power Systems, Inc.