Troubleshooting - Generac Power Systems GP Series Owner's Manual

Troubleshooting

PROBLEM
Engine is running, but
AC output is not
available.
Engine runs well at
no-load, but bogs when
load is applied.
Engine will not start; or
starts and runs rough.
Engine shuts down
during operation.
Engine lacks power.
Engine surges or
stumbles.
20
CAUSE
1. Circuit breaker OPEN.
2. Poor connection or defective
cord set.
3. Connected device is bad.
4. Fault in generator.
5. GFCI receptacle is OPEN (if
equipped).
1. Short circuit in a connected
load.
2. Generator is overloaded.
3. Engine speed is too slow.
4. Shorted generator circuit.
5. Clogged spark arrestor.
1. Fuel shut-off is OFF.
2. Dirty air filter.
3. Out of fuel.
4. Stale fuel.
5. Spark plug wire not connected
to spark plug.
6. Bad spark plug.
7. Water in fuel.
8. Overchoking.
9. Low oil level.
10. Excessive rich fuel mixture.
11. Intake valve stuck open or
closed.
12. Engine lost compression.
1. Out of fuel.
2. Low oil level.
3. Fault in engine.
4. COsense shut-off due to accu-
mulating carbon monoxide if a
red light blinks on the side
panel badge.
5. COsense shut-off due to a
system fault if a yellow light
blinks on the side panel
badge.
1. Generator is overloaded.
2. Dirty air filter.
3. Engine needs to be serviced.
4. Clogged spark arrestor.
1. Choke is opened too soon.
2. Carburetor is running too rich
or too lean.
CORRECTION
1. Reset circuit breaker.
2. Check and repair.
3. Connect another device that is
in good condition.
4. Contact IASD.
5. Correct ground fault and press
reset button on GFCI recepta-
cle (if equipped).
1. Disconnect shorted electrical
load.
2. Reduce load (see
erator Limits
3. Contact IASD.
4. Contact IASD.
5. Clean spark arrestor screen.
1. Turn fuel shut-off ON.
2. Clean or replace air filter.
3. Fill fuel tank.
4. Drain fuel tank and fill with
fresh fuel.
5. Connect wire to spark plug.
6. Replace spark plug.
7. Drain fuel tank and fill with
fresh fuel.
8. Set choke to no choke posi-
tion.
9. Fill crankcase to correct level.
10. Contact IASD.
11. Contact IASD.
12. Contact IASD.
1. Fill fuel tank.
2. Fill crankcase to correct level.
3. Contact IASD.
4. Follow all safety instructions
and relocate generator to an
open area outside, far away
from windows, doors and
vents.
5. Start to confirm yellow light
blinks when/if generator shuts-
off. If COsense continues to
fault and shut-off, contact
IASD.
1. Reduce load (see
erator Limits
2. Clean or replace air filter.
3. Contact IASD.
4. Clean spark arrestor screen.
1. Set choke to halfway position
until engine runs smoothly.
2. Contact IASD.
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