Section 5 - Troubleshooting; Troubleshooting Guide - Generac Power Systems 8KW Owner's Manual

Section 5 - Troubleshooting
Air-cooled Generators
TROUBLESHOOTING
5.1 TROUBLESHOOTING GUIDE
Problem
The engine will not crank.
Cause
1. Fuse blown.
2. Loose, corroded or defective
battery cables.
3. Defective starter contactor. (8 kW)
4. Defective starter motor.
5. Dead Battery.
Correction
1. Correct short circuit condition,
replace 7.5A fuse in generator
control panel.
2. Tighten, clean or replace
as necessary.
3. *
4.
5.
Charge or replace battery.
The engine cranks but
will not start.
1. Out of fuel.
2. Defective fuel solenoid (FS).
3. Open #14 wire from
engine control board.
4. Fouled spark plug(s).
5. Valve lash out of adjustment.
6. Choke not operating.
1. Replenish fuel/Turn on fuel valve.
2. *
3. *
4. Clean, re-gap or replace plug(s).
5. Reset valve lash.
6. Verify choke plate moves freely.
The engine starts hard
and runs rough.
1. Air cleaner plug__ged
or damaged.
2. Fouled spark plug(s).
3. Fuel pressure incorrect.
4. Fuel selector in wrong position.
5. Choke remains closed.
1. Check, replace air cleaner.
2. Clean, re-gap or replace plug(s).
3. Confirm fuel pressure to regulator
is 10-12" water column (0.36-0.43
psi) for LR and 5-7" water column
(0.18-0.25 psi) for natural gas.
4. Move selector to correct position.
5. Verify choke plate moves freely.
The AUTO/OFF/MANUAL
switch is set to OFE but
the engine continues
to run.
1. Defective switch.
2. AUTO/OFF/MANUAL switch
wired incorrectly.
3. Defective control board.
1.
2.
3.
There is no AC output
from the generator.
1. Main line circuit breaker is in
the OFF (or OPEN) position.
2. Generator internal failure.
1. Reset circuit breaker
to ON (or CLOSED).
2. *
There is no transfer to
standby after utility
source failure.
1. Defective transfer switch coil.
2. Defective transfer relay.
3. Transfer relay circuit open.
4. Defective control logic board.
1.
2.
3.
4.
Unit consumes large
amounts of oil.
1. Engine over filled with oil.
2. Improper type or viscosity of oil.
3. Damaged gasket, seal or hose.
4. Engine breather defective.
1. Adjust oil to proper level.
2. See "Engine Oil Recommendations".
3. Check for oil leaks.
4. *
*Contact the nearest Dealer for assistance.
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