Section 5 - Troubleshooting; Troubleshooting Guide - Generac Power Systems 7kW Installation And Owner's Manual

5.1

TROUBLESHOOTING GUIDE

Problem
The engine will not crank.
The engine cranks but
will not start.
The engine starts hard
and runs rough.
The AUTO/OFF/MANUAL switch 1. Defective switch.
is set to OFF , but the engine
continues to run.
There is no AC output from
the generator.
There is no transfer to
standby after utility
source failure.
Unit consumes large
amounts of oil.
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Section 5 — Troubleshooting
Air-cooled Generators
Cause
1. Fuse blown.
2. Loose, corroded or defective
battery cables.
3. Defective starter contactor. (7 kW)
4. Defective starter motor.
5. Dead Battery.
1. Out of fuel.
2. Defective fuel solenoid (FS).
3. Open #14 wire from
engine control board.
4. Defective spark plug(s).
5. Valve lash out of adjustment.
6. Choke not operating.
1. Air cleaner plugged
or damaged.
2. Defective spark plug(s).
3. Fuel regulator not set.
4. Fuel pressure incorrect.
5. Fuel selector in wrong position.
6. Choke remains closed.
2. AUTO/OFF/MANUAL switch
wired incorrectly.
3. Defective control board.
1. Main line circuit breaker is in
the OFF (or OPEN) position.
2. Generator internal failure.
1. Defective transfer switch coil.
2. Defective transfer relay.
3. Transfer relay circuit open.
4. Defective control logic board.
1. Engine over filled with oil.
2. Engine breather defective.
3. Improper type or viscosity of oil.
4. Damaged gasket, seal or hose.
*Contact the nearest Authorized Dealer for assistance.
Correction
1. Correct short circuit condition,
replace 15A fuse in generator
control panel.
2. Tighten, clean or replace
as necessary.
3. *
4. *
5. Charge or replace battery.
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.
1. Check, replace air cleaner.
2. Clean, re-gap or replace plug(s).
3. Set Fuel Regulator.
4. Confirm fuel pressure to regulator
is 10-12" water column (0.36-0.43
psi) for LP , and 5-7" water column
(0.18-0.25 psi) for natural gas.
5. Move selector to correct position.
6. Verify choke plate moves freely.
1. *
2. *
3. *
1. Reset circuit breaker
to ON (or CLOSED).
2. *
1. *
2. *
3. *
4. *
1. Adjust oil to proper level.
2. *
3. See "Engine Oil Recommendations".
4. Check for oil leaks.