Section 5 - Troubleshooting; Troubleshooting Guide - Generac Power Systems Automatic Standby Generators 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 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.
Cause
1. Fuse blown.
2. Loose, corroded or defective
battery cables.
3. Defective starter contactor. (8 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. Fouled spark plug(s).
5. Valve lash out of adjustment.
6. Choke not operating.
1. Air cleaner plugged
or damaged.
2. Fouled spark plug(s).
3. Fuel pressure incorrect.
4. Fuel selector in wrong position.
5. Choke remains closed.
1. Defective switch.
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. Improper type or viscosity of oil.
3. Damaged gasket, seal or hose.
4. Engine breather defective.
*Contact the nearest Authorized Dealer for assistance.
Section 5 — Troubleshooting
Air-cooled Generators
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.
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. 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.
4. Move selector to correct position.
5. 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. See "Engine Oil Recommendations".
3. Check for oil leaks.
4. *
29