Section 5 - Troubleshooting - Generac Power Systems 004373-3, 004626-2 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 engine starts, but then
shuts down.
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.
*Contact your nearest Generac/Guardian Authorized Dealer for assistance.
20 Generac ® Power Systems, Inc.
Section 5 — Troubleshooting
Guardian Liquid-cooled 40 kW Generator
CAUSE
1. Fuse blown
2. Loose, corroded or defective
battery cables
3. Defective starter contactor
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. Dirty/Blocked air filter
1. Air cleaner
plugged or damaged
2. Defective spark plug(s)
3. Dirty/Blocked air filter
1. Engine oil level low
2. Defective low oil
pressure switch
3. Defective high temperature
switch
4. Defective control board
5. Low coolant level
1. Defective switch
2. Defective control board
1. Generator main line circuit
breaker open
2. Generator internal failure
1. Generator main line circuit
breaker open
2. Defective transfer switch coil
3. Defective transfer relay
4. Transfer relay circuit open
5. Defective control logic board
CORRECTION
1. Replace fuse.
2. Tighten, clean or replace
as necessary.
3. *
4. *
5. Charge or replace battery.
1. Replenish fuel.
2. *
3. *
4. Clean, re-gap or replace plug(s).
5. Clean or replace as required.
1. Check, clean or replace air cleaner.
2. Clean, re-gap or replace plug(s).
3. Clean or replace as required.
1. Check oil and add oil as needed.
2. *
3. *
4. *
5. Check coolant level, repair leaks
and refill.
1. *
2. *
1. Reset circuit breaker
to ON (or closed).
2. *
1. Reset circuit breaker
to ON (or closed).
2. *
3. *
4. *
5. *