Section 5: Troubleshooting / Quick Reference Guide; General Troubleshooting - Generac Power Systems 20 kW Synergy Owner's Manual

Section 5: Troubleshooting / Quick Reference Guide

General Troubleshooting

Problem
Engine will not crank.
Engine cranks but will
not start.
Engine starts hard and
runs rough.
Generator is set to OFF,
but the engine contin-
ues to run.
No AC output from gen-
erator.
No transfer to standby
after utility source fail-
ure.
Unit consumes large
amounts of oil.
* Contact an IASD for assistance.
Owner's Manual for 60 Hz Synergy™ Generators
Table 5-1. General Troubleshooting
Cause
1. Blown fuse.
2. Loose, corroded, or defective battery
cables.
3. Defective starter contact.
4. Defective starter motor.
5. Discharged battery.
1. No fuel.
2. Defective fuel solenoid (FS).
3. Open Wire 14 from controller.
4. Defective spark plug(s).
5. Valve clearance out of adjustment.
1. Air cleaner plugged or damaged.
2. Defective spark plug(s).
3. Incorrect fuel pressure.
4. Fuel selector in wrong position.
5. Valve(s) out of adjustment.
6. Internal engine issue.
1. Controller wired incorrectly.
2. Defective control board.
1. Main line circuit breaker (MLCB) (genera-
tor disconnect) is OFF (OPEN).
2. Generator internal failure.
3. Engine may be warming up. Refer to
Smart Start
.
1. MLCB (generator disconnect) is OFF
(OPEN).
2. Defective transfer switch coil.
3. Defective transfer relay.
4. Transfer relay circuit open.
5. Defective control logic board.
6. Engine may be warming up. Refer to
Smart Start
.
1. Excessive engine oil.
2. Defective engine breather.
3. Improper type or viscosity of oil.
4. Damaged gasket, seal, or hose.
5. Restricted air filter.
Troubleshooting / Quick Reference Guide
1. Correct short circuit condition by replacing 7.5 amp
fuse in generator control panel. Contact an Inde-
pendent Authorized Service Dealer (IASD) if fuse
continues to blow.
2. Tighten, clean, or replace as necessary.*
3. *See #2.
4. *See #2.
5. Charge or replace battery.
1. Replenish fuel / turn on fuel valve.
2. *
3. *
4. Clean; check gap; replace plug(s) if necessary.
5. Reset valve clearance.
1. Check and clean air cleaner.
2. Clean; check gap; replace plug(s) as needed.
3. Confirm fuel pressure to regulator is 10–12 in water
column (19–22 mm Hg) for LP, and 3.5–7.0 in water
column (9–13 mm Hg) for natural gas.
4. Turn fuel conversion valve to correct position.
5. Adjust valve clearance.
6. *
1. *
2. *
1. Reset generator disconnect to ON (CLOSED).
2. *
Cold 3. Check the controller screen to verify status.
1. Reset generator disconnect to ON (CLOSED).
2. *
3. *
4. *
5. *
Cold
6. Check the controller screen to verify status.
1. Adjust oil to proper level.
2. *
Engine Oil Requirements
3. See
4. Check for oil leaks.
5. Replace air filter.
Correction
.
33