Install Manual

Troubleshooting
Installation Guidelines For 60 Hz Air-Cooled Generators 37
Section 8: Troubleshooting
System Diagnosis
Problem Cause Correction
Engine will not crank. 1. Blown fuse.
2. Loose, corroded, or defective battery
cables.
3. Defective starter contact.
4. Defective starter motor.
5. Discharged battery.
1. Correct short circuit condition by replacing 7.5
amp fuse in generator control panel. If fuse con-
tinues to blow, contact an IASD for assistance.
2. Tighten, clean, or replace as necessary.*
3. *See #2.
4. *See #2.
5. Charge or replace battery.
Engine cranks but will not
start.
1. No fuel
2. High fuel pressure.
3. Fuel selector in wrong position.
4. Defective fuel solenoid (FS).
5. Open Wire 14 from engine control board.
6. Defective spark plug(s).
7. Valve clearance out of adjustment.
1. Replenish fuel / turn on fuel valve.
2. Check and adjust fuel pressure.
3. Turn fuel conversion knob to correct position.
4. *
5. *
6. Clean; check gap; replace plug(s) as needed.
7. Reset valve clearance.
Engine starts hard and runs
rough.
1. Plugged or damaged air cleaner.
2. Defective spark plug(s).
3. Incorrect fuel pressure.
4. Fuel selector in wrong position.
5. Internal engine issue.
1. Check / replace 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 in.
water column (7–13 mm Hg) for NG
.
4. Turn fuel conversion knob to correct position,
and program controller for fuel type.
5. *
Generator is set to OFF, but
the engine continues to run.
1. Controller wired incorrectly.
2. Defective control board.
1. *
2. *
No AC output from
generator.
1. MLCB (generator disconnect) is OFF
(OPEN).
2. Generator internal failure.
3. Engine may be warming up. Refer to
Cold
Smart Start
.
1. Reset circuit breaker to ON (CLOSED).
2. *
3. Check controller screen to verify status.
No transfer to standby after
utility source failure.
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
Cold
Smart Start
.
1. Reset circuit breaker to ON (CLOSED).
2. *
3. *
4. *
5. *
6. Check controller screen to verify status.
Unit consumes large
amounts of oil.
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.
1. Adjust oil to proper level.
2. *
3. See “Engine Oil Recommendations”.
4. Check for oil leaks.
5. Replace air filter.
* Contact an Independent Authorized Service Dealer or visit www.generac.com for assistance.