20
OPM-160/A
TROUBLESHOOTING TABLES
UNIT WILL NOT
CRANK WHEN THE
POWER FAILS
1. Digital genset controller not in “AUTO”
2. Transfer control switch not in “AUTOMATIC”.
3. Incorrect wiring between transfer switch and
generator.
4. Loose or dirty battery terminals.
5. Defective engine control module.
6. Defective starter.
7. Defective start solenoid.
8. Defective start/stop control in the transfer
switch.
9. ATS panel in fault from previous run cycle.
10. Blown fuse on generator control panel.
ENGINE WILL NOT
CRANK USING START
BUTTON ON THE
GENERATOR
1. Low or dead battery, must hold 12 Volts
during cranking.
2. Blown fuse on generator control panel.
3. Loose or dirty battery terminals.
4. Defective engine control module.
5. Defective starter.
6. Defective start solenoid.
7. Locked up engine generator set.
ENGINE WILL NOT
COME UP TO SPEED
AFTER IT STARTS
1. Insufficient fuel volume getting to the unit.
a. Fuel line too small.
b. Low fuel pressure.
2. AC short circuit.
3. Governor is defective.
ENGINE CRANKS BUT
WILL NOT START
1. Improper fuel pressure being delivered to
unit.
2. Fuel supply shut-off.
3. Fuel supply empty.
4. Defective spark plug.
5. Defective engine ignition module.
6. Dirty air cleaner filter
7. Defective fuel solenoid valve.
8. Low voltage from battery to fuel solenoid,
must hold 12 Volts during cranking.
9. Defective fuel regulator.
10. Defective starter/fuel solenoid relay(s).
ENGINE START AND
THEN STOPS -
Alarm light comes on
1. Engine is low on oil
2. Engine has high water temperature.
3. Engine has overspeed.
4. Engine has gone into overcrank.
5. No output from engine alternator to engage
stop crank cycle.
6. Generator is not operating at the correct
speed.
ATS PANEL WILL
NOT TRANSFER TO
EMERGENCY SUPPLY
1. No AC generator out put from generator.
2. See Automatic Transfer Switch Manual.
ATS PANEL WILL NOT
PULL IN ON NORMAL
POWER
1. See Automatic Transfer Switch Manual.
NO AC OUTPUT FROM
GENERATOR
1. Defective diodes.
2. Defective voltage regulator.
3. Defective rotor.
4. Defective stator.
5. Defective exciter rotor.
6. Defective exciter stator.
7. AC short in the input leads.
8. Defective/Open breaker.
9. Wiring error.
