Product Manual

Owner’s Manual for Mobile Generator 49
Section 5: Troubleshooting
General Troubleshooting
This information is intended to be a check or verification
for simple causes that can be located and fixed. It does
not cover all types of problems. See the engine operator’s
manual for additional troubleshooting information. Proce-
dures that require in-depth knowledge or skills should be
performed by a GMASD.
Problem Possible Causes Solution
Low fuel level shutdown Low fuel level Check fuel level on controller.
Unit not level Verify unit is sitting level to ensure an accurate reading.
Leaking fuel tank Check tank for leaks.
Damaged fuel sender or
wiring
Check for continuity between sender and engine controller.
Low oil pressure
shutdown
Low oil level Check oil level on dipstick. Add oil if needed.
Leaking oil from engine Visually inspect the engine for leaks. Restart unit and verify loss of
pressure. Shut down immediately if pressure does not reach 5 psi
(34.5 kPa) within five seconds.
Oil pressure sender See the OEM engine operator’s manual to identify corrective action.
Low coolant level
shutdown
Low coolant level Allow engine to cool, then check coolant level in radiator. Add coolant if
needed.
Leaking coolant hoses Inspect hoses for leaks. Repair or replace as necessary.
Leaking engine block or
water pump
Visually inspect for leaks. Verify no coolant has mixed with the engine
oil (oil will appear milky). See the OEM engine operator’s manual for
additional information.
High coolant
temperature shutdown
Low coolant level Add coolant if needed. Allow engine to cool, then check coolant level in
radiator. Restart engine and check coolant temperature (on controller).
Stop engine immediately if coolant temperature is 210 °F (99 °C) or
higher.
Blockage in radiator Check radiator shroud and ducting for blockage and remove any
foreign matter.
Leakage in coolant hoses,
engine block, or water
pump
• Inspect for visible leaks. Check tension of water pump serpentine
drive belt.
• Remove load on generator and restart engine. Check coolant
temperature and shut down engine immediately if it starts to
overheat. See the OEM engine operator’s manual for additional
information on engine overheating.
Overcrank shutdown Fuel level low • Check fuel level in tank.
• Check fuel pump operation.
• Check air filter for blockage.
• See the OEM engine operator’s manual for additional information.