Generac Power Systems MAGNUM MLT4060MVD Owner's Manual page 50

General Troubleshooting
Problem
Unit cranks, but will not start
Unit starts, but stumbles and dies
High coolant temperature shutdown
Low oil pressure shutdown
Unit stalls when export power is used
One or more lights do not turn on
The lights are flashing
If problems persist, contact Generac Mobile Products at 1-800-926-9768 for assistance.
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Table 5-1. General Troubleshooting Guide
Possible Cause
Fuel level low.
Fuel flow obstructed.
Air in fuel system.
Restricted air filter.
Glow plug(s) inoperable.
Ambient temperature too low.
Intake heater inoperable.
Low coolant level.
Blockage in radiator.
Debris on radiator face.
Broken coolant pump belt.
Cooling fan inoperable.
Oil level low.
Oil pump inoperable.
Load exceeds unit rating.
Light breaker tripped.
Lights not turned on.
Dusk-to-dawn sensor
adjustment needed.
Generator frequency too low.
Solution
Check fuel level in tank.
Check fuel pump operation.
Inspect fuel supply hose from tank to fuel filter for
cracks and abrasion.
Check for gelled fuel in fuel system in cold
weather, especially at fuel filter.
Bleed air from fuel system.
Inspect air filter for blockage.
Refer to OEM engine operator's manual for
additional information.
Check if ambient temperature is within unit limits.
Check engine air inlet heater functionality.
Allow engine to cool, then check coolant level in
radiator. Add coolant if needed.
Inspect radiator surroundings for blockage and
remove any foreign matter.
Inspect for visible leaks. Check tension of water
pump drive belt.
Remove load on generator and restart engine.
Check coolant temperature and shut engine down
immediately if it starts to overheat.
Check oil level. Add oil if necessary.
Contact an ASD.
Turn outlet breaker ON and load sense switch
OFF, confirm generator output is 60hz + or - 2hz.
Reapply load.
Check light breakers.
Check electronic control to see if lights are on.
Turn lights on.
Adjust the dusk-to-dawn sensor according to
Dusk to Dawn Sensor
.
Check if AC frequency is >40hz.
Owner's Manual for MLT4060MVD Light Tower