Section 5:Troubleshooting; General Troubleshooting - Generac Power Systems MAGNUM MLT5060M Owner's Manual

Section 5: Troubleshooting

General Troubleshooting

Some of the more common problems are listed in the
table below. This information is intended to be a check or
verification that simple causes can be located and fixed.
It does not cover all types of problems. Refer to the OEM
engine operator's manual for additional troubleshooting
information. Procedures that require in-depth knowledge
or skills should be referred to a Generac Mobile Products
Authorized Service Dealer.
WARNING
Risk of burns. Allow engine to cool before
draining oil or coolant. Failure to do so could
result in death or serious injury.
Problem
Low oil pressure
shutdown
High coolant
temperature shutdown
Unit cranks, but will not
start
Overspeed or
Underspeed Shutdown
Owner's Manual for MLT Light Tower
(000139)
Table 5-1. General Troubleshooting Guide
Possible Cause
Low oil level
Oil leaking from engine
Oil pressure switch failure
Low coolant level
Blockage in radiator
Leakage in coolant hoses,
engine block, or water
pump
Fuel level low
Restricted air filter
Frequency setting incorrect
Solution
Verify oil level on dipstick. Add oil, if needed.
Visually inspect the engine for leaks.
Refer to OEM engine operator's manual to identify corrective
action.
Add coolant if needed. Allow engine to cool, then check coolant
level in radiator. Restart engine and check coolant temperature.
Stop engine immediately if coolant temperature is 210°F (99°C)
or more.
Inspect radiator shroud and ducting for blockage and remove
any foreign matter.
Inspect for visible leaks. Verify tension of water pump serpentine
drive belt.
Remove load on generator and restart engine. Verify coolant
temperature and shut engine down immediately if it starts to
overheat. Refer to the OEM engine operator's manual for
additional information on engine overheating.
Check fuel level in tank.
Verify fuel pump operation.
Inspect air filter for blockage.
Refer to OEM engine operator's manual for additional
information.
Disconnect all loads and restart unit. Read frequency (Hz) in the
LCD window on controller. Frequency should read 60 Hz.
If frequency is above 60 Hz, engine speed will need to be
adjusted. Refer to the engine operator's manual for throttle
adjustment information.
Troubleshooting
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