Engine Fault Shutdown Troubleshooting - Generac Power Systems MAGNUM MTP4SZ Owner's Manual

Troubleshooting

Engine Fault Shutdown Troubleshooting

Symptom
Low oil pressure shutdown
High temperature shutdown
Overcrank shutdown
Overspeed shutdown
No speed signal shutdown
Low fuel shutdown
Low coolant shutdown
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Possible Cause
Low oil level
Faulty oil pressure sender
Incorrect oil grade
Worn oil pump
Oil leak
Low coolant level
Faulty temperature sender
Coolant leaks
Worn water pump
Pump engine will not start
Pump cavitation
Air trapped in intake hose
Intake insufficiently submerged
Air leak in intake hose
Air leak at pump housing
Engine magnetic pickup damaged or
misaligned
Low fuel level
Low coolant level
Solution
Check oil level, replace as neces-
sary
Replace oil pressure sender
Change engine oil, refer to engine
operating manual
Refer to engine operating manual
Refer to engine operating manual
Check coolant level, replace as nec-
essary
Replace temperature sender
Refer to engine operating manual,
replace components as necessary
Refer to engine operating manual
Refer to engine operating manual
Reduce engine speed, lower intake
hose
Relocate and/or straighten intake
hose
Lower intake hose
Inspect intake hoses and couplings
for damage or missing components
and seals
Inspect gaskets, seals and O-rings
at pump intake flange, clean out
cover and priming port
Inspect magnetic pickup for damage/
alignment
Refill fuel tank with clean diesel fuel
Allow engine to cool. Check coolant
level in radiator. Add coolant until it
is 3/4 in. (19 mm) below the filler
neck
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