Generac Mobile MFH900, Owner'S Manual

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Owner’s Manual for Flameless Air Heater 33
Troubleshooting
IMPORTANT NOTE: See the OEM engine manual for related troubleshooting.
Engine has no
power
Clogged air cleaner
Clean element.
Clogged pre-fuel filter
Clogged fuel filter Remove water and change element.
Clogged strainer
Contact an IASD.
Engine control system
failure
Engine failure
Clogged exhaust sys-
tem
Fuel system failure
Incorrect fuel type
Electromagnetic type
fuel pump failure
Overheat/shutdown
condition
Access doors are open Close all access doors.
Air outlets are not open
Open the air outlets and verify there are no obstructions or sharp bends
in the ducting.
Front radiator or rear oil
cooler are full of debris
Clean the machine.
Engine rpm is set too
high based on ambient
temperature
Lower the engine rpm.
Faulty temperature sen-
sor
Check air outlet sensor operation.
Blower fan not operat-
ing correctly
Remove ducting; check blower fan operation.
No/low heat condi-
tion
Incorrect heater setting
(target temperature too
low)
Adjust heater output.
Access doors are open Close all access doors.
Low HTF/hydraulic oil
level
•
Check level on tank sight glass, adjust as needed.
•
Inspect HTF hoses for leaks or loose fittings.
•
Check fluid for foaming.
HTF/hydraulic oil filters
clogged
Check restriction gauges/replace HTF filters.
Ducting too long for
ambient conditions
Move unit closer to heat recipient if possible.
HTF pump drive
sheared
Contact an IASD.
Problem Possible Cause Solution