Generac Mobile MFH900 Owner's Manual page 37

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