Generac Power Systems MAC400HC Owner's Manual page 29

Problem
Overheat/shutdown
condition
(Check controller for
engine fault shutdown
code)
No/low heat condition
Owner's Manual for Flameless Heat Cart
Cause
Access doors are open.
Air outlets are closed.
Front radiator or rear oil cooler are full of
debris.
Engine rpm is set too high for ambient
temperature.
Faulty temperature sensor.
Blower fan operating incorrectly.
Incorrect heater setting (target tempera-
ture too low).
Access doors are open.
Insufficient HTF/hydraulic oil level.
Clogged HTF/hydraulic oil filters.
Excessive ducting for ambient conditions.
HTF pump drive sheared.
Controller sensor fault.
Solution
Close all access doors.
Open the air outlets and verify there are no
obstructions or tight bends in the ducting.
Clean the unit.
Lower the engine rpm.
Check air outlet sensor operation.
Remove ducting; check blower fan opera-
tion.
Adjust heater output. See
Heater Output.
Close all access doors.
• 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 a GMP ASD.
Check sensor related to fault.
Troubleshooting
Adjusting
25