20
Owner’s Manual for Flameless Air Heater
Troubleshooting
Problem
Cause
Solution
Exhaust Smoke is White
Needs more warm-up time.
Conduct warm-up operation.
Too much engine oil.
Correct oil level.
Engine control system fails.
Contact Generac Technical
Service.
Injection pump failure.
Fuel system failure.
Long time idling (more than two hours).
Keep stopping the equipment and
press throttle pedal.
Exhaust smoke is Black
Excessive speed.
Verify engine RPM.
Check AVR adjustment.
Injection pump failure.
Contact Generac Technical
Service.
Air cleaner is clogged.
Clean or change element.
Intercooler is clogged.
Contact Generac Technical
Service.
Fuel system failure.
Exhaust system is clogged.
Engine Overheats
No coolant.
Add coolant.
Front of radiator is clogged with dust.
Clean with soft brush.
Sub tank cap is not tightened.
Tighten or replace sub tank cap.
Coolant is fouled.
Clean inside of radiator and
change coolant.
Oil is in coolant.
Contact Generac Technical
Service.
Thermostat failure.
Change thermostat.
Oil Pressure Does Not Rise
Engine oil viscosity is incorrect.
Change with oil of correct viscosity.
Engine oil level is not sufficient.
Replenish.
Engine failure.
Contact Generac Technical
Service.
Meter, lamp or switch failure.
Engine Has No Power
Air cleaner is clogged.
Clean element.
Pre-fuel filter is clogged.
Fuel filter is clogged.
Remove water and change
element.
Strainer is clogged.
Contact Generac Technical
Service.
Engine control system failure.
Engine failure.
Exhaust system is clogged.
Fuel system failure.
Type of fuel is incorrect.
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 kinks
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 sensor
Check air outlet sensor operation
Blower fan not operating correctly
Remove ducting; check blower fan
operation
