Always wear eye and hand protection when working on an air conditioning system or compressor. Liquid refrigerant can cause
frostbite and/or blindness.
Before disconnecting lines, make sure refrigerant has been removed from air conditioning system by recovering it with
appropriate recovery equipment. Do not mix refrigerant in same recovery equipment.
When working on compressors, always relieve internal pressure first. Internal compressor pressure can be relieved by removing
oil plug, or by removing shipping caps/pads from ports.
Keep refrigerants and oils away from open flames. Refrigerants can produce poisonous gases in open flames. Work in well-
Do not introduce compressed air into an air conditioning system due to danger of contamination.
Washing oil seals, electrical cables and flexible hoses with dry cleaning solvents or mineral spirits will cause serious damage or
HEATER/AIR CONDITIONER SWITCH
Press cab heater/air conditioner switch to ON
(a) If green switch light is ON and
blower functions, go to Step 2 of
(b) If green switch light is not ON and
blower does not function, go to
Electrical System Trouble-shooting
Fault 30, Air conditioner does not