AIR CONDITIONER DOES NOT COOL CAB - continued

TM 10-3930-673-20-1

WARNING

Always wear eye and hand protection when working on an air conditioning system or compressor. Liquid refrigerant can cause

frostbite and/or blindness.

CAUTION

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-

ventilated area.

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

destroy materials.

HEATER/AIR CONDITIONER SWITCH

VISUAL INSPECTION

Press cab heater/air conditioner switch to ON

position.

(a) If green switch light is ON and

blower functions, go to Step 2 of

this fault.

(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

operate.

HEATER/AIR

BONDITIONER

SONDITIONER

LOWER SWITCH

ELECTOR SWITCH

TR01475

2-763