TM 9-4120-402-14
Table 5-1. DIRECT SUPPORT TROUBLESHOOTING - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
REFRIGERANT SYSTEM CONTINUOUSLY LOSING REFRIGERANT.
WARNING
Use great care to avoid contact with liquid refrigerant or refrigerant gas being discharged from
any container under pressure. Sudden and irreversible tissue damage can result from freezing.
Wear gloves and a face protector or safety glasses in any situation where skin or eye contact is
possible.
Prevent contact of refrigerant gas with flame or hot metal surfaces. Heat causes the refrigerant
to break down and form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
Step 1.
Check refrigerant tubing and components for leaks using a leak detector. (See paragraph 5-15.)
Repair or replace as required.
Step 2.
Replace if defective.
5.
AIR CONDITIONER OPERATES CONTINUOUSLY ON COOLING CYCLE.
Step 1.
Move control to WARM.
WARNING
Disconnect power from the air conditioner before doing any maintenance work to the electrical
system. High voltage in air conditioner can kill.
Step 2.
Check potentiometer TEMPERATURE control. (See paragraph 4-29.) Replace if defective.
WARNING
Disconnect power from the air conditioner before doing any maintenance work to the electrical
system. High voltage in air conditioner can kill.
Step 3.
Replace if defective.
5-7