TM 9-4120-388-14
Table 5-1. Troubleshooting for Direct Support Maintenance - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
REFRIGERANT SYSTEM CONTINUOUSLY LOSING REFRIGERANT - Continued.
Step 1. Check refrigerant tubing and components for leaks using a leak detector. (See para 5-10.)
Repair or replace as required.
5. UNIT OPERATES CONTINUOUSLY ON COOLING CYCLE.
Step 1. Check position of temperature selector switch.
Move selector to WARMER.
High voltage can kill.
Step 2. Check temperature selector switch S1 for continuity.
Replace if defective.
High voltage can kill.
6. SIGHT GLASS APPEARS YELLOW INSTEAD OF GREEN.
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 thermal protective gloves and a face protector or safety glasses in any situa-
tion where skin or eye contact is possible.
Prevent contact of refrigerant gas with frame or hot metal surfaces.
Heat causes the refrigerant to breakdown and form carbonyl chloride (phosgene),
a highly toxic and corrosive gas.
5-5