TM 9-4120-385-14
Table 5-1. TROUBLESHOOTING FOR DIRECT SUPPORT MAINTENANCE Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Check area near condenser guard and fresh air inlet for heat source over
120 F (40 C).
Remove heat source.
Step 5.
Check sight glass after operating unit for 15 minutes with temperature
switch in maximum COOLER position. Center should be bubble free and
green.
Add refrigerant. Refer to Paragraph 5-8.
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 thermal protective 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.
Check for refrigerant leaks. Refer to Paragraph 5-3.
Step 6.
Repair or change defective part.
WARNING
High voltage can kill.
Check solenoid valves L1 and L2. Refer to Paragraph 4-28.
Step 7.
Repair or replace if defective. Refer to Paragraph 5-16.
5-6
