TM 9-4120-385-14
Table 5-1. TROUBLESHOOTING FOR DIRECT SUPPORT MAINTENANCE Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check refrigerant tubing and components for leaks using a leak detector.
Step 1.
Refer to Paragraph 5-3.
Repair or replace as required.
Check pressure relief valve. Refer to Paragraph 521.
Step 2.
Replace if defective. Refer to Paragraph 5-21.
5. UNIT OPERATES CONTINUOUSLY ON COOLING CYCLE
Step 1.
Check position of temperature selector switch.
Move selector to WARMER.
WARNING
High voltage can kill.
Check temperature selector switch S1 for continuity.
Step 2.
Replace if defective.
WARNING
High voltage can kill.
Check solenoid valve L1. Refer to Paragraph 5-16.
Step 3.
Replace if defective. Refer to Paragraph 5-16.
6. SIGHT GLASS APPEARS YELLOW INSTEAD OF GREEN
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.
5-8
