TM 9-4120-388-14
Table 5-1. Troubleshootlng for Direct Support Maintenance - Continued.
MALFUNCTION
TEST OR INSPECTON
CORRECTIVE ACTION
6. SIGHT GLASS APPEARS YELLOW INSTEAD OF GREEN - Continued.
Step 1. Yellow appearance of sight glass is caused by contamination in the refrigerant.
a. Release refrigerant. (See para 5-7.)
b. Remove dehydrator. (See para 5-14.)
c. Purge and dry system. (See para 5-8.)
d. Install new dehydrator. (See para 5-14.)
e. Evacuate system. (See para 5-11.)
f. Recharge with refrigerant. (See para 5-12.)
Step 2. Check for yellow in sight glass after allowing compressor to run for at least 1 hour.
Repeat corrective action in Step 1 above.
7. AIR CONDITIONER NOISY DURING OPERATION.
Step 1. Check expansion valve. (See para 5-23.)
Adjust or replace. (See para 5-23.)
Step 2. Check quench valve. (See para 5-20.)
Adjust or replace. (See para 5-20.)
5-6
