TM 9-4120-388-14
Table 4-2. Unit Troubleshooting (Cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5. Be sure condenser air inlet and outlet are not obstructed.
Remove obstructions.
Step 6. With unit operating in COOL mode, check condition of refrigerant in sight glass.
a. If color is yellow of a light hue of chartreuse, or if numerous bubbles appear, turn air, conditioner
OFF, and notify your supervisor for refrigeration system servicing.
b. If color is green or a dark hue of chartreuse, but has a milky appearance, or more than an occasion-
al bubble appears, thoroughly dean the condenser intake screen, condenser fan guard, condenser
c. Clean and service, or replace mist eliminator. (See para 4-35.)
d. Clean evaporator coil and entire evaporator system. (See para 4-64.)
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