TM 9-4120-403-14
TABLE 2-1. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (Cont)
B - Before
D - During
A - After
Item
Item to be Inspected.
Equipment Is Not
No.
B
D
A
Procedure
Ready/Available If:
9
Refrigerant Sight Glass
After 15 minutes of operation
Bubbles, milky appearance,
in maximum cooling, check for
or yellow color is observed.
bubbles or milky appearance
indicating low refrigerant
charge. Check for yellow color
which indicates presence of
moisture.
2-10