T M 9-4120-388-14
Table 2-1. Operator Preventive Maintenance Checks and Services (Cont.)
Location
Not Fully Mission
Procedure
Interval
Item to
Item
Capable If:
Check/
No.
Service
Fresh Air
Be sure of proper adjustment.
During
8
Damper
Unit not operating
Be sure of proper operation.
Control
During
9
property
Panel
Bubbles, milky flow
Refrigerant
After 15 minutes of operation in maximum cooling, be
During
10
or yellow color is
sure there are no bubbles or milky flow indicating low
Sight Glass
(Liquid
observed.
refrigerant charge. Be sure of yellow color which indi-
Indicator)
cates presence of moisture.
2-7