TM 9-4120-407-14
Table 2-1. Preventive Maintenance Checks and Services for Model F36T-MPI - Cont
Location
Not Fully Mission Capable
Procedures
Item To
Item
Interval
if:
Check/Service
No
During
When the air conditioner is
LIQUID SIGHT
7
operating in cooling mode and
INDICATOR - Cont
fan motors have been running
for at least five minutes,
observe the liquid sight
indicator.
NOTE
while
running
be
observing the liquid
indicator.
Constant flow of bubbles or
a. The chamber should be
Foam is observed.
clear (no bubbles or foam)
or it may have occasional
flashes of bubbles or foam.
NOTE
The appearance of an
occasional bubble in the
sight glass c a n b e
expected, especially
when operating in a
ambient
high
temperature. A gradual
increase in the number
is usually an indication
that the refrigerant
charge is being lost from
the system through a
small leak.
2-11