TM 9-4110-258-13
Table 2-1. Operator Preventive Maintenance Checks and Services - Continued
Location
Item
Interval
Item to
Procedure
Not Fully Mission
No.
Check/
Capable If:
Service
10
During
Sight
NOTE
Indicator
The sight indicator must not be
inspected when the DEFROST IN
PROGRESS or HEATING CYCLE ON
indicators are on.
The sight indicator can be viewed
looking through the left side
condenser door.
Inspect sight indicator port for constant bubbles
Sight indicator port shows
or foaming and note center indicator color. If
constant bubbles or foam.
constant bubbles or yellow indicator are seen,
Center indicator color is
shut down refrigeration unit and notify direct
yellow.
support maintenance to leak check and evacuate
refrigeration system as necessary.
11
During
NOTE
(Oil Level
Sight Glass)
The sight glass must not be inspected
when the DEFROST IN PROGRESS
or HEATING CYCLE ON indicators
are on.
The sight glass can be viewed looking
through the front bottom panel.
Safe operating level is between
and way up the sight glass.
Inspect the sight glass port for low or high oil
Sight glass port oil level
level and foaming. If oil level is out of safe
above or below safe
operating range or foaming, shut down
operating range or
refrigeration unit and notify direct support
foaming.
maintenance to leak check and add oil to or
remove oil from compressor as necessary.
2-10
