TM 9-4120-398-14
TABLE 2-1. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES - Continued
A - After
B - Before
W Weekly
D - During
Item
Item To Be
Interval
Equipment Is Not
Procedures
No.
Inspected
Ready/Available If:
Check for and have
repaired or adjusted
as necessary
Fresh Air
control chain
5
Check for proper adjust-
Damper
ment.
broken, missing
or inoperable.
Check for freedom of
operation.
Drain Hose
Water collecting.
6
Check for water collection.
Control panel
7
External
Check for obvious damage
Control Panel
and missing knobs.
damaged.
Unit not operating
Check for proper operation.
properly.
Bubbles or milky
Sight Liquid
8
After 15 minutes of oper-
Indicator
flow is observed.
ation in maximum cooling,
check for bubbles or milky
flow indicating low refrig-
erant charge. Check for
yellow color which indi-
cates presence of moisture.
Section III. OPERATION UNDER USUAL CONDITIONS
Services of Unit Maintenance should be employed for
ASSEMBLY AND PREPARATION FOR USE.
original unpacking, assembly installation, preparation for use, and other setup procedures. See paragraphs 4-2 thru 4-9.
INITIAL ADJUSTMENTS AND CHECKS
a. Inspect all covers, panels, grilles, and screens for loose mounting, obstructions, or shipping damage. Report any
deficiencies to unit maintenance.
b. Perforrn the before operation preventive maintenance checks and services listed in table 2-1.
