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TM 9-4120-367-14
TM 07592B-14/1
TABLE 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued
Item
Item To
Not Fully Mission
No.
Interval
Check/Service
Procedure
Capable If:
4
Before
Condenser Air Intake,
a. Check that condenser air dis-
a Condenser air dis-
Discharge and Fresh
charge is clear.
charge is blocked.
Air Filter
b. Check that there are no fumes
b. Fumes or heat are
or heat within 10 ft. of unit.
within 10 ft. of unit.
c. Check that condenser air in-
c. Condenser air intake
take is clear and guard is not
is blocked or guard
damaged.
is damaged.
d. Check fresh air filter for dam-
d. Fresh air filter is
age or blockage.
damaged or
blocked.
5
Before
Return Air Intake Fil-
a. Inspect fresh air vent control
a. Fresh air vent
ter and Fresh Air Vent
for proper operation.
control operates
Control
improperly.
b. Inspect return air intake filter.
b. Filter is dirty.
6
During
Fresh Air Intake
Check for blockage.
7
During
Condensate Drain
Check water dripping.
Water drip anywhere
besides through drain.
8
During
Sight Glass
a. Check after air conditioner has
run (cool mode) 15 min.
b. Check Moisture Indicator.
Bubbles are present or
Center should be clear without
"yellow" appears.
bubbles. Colors indicate:
• Green - no moisture
• Chartreuse - moisture
• Yellow - replace drier/filter
and refrigerant
9
During
Air Conditioner Unit
During starting and operation,
check for unusual noise and rough
running. Check for excessive
vibration, lack of power, or any in-
dication of a failing or defective
component. If suspected, notify
unit maintenance.
2-6
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