Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
Use of the Table
in the sequence that will
be most convenient for
of the air filter,
Item 2, follows maintenance of grilles, Item 1, which must be removed for access. Panels and grilles may be left off until
all checks have been completed. Electrical power should be disconnected from the air conditioner for all checks except
the final operating check of the controls.
Table 4-1. Unit Preventive Maintenance Checks and Services
-- Quarterly Schedule
Not Fully Mission
Item to be
Louver blades bent
Check for bent or damaged louver
Grilles and louvers
beyond repair, or missing.
blades and frames. Check freedom
Frame deformed, torn or
of operation. Straighten bent
blades or frame by hand, if
possible. To remove grilles for
repair or replacement, turn six
cam-lock studs a quarter-turn
clockwise. Apply light machine oil
to pivots of louver blades to restore
freedom of operation, if necessary.
Blot up excess oil with cloth or
Filter is perforated
Clean and service, or replace if
(1/4-inch hole or larger)
perforated, torn or otherwise
through center thickness,
damaged. Clean filter by agitating
or frame is bent or
in detergent solution or dry
damaged beyond repair.
cleaning solvent (Fed Spec P
D-680). Shake or blow dry.
Disconnect power from the air conditioner
before exposing the electrical system. The
voltage used can be lethal.
Mist eliminator is missing
Remove 18 screws and washers
from top panel, and remove top
panel. Slide mist eliminator up out
of channels. Clean by agitating in
detergent solution and rinsing in
clear water. Inspect for punctures,
tears or deformation. Replace if
damaged. Install in channels in
sure that TOP mark is up, and that
airflow arrows point outward.