T O 35E9-229-1
Section IV. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-15. INTRODUCTION, INSPECTION, AND SERVICE
a. Systematic, periodic, Preventive Maintenance Checks and Services (PMCS) are essential to ensure that the
air conditioner is ready for operation at all times. The purpose of a preventive maintenance program is to discov-
er and correct defect and deficiencies before they can cause serious damage or complete failure of the equip-
ment. Any effective preventive maintenance program must begin with the indoctrination of operators to report
all unusual conditions noted during daily checks or actual operation to unit maintenance. All defects deficienacies
discovered during maintenance inspections must be reported, together with corrective action taken, on DA
Form 2404 (Equipment Inspection and Maintenance Worksheet).
A schedule for unit preventive maintenance inspection and service should be established immediately after
installation of the air conditioner. Aquarterly interval, equal to three calendar months or 250 hours of operation
(whichever occurs first) is recommended for usual operating conditions. When operating under unusual condi-
tions, such as a very dusty or sandy environment, it may be necessary to reduce the interval to monthly or even
less if conditions are extreme.
Table 4-1 lists the unit preventive maintenance checks and services that should
otherwise established) intervals. The PMCS items in the table have been arranged and numbered in a logical
sequence to provide for greater personnel efficiency and least amount of required maintenance downtime.
Disconnect Input power before disassembly of the air conditioner for PMCS to
prevent dangerous,possibly fatal, electrical shock.
UNIT PREVENTIVE MAINTENANCE CHECKS AND
Item To Be
a. Roll down the cover and inspect for tears, cracks, or any
b. If the necessity of washing is indicated, use fresh
water with a small amount of a mild detergent.
c. Reroll and secure the cover in the stowed position. If the
cover was washed, be sure it is thoroughly dry before