TM 9-4120-388-14
Section IV. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-15. lNTRODUCTION, lNSPECTION, AND SERVICES.
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 defects 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 operations to unit maintenance. All defects and defi-
ciencies discovered during maintenance inspections must be recorded, together with corrective action taken
on DA Form 2404, Equipment Inspection and Maintenance Worksheet.
b. A schedule for unit preventive maintenance inspection and service should be established immediately after
installation of the air conditioner. A quarterly interval, equal to three calendar months or 250 bouts of operation
(whichever occurs first) is recommended for usual operating conditions.
NOTE
When operating under unusual conditions, 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 be performed at quarterly inter-
c.
vals. The PMCS items in the table have been arranged and numbered in a logical sequence to provide for great-
er 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
ITEM TO BE
ITEM
PROCEDURES
INSPECTED/SERVICED
NO.
Fabric Cover
1
a. Roll down the cover and inspect for tears, cracks, or
any other sign of damage or deterioration.
b. If the necessity of washing is indicated, use fresh water
with a small amount of a mild detergent.
