Section IV PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM 5-4120-393-14

Section IV PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

4-17. 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 discover and

correct defects and deficiencies before they can cause serious damage or complete failure of the equipment. 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 and deficiencies 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 hours of operation

(whichever occurs first) is recommended for usual operating conditions. 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.

c. Table 4-1 lists the unit p eventive maintenance checks and services that should be performed at quarterly (or

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.

WARNING

Disconnect input power before disassembly of the air conditioner for PMCS to

prevent dangerous, possible fatal, electrical shock.

NOTE

Model F60T-HS may be equipped with a 16 inch adapter duct instead of the

conditioned air outlet and inlet grilles.

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