section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM5-4120-383-14

Section III

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

GENERAL.

Systematic, periodic, preventive maintenance checks and services

(PMCS) are essential to insure that the air conditioner is ready

for operation in any mode 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

Any effective preventive maintenance

failure of the equipment.

program must begin with the training of operators to report all

unusual conditions noted during daily checks or actual operation

to organizational 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).

INSPECTION AND SERVICE.

a. A schedule for organizational 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.

Table 4-1 lists the organizational preventive maintenance

checks and services that should be performed at quarterly (or

otherwise established) intervals.

Figure 4-6 shows the location of

PMCS items. 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.

The

"Para Ref" (Paragraph Reference) column on the right side of the

table provides the paragraph number where detailed, step-by-step

The

disassembly/reassembly maintenance procedures may be found.

item number column will be used as a source of item numbers for the

TM Number Column on DA Form 2404.

Disconnect input power before disassembly of the air

conditioner for PMCS to prevent dangerous, possibly

fatal, electrical shock.