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TM5-4120-387-14
Section Ill PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-10. 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 organizational 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 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.
c .
Table 4-1 lists the organizational preventive maintenance checks and ser-
vices that should be performed at quarterly intervals (or otherwise stated in
table 4-1).
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.
Voltages used can kill.
Always disconnect power cord to air
conditioner before performing any internal maintenance.
Shutting unit off at its control panel does not disconnect
unit power.
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