UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM9 4120-423-14&P

UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

THIS WORK PACKAGE COVERS:

Introduction

PMCS Procedures

Personnel Required

Unit Technician

Equipment Conditions

Air Conditioner shut down

INTRODUCTION

GENERAL. Systematic, periodic, preventive maintenance checks, and services (PMCS) are essential to

ensure 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 failure of the equipment. Any effective preventive maintenance

program must begin with the training 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).

INSPECTION AND SERVICE SCHEDULING

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.

The following table lists the unit preventive 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.

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