DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS; TMDE,
AND SUPPORT EQUIPMENT
5-1. COMMON TOOLS AND EQUIPMENT. For Authorized common tools and equipment,
refer to the Modified Table of Organization and Equipment (MTOE) applicable to your unit.
5-2. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT. Test, Maintenance and
Diagnostic Equipment (TMDE) and support equipment include electrical test equipment, standard
pressure and vacuum gages, vacuum pumps, and charging manifolds found as standard equipment
in any direct support refrigeration shop.
REPAIR PARTS. Repair parts
in the TM 9-4120-399-24P, Repair
Parts and Special Tools List (RPSTL), covering unit, direct support, and general support
maintenance for this equipment.
Section II. DIRECT SUPPORT TROUBLESHOOTING PROCEDURES
a. Table 5-1. contains Direct Support troubleshooting information for location and correcting
most of the operating troubles which may develop in the air conditioner and can be repaired at
the direct support maintenance level. Each malfunction for an individual component, unit or
system is followed by a list of tests or inspections which will help you to determine probable
causes and corrective actions to take. You should perform the tests/inspections and corrective
actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests or inspections and
corrective actions, If a malfunction is not listed or is not corrected by listed corrective actions,
notify your supervisor.
TEST OR INSPECTION
DISCHARGE PRESSURE TOO HIGH.
Step 1. Check for dirty or clogged condenser coil.