TM 9-4120-388-14
D I R E C T SUPPORT MAINTENANCE INSTRUCTIONS
Section l. REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT
5-1.
GENERAL.
a. Common tools and equipment. For authorized common tools and equipment, refer to the Modified Table of Organiza-
tion and Equipment (MTOE) applicable to your unit.
b. Special tools, TMDE, and support equipment. Test, Maintenance and Diagnostic Equipment (TMDE) and sup-
port 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.
c.
Repair parts. Repair parts are listed and illustrated in TM 9-4120-388-24P, Repair Parts and Special Tools
List, (RPSTL), covering Unit, Direct Support, and General Support Maintenance for this equipment.
d. Tool Kit. Service, Refrigeration Unit. NSN 5180-00-596-1474, contains hand tools and equipment used for
air conditioner maintenance. The following common items not contained in the refrigeration unit tool kit are also
required for air conditioner maintenance.
National Stock Number
Description
Vacuum Pump
Recovery and Recycling Unit, Refrigerant
4310-01-338-2707
Section Il. TROUBLESHOOTING
5-2. TROUBLESHOOTING TABLE.
a. The troubleshooting table (Table 5-1) Iists the most common malfunctions which you may find during the opera-
tion or maintenance of the air conditioner. You should perform the test/inspections and corrective actions in the
order listed.
b. For specific malfunctions, perform the troubleshooting procedures listed in Table 4-2 before performing proce-
c. This manual cannot list all malfunctions which may occur. However, all tests or inspections and corrective action
are listed for most common malfunctions.
d. If a malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
Disconnect power from the air conditioner before doing any maintenance work to
the electrical system. High voltage in air conditioner can kill.
Never work on this equipment unless there is another person nearby who is famil-
iar with the operation and hazards of the equipment and who is competent in ad-
ministering first aid.
Be careful not to contact high voltage connections. Keep one hand away from the
equipment to reduce the hazard of current flowing through vital organs of the body.