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OPERATION UNDER RAINY OR HUMID CONDITIONS.
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TM-5-4120-369-14 Air Conditioner Horizontal Compact 18 000 BTU 208 Volt 3 Phase 50-60 Hertz NSN
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Table 3-1. Troubleshooting - TM-5-4120-369-140035
TM 5-4120-369-14
MAINTENANCE INSTRUCTIONS
LUBRICATION INSTRUCTIONS
Section I.
FAN MOTORS.
The evaporator and condenser motors are premanently lubricated by the manufacturer and
require no additional lubrication.
The compressor and compressor motor are fully lubricated by the manufacturer and require
no additional lubrication.
TROUBLESHOOTING
Section II.
3-3.
GENERAL.
This section contains information that is useful in diagnosing and correcting troubles which
cause the unsatisfactory operation or failure of the air conditioner.
OPERATOR'S TROUBLESHOOTING CHART.
Troubleshooting procedures for operator-crew are listed in table 3-1.
a.
This section contains troubleshooting information for locating and correcting most of
the operating troubles which may develop in the air conditioner. Each malfunction for an
individual component, unit, or system is followed by a list of test or inspections which will help
you to determine corrective actions to take.  You should perform the tests/ inspections and
corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, nor all tests or inspections
b.
and corrective actions.  If a malfunction is not listed or is not corrected by listed corrective
actions, notify your supervisor.
The table lists the common malfunctions which you may find during the operation or
c.
maintenance of the air conditioner or its components.  You should perform the tests/inspections
and corrective actions in the order listed.
MAINTENANCE PROCEDURES.
Section III.
3-5.
GENERAL.
This section contains maintenance procedures for the operator of the air conditioner.
Operator maintenance is limited to inspection and procedures that can be accomplished without
the aid of servicing tools.  Any indications of need for servicing resulting from inspection will
be reported to Direct Support.
3-6.
CONDENSER FABRIC COVER.
Inspect condenser fabric cover for torn places.  Repair minor tears with waterproof tape.
Report extensive damage to organizational maintenance.
DRAINS.
Inspect condensate water drains, figure 1-2, for obstructions. Remove obstructions.
Report
total blockage to organizational maintenance.
LIQUID SIGHT INDICATOR.
Wipe refrigerant liquid sight indicator glass, figure 1-2, with a soft, clean cloth, set
controls, figure 2-1, at COOL-COOLER, operate air conditioner for 15 minutes, then observe
liquid sight indicator.  Yellow appearance indicates moisture in system. Bubbles or milky
flow indicate low refrigerant charge.  Report presence of these conditions to Direct Support
maintenance.

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