Chapter 3. MAINTENANCE INSTRUCTIONS

TM 5-4120-369-14

MAINTENANCE INSTRUCTIONS

CHAPTER 3.

LUBRICATION INSTRUCTIONS

Section I.

3-1.

FAN MOTORS.

The evaporator and condenser motors are premanently lubricated by the manufacturer and

require no additional lubrication.

3-2.

COMPRESSOR.

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.

3-4.

OPERATOR'S TROUBLESHOOTING CHART.

Troubleshooting procedures for operator-crew are listed in table 3-1.

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

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

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.

3-7.

DRAINS.

Inspect condensate water drains, figure 1-2, for obstructions. Remove obstructions.

Report

total blockage to organizational maintenance.

LIQUID SIGHT INDICATOR.

3-8.

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.

3-1