DIRECT SUPPORT TROUBLESHOOTING PROCEDURES

TM 9-4120-425-14&P

DIRECT SUPPORT TROUBLESHOOTING PROCEDURES

0047-00

THIS WORKPACKAGE COVERS:

Compressor Will Not Start, Compressor Starts But Stops At Once, Insufficient Cooling, Compressor

Runs But Does Not Cool, Compressor Excessively Noisy, Suction Pressure Too Low or Too High,

Low Heat or No Heat

INITIAL SETUP:

Maintenance Level

Direct Support

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, WP 0118-00)

Tool Kit, Service, Refrigeration Unit (Item 2, WP 0118-00)

Recovery and Recycle Unit, Refrigerant (Item 5, WP 0118-00)

Mask, Air Filtering (Item 29, Table 1, WP 0121-00)

Test Equipment:

Multimeter

Electronic refrigerant gas leak detector

References

Schematic Diagrams WP 0122-00

Equipment Condition

Mode selector switch in OFF position.

Main power source is disconnected.

Panels removed (WP 0019-00).

WARNING

Disconnect air conditioner power supply.

Table 1. Troubleshooting Procedures

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

COMPRESSOR WILL NOT

Make continuity check of control

Repair loose or broken

START

circuit and components. See WP

connections.

0122-00 for control circuit

schematic diagram. (Refer to WP

Replace bad components. (Refer

If fans do not operate, make

Replace bad circuit breaker. (Refer to

continuity check of circuit

breaker. (Refer to WP 0033-00.)

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