TB-9-2320-279-13-1

TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM

OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS

DECEMBER 2005

TB-9-2320-279-13-1 - Page 177 of 524

TB 9-2320-279-13-1

0015-9

AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

DRAFT

WARNING

•

Moving engine components can cause severe injury.

Keep away from fan, belts, and pulleys while

engine is running.

•

Wear protective goggles and nonleather gloves when servicing air conditioner system.

Failure to

comply may result in injury to personnel.

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VISUAL INSPECTION

HEMAC177

(1)

Inspect AC condenser dryer moisture sight glass.

(a) If AC condenser dryer sight glass indicates a

low charge:

1.

Shut off engine (TM 9-2320-279-10).

2.

Perform leak test (WP 0049).

NOTE:

Perform Steps 3 through 6 only if leaks are

found.

3.

Recover R-134a refrigerant (WP 0050).

4.

Repair leaks found.

5.

Replace AC condenser dryer (WP 0025).

6.

Evacuate system (WP 0050).

7.

Charge system (WP 0050).

8.

Start engine.

9.

Operate AC system for 5 to 10 minutes at

high blower speed (WP 0004).

10. Go to Step 5 of this fault.

(b) If AC condenser dryer sight glass indicates

system is fully charged, go to Step 5 of this

fault.