TB-9-2320-302-13-P-3
CREW PROTECTION KIT; AIR CONDITIONING KIT PART 3 OF 3
TECHNICAL BULLETIN; OPERATOR’S, UNIT, AND DIRECT SUPPORT, MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LIST
MARCH 2008
TB-9-2320-302-13-P-3 - Page 65 of 240
TB 9-2320-302-13&P-3
0013 00-1
A/C TROUBLESHOOTING PROCEDURES
0013 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
GENERAL TROUBLESHOOTING
1.
A/C Unit Not Producing Cool
Air.
1. Inspect evaporator assembly filter (WP
0010 00).
1. Replace filter if obstructed.
2. If filter is not obstructed, proceed
to next step.
2. Check system pressures to ensure all
components are operating correctly.
Refer to
A/C System Pressure
Diagnosis
in this work package.
3. Check system for leaks (WP 0015 00).
Repair or replace leaking
components and recharge system
(WP 0015 00).
2.
Compressor Noise or Vibration.
1. Set A/C Fan Switch to OFF position (WP
0004 00).
2. Turn ignition key switch to OFF position
(TM 9-2320-363-10).
3. Check to see that belt tension is correct
(120 lb).
Adjust belt tension (WP 0016 00).
4. Check to see if compressor is seized.
(a) Remove belt (WP 0016 00).
(b) Attempt to rotate compressor by
hand.
Replace compressor (WP 0016 00).
5. Check alignment of pulley.
Align pulley (WP 0016 00).
6. Check compressor mounting bolts for
tightness.
Tighten compressor mounting bolts
(WP 0016 00).
7. Check if system is overcharged. System
should contain 3.25 lb of refrigerant.
1. Recover refrigerant (WP 0015 00).
2. Recharge system (WP 0015 00).
3.
Frozen Evaporator Assembly
Coil - Reduced Air Flow.
1. Troubleshoot compressor and thermostat
(refer to
A/C Electrical Troubleshooting
,
Malfunction, step 5).
Replace compressor (WP 0016 00) or
thermostat (WP 0017 00).
2. Verify A/C system pressures (WP 0015
00).
Refer to
A/C System Pressure
Diagnosis
in this work package.
3. Inspect wiring harness inside evaporator
assembly for damage. Remove
evaporator assembly cover (WP 0017
00) to access wiring harness.
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