AIR CONDITIONING (Cont) - TM-55-1905-223-24-170147

TM 55-1905-223-24-17

Table 3-1. Troubleshooting - CONT

Malfunction

Test or Inspection

Corrective Action

AIR CONDITIONING - CONT

STEP 3.

Check for open contact on internal overload protector in compressor (A/C-1 and 3).

Allow time for compressor to cool and automatically reset. If it does not reset when cooled

down, do the following. Check for "open" or "short" in compressor (paragraph 2-15).

Replace as required (paragraph 3-25).

STEP 4.

Check for defective compressor or compressor motor.

Test compressor or compressor motor for a "short" or "open" condition (paragraph 2-17).

Replace defective compressor (paragraph 3-25).

11.

Compressor short cyles on high pressure cut-out.

STEP 1.

Check to see if high (discharge) pressure control (solenoid) is defective. Check for

defective control. Replace as required (paragraph 3-25).

12.

No cooling - blower does not run.

STEP 1.

Check to see if fan relay or capacitor is defective (A/C-1 and 3).

Replace relay or capacitor as required (paragraph 3-25).

STEP 2.

Check for defective fan motor. Replace fan motor (paragraph 3-25).

13.

No cooling - blower running.

STEP 1.

Check for defective run capacitor (self-contained units; A/C-1 and 3). Replace as required

14.

Partial or insufficient cooling - blower running.

STEP 1.

Check for low refrigerant charge. Find and repair leak (Malfunction 10). Evacuate and

recharge system with R-22 (paragraph 3-10).

STEP 2.

Check for air in system. Remove refrigerant, evacuate, and recharge with R-22 (paragraph

3-9