AIR CONDITIONER WILL NOT START IN ANY MODE

TM 5-4120-356-14

T a b l e 4-1. Troubleshooting (continued)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

SIGHT GLASS SHOWS YELLOW INSTEAD OF GREEN (continued)

evacuate the system (see figure 4-4) and recharge the system

with refrigerant in accordance with paragraph 4-10.

Check for yellow in the sight glass after system has been purged.

Step 2.

If sight glass still shows yellow, replace the compressor in

accordance with the procedures given in paragraph 4-12.

9. AIR CONDITIONER WILL NOT START IN ANY MODE

Check electrical power source.

Step 1.

Repair electrical power source.

Check for burned out fuse(s) (paragraph 3-10f).

Step 2.

Replace burned out fuse(s).

Step 3.

Reset circuit breaker. Replace damaged or defective circuit

breaker.

Check and test selector switch in accordance with paragraph 3-10b).

Step 4.

Replace damaged or defective selector switch.

Continuity check internal power circuit in accordance with para-

Step 5.

Repair or replace damaged or defective wiring.

10. FANS DO NOT OPERATE

Continuity check fan motor circuit (see figure 3-28).

Step 1.

Repair or replace damaged or defective wiring.

Inspect and test fan motor in accordance with paragraph 3-15.

Step 2.

Repair or replace damaged or defective fan motor.

4-6