Table 4-1. Troubleshooting - TM-5-4120-356-140092

TM 5-4120-356-14

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

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

COMPRESSOR WILL NOT START (continued)

Inspect and test selector switch (paragraph 3-10b).

Step 5.

Replace damaged or defective selector switch.

Step 6.

Inspect and test compressor relay (paragraph 3-10h).

R e p l a c e damaged or defective compressor relay.

Step 7.

Inspect and test time delay relay (paragraph 3-10j).

Replace damaged or defective time delay relay.

Step 8.

Inspect for loose electrical connections and defective wiring

connections. Repair or replace defective wiring.

Tighten

loose

Inspect and test high and low pressure cut-out switches (paragraph

Step 9.

2. COMPRESSOR

SHORT

CYCLES

Check air conditioner operating pressures for excessive refriger-

Step 1.

R e l e a s e excessive refrigerant from system until the proper

charge is attained (figure 4-2).

Step 2.

Inspect and test liquid line solenoid valve (paragraph 3-13a).

Repair or replace damaged or defective solenoid valve (para-

graph 4-14b).

Inspect and test pressure equalizer solenoid valve (paragraph 3-

Step 3.

Repair or replace damaged solenoid valve (paragraph 4-14c).

INSUFFICIENT COOLING

Check for insufficient refrigerant in system (bubbles in sight

Step 1.

glass).

4-2