CONDITIONED AIR (EVAPORATOR) AND CONDENSER FANS BOTH RUN, BUT COMPRESSOR DOES NOT START AFTER TIME DELAY.

TM 5-4120-393-14

Table 4-2. Unit Maintenance Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. CONDITIONED AIR (EVAPORATOR) AND CONDENSER FANS BOTH RUN, BUT COMPRESSOR DOES NOT

START AFTER TIME DELAY.

Step 1.

Check for loose or damaged electrical connectors, or damaged wires in harness.

Tighten or replace connectors, or repair damaged wires.

Step 2.

Check operation of time delay relay (K6).

Test relay. (See para 4-50.) Replace relay if defective.

Step 3.

Check operation of circuit breaker (CB) primary contacts.

Test circuit breaker. (See para 4-42.) Replace circuit breaker if defective.

Step 4.

Check operation of compressor motor relay (K9) contacts.

Test relay. (See para 4-44.) Replace relay if defective.

Step 5.

Check operation of compressor.

If not operating, contact Intermediate Direct Support Maintenance.

4. AIR CONDITIONER STOPS COMPLETELY DURING COOL MODE OPERATION.

Step 1.

Check to see if circuit breaker is tripped.

Reset circuit breaker.

Step 2.

Check to be sure condenser fan starts immediately when a restart in COOL mode is made. If

condenser fan does not start, test as follows:

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