COMPRESSOR AND CONDENSER FAN STOP DURING COOL MODE OPERATION, BUT CONDITIONED AIR (EVAPORATOR) FAN CONTINUES TO RUN.

TM 5-4120-393-14

Table 4-2. Unit Maintenance Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

WARNING

Disconnect input power before performing internal electrical troubleshooting.

Voltages used can be deadly.

a. Test condenser fan motor relay (K7).

(See para 4-43).

Replace if

defective.

b. Test condenser fan motor (B2). (See para 4-60). Contact Intermediate

Direct Support Maintenance if motor is defective.

Step 3.

Check to be sure there is no restriction to air flow through the condenser section.

Clean all obstructions from condenser inlet, outlets, and condenser coil.

CAUTION

If circuit breaker trips again soon after restart in COOL mode, do not attempt

another restart, and contact Intermediate Direct Support Maintenance for

refrigeration system troubleshooting.

5. COMPRESSOR AND CONDENSER FAN STOP DURING COOL MODE OPERATION, BUT CONDITIONED AIR

(EVAPORATOR) FAN CONTINUES TO RUN.

Step 1.

Check to see if high or low pressure switch is tripped.

Press then release reset button.

CAUTION

Wait at least two minutes before restarting in COOL mode. If either pressure

cutout switch trips soon after a restart is made, do not attempt another restart, and

contact Intermediate Direct Support Maintenance for refrigeration system

troubleshooting.

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