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TM 5-4120-361-14
Table 4-2.
Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
5.
6.
COMPRESSOR
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Step 9.
Step 10.
COMPRESSOR
Step 1.
Step 2.
WILL NOT START - Continued
Test for open control circuit by
4-32).
Report open-circuit condition to
Check to see if contacts on high
are open.
means of continuity check (para
direct support maintenance.
or low pressure cutout switch
Reset pressure switches.
If condition continues, report deficiency
to direct support maintenance.
Test control circuit breaker and compressor circuit breaker for
faulty operation.
Replace defective circuit breaker (para 4-27).
Test control transformer and rectifier for defective operation.
Replace defective transformer (para 4-28) and defective rectifier
(para 4-29).
Test for defective time delay relay.
Replace defective relay (para 4-27).
Test for defective compressor relay.
Replace defective relay (para 4-27).
Check to see if compressor motor is defective.
grounded winding (para 4-35).
Report motor-fault condition to direct support
STARTS BUT CUTS OUT ON OVERLOAD
Test for open
maintenance.
Check for high pressure due to improper condenser coil airflow.
Clean condenser coil and louvers.
Verify proper operation of
condenser fans and louvers.
Test condenser fan for motor failure.
or
Replace defective motor (para 4-23).
EVAPORATOR AIR OUTPUT VOLUME LOW
Step 1.
Check to see if evaporator fan speed switch is set at low speed.
Reset switch to HIGH speed.
Step 2.
Check for dirty or damaged filter or mist eliminator.
Clean or replace filter (para 4-3).
Clean
or replace mist
eliminator (para 4-9).
4-12
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