TM 9-4120-407-14
Table 3-3. Unit Troubleshooting Table - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. AIR CONDITIONER DOES NOT START IN ANY MODE. - Cont
If circuit breaker is defective, replace it per paragraph 3-38.
Step 5. Test EMI filters per paragraph 3-26.
If EMI filters are defective, replace them per paragraph 3-26.
If transformer is defective, replace it per paragraph 3-31.
If rectifiers are defective, replace them per paragraph 3-30.
If motor controller appears to be damaged, notify Direct Support Maintenance.
If logic box assembly appears to be damaged, notify Direct Support Maintenance.
Step 10.
Test motor controller by observing if fault lights come on.
If the motor controller fails, no fault lights will be on, notify Direct Support Maintenance.
Step 11.
Test logic box assembly by observing if fault lights come on.
If the logic box assembly fails, no fault lights will be on, notify Direct Support
Maintenance.
2. COMPRESSOR DOES NOT START IN COOL MODE.
Step 1. Check that the potentiometer TEMPERATURE control (1) is in the COOL position.
Adjust the potentiometer TEMPERATURE control toward the COOL position.
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