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 TM 55-1905-223-24-18-2
Table 3-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
MACHINE SHOP - ARC WELDER - CONT
STEP 4.Check for faulty high frequency switch.
Replace (para. 3-56).
STEP 5. Check for faulty capacitor(s).
Replace (para. 3-55).
20. Auxiliary power (outage).
STEP 1. Check for component overload.
Reduce load to 10 amperes.
STEP 2. Check for component short.
Replace faulty component (para. 3-35).
REFRIGERATORS AND FREEZERS
21. Unit does not operate
STEP 1. With multimeter, check circuit breaker.
Reset/Replace circuit breaker (para. 3-77).
STEP 2. With multimeter, check capacitor.
Replace capacitor (para. 3-77).
STEP 3. Check compressor.
Replace compressor.
22. Unit continues to run.
STEP 1. Check condenser fan running.
Replace condenser fan motor (para. 3-77).
23. Low head pressure.
STEP 1. Check compressor operating.
Replace compressor (para. 3-77).
STEP 2. Check refrigerant.
Service as required.
24. High head pressure.
STEP 1. Check for air in system.
Evacuate, change filter dryer, and recharge.
3-28
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