TM 9-4120-399-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AIR CONDITIONER FAILS TO OPERATE IN ANY MODE.
Step 1.
Check to see if main power cord is plugged in.
Connect power cable to a source supplying 208 VAC, three phase,
400 Hertz power.
Step 2.
Check to see if AC control supply circuit breaker is in the ON
position.
Place AC control circuit breaker in the ON position.
Step 3.
Check to see if DC control circuit breakers is in the ON position.
Place control circuit breaker in the ON position.
If the air conditioner will not operate, check for a defective circuit
breaker.
Step 4.
the ON position.
If the air conditioner will not operate in the
COOL position, check for defective compressor
circuit breaker.
Replace defective compressor circuit breaker per para. 4-34.
Step 5.
Check to see if mode selector is in the VENTILATE position.
Place mode selector in the VENTILATE position.
If the air conditioner will not operate, check for a defective switch.