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TM 5-4120-361-14
Table 4-2.
Note:
Before you use this table, be sure you have performed all applicable
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AIR CONDITIONER FAILS TO OPERATE
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Check to see if main power cable is connected.
Connect cable to power source.
Check to see if main power receptacle is defective.
Replace defective connector.
Check for loose electrical connections.
Tighten loose connections.
Check to see if mode selector rotary switch is
or is defective.
Turn selector to COOL or VENT.
Replace switch
(para 4-26).
improperly positioned
if defective
Check to see if control circuit breaker or compressor circuit
breaker is in OFF position or is defective.
Reset circuit breaker(s) or replace defective circuit breaker
(para 4-26).
Remove service valve access panel (figure 1-2) and check to see
if high pressure or low pressure switch has cutout.
Reset high pressure or low pressure cutout .
Note that time delay
relay starts compressor 30 seconds after reset.
Test control circuit transformer and rectifier for faulty
operation.
Replace defective transformer and/or rectifier (para 4-28 and
4-29).
Step 7.
2.
INSUFFICIENT COOLING
Step 1.
Check to see if the mode selector switch is improperly positioned.
Set switch to COOL.
Step 2.
Check to see if temperature selector control is improperly
positioned or is defective.
Adjust setting or replace switch (para 4-26).
4-9
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