Carrier 42NQ012N Service Manual page 48

9-5-3. Outdoor unit does not operate
Shut off the power supply
from AC outlet once and turn
it on after 5 seconds.
Does the OPERATION lamp blink?
YES
Does the power turn on by pushing
the [ ] button of the
remote control?
YES
Is AC 220-240V supplied between
terminal block 1 - 2 ?
YES
Is cable connection between indoor
and outdoor units correct?
YES
Check items as following procedure
in 9-5-4, 9-5-5, 9-5-6
NO
See "Power can not be turned on".
NO
See "Power can not be turned on".
NO
Relays (RY01) or (Q07) or IC30 is failure.
NO
Correct cabling between indoor
and outdoor units.
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47
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FILE NO. SVM-10031
Replace the
P.C. board.