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54
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FILE NO. SVM-06027
9-5-6. Only 4-Way valve does not operate (During heating operation)
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION lamp blink?
See "Power can not be turned on".
Does the power turn on by
pushing the [START/STOP] button
of the remote control?
See "Power can not be turned on".
Is the voltage across the indoor terminal
(
2
-
3
) 220-240V?
Relays (RY04) or IC31
or IC30 is failure.
Replace the P.C.
board.
Is cable connection between indoor
and outdoor units correct?
Correct cabling between indoor
and outdoor units.
Is the voltage across the outdoor terminal
(
2
-
3
) 220-240V?
Cables between indoor
and outddor units are defective.
Is the wiring of solenoid coil for
4-way valve normal?
Solenoid coil is defective.
4-way valve is defective.
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Heat Pump Model
