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SiBE12-908
Check
Service Diagnosis
180
3.14 Four Way Valve Performance Check
Check No.31
(R9462)
< Caution on resetting the power supply >
NO
S80 voltage at
DC 0 V with
outdoor unit on?
YES
Replace the outdoor unit
PCB.
∗
Be sure to wait for 30 sec. or more after turning off the power supply.
Turn off the power and turn it on
again.
NO
YES
YES
NO
Start the heating operation.
S80 voltage at DC 130-230
V for 3 sec. after
compressor starts, and
then at about DC 12 ~15V
after that? (Fig. 1)
Disconnect the four way valve coil
from the connector and check the
continuity.
Four way valve
coil resistance at
300 ~ 600
Ω
?
∗
Four way valve coil
Cooling / dry : No continuity
Heating : Continuity
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(Fig. 1)
Voltage at S80
DC180-280V
DC12~15V
3 sec.
Compressor
ON
Time