Check Si12-411A
208 Service Diagnosis
6.1.4 Four Way Valve Performance Check
Check No.5
Turn off the power and turn it on
again.
Start the heating-mode run.
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R2856)
NO
∗ Four way valve coil
Cooling / dry : No continuity
Heating : Continuity
YES
YES
Four way valve
coil resistance at
1500 ohms?
NO
S80 voltage
at DC 180-220 V with
compressor on?
(Fig. 1)
Disconnect the four way valve coil
from the connector and check the
continuity.
(Fig. 1)
Voltage at S80
DC180-220V
ON
Compressor
Time
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