Specifications

Check SiUS12-928_A
151 Service Diagnosis
6.1.3 Four-Way Valve Performance Check
Check No.05
(R11717)
(R11725)
NO
YES
YES
NO
(Fig. 1)
Voltage at S80
208/230 VAC
ON
Compressor
Time
Turn off the power and turn it on
again.
Disconnect the connector for the
four way valve coil and check the
continuity.
Start heating operation.
∗ 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.
Four way
valve coil resistance at
1000 ~ 2000 Ω?
S80
voltage at 208/230
VAC with compressor
on? (Fig. 1)