Daikin CTXS09GVJU Service Manual page 173

Check
6.1.3 Four-Way Valve Performance Check
Check No.05
160
Turn off the power and turn it on
again.
Start the heating-mode run.
S80 voltage at
AC 220-240 V with
compressor on? (Fig.
1)
YES
Disconnect the four-way valve coil
from the connector and check the
continuity.
Four-way valve
coil resistance at 1500 ohms?
YES
(Fig. 1)
Voltage at S80
AC220-240V
Compressor
ON
* Four-way valve coil
Cooling / Dry : No continuity
Heating : Continuity
NO
NO
Time
SiUS12-814
Replace the outdoor unit
PCB.
Replace the four-way valve
coil.
Replace the four-way valve.
(R8378)
Service Diagnosis