Four Way Valve Performance Check; Inverter Unit Refrigerant System Check - Daikin SUPER MULTI NX CTXS07JVJU Service Manual

Check
7.6

Four Way Valve Performance Check

Check No.13
7.7

Inverter Unit Refrigerant System Check

Check No.14
195
Turn off the power and turn it on
again.
Start heating operation.
S80 voltage at
208/230 VAC with
compressor on? (Fig.
1)
YES
Disconnect the connector for the
four way valve coil and check the
continuity.
Four-way valve
coil resistance at 1000~2000 W?
YES
(Fig. 1)
Voltage at S80
208/230 VAC
Compressor
ON
Refrigerant system check
Is the discharge pipe
thermistor disconnected from
the holder?
NO
Check for refrigerant leakage.
See the section on refrigerant
shortage detection.
* Four-way valve coil
Cooling / dry : No continuity
Heating : Continuity
NO
NO
Time
YES
SiUS12-928_B
Replace the outdoor unit
PCB.
Replace the four-way valve
coil.
Replace the four-way valve.
(R11725)
(R11717)
Reconnect the thermistor.
Replace the refrigerant.
(R15833)
Service Diagnosis