Service manual

SiUS041111 Check
Service Diagnosis 119
5.5 Four-Way Valve Performance Check
Check No.13
5.6 Inverter Unit Refrigerant System Check
Check No.14
(R14673)
NO
YES
YES
NO
* Four-way valve coil
Cooling / Dry : No continuity
Heating : Continuity
Turn off the power and turn it on
again.
Start heating operation.
Disconnect the four-way valve coil
from the connector and check the
continuity.
Four-way valve
coil resistance at 1000 ~
2000 W?
S80 voltage at
208 - 230 VAC with
compressor on? (Fig.
1)
Replace the outdoor unit
PCB.
Replace the four-way valve
coil.
Replace the four-way valve.
(R14674)
(Fig. 1)
Compressor
ON
Voltage at S80
208 - 230 VAC
Time
Refrigerant system check
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (U0).
(R8259)
YES
NO
Place the thermistor.
Replace the refrigerant.
Is the discharge pipe
thermistor disconnected
from the holder?