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Check SiUS091133
145 Service Diagnosis
5.6 FourWay Valve Performance Check
Check No.13
5.7 Inverter Units Refrigerant System Check
Check No.14
(R15737)
NO
YES
YES
NO
Turn the power off and then on
again.
Disconnect the four-way valve coil
from the connector 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 W?
S80 voltage at
220 - 240 VAC with
compressor on? (Fig.
1)
(R11904)
(Fig. 1)
Voltage at S80
220 - 240 VAC
Time
Compressor
ON
Refrigerant system check
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (U0).
(R15833)
YES
NO
Reconnect the thermistor.
Replace the refrigerant.
Is the
discharge pipe
thermistor disconnected
from the holder?
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