SiBE121021_C
Check
Service Diagnosis
365
8.6
Four Way Valve Performance Check
Check No.13
8.7
Inverter Unit Refrigerant System Check
Check No.14
(R11903)
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.
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
Disconnect the four way valve coil
from the connector and check the
continuity.
S80 voltage at 220 - 240
VAC with compressor
on? (Fig. 1)
Four way valve
coil resistance at
1000 ~ 2000
Ω
?
(R11904)
(Fig. 1)
Voltage at S80
220 - 240 VAC
Time
Compressor
ON
Refrigerant system check
Is the discharge pipe
thermistor disconnected from
the holder?
Check for refrigerant leakage.
See the section on refrigerant
shortage detection.
(R8380)
YES
NO
Place the thermistor.
Replace the refrigerant.
