Check the connection of connector CN 105
Check Point 3: Check Operation of 4 Way Valve
Heating OperationHeating Operation Cooling OperationCooling Operation
AC
AC
SOLENOID COIL
4WAY VALVE
SOLENOID COIL
4WAY VALVE
Check each piping temperature, and confirm the location of the valve by the temperature difference.
If the valve location is not proper, replace 4 way valve.
HOT GAS
HOT GAS
HOT GAS
HOT GAS
Check Point 4: Check Voltage from Controller PCB
ON
OFF
CN106
BLUE
SOLENOID COIL
4WV
BLUE
1 1
2 2
Check Point 1 : Check Circuit connection
Check Point 2 : Check Solenoid Coil
SERVICE PARTS INFORMATION 12
4-WAY VALVE
Remove CN6 from PCB and check the resistance value
of coil
Resistance Value
1.7K
If it is Open or abnormal resistance value, replace
Solenoid Coil
Remove connector and check the voltage (Rated AC voltage).
>> If the voltage does not appear, replace Controller PCB.
04-125
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