4-Way Valve - Fujitsu Airstage V-II Service Manual

SERVICE PARTS INFORMATION 18

4-WAY VALVE

Check Point 1 : Check Circuit connection
Check the connection of connector CN 105
SOLENOID COIL 4WV
Check Point 3: Check Operation of 4 Way Valve
Check each piping temperature, and confirm the location of the valve by the temperature difference.
Heating Operation Heating Operation
4WAY VALVE
ON
SOLENOID COIL
If the valve location is not proper, replace 4 way valve.
Check Point 4: Check Voltage of Solenoid Coil
If CN6 of Control PCB dose not Show 220V + 20 V during Heating
operation (Compressor is in operation), replace Control PCB.
BLUE
1 1
BLUE
2 2
HOT GAS
HOT GAS
SOLENOID COIL
AC
-
Check Point 2 : Check Solenoid Coil
Remove CN6 from PCB and check the resistance value
of coil
If it is Open or abnormal resistance value, replace
Solenoid Coil
Cooling Operation Cooling Operation
4WAY VALVE
OFF
HOT GAS
04-114
Resistance Value
1.5K
HOT GAS
AC