Fujitsu AUXB04GALH Service Manual page 198

SERVICE PARTS INFORMATION 18
4-WAY VALVE 1 (2) (3)
Check Point 1 : Check Circuit connection
Check the connection of connector CN105 (CN156,158)
4WV1
SOLENOID COIL
Check Point 3: Check Operation of 4 Way Valve
Check each piping temperature, and confirm the location of the valve by the temperature difference.
4WAY VALVE
HOT GAS
ON
SOLENOID COIL
If the valve location is not proper, replace 4 way valve.
Check Point 4: Check Voltage of Solenoid Coil
If CN105 (CN156,158) of Control PCB dose not Show (AC208- 230V) during Heating
operation (Compressor is in operation), replace Main PCB.
BLUE
1 1
BLUE
2 2
4WAY VALVE
OFF
HOT GAS
SOLENOID COIL
AC
-
Check Point 2 : Check Solenoid Coil
Remove CN105 (CN156,158) from PCB and
check the resistance value of coil
If it is Open or abnormal resistance value,
replace Solenoid Coil
HOT GAS
HOT GAS
04-122
Resistance Value
2.085k +10%
-
(4WV1, 4WV2)
1.725k +10%
-
(4WV3)
AC