Fujitsu AIRSTAGE V-II - Outdoor Unit Solenoid Valve; Protection Function

Check Point 1 : Check connections
Check connection of connector.
AJ*A72,90LALH
>> C106,C107,C108
AJ*A108LALH
>> C106,C107,C108,CN111
AJ*A126,144LALH
>> C106,C107,C108,CN110
(Loose connector or open cable)
Check Point 3 : Check Voltage from Controller PCB
Remove connector and check the voltage (AC220V).
>> If the voltage does not appear, replace Controller PCB.
Check Point 2 : Check Solenoid Coil
Remove connector and check if coil is open.
(Normal resistance value of each coil: 1495 ± 7% )
>> If Resistance value is abnormal, replace Solenoid Coil.
SERVICE PARTS INFORMATION 17
Outdoor Unit Solenoid Valve
(SV1,SV2,SV3,SV5,SV6)
Pipe (In)
Pipe (Out)
Pipe (In)
Pipe (Out)
AC AC
SOLENOIDE COIL SOLENOIDE COIL
Normal Operation
Pipe (In) TEMP. Hi,
Pipe (Out) TEMP.Normal
Protection Function
Pipe (In) TEMP. = Pipe (Out) TEMP.
Hi TEMP.
Normal TEMP.
Hi TEMP.
Hi TEMP.
OPENCLOSE
Check Point 4 : Check opening & closing operation of Valve
Depending on either during operation or protection control, check if Valve is operating normally.
(When Valve opens, there is no temperature difference between Inlet and Outlet.)
(1) (2)
If the valve closes by removing the connector of the valve
which does not close, it is considered to be Controller PCB
failure. Replace Controller PCB.
If it does not close by removing connector, there is a
possibility of (1) clogging by dirt, or (2) deformation by
the heat at the time of Solenoid Valve installation.
In this case, replace Solenoid Valve.
CN106 CN107
1
2
1
2
1
2
1
2
1
2
1
3
1
2
1
3
1
2
1
3
SV1
SV2
SV3
1
3
SV5
1
3
SV6
CN112CN108 CN109 CN110 CN111
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
AC
04-113