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SERVICE PARTS INFORMATION 11
Outdoor Unit Solenoid Valve
(SV2)
Check Point 1 : Check connections
Check connection of connector.
(Loose connector or open cable)
AJ*A36, 45, 54LALH
>> CN107
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.)
Normal Operation
Pipe (In) TEMP. Hi,
Pipe (Out) TEMP.Normal
Pipe (In)
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.
BLUE
1
1
SV2
BLUE
2
2
CLOSE
Pipe (Out)
SOLENOIDE COIL
AC
(1)
04-95
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.
Check Point 3 : Check Voltage from Controller PCB
Remove connector and check the voltage (Rated AC voltage).
>> If the voltage does not appear, replace Controller PCB.
Protection Function
Pipe (In) TEMP. = Pipe (Out) TEMP.
Pipe (In)
SOLENOIDE COIL
)
OPEN
Pipe (Out)
AC
(2)
AC
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Troubleshooting
