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SERVICE PARTS INFORMATION 5
Indoor Unit Electronic Expansion Valve
(EEV)
Check Point 1 : Check Connections
Check Connectors
(Loose connector or open cable of CN14 for Duct type.)
Duct
Check Point 2 : Check Coil of EEV
Remove connector, check each winding resistance of Coil.
Read wire
Resistance value (20°C)
White - Red
Yellow - Brown
150 ± 10%
Orange - Red
Blue - Brown
If Resistance value is abnormal, replace EEV.
Check Point 5 : Check Opening and Closing Operation of Valve
When Valve is closed,
it has a temp. difference between Inlet and Outlet.
CLOSE
Example : Hot gas
Pipe (In)
Check Point 6 : Check Strainer
Strainer normally does not have temperature difference between inlet and outlet as shown in (1), but if there is a difference
as shown in (2), there is a possibility of inside clogged. In this case, replace Strainer.
(1)
Pipe (In)
Check Point 3 :
>> If an abnormal noise does not show, replace Controller PCB.
Check Point 4 :
>> If it does not appear, replace Controller PCB.
If it is open, it has no temp. difference between Inlet and Outlet.
Pipe (Out)
(2)
Pipe (Out)
06-92
Check Noise at start up
Turn on Power and check operation noise.
Check Voltage from Controller PCB
Remove Connector and check Voltage (DC12V).
12V
1
1
2
2
2
2
5
5
3
3
1
1
4
4
3
3
5
5
4
4
6
6
6
6
OPEN
Example : Hot gas
Pipe (In)
Pipe (In)
DC
Pipe (Out)
Pipe (Out)
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Troubleshooting
