SERVICE PARTS INFORMATION 14
Indoor Unit Electronic Expansion Valve
(EEV)
Check Point 2 : Check Coil of EEV
Remove connector, check each winding resistance of Coil.
If Resistance value is abnormal, replace EEV.
Read wire
200 ± 10%
Resistance value 68 F(20
°
C)
Check Point 1 : Check Connections
Check Connectors (Loose connector or open cable.)
Duct, Cassette, Wall mount
Floor/ Ceiling, Ceiling, Small Wall mount
Check Point 3 : Check Voltage from Controller PCB
Remove Connector and check Voltage (DC12V).
>> If it does not appear, replace Controller PCB.
Check Point 4 : Check Noise at start up
Turn on Power and check operation noise.
>> If an abnormal noise does not show, replace Controller PCB.
DC
White - Red
Orange - Red
Yellow - Brown
Blue - Brown
CN10CN10
Check Point 5 : Check Opening and Closing Operation of Valve
When Valve is closed,
it has a temp. difference between Inlet and Outlet.
Pipe (In) Pipe (Out)Pipe (In) Pipe (Out)
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) (2)
If it is open,
it has no temp. difference between Inlet and Outlet.
Pipe (In)
Pipe (Out)
CLOSE
Example : Hot Gas
Pipe (In)
Pipe (Out)
OPEN
Example : Hot Gas
04-107
°
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