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SERVICE PARTS INFORMATION 8-1
Indoor Unit Electronic Expansion Valve
(EEV)
Check Point 1 : Check Connections
Check Connectors (Loose connector or open cable.)
Slim duct, High static pressure duct,
Outdoor air unit, Cassette, Wall mount,
Vertical air handler(it not have "BROWN wire".)
* DX-Kit : CN11
Floor/ Ceiling, Ceiling, Compact Wall mount
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
P
p i
e
I (
) n
Check Point 2 : Check Coil of EEV
Remove connector, check each winding resistance of Coil.
White - Red
Yellow - Brown
Orange - Red
Blue - Brown
If Resistance value is abnormal, replace EEV.
Check Point 3 : Check Noise at start up
Turn on Power and check operation noise.
>> If an abnormal noise does not show, replace Controller PCB.
Check Point 4 : Check Voltage from Controller PCB
Remove Connector and check Voltage (DC12V).
>> If it does not appear, replace Controller PCB.
If it is open,
it has no temp. difference between Inlet and Outlet.
OPEN
Example : Hot Gas
Pipe (In)
Pipe (Out)
(
) 2
P
p i
e
(
O
u
) t
04-119
Read wire
Resistance value 68 F(20 ° C)
200 ± 10%
P
p i
e
I (
) n
°
DC
Pipe (Out)
P
p i
e
(
O
u
) t
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Troubleshooting
