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SERVICE PARTS INFORMATION 10
Outdoor Unit Electronic Expansion Valve
(EEV2)
Check Point 1 : Check Connections
Check connection of connector (CN117)
(Loose connector or open cable)
Check Point 2 : Check Coil of EEV2
Remove connector, check each winding resistance of Coil.
Read wire
Resistance value (20°C)
White
- Red
Yellow - Red
Orange - Red
Blue
- Red
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 :Liquid
Refrigerant
Pipe (In)
Check Point 6 : Check Strainer
Strainer normally does not have temperature difference between i nlet and outlet as shown in (1), but if there is a difference
as shown in (2), there is a possibility of inside clogged. In th is case, replace Strainer.
(
) 1
P
p i
e
I (
) n
RED
1
1
2
2
BLUE
3
3
EEV1
ORANGE
4
4
YELLOW
5
5
WHITE
6
6
RED
1
1
2
2
BLUE
3
3
EEV2
ORANGE
4
4
YELLOW
5
5
WHITE
6
6
46 ± 4
Pipe (Out)
P
p i
e
(
O
u
) t
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.
If it is open, it has no temp. difference between Inlet and Outlet.
OPEN
Example :Liquid
Refrigerant
Pipe (In)
(
) 2
P
p i
e
I (
) n
04-123
DC
Pipe (Out)
P
p i
e
(
O
u
) t
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Troubleshooting
