AirStage ARXB07LALH, Service Manual

Page: 156 / 207

SERVICE PARTS INFORMATION 9
Outdoor Unit Electronic Expansion Valve
(EEV1)
Check Point 2 : Check Coil of EEV1
Remove connector, check each winding resistance of Coil.
If Resistance value is abnormal, replace EEV.
Read wire
46 ± 4
Resistance value (20°C)
Check Point 1 : Check Connections
Check connection of connector (CN116)
(Loose connector or open cable)
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.
Pipe (In) Pipe (Out) Pipe (In) Pipe (Out)
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) (2)
Check Point 5 : Check Opening and Closing Operation of Valve
When Valve is closed,
it has a temp. difference between Inlet and Outlet.
If it is open, it has no temp. difference between Inlet and Outlet.
1
2
3
4
5
6 1
2
3
4
5
6
RED
BLUE
ORANGE
YELLOW
WHITE
EEV1
EEV2
C
N
11
7
C
N
11
6
1
2
3
4
5
6 1
2
3
4
5
6
RED
BLUE
ORANGE
YELLOW
WHITE
DC
04-93
Yellow - Red
Orange - Red
Blue - Red
White - Red
Pipe (In)
Pipe (Out)
CLOSE
Example :Liquid
Refrigerant
Pipe (In)
Pipe (Out)
OPEN
Example :Liquid
Refrigerant