Outdoor Unit Electronic Expansion Valve - Fujitsu Airstage V-II Service Manual

SERVICE PARTS INFORMATION 15

Outdoor Unit Electronic Expansion Valve

(EEV1)
Check Point 1 : Check Connections
Check connection of connector (CN116)
(Loose connector or open cable)
Check Point 2 : Check Coil of EEV1
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 : Hot GAS
Pipe (In)
Hi TEMP.
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)
Pipe (In)
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)
Normal TEMP.
Pipe (Out)
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 : Hot GAS
Pipe (In)
Hi TEMP.
(2)
Pipe (In)
04-111
DC
Pipe (Out)
Hi TEMP.
Pipe (Out)