SERVICE PARTS INFORMATION 3
Check Point 1 : Check Connections
Outdoor unit Electronic Expansion Valve
( EEV )
Check connection of connector
( Loose connector or open cable )
02-32
EXPANSION
VALVE COIL
CN40
RED
BROWN
BLUE
ORANGE
YELLOW
WHITE
1
2
3
4
5
6
1
2
3
4
5
6
EV
Check Point 5 : Check Opening and Closing operation of valve
Pipe (In)
Pipe (Out)
Pipe (In)
CLOSE
Example : Hot gas
OPEN
Example : Hot gas
Pipe (Out)
Pipe (In)
Pipe (Out)
Pipe (In)
Pipe (Out)
Check Point 6 : Check strainer
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.
Strainer normally does not have temperature difference between inlet and outlet as shown in ,
but if there is a difference as shown in , there is a possibility of inside clogged. In this case, replace Strainer.
Check Point 2 : Check Coil of EEV
Yellow - Brown
Orange - Red
Blue - Brown
White - Red
Read wire
46
4
Resistance value
Check Point 4 : Check voltage from Main PCB.
Check Point 3 : Check noise at start up
DC
at 20°C
Remove connector, check each winding
resistance of Coil.
If resistance value is abnormal, replace EEV.
Remove connector and check voltage (DC12V)
If it does not appear, replace Main PCB.
Turn on Power and check operation noise.
If an abnormal noise does not show, replace Main PCB.
12V
RED
BROWN
BLUE
ORANGE
YELLOW
WHITE
1
2
3
4
5
6
1
2
3
4
5
6
EV
CN40
AMP Air Conditioning
www.ampair.co.uk | [email protected]
