Fujitsu ASU18RMLQ Service Instruction page 74

SERVICE PARTS INFORMATION 4
Outdoor unit Electronic Expansion Valve
( EEV )
Check Point 1 : Check Connections
Check connection of connector
( Loose connector or open cable )
AOU24RML
RED
1
BROWN
2
BLUE
3
CN27
ORANGE
4
YELLOW
5
WHITE
6
BLACK RED
1
1 1
WHITE BROWN
2
2 2
BLUE
WHITE
4 3
3
CN50
WHITE ORANGE
5 4 4
WHITE YELLOW
6 5 5
WHITE WHITE
7 6 6
WHITE
Check Point 2 : Check Coil of EEV
Remove connector, check each winding
resistance of Coil.
Read wire Resistance value
White - Red
Yellow - Brown
46
at 68°F(20°C)
Orange - Red
Blue - Brown
If Resistance value is abnormal, replace EEV.
AOU36RML
EXPANSION
VALVE COIL
CN27
E V
CN50
E V
CN51
CN52
4
02-48
EXPANSION
RED
VALVE COIL
1
BROWN
2
BLUE
3
E V
ORANGE
4
YELLOW
5
WHITE
6
BLACK RED
1 1 1
WHITE BROWN
2
2 2
WHITE
BLUE
3 3
4
E V
WHITE
ORANGE
4
5 4
WHITE YELLOW
6 5 5
WHITE WHITE
6 6
7
WHITE
BLACK RED
1 1
1
GREEN BROWN
3 2 2
GREEN BLUE
4 3 3
E V
GREEN ORANGE
5 4 4
GREEN
YELLOW
6 5 5
GREEN WHITE
6
7 6
GREEN
BLACK RED
1 1 1
BLUE BROWN
2 2 2
BLUE BLUE
5 3 3
E V
BLUE ORANGE
6 4 4
BLUE YELLOW
5
7 5
WHITE
BLUE
8 6 6
BLUE
Check Point 3 : Check Voltage from Main PCB.
Remove Connector and check Voltage (DC12V)
If it does not appear, replace Main PCB.
Check Point 4 : Check Noise at start up
Turn on Power and check operation noise.
If an abnormal noise does not show, replace Main PCB.
DC