Fujitsu ASU7RLF1 Service Instructions Manual page 79

Check Point 2 : Check Coil of EEV
Remove connector, check each winding
resistance of Coil.
Read wire
White - Red
Yellow - Brown
46
Orange - Red
Blue - Brown
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 inlet and outlet as shown in
but if there is a difference as shown in
Pipe (In)
Resistance value
4
at 68°F(20°C)
Pipe (Out)
Normal TEMP.
, there is a possibility of inside clogged. In this case, replace Strainer.
Pipe (Out)
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.
If it is open,
it has no temp. difference between Inlet and Outlet.
OPEN
Example : Hot Gas
Pipe (In)
Hi TEMP.
Pipe (In)
02-47
DC
Pipe (Out)
Hi TEMP.
,
Pipe (Out)