2.4.3 Service Parts Information 3 : Outdoor - Fujitsu Waterstage WS G140DC6 Series Maintenance Document

Split system (Single phase and 3-phase type)
2.4.3 Service parts information 3 : Outdoor unit electronic expansion
valve (EEV, EEV(INJ))
Check point 1 : Check connection
Check connection of connector
(Loose connector or open cable)
Single phase :
3-phase :
Check point 2 : Check coil of EEV
Remove connector, check each winding resistance of
coil.
Read wire
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. (Add period)
difference between inlet and outlet.
CLOSE
Example : Hot gas
Pipe (In)
HI TEMP.
There is no refrigerant flow coming to EEV(INJ) while the liquid injection is inactive. Check whether the liquid
injection is active before executing check point 5 for EEV(INJ).
Check point 6 : Check stainer
Stainer normally does not have temperature difference between inlet and outlet as shown in 1, but if there is a
difference as shown in 2, there is a possibility of inside clogged. In this case, replace stainer.
Pipe (In)
38
EXPANSION VALVE
COIL
EXPANSION VALVE COIL
Resistance value
46Ω +/- 4Ω
at 20°C
Pipe (Out)
Normal TEMP.
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. (Add period) difference
between inlet and outlet.
OPEN
Example : Hot gas
Pipe (In)
HI TEMP.
Pipe (In)
EXPANSION
VALVE COIL
(INJ)
EXPANSION VALVE
COIL (INJ)
Pipe (Out)
HI TEMP.
Pipe (Out)
Maintenance Document 1544-1