Service Parts Information 3 : Outdoor Unit Electronic Expansion Valve (Eev) - Fujitsu Waterstage Comfort Series Maintenance Document

Split system single phase type
Check point 2 : check winding resistance
Check point 2 : check winding resistance
Check winding resistance on each terminal
Check winding resistance on each terminal
If the resistance value is 0Ω or infinite, replace compressor
If the resistance value is 0Ω or infinite, replace compressor.
Check point 3 : replace Main PCB
If check point 1 and 2 do not improve the symptom, replace Main PCB.

2 4 3 Service parts information 3 : Outdoor unit electronic expansion valve (EEV)

Check point 1 : Check connection
Check connection of connector
(Loose connector or open cable)
WO*A060LFCA
WOYA060LFCA
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
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
- 34 -
difference as shown in 2, there is a possibility of inside clogged In this case, replace stainer
EXPANSION VALVE
COIL
RED
BLUE
ORANGE
YELLOW
WHITE
Resistance value
46Ω +/- 4Ω
at 20°C
Pipe (Out)
Normal TEMP
Resistance value :
Resistance value :
- 0 805 Ω (at 20°C) for WO*A060/080LFCA
0.24 Ω (at 20°C) for single phase type
-
0.79 Ω (at 20°C) for 3-phase type
- 0 642 Ω (at 20°C) for WO*A100LFTA
-
WO*A080LFCA, WO*A100LFTA
WOYA080LFCA, WOYA100LFTA
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
WOYA060/080LFCA
WOYA100LFTA
EXPANSION VALVE
COIL
WHITE
YELLOW
ORANGE
BLUE
RED
Pipe (Out)
HI TEMP
Maintenance document "1792 - EN"