Electronic Expansion Valve (Eev) - Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document

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Split system single phase type
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*A060LDC
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
difference as shown in 2, there is a possibility of inside clogged. In this case, replace stainer.
Pipe (In)
34
EXPANSION VALVE
COIL
Resistance value
46Ω +/- 4Ω
at 20°C
Pipe (Out)
Normal TEMP.
Pipe (Out)
WO*A080LDC, WO*A100LDT
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
Pipe (Out)
HI TEMP.
Pipe (Out)
Maintenance Document 1589-3

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This manual is also suitable for:

Waterstage ws a100dd6 seriesWaterstage wg a050dd6 seriesWaterstage wg a100dd6 seriesWaterstage wo a060ldc seriesWaterstage wo a080ldc seriesWaterstage wo a100ldt series

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