Fujitsu AUXB04GALH Service Manual page 194

SERVICE PARTS INFORMATION 15
Outdoor Unit Electronic Expansion Valve
(EEV2)
Check Point 1 : Check Connections
Check connection of connector (CN117)
(Loose connector or open cable)
Check Point 2 : Check Coil of EEV2
Remove connector, check each winding resistance of Coil.
Read wire Resistance value 68°F(20°C)
White - Red
Yellow - Red
46 ± 4
Orange - Red
Blue - Red
If Resistance value is abnormal, replace EEV2.
Check Point 5 : Check Opening and Closing Operation of Valve
Note : Check the EEV2 in the state of 4-way valve2 is ON.
When EEV2 is closed,
it has no temp. difference between Inlet and Outlet.
CLOSE
Pipe (In)
In the following cases, even if EEV2 is closed, there may be a difference in temp.
- On comp. start-up
- Just after swiching the 4-way valve2
- Just after swiching the EEV2 (Open --> Close)
Check Point 6 : Check Strainer
Strainer 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 Strainer.
(1)
Pipe (In)
CN116 CN117
Check Point 3 : Check Noise at start up
>> If an abnormal noise does not show, replace Controller PCB.
Check Point 4 : Check Voltage from Controller PCB
>> If it does not appear, replace Controller PCB.
If it is open, it has a temp. difference between Inlet and Outlet.
Outlet temp. is near Low-pressure saturated temp.
OPEN
Pipe (In)
Pipe (Out)
(2)
Pipe (Out)
04-118
CN160
Turn on Power and check operation noise.
Remove Connector and check Voltage (DC12V).
12V
Note
If valve opening is 12~51pls,
the check of temp. cannot be performed.
Check temp. at the other valve opening.
Pipe (In)
DC
Pipe (Out)
Pipe (Out)