Fujitsu AUXB04GALH Service Manual page 193

SERVICE PARTS INFORMATION 14
Outdoor Unit Electronic Expansion Valve
(EEV1)
Check Point 1 : Check Connections
Check connection of connector (CN116)
(Loose connector or open cable)
Check Point 2 : Check Coil of EEV1
Remove connector, check each winding resistance of Coil.
Resistance value 68 F(20 ° C)
Read wire
White - Red
Yellow - Red
Orange - Red
Blue - Red
If Resistance value is abnormal, replace EEV1.
Check Point 5 : Check Opening and Closing Operation of Valve
Note : Check the EEV1 in the state of 4-way1 valve is ON.
When EEV1 is closed,
it has no temp. difference between Inlet and Outlet.
CLOSE
Pipe (In)
In the following cases, even if EEV1 is closed, there may be a difference in temp.
- On comp. start-up
- Just after swiching the 4-way valve1
- Just after swiching the EEV1 (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
°
46 ± 4
Pipe (Out)
Pipe (Out)
CN117 CN160
Check Point 3 : Check Noise at start up
Turn on Power and check operation noise.
>> If an abnormal noise does not show, replace Controller PCB.
Check Point 4 : Check Voltage from Controller PCB
Remove Connector and check Voltage (DC12V).
>> If it does not appear, replace Controller PCB.
12V
If it is open, it has a temp. difference between Inlet and Outlet.
Outlet temp. is near Low-pressure saturated temp.
OPEN
Pipe (In)
(2)
Pipe (In)
04-117
Pipe (Out)
Note
If valve opening is 12~51pls,
the check of temp. cannot be performed.
Check temp. at the other valve opening.
Pipe (Out)
DC