SERVICE PARTS INFORMATION 3
Outdoor unit Electronic Expansion Valve ( EEV )
Check Point 1 : Check Connections
Check connection of connector (CN40) ( Loose connector or open cable )
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| EXPANSION |
| 1 1 | RED | VALVE COIL |
| 2 2 | BLUE | EV |
CN40 | 3 3 | YELLOWORANGE | |
| 4 4 | WHITE |
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| 5 5 |
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Check Point 2 : Check Coil of EEV
Remove connector, check each winding resistance of Coil.
Read wire | Resistance value | ||||
White - Red |
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Yellow - Red | 46 | 4 |
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Orange - Red | at 20°C |
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Blue - Red |
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If Resistance value is abnormal, replace EEV.
Check Point 3 : Check Voltage from Main PCB. | DC |
Remove Connector and check Voltage (DC12V) | |
If it does not appear, replace Main PCB. |
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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.
Check Point 5 : Check Opening and Closing Operation of Valve
When Valve is closed,
it has a temp. difference between Inlet and Outlet.
If it is open,
it has no temp. difference between Inlet and Outlet.
CLOSE
Example : Hot Gas
Pipe (In)
Hi TEMP.
Pipe (Out)
Normal TEMP.
OPEN
Example : Hot Gas
Pipe (In)
Hi TEMP.
Pipe (Out)
Hi TEMP.
Check Point 6 : Check Strainer
Strainer normally does not have temperature difference between inlet and outlet as shown in 
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but if there is a difference as shown in 
, there is a possibility of inside clogged. In this case, replace Strainer.
Pipe (In) | Pipe (Out) | Pipe (In) | Pipe (Out) |
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