Check
SiBE05-722EE
104
Service Diagnosis
5.4
Electronic Expansion Valve Check
Check No.12
Conduct the following to check the electronic expansion valve (EV).
1. Check if the EV connector is correctly connected to the PCB.
2. Turn the power off and on again, and check if the EV generates a latching sound.
3. If the EV does not generate a latching sound in the above step 2, disconnect the connector
and check the continuity using a multimeter.
4. Check the continuity between the pins 1 - 6, 3 - 6, 2 - 5, 4 - 5 (between the pins 1 - 6, 2 - 6, 3 - 6,
4 - 6 for the harness 5P models). If there is no continuity between the pins, the EV coil is faulty.
5. If the continuity is confirmed in step 3, the outdoor unit PCB is faulty
Harness 6P
6P Connector
Check
S20
1 - 6
3 - 6
2 - 5
4 - 5
1 2 3 4 5 6
(R16385)
Harness 5P
6P Connector
(5)
Check
S20
1 - 6
2 - 6
3 - 6
4 - 6
1 2 3 4 5 6
(R16386)
Harness 5P
5P Connector
Check
S20
1 - 5
2 - 5
3 - 5
4 - 5
1 2 3 4 5
(R20506)
