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SiUS091628EA Check
Service Diagnosis 102
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 step 2, disconnect the connector and check the
continuity using a multimeter.
4. Check the continuity between the pins 5 - 1, 5 - 2, 5 - 3, 5 - 4 (between the pins 6 - 1, 6 - 2, 6 - 3,
and 6 - 4 for the 6P connector 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 (main PCB) is faulty.
Harness 5P
6P Connector
(5)
Check S20
6 - 1
6 - 2
6 - 3
6 - 4
1 2 3 4 5 6
(R23593)
Harness 5P
5P Connector
Check S20
5 - 1
5 - 2
5 - 3
5 - 4
1 2 3 4 5
(R23663)