SiUS04-924_A Check
112 Service Diagnosis
5.4 Electronic Expansion Valve Check
Check No.12 Conduct the followings to check the electronic expansion valve (EV).
1. Check to see if the EV connector is correctly connected to the PCB.
2. Turn the power off and on again, and check to see if the EV generate latching sound.
3. If the EV does not generate latching sound in the above step 2, disconnect the connector and
check the continuity using a tester.
4. Check the continuity between the pins 1 - 6 and 3 - 6, and between the pins 2 - 5 and 4 - 5. If
there is no continuity between the pins, the EV coil is faulty.
5. If the continuity is confirmed in the above step 3, the outdoor unit PCB is faulty.
Note: Please note that the latching sound varies depending on the valve type.
Harness 6P
6P ConnectorS20
Check
5-2
5-4
6-1
6-3
1 2 3 4 5 6
(R14242)
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