Check
SiUS041829E
114
Part 6 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 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
5P Connector
Check
S20
5 - 1
5 - 2
5 - 3
5 - 4
1 2 3 4 5
(R23663)
Harness 5P
6P Connector
(5)
Check
S20
6 - 1
6 - 2
6 - 3
6 - 4
1 2 3 4 5 6
(R23593)
Summary of Contents for RX09RMVJU9
Page 17: ...SiUS041829E Part 2 Specifications 13 1 Specifications 14 Part 2 Specifications ...
Page 125: ...SiUS041829E Check Part 6 Service Diagnosis 121 18 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS041829E Check Part 6 Service Diagnosis 123 18 class R20704 W V U DC_P1 DC_N1 ...
Page 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E ...
