Check
SiUS071735EB
107
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
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)
Summary of Contents for FDMQ09RVJU
Page 12: ...SiUS071735EB 1 List of Functions Part 1 List of Functions 1 Functions 2 ...
Page 14: ...SiUS071735EB 3 Specifications Part 2 Specifications 1 Specifications 4 ...
Page 125: ...SiUS071735EB Check Service Diagnosis 114 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS071735EB Check Service Diagnosis 116 15 18 24 class R20704 W V U DC_P1 DC_N1 ...
