SiUS371901E
Troubleshooting by Error Code
Service Diagnosis
310
3.42 Branch Selector Unit Electronic Expansion Valve
Abnormality
Error Code
F9
Applicable
Models
Branch Selector unit
Method of Error
Detection
The error is detected by whether or not all coils of the electronic expansion valve have continuity.
Error Decision
Conditions
The power supply turns ON, but there is no currents pass through the common (COM[+]).
Supposed
Causes
Disconnection of the electronic expansion valve connector
Defective electronic expansion valve coil
Defective PCB of Branch Selector unit
Troubleshooting
Note:
∗
1: Use the sub code to identify the electronic expansion valve subject to error code
F9
.
While in monitor mode,
identify an electronic
expansion valve subject to
the Error Code
F9
. (
∗
1)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
Return to normal?
Turn power supply OFF, and
turn power supply ON again.
Replace the electronic
expansion valve coil.
Replace the Branch
Selector unit PCB.
YES
YES
NO
Ensure the correct
connection.
External factor other than
error (for example, noise
etc.).
NO
NO
The connector
of outdoor unit main PCB
for electronic expansion
valve is connected.
The coil
resistance of electronic
expansion valve is normal.
CHECK 18
Electronic expansion valve
Sub code
Electronic expansion valve (high/low pressure gas pipe)
01
Electronic expansion valve (suction pipe)
02
Electronic expansion valve (subcooling)
05
CHECK 18
Summary of Contents for REYQ-XA
Page 1: ...Service Manual SiUS371901E REYQ72 456XATJU REYQ72 456XAYDU REYQ72 432XAYCU Heat Recovery 60 Hz...
Page 415: ...SiUS371901E Wiring Diagrams Appendix 402 REYQ144 168XATJU 2D119206A...
Page 416: ...Wiring Diagrams SiUS371901E 403 Appendix REYQ72 96 120XAYDU 2D119207B...
Page 417: ...SiUS371901E Wiring Diagrams Appendix 404 REYQ144 168XAYDU 2D119208B...
Page 418: ...Wiring Diagrams SiUS371901E 405 Appendix REYQ72 96 120 144 168XAYCU 2D119209A...
Page 421: ...SiUS371901E Wiring Diagrams Appendix 408 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 423: ...SiUS371901E Wiring Diagrams Appendix 410 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 425: ...SiUS371901E Wiring Diagrams Appendix 412 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...
Page 426: ...Wiring Diagrams SiUS371901E 413 Appendix FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 428: ...Wiring Diagrams SiUS371901E 415 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 429: ...SiUS371901E Wiring Diagrams Appendix 416 FXAQ07 09 12 18 24PVJU C 3D075354D...
Page 435: ...SiUS371901E Wiring Diagrams Appendix 422 VAM1200GVJU 3D073270D...
Page 437: ...SiUS371901E Wiring Diagrams Appendix 424 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...
Page 438: ...Wiring Diagrams SiUS371901E 425 Appendix BS6 8Q54TVJ 2D089122B...
Page 439: ...SiUS371901E Wiring Diagrams Appendix 426 BS10 12Q54TVJ 2D089121B...
Page 440: ...Revision History Month Year Version Revised contents 04 2019 SiUS371901E First edition...
