SiUS341802E
Troubleshooting by Error Code
Service Diagnosis
270
2.64 Transmission Error between Indoor and Outdoor Units in
the Same System
Error Code
U9
Applicable
Models
All indoor unit models
All outdoor unit models
Method of Error
Detection
Detect the error signal for the other indoor unit within the circuit by outdoor unit PCB.
Error Decision
Conditions
When the error decision is made on any other indoor unit within the system concerned
Supposed
Causes
Transmission error between other indoor and outdoor units
Defective electronic expansion valve of other indoor unit
Defective indoor unit PCB of other indoor unit
Improper connection of transmission wiring between indoor and outdoor unit
Troubleshooting
U9
has
been displayed for 2
minutes or more.
The outdoor unit PCB indicated
by the error code
U9
is normal.
Check for the indoor unit of other
system, and then conduct
troubleshooting by diagnosis
according to the Error Code
Flowchart.
Re-diagnose by display after
passage of 2 minutes or more.
NO
Turn ON all indoor units.
YES
YES
Continue the operation.
NO
All the units are
display
U9
.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Содержание Aurora Series
Страница 316: ...Wiring Diagrams SiUS341802E 303 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RXLQ72TATJU 2D112580A ...
Страница 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Страница 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Страница 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Страница 320: ...Wiring Diagrams SiUS341802E 307 Appendix RXLQ72 96 120TAYCU RXYQ72 96 120 144 168TAYCU 2D112579A ...
Страница 330: ...Wiring Diagrams SiUS341802E 317 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C ...
Страница 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Страница 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...