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Troubleshooting by Error Codes
SiUS281811EA
284
Part 6 Service Diagnosis
4.53 Transmission Error between Indoor and Outdoor Units in
the Same System
Error Code
U9
Applicable
Models
All indoor units
All outdoor units
Method of Error
Detection
Error signal for the other indoor units is detected within the system by outdoor unit PCB.
Error Decision
Conditions
The error decision is made on any other indoor unit within the system concerned.
Supposed
Causes
Transmission error within or outside of other system
Defective electronic expansion valve in indoor unit of other system
Defective PCB of indoor unit in other system
Improper connection of transmission wiring between indoor and outdoor unit
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
The indoor 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.
Continue the operation.
NO
U9
has been
displayed for 2 minutes
or more.
NO
All the units are
indicating
U9
.
Turn ON all indoor units.
YES
YES
Содержание SkyAir RZR-TA Series
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Страница 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Страница 321: ...SiUS281811EA 315 Part 7 Appendix 1 Wiring Diagrams 316 1 1 Outdoor Unit 316 1 2 Indoor Unit 320 Part 7 Appendix...
Страница 322: ...Wiring Diagrams SiUS281811EA 316 Part 7 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RZR18 24TAVJU RZQ18 24TAVJU 3D115455...
Страница 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Страница 324: ...Wiring Diagrams SiUS281811EA 318 Part 7 Appendix RZR30 36 42 48TAVJU RZQ30 36 42 48TAVJU 3D115456...
Страница 325: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 319 RZR30 36 42 48TAVJUA RZQ30 36 42 48TAVJUA 3D124500...
Страница 326: ...Wiring Diagrams SiUS281811EA 320 Part 7 Appendix 1 2 Indoor Unit FCQ18 24 30 36 42 48TAVJU 3D115647A...
Страница 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Страница 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Страница 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...