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Troubleshooting by Error Code
SiUS331708EA
239
Service Diagnosis
4.60 System Not Set
Error Code
UF
Applicable
Models
All indoor units
All outdoor units
Method of Error
Detection
On check operation, the number of indoor units in terms of transmission is not corresponding to that
of indoor units that have made changes in temperature.
Error Decision
Conditions
The error is determined as soon as the abnormality aforementioned is detected through checking
the system for any erroneous connection of units on the check operation.
Supposed
Causes
Improper connection of transmission wiring between indoor-outdoor units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
Troubleshooting
Caution
Is indoor-
outdoor unit
transmission wiring
normal?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
After fixing incorrect wiring,
press and hold the
RESET
(BS5)
button on the outdoor
unit PCB for 5 seconds.
∗
The unit will not run for up to
12 minutes.
YES
YES
NO
NO
Open the stop valves.
Replace the indoor unit PCB.
Normal
YES
NO
Are the stop valves
opened?
Is
UF
displayed again?
Perform the check operation
again and press
RETURN
(BS3)
button.
Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...