SiUS341802E
Troubleshooting by Error Code
Service Diagnosis
280
2.69 System Not Set Yet
Error Code
UF
Applicable
Models
All indoor unit models
All outdoor unit models
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 and outdoor-outdoor
units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
Troubleshooting
Is
indoor-outdoor
and outdoor-outdoor unit
transmission wiring
normal?
Is
indoor-outdoor
and outdoor-outdoor unit
transmission wiring
normal?
Replace the indoor unit PCB.
Wiring check operation may
not have been carried out
successfully.
After fixing incorrect wiring,
press and hold the RESET
button on the outdoor unit
main PCB for 5 seconds.
∗
The unit will not run for up to
12 minutes.
YES
NO
YES
NO
NO
YES
Is the check
operation
carried out?
Open the stop valve.
YES
NO
Are the stop
valves opened?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for Aurora Series
Page 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Page 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Page 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Page 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Page 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...