System Not Set - Daikin RXSQ24TAVJU Service Manual

Troubleshooting by Error Code

4.60 System Not Set

UF
Error Code
Applicable
All indoor units
All outdoor units
Models
Method of Error On check operation, the number of indoor units in terms of transmission is not corresponding to that
Detection of indoor units that have made changes in temperature.
Error Decision The error is determined as soon as the abnormality aforementioned is detected through checking
Conditions the system for any erroneous connection of units on the check operation.
Supposed
Causes
Troubleshooting
239
Improper connection of transmission wiring between indoor-outdoor units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Are the stop valves
opened?
YES
Is indoor-
outdoor unit
transmission wiring
normal?
YES
Perform the check operation
again and press RETURN
(BS3) button.
Is UF displayed again?
YES
NO
NO
NO
SiUS331708EA
Open the stop valves.
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.
Normal
Replace the indoor unit PCB.
Service Diagnosis