System Not Set - Daikin SkyAir RZR-TA Series Service Manual

Troubleshooting by Error Codes

4.58 System Not Set

UF
Error Code
Applicable All indoor units
Models All outdoor units
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
 Improper connection of transmission wiring between indoor-outdoor units
Causes  Failure to execute check operation
 Defective indoor unit PCB
 Stop valve is not opened
Troubleshooting
290
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 the check
operation carried
out?
YES
Is
indoor-outdoor unit
transmission wiring
normal?
YES
Perform test operation again and
press RETURN (BS3) button.
Are there any other
errors?
YES
NO
Is
NO indoor-outdoor unit
transmission wiring
normal?
NO
NO
NO
SiUS281811EA
Open stop valve.
YES
Press RETURN (BS3) button
on outdoor unit PCB for 5
seconds or longer.
∗ No operation for max. 12
minutes.
After fixing incorrect wiring,
press and hold the RETURN
(BS3) button on the master
outdoor unit PCB for 5
seconds.
∗ The unit will not run for up to
12 minutes.
Normal
Replace the indoor unit PCB.
Part 6 Service Diagnosis