System Not Set Yet - Daikin RXYQ-TA Series Service Manual

SiUS341615E

3.67 System not Set yet

UF
Error Code
Applicable
All indoor unit models
Models All outdoor unit 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
Service Diagnosis
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
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
and outdoor - outdoor unit
transmission wiring
normal?
YES
NO
Is
indoor-outdoor
NO
and outdoor-outdoor unit
transmission wiring
normal?
NO
NO
Troubleshooting by Error Code
Open the stop valve.
YES
Replace the indoor unit PCB.
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.
Wiring check operation may
not have been carried out
successfully.
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