Daikin VRVII Manual page 337

Remote Controller Display
UA
Applicable Models
All indoor models
VRVII, II-S, -WII and -WIII Series
Method of Error Detection
Detect abnormalities in combination of indoor and
outdoor (outside) units and the remote controller using
the outdoor (outside) unit PCB.
Error Decision Conditions
When any of the followings is detected, failure is instantly
confirmed.
When there is a problem in the combination of the
indoor and outdoor (outside) units
When there is a problem in the combination of the
indoor unit and the remote controller
Supposed Causes
Excess of connected indoor units
Defective outdoor (outside) unit PCB
Mismatching of the refrigerant type of indoor and
outdoor (outside) unit.
Setting of outdoor (outside) unit PCB was not
conducted after replacing to spare PCB.
332
Troubleshooting by Indication on the Remote Controller