Daikin VRVII Manual page 338

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Is the
outdoor (outside)
PCB replaced to spare
PCB ?
NO
The total of
indoor units
displaying "UA" and
indoor units connected
to the same refrigerant
system is within
connectable
number of
unit∗
YES
Press and hold the
RESET button on the
outside unit PCB for 5
seconds.
Does an
error occur?
YES
A
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
NO
NO
The refrigerant
classification has
not been set yet.
There are too
many indoor
units within the
same refrigerant
system.
Normal
333