Daikin VRVII - Page 322

Troubleshooting by Indication on the Remote Controller
317
Troubleshooting
YES
NO
All the
units are
indicating “U9”.
Continue the
operation.
NO
“U9”
has been
displayed for 2
minutes or
more.
Re-diagnose by
display after
passage of 2
minutes or more.
YES
The outdoor unit
PCB indicated by
the error code
"U9" is normal.
Check for the
indoor unit of
other system,
and then conduct
troubleshooting
by diagnosis
according to the
Error Code
Flowchart.
Turn ON all indoor units.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.