Service manual

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Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The outdoor unit PC board
indicated by the malfunction code
U9 is normal.
Check for the indoor unit of other
system, and then conduct
troubleshooting by diagnosis
according to the Malfunction
Code Flowchart.
Re-diagnose by display after
passage of 2 minutes or more.
Continue operation.
NO
“
U9” has been
displayed for 2 minutes or
more.
NO
All
the units are
indicating “
U9”.
Turn on all indoor units.
YES
YES