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.
(V2827)
The
total of indoor
units displaying "UA"
and indoor units connected
to the same refrigerant system
is within connectable
number of unit∗
Normal
NO
NO
There are too many indoor units
within the same refrigerant
system.
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds.
YES
Is the outdoor P.C.
board replaced to spare
parts P.C. board ?
YES
The refrigerant classification has
not been set yet. Please set as per
page 117.
NO
YES
Does a malfunction occur?
Replace outdoor unit PC board
(A1P).
Matches the refrigerant type of
indoor and outdoor unit.
NO
YES
Does the refrigerant type
of indoor and outdoor
unit match?