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Troubleshooting by Indication on the Remote Controller
Troubleshooting
204
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Reset all power supplies for
indoor and outdoor units
connected to one and the
same system.
Is the
UA
malfunction code "
"
displayed?
YES
Is the
malfunction code
UA
"
" displayed for all
indoor units connected to
one and the same
system?
NO
Is
the type of
refrigerant for the
UA
indoor units with "
"
displayed corresponding
to that for the
outdoor
units?
YES
The number of indoor units that can be connected to a single outdoor unit system depends on
the model of outdoor unit.
NO
YES
Is the outdoor
PC board replaced
to spare parts PC
board ?
NO
NO
The total
of indoor units
UA
displaying "
" and
indoor units connected to the
same refrigerant system is
within connectable
number of
unit∗
YES
Does the
refrigerant type of indoor
and outdoor unit
match?
YES
Is it a multi
outdoor unit connection
system?
YES
Is the
combination of master
unit and slave unit
correct?
YES
Normal
(It is assumed that the code is
displayed due to temporary
external cause (e.g. noises).
YES
The setting after replacing spare
PC board has not been set yet.
Please set as per page 102, 103.
Correct the combination of indoor
UA
units with "
" displayed.
NO
The number of indoor units that
can be connected to a single
outdoor unit system is excess of
allowable range.
Replace the indoor unit PC board.
NO
Matches the refrigerant type of
indoor and outdoor unit.
NO
Replace the outdoor unit main PC
board.
NO
Change to a correct combination.
Replace the outdoor unit main PC
board.
Troubleshooting
SiBE28-805

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Troubleshooting

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