Si20-701_B
Troubleshooting by Remote Controller
428
Troubleshooting
Note:
∗
1 The number of indoor units that can be connected to
a single outdoor unit system depends on the model of
outdoor unit.
NO
NO
NO
YES
YES
NO
Is the
error code "
UA
"
displayed?
Is
the error
code "
UA
"
displayed for all
indoor units connected
to one and the
same
system?
The
total of
indoor units
displaying "
UA
" and
indoor units connected
to the same refrigerant
system is within
connectable
number of
unit
∗
1
Normal
(It is assumed
that the code is
displayed due to
temporary
external cause
(e.g. noises).
The number of
indoor units that
can be
connected to a
single outdoor
unit system is
excess of
allowable range.
Reset all power supplies
for indoor and outdoor
units connected to one
and the same system.
Is the
outdoor unit
PCB replaced to spare
PCB?
YES
YES
The setting after
replacing spare
PCB has not
been set yet.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
A
B
