1
Indoor unit
2
LOSSNAY
3
MA remote
controller
Outdoor unit
4
Main unit
Sub unit
Main unit
BC Controller
(sub)
BC Controller
(main)
Sub unit
IC
LC
MA
OC
MA
01 ~ 50
01 ~ 50
Not required
52 ~ 100
51 ~ 100
Sub unit
Wiring method
•
Address setting method
a. Indoor/outdoor transmission line
Connection of shielded wire:
The same as 1. (1)
Connection of shielded wire
The same as 1. (4)
b. Centralized control transmission line
The same as 1. (4)
c. MA remote controller wiring
The same as 1. (1)
For 2-remote controller operation:
The same as 1. (1)
For indoor group operation:
The same as 1. (1)
d. LOSSNAY connection
The same as 1. (4)
e. Switch setting
Address setting is required as listed below.
Order
Unit or controller
Address
Setting method
Caution
Factory
setting range
setting
[Main unit +1, +2, +3, .... ]
5
Auxiliary
units
BS
BC
Set with main/sub selector switch.
–
00
00
Main
00
• Assign the smallest address
within the group to the indoor
unit to become the main unit.
• The address of the indoor unit
connected to the sub BC con-
troller must be larger than that
of the indoor unit connected to
the main BC controller.
• If applicable, set the sub BC
controllers in an R2 system in
the following order:
(1) Indoor unit to be connected
to the main BC controller
(2) Indoor unit to be connected
to No.1 sub BC controller
(3) Indoor unit to be connected
to No.2 sub BC controller
Set the address so that (1) < (2) < (3)
• To set the address to “100,”
set it to “50”.
• If the address of the heat
exchanger unit or main BC
controller overlaps with
the address of the outdoor
unit or the sub BC control-
ler, use an unused ad-
dress within the setting
range.
• The use of a sub BC con-
troller requires a main BC
controller.
• Using the system controller,
make the same indoor group
setting that was made with
the MA remote controller.
• Set the address not to be
overlapped with the indoor
unit address.
• R2 types require a branch
number setting.
Use the address that equals the
sum of the smallest indoor unit
address out of all the indoor
units that are connected to the
sub BC controller and 50.
The lowest address of indoor unit
within refrigerant 50
Outdoor unit a1
Set to the main unit address wit-
hin a same group in serial order
Connect terminals M1 and M2 of the indoor-outdoor transmission line terminal block (TB3) on the outdoor unit (OC)
to the terminals M1 and M2 of the indoor-outdoor transmission terminal block (TB02) of the main BC controller (BC)
and the sub BC controller (BS) and terminals M1 and M2 of the indoor-outdoor transmission terminal block (TB5) on
each indoor unit (IC).
❉
Make sure to use shielded wire.
Set any address after setting all
indoor units.
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