Table of Contents
[2-7 Example System with an MA Remote Controller ]
(4) Wiring method
1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 of the terminal block
for indoor-outdoor transmission line (TB3) on the outdoor
units (OC and OS), of the terminal block for indoor-out-
door transmission line (TB02) on the main and sub BC
controllers (BC and BS), and of the terminal block for in-
door-outdoor transmission line (TB5) on each indoor unit
(IC). (Non-polarized two-wire)
Only use shielded cables.
The outdoor units in the same refrigerant circuit are au-
tomatically designated as OC and OS in the order of ca-
pacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).
Shielded cable connection
Daisy-chain the ground terminal (
units (OC and OS), the S terminal of the terminal block
(TB02) on BC and BS, and the S terminal of the terminal
block (TB5) on the indoor unit (IC) with the shield of the
shielded cable.
2) Transmission line for centralized control
(5) Address setting method
Proce-
Unit or controller
dures
1
Indoor
Main unit
unit
Sub unit
2
LOSSNAY
3
MA
Main
remote
remote
controller
controller
Sub
remote
controller
4
Outdoor unit
5
Auxiliary
BCcon-
troller (Sub)
outdoor
unit
BC control-
ler (Main)
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
HWE1314A
) on the outdoor
Address
setting
range
IC
01 to 50
Assign the smallest address to the main
unit in the group.
In a system with a sub BC controller,
make the settings for the indoor units in
the following order.
(i) Indoor unit to be connected to the main
BC controller
(ii) Indoor unit to be connected to sub BC
controller 1
(iii) Indoor unit to be connected to sub BC
controller 2
Make the settings for the indoor units in
the way that the formula "(i) < (ii) < (iii)"
is true.
Assign sequential numbers starting with
the address of the main unit in the same
group +1. (Main unit address +1, main unit
address +2, main unit address +3, etc.)
LC
01 to 50
Assign an arbitrary but unique address to
each of these units after assigning an ad-
dress to all indoor units.
MA
No set-
tings re-
quired.
MA
Sub
Settings to be made with the Sub/
remote
Main switch
controller
OC
51 to 100
Assign sequential address to the outdoor
units in the same refrigerant circuit.
OS
The outdoor units are automatically des-
ignated as OC and OS.(Note)
BS
51 to 100
Assign an address that equals the sum of
the smallest address of the indoor units
that are connected to the sub BC controller
and 50.
BC
OC (or OS if it exists) +1
- 37 -
37
No connection is required.
3) MA remote controller wiring
Same as 2-7-1
When 2 remote controllers are connected to the sys-
tem
Same as 2-7-1
Group operation of indoor units
Same as 2-7-1
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
Interlock setting between the indoor units and LOSS-
NAY units must be entered on the remote controller. For
information about how to interlock the operation of indoor
and LOSSNAY units, refer to the following page(s) in this
Service Handbook.
[6-5 Making Interlock Settings from an MA Remote Con-
troller](page 169)
5) Switch setting
Address setting is required as follows.
Setting method
Port number setting is
To perform a group op-
None of these addresses may
overlap any of the indoor unit
addresses.
-
To set the address to 100,
If the addresses that is as-
The use of a sub BC control-
Fac-
tory
Notes
set-
ting
00
required
eration of indoor units
that feature different
functions, designate
the indoor unit in the
group with the greatest
number of functions as
the main unit.
00
Main
00
set the rotary switches to 50.
signed to the main BC con-
troller overlaps any of the
addresses that are assigned
to the outdoor units or to the
sub BC controller, use a dif-
ferent, unused address with-
in the setting range.
ler requires the connection
of a main BC controller.
GB
Chapters
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