Mitsubishi Electric R410A Service Handbook page 42

[2-7 Example System with an MA Remote Controller ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as 2-7-1
Shielded cable connection
Same as 2-7-1
2) Transmission line for centralized control
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
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor unit
2 LOSSNAY
3 MA
remote con-
troller
4 Outdoor unit
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
The outdoor units are designated as OC, OS1, and OS2 in the order of capacity from large to small (if two or more units have
the same capacity, in the order of address from small to large).
HWE14080
Address
setting
range
Main IC 01 to 50
unit
Sub unit
LC 01 to 50
Main MA No
remote settings re-
control- quired.
ler
Sub MA Sub
remote remote
control- controller
ler
OC 51 to 100
OS1
OS2
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 123)
5) Switch setting
Address setting is required as follows.
Setting method
Assign the smallest ad- To perform a group opera-
dress to the main unit in the tion of indoor units that
group. have different functions,
designate the indoor unit
Assign sequential numbers
in the group with the great-
starting with the address of
est number of functions as
the main unit in the same
the main unit.
group +1. (Main unit ad-
dress +1, main unit ad-
dress +2, main unit
address +3, etc.)
Assign an arbitrary but None of these addresses
unique address to each of may overlap any of the in-
these units after assigning door unit addresses.
an address to all indoor
units.
-
Settings to be made ac-
cording to the remote con-
troller function selection
Assign sequential address To set the address to 100,
to the outdoor units in the set the rotary switches to
same refrigerant circuit. 50.
The outdoor units are auto-
matically designated as
OC, OS1, and OS2.(Note)
- 33 - 33
Factory
Notes
setting
00
00
Main
00
GB