Mitsubishi Electric PUHY-HP120TNU-A, Service Handbook

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[2-7 Example System with an MA Remote Controller ]
HWE18240_GB
chapter 2 -
15
2 Restrictions
(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
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)
Œ
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 remote controller instal-
lation manual.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
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).
Proce-
dures
Unit or controller
Address
setting
range
Setting method Notes
Factory
setting
1 Indoor unit Main
unit IC 01 to 50 Assign the smallest ad-
dress to the main unit in the
group. To perform a group opera-
tion of indoor units that
have different functions,
designate the indoor unit
in the group with the great-
est number of functions as
the main unit. 00
Sub unit Assign sequential numbers
starting with the address of
the main unit in the same
group +1. (Main unit ad-
dress +1, main unit ad-
dress +2, main unit
a3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning
an address to all indoor
units. None of these addresses
may overlap any of the in-
door unit addresses. 00
3 MA
remote con-
troller Main
remote
control-
ler MA No
settings re-
quired. - Main
Sub
remote
control-
ler MA Sub
remote
controller Settings to be made ac-
cording to the remote con-
troller function selection
4 Outdoor unit OC
OS1
OS2 51 to 100 Assign sequential address
to the outdoor units in the
same refrigerant circuit.
The outdoor units are auto-
matically designated as
OC, OS1, and OS2.(Note) To set the address to 100,
set the rotary switches to
50. 00