Mitsubishi Electric PURY-P120Y(T)HMU-A, Service Handbook

Page: 48 / 387

[
II
Restrictions ]
39 - 39 - HWE0803A GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 3.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Same as [5] 4.
Shielded cable connection
Same as [5] 4.
3) M-NET remote controller wiring
M-NET remote controller is connectable anywhere on
the indoor-outdoor transmission line.
When 2 remote controllers are connected to the sys-
tem
Refer to the section on Switch Setting.
Performing a group operation (including the group
operation of units in different refrigerant circuits).
Refer to the section on Switch Setting.
4) LOSSNAY connection
Same as [5] 4.
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 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).
Proce-
dures
Unit or controller
Ad-
dress
setting
range
Setting method Notes
Fac-
tory
set-
ting
1 Indoor
unit Main unit IC 01 to
50 Œ
Assign the smallest address to the main unit
in the group.
ΠIn a system with a sub BC controller, make
the settings for the indoor units in the fol-
lowing 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.
ΠPort number setting is
required
ΠTo perform a group op-
eration of indoor units
that have different func-
tions, set the indoor unit
in the group with the
greatest 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 a1, main unit address
+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 indoor unit
addresses. 00
3 M-NET
remote
controller Main
remote con-
troller RC 101 to
150 Add 100 to the main unit address in
the group ΠIt is not necessary to set the
100s digit.
ΠTo set the address to 200,
set the rotary switches to 00.
101
Sub
remote con-
troller RC 151 to
200 Add 150 to the main unit address in
the group
4 Outdoor unit OC
OS 51 to 100
Œ
Assign sequential address to the outdoor
units in the same refrigerant circuit.
ΠThe outdoor units are automatically desig-
nated as OC and OS.(Note)
Œ
To set the address to 100,
set the rotary switches to 50.
ΠIf the addresses that is as-
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.
ΠThe use of a sub BC control-
ler requires the connection
of a main BC controller.
00
5 Auxiliary
outdoor
unit BCcon-
troller (Sub) 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 control-
ler (Main) BC OC (or OS if it exists) +1