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Mitsubishi Electric PURY-P72 Service Handbook page 40

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[ II Restrictions ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 2.
Shielded cable connection
Same as [5] 2.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block
for transmission line for centralized control (TB7) on the
outdoor units (OC) in different refrigerant circuits and on
the OC and OS in the same refrigerant circuit
If a power supply unit is not connected to the transmis-
sion line for centralized control, replace the power jump-
er connector on the control board from CN41 to CN40 on
only one of the outdoor units.
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).
Only use shielded cables.
(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).
HWE0803A
Address
setting
Setting method
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
- 31 -
31
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC, OS) with the shield wire of the
shielded cable. Short-circuit the earth terminal (
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the sys-
tem
Same as [5] 1.
Group operation of indoor units
Same as [5] 2.
4) LOSSNAY connection
Same as [5] 2.
5) Switch setting
Address setting is required as follows.
Port number setting is
required
To perform a group op-
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.
None of these addresses may
overlap any of the indoor unit
addresses.
-
To set the address to 100,
set the rotary switches to 50.
If 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.
The use of a sub BC control-
ler requires the connection
of a main BC controller.
) and
Fac-
tory
Notes
set-
ting
00
00
Main
00
GB
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