Mitsubishi Electric PURY-P72 Service Handbook page 42
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Also See for PURY-P72:
- Service handbook (403 pages) ,
- Service handbook (404 pages) ,
- Service handbook (387 pages)
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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 out-
door units (OC) in different refrigerant circuits and on the OC
and OS (Note a) in the same refrigerant circuit.
If a power supply unit is not connected to the transmission
line for centralized control, replace the power jumper con-
nector on the control board from CN41 to CN40 on only one
of the outdoor units.
a) The outdoor units in the same refrigerant circuit are automat-
ically designated as OC and OS 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).
b) If TB7's on the outdoor units in the same refrigerant circuit
are not daisy-chained, connect the transmission line for the
central control system to TB7 of the OC. (Note a).To main-
tain the central control even during an OC failure or a power
failure, connect TB7 on OC and OS together. (If there is a
(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).
HWE09130
Address
setting
Setting method
range
Assign the smallest address to the main
IC
01 to 50
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
Assign sequential address to the outdoor
OC
51 to 100
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
- 33 -
33
problem with the outdoor unit whose power jumper was
moved from CN41 to CN40, central control is not possible,
even if TB7's are daisy-chained.)
Only use shielded cables.
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 shield-
ed cable. Short-circuit the earth terminal (
minal 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 system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
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 the S ter-
Fac-
tory
Notes
set-
ting
00
00
Main
00
GB
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