Mitsubishi Electric PURY-P72 Service Handbook page 47

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[II Restrictions)
(4)
Wiring method
1)
Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 of the terminal block for indoor-
outdoor transmission line (TB3) on the outdoor unijs (OC and OS),
of the terminal block for indoor-outdoor transmission line (TB02) on
the main and sub BC controllers (BC and BS), and of the terminal
block for indoor-outdoor transmission line (TB5) on each indoor unit
(IC). (Non-polarized two-wire)
Shielded cable connection
Daisy-chain the ground terminal (rh) on the outdoor units (OC and
OS), the S terminal of the terminal block (TB02) on the BC (BS), and
the S terminal of the terminal block (TB5) on the indoor unit (IC) with
the shield of the shielded cable.
Note
I
The outdoor units in the same refrigerant circuit are auto-
matically designated as OC,
051,
and
052
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).
-Only use shielded cables.
2) Transmission line for centralized control
Daisy-chain terminals A and B on the terminal block for transmission
line for centralized control (TB7) on the outdoor units (OC) in differ-
ent refrigerant circuits and on the OC and OS in the same refrigerant
circuit.
If a power supply unit is not connected to the transmission line for
centralized control, replace the power jumper connector on the con-
trol board from CN41 to CN40 on only one of the outdoor unijs.
Set the central control switch (SW2-1) on the control board of all out-
(5)
Address setting method
door units to "ON."
-Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal of the terminal block (TB7) on the system
controller,
ac,
and OS with the shield of the shielded cable. Short-
circuij the earth terminal (
rh )
and the S terminal on the terminal
block (TB7) on the outdoor unit whose power jumper connector is
mated wijh 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
Connect terminals M1 and M2 on the terminal block (TB5) on the in-
door unit (IC) to the appropriate terminals on the terminal block for
indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
-Indoor units must be interlocked with the LOSSNAY unit us-
ing the system controller. (Refer to the operation manual for
the system controller for the setting method.) Interlock set-
ting from the remote controller is required if the ON/OFF re-
mote controller alone or the LM adapter alone is connected.
5) Switch setting
Address setting is required as follows.
Pro
Address
Fact
ce-
Unit or controller setting Setting method
Notes
ory
du- set-
res
range
ting
1 Indoor
Main unit
IC
01 to 50
-Assign the smallest address to the main unit in the
-Port number setting is 00
unit
group.
required
-In a system with a sub BC controller, make the set-
tings for the indoor unijs in the following order. -To perform a group op-
(i) Indoor unit to be connected to the main BC con-
eration of indoor units
troller
that feature different
(ii) Indoor unit to be connected to sub BC controller 1
functions, designate
(iii) Indoor unij to
be
connected to sub BC controller 2
the indoor unit in the
Make the settings for the indoor units in the way
group with the greatest
that the formUla "(i) < (ii) <
(iii)"
is true.
number of functions as
Sub unit
Assign sequential numbers starling with the address
the main unit.
of the main unit in the same group "'1. (Main unit ad-
dress "'1, main unit address "'2, main unit address "'3,
etc.)
2
LOSSNAY LC 01
to
50
Assign an arbitrary but unique address to each of
None of these addresses may
00
these unijs after assigning an address to all indoor
overlap any of the indoor unit
units.
addresses.
3
MA
Main remote
MA
No settings
-
Make the same indoor unit
Mai
remote
controller reqUired.
group settings with the system
n
controller as the ones that
controller
Sub remote
MA
Sub ra- Settings to
be
made with the Sub/Main switch were made wijh the MA remote
controller mote con- controller.
troller
4
Outdoor unit OC
51 to 100 -The sum of the smallest address ofthe indoor units
-To set the address to 100,
00
OS
in the same system and 50.
set the rotary switches to 50.
-Assign sequential address to the outdoor unijs in
the same refrigerant circuit.
-The outdoor unijs are automatically designated as
DC and OS. (Note)
5 AUxiliary
BC
BS
51 to 100 Assign an address that equals the sum of the smallest
-To set the address to 100,
00
outdoor
controller
address of the indoor units that are connected to the
set the rotary switches to 50.
unit
(SUb) sub Be controller and SO.
-If the addresses that is as-
BC control-
BC
51 to 100 OC (or OS if it exists) +1
signed to the main BC con-
troller overlaps any of the
ler (Main)
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.
Note
I
The outdoor units in the same refrigerant circuit are automatically designated as OC and
as.
They are designated as OC and
as
in the descending order of capacity (ascending order of address if the capacities are the same).
HWEOB03A
- 37-
GB