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Mitsubishi Electric PURY-HP72 Service Handbook page 52

R410a
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[2-7 Example System with an MA Remote Controller ]
(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 units (OC and OS)
(Note a), of the terminal block for indoor-outdoor transmission line
(TB02) on the main and sub BC controllers (BC and BS), of the ter-
minal block for indoor-outdoor transmission line (TB5) on each in-
door unit (IC), and the S terminal of the system controller.(Non-
polarized two-wire)
Only use shielded cables.
a) The outdoor units in the same refrigerant circuit are automatically
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).
Shielded cable connection
Daisy-chain the ground terminal (
OS), the S terminal of the terminal block (TB02) on the BC and BS,
and the S terminal of the terminal block (TB5) on the indoor unit (IC)
with the shield of the shielded cable.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block for transmis-
sion line for centralized control (TB7) on the outdoor units (OC) in
different refrigerant circuits and on the OC and OS in the same re-
frigerant circuit. (Note b)
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 units.
Set the central control switch (SW5-1) on the control board of all out-
door units to "ON."
b) If TB7's on the outdoor units in the same refrigerant circuit are not
(5) Address setting method
Proce-
Unit or controller
dures
1
Indoor
Main unit
unit
Sub unit
2
LOSSNAY
3
MA
Main
remote con-
remote
troller
controller
Sub
remote con-
troller
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).
HWE13080
) on the outdoor units (OC and
Address
setting
range
IC
01 to
Assign the smallest address to the main unit
in the group.
50
In 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.
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
Assign an arbitrary but unique address to
each of these units after assigning an address
50
to all indoor units.
MA
No set-
tings re-
quired.
MA
Settings to be made with the Sub/
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 desig-
nated 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
- 41 -
41
daisy-chained, connect the transmission line for the central control
system to TB7 of the OC. (Note a).To maintain the central control
even during an OC failure or a power failure, connect TB7 on OC
and OS together. (If there is a 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.)
c) When connecting TB7, only commence after checking that the volt-
age is below 20 VDC.
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on the out-
door units (OC, OS) with the shield wire of the shielded cable. Short-
circuit the earth terminal (
) and 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 2-7-1
When 2 remote controllers are connected to the system
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 in-
door units (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 using the
system controller. (Refer to the operation manual for the system
controller for the setting method.) Interlock setting from the remote
controller is required if the ON/OFF remote controller alone is con-
nected.
5) Switch setting
Address setting is required as follows.
Setting method
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.
-
Make the same indoor unit
group settings with the system
controller as the ones that
were made with the MA remote
controller.
It is not possible to connect a
pair of PAR-30MAAU.
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.
Facto-
Notes
ry set-
ting
00
00
Main
00
GB

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