Mitsubishi Electric City Multi CMB-WP108V-G, Service Manual, Page: 46 / 301

[
II
Restrictions ]
37 - 37 - HWE1113B GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 2.
Only use shielded cables.
Shielded cable connection
Same as [5] 2.
2) Transmission line for centralized control
Daisy-chain terminals A and B on the system controller, termi-
nals 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 outdoor units (OC and OS) (Note
a) in the same refrigerant circuit. (Note b)
When both of the following conditions are met, move the power
jumper connector on the control board from CN41 to CN40 on
only one of the outdoor units: (1) No power supply units are con-
nected to the transmission line for centralized control AND (2)
No controllers with a power-supply function are connected to
the system.
If a system controller is connected, set the central control switch
(SW2-1) on the control board of all outdoor units to "ON."
a) The outdoor units in the same refrigerant circuit are automatical-
ly 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 or-
der 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 maintain the cen-
tral control even during an OC failure or a power failure, connect
TB7 on OC and OS together. (If there is a problem with the out-
door unit whose power jumper was moved from CN41 to CN40,
central control is not possible, even if TB7's are daisy-chained.)
Œ
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal of the terminal block (TB7) on the
system controller, OC, and OS with the shield 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 [5] 1.
When 2 remote controllers are connected to the sys-
tem
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 indoor unit (IC) to the appropriate terminals on the terminal
block for indoor-outdoor transmission line (TB5) on LOSSNAY
(LC). (Non-polarized two-wire)
Œ
Indoor units must be interlocked with the LOSSNAY unit
using the system controller. (Refer to the operation man-
ual for the system controller for the setting method.) In-
terlock setting from the remote controller is required if the
ON/OFF remote controller alone or the LM adapter alone
is connected.
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.
Œ
Port number setting is
required
Œ
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.
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 MA
remote
controller Main
remote con-
troller MA No set-
tings re-
quired. - Make the same indoor unit
group settings with the system
controller as the ones that
were made with the MA remote
controller. Main
Sub
remote con-
troller MA Sub
remote
controller Settings to be made with the Sub/
Main switch
4 Outdoor unit (Note) OC
OS 51 to 100
Œ
Assign sequential address to the outdoor
units in the same refrigerant circuit.
Œ
The outdoor units are automatically desig-
nated as OC and OS.(Note)
Œ
To set the address to 100,
set the rotary switches to 50.
Œ
If the address that is as-
signed to the HBC controller
overlaps any of the address-
es that are assigned to the
outdoor units, use a differ-
ent, unused address within
the setting range.
00
5 Auxiliary
outdoor
unit HBC con-
troller HB 51 to 100 OC (or OS if it exists) +1