Mitsubishi Electric City Multi CMB-WP108V-G, Service Manual

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[
II
Restrictions ]
39 - 39 - HWE1113B GB
(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)
Œ
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 ( ) on the outdoor units (OC and
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)
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 connected to
the transmission line for centralized control AND (2) No controllers
with a power-supply function are connected to the system.
Set the central control switch (SW2-1) 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
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.)
Œ
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 [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 units (IC) to the appropriate terminals on the terminal block for
indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
Œ
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.
(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 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