Mitsubishi Electric CMB-WM108V-AA Service Handbook page 57

[ 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 unit (OC), of the ter-
minal block for indoor-outdoor transmission line (TB02) on the main
and sub HBC controllers (HB and HS), of the terminal block for in-
door-outdoor transmission line (TB5) on each indoor unit (IC), and
the S terminal of the system controller.(Non-polarized two-wire)
Only use shielded cables.
Shielded cable connection
Daisy-chain the ground terminal (
S terminal of the terminal block (TB02) on the HB and HS, 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 circuit and on the OC in the same refrigerant cir-
cuit.
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."
a) When connecting TB7, only commence after checking that the volt-
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor
unit
2 LOSSNAY
3 MA
remote
controller
4 Outdoor unit
5 Auxiliary
outdoor
unit
HWE1708A
) on the outdoor unit (OC), the
Address
setting
range
Main unit IC 01 to
50
Sub unit
LC 01 to
50
Main MA No set-
remote con- tings re-
troller quired.
Sub MA Sub
remote con- remote
troller controller
OC 51 to 100
HBC con- HB 51 to 100
troller
(Main)
HBC con- HS
troller (Sub)
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 (
block (TB7) on the outdoor unit whose power jumper connector is
mated with CN40.
3) MA remote controller wiring
Same as [7] -1-
When 2 remote controllers are connected to the system
Same as [7] -1-
Group operation of indoor units
Same as [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
Assign the smallest address to the main unit
in the group.
In a system with two or more HBC control-
lers, make the settings for the indoor units
in the following order.
(i) Indoor unit to be connected to the main
HBC controller 1
(ii) Indoor unit to be connected to sub HBC
controller 1
(iii) Indoor unit to be connected to the main
HBC controller 2
(iv) Indoor unit to be connected to sub HBC
controller 2
Make the settings for the indoor units in the
way that the formula "(i) < (ii) < (iii)< (iv)" 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.)
Assign an arbitrary but unique address to
each of these units after assigning an address
to all indoor units.
-
Settings to be made with the Sub/
Main switch
Assign sequential address to the outdoor
units in the same refrigerant circuit.
OC +1
Assign an address that equals the sum of the
smallest address of the indoor units that are
connected to the sub HBC controller and 50.
- 48 -
) and the S terminal on the terminal
Notes
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.
To set the address to 100,
set the rotary switches to 50.
If the addresses that is as-
signed to the main HBC
controller overlaps any of
the addresses that are as-
signed to the outdoor units
or to the sub HBC controller,
use a different, unused ad-
dress within the setting
range.
The use of a sub HBC con-
troller requires the connec-
tion of a main HBC
controller.
Facto-
ry set-
ting
00
00
Main
00
GB