Mitsubishi Electric CMB-WM108V-AA Service Handbook page 53

[ II Restrictions ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [7] -2-
Shielded cable connection
Same as [7] -2-
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block for
transmission line for centralized control (TB7) on the out-
door units (OC) in different refrigerant circuit and on the OC
in the same refrigerant circuit.
If a power supply unit is not connected to the transmission
line for centralized control, replace the power jumper con-
nector on the control board from CN41 to CN40 on only one
of the outdoor units.
a) When connecting TB7, only commence after checking that
the voltage is below 20 VDC.
Only use shielded cables.
(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
Address
setting
range
Main unit IC 01 to 50
Sub unit
LC 01 to 50
Main MA No set-
remote tings re-
controller quired.
Sub MA Sub
remote remote
controller controller
OC 51 to 100
HBC con- HB 51 to 100
troller
(Main)
HBC con- HS
troller (Sub)
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor unit (OC) with the shield wire of the shielded ca-
ble. Short-circuit the earth 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 [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
Same as [7] -2-
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 con-
trollers, 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 ad-
dress 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 control-
ler and 50.
- 44 -
) and the S 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.
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.
Fac-
tory
set-
ting
00
00
Main
00
GB