Mitsubishi Electric CMB-WM108V-AA Service Handbook page 55

[ II Restrictions ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [7] -2-
Only use shielded cables.
Shielded cable connection
Same as [7] -2-
2) Transmission line for centralized control
Daisy-chain terminals A and B on the system controller, ter-
minals M1 and M2 on the terminal block for transmission line
for centralized control (TB7) on the outdoor units (OC) in dif-
ferent refrigerant circuits and on the outdoor unit (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.
If a system controller is connected, set the central control
switch (SW5-1) on the control board of all outdoor units to
"ON."
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 Main unit
unit
Sub unit
2 LOSSNAY
3 MA
Main
remote con-
remote
troller
controller
Sub
remote con-
troller
4 Outdoor unit (Note)
5 Auxiliary
HBC con-
troller
outdoor
(Main)
unit
HBC con-
troller (Sub)
HWE1708A
Ad-
dress
setting
range
IC 01 to Assign the smallest address to the main unit
in the group.
50
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.)
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.
HB OC +1
51 to 100
HS
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.
Shielded cable connection
Daisy-chain the S terminal of the terminal block (TB7) on the
system controller, OC with the shield of the shielded cable.
Short-circuit the earth terminal (
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
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)
Indoor units must be interlocked with the LOSSNAY unit us-
ing the system controller. (Refer to the operation manual for
the system controller for the setting method.) Interlock set-
ting from the remote controller is required if the ON/OFF re-
mote controller alone or the LM adapter alone is connected.
5) Switch setting
Address setting is required as follows.
Setting method
-
- 46 -
) and the S terminal on
Notes
Port number setting is re-
quired
To perform a group opera-
tion of indoor units that fea-
ture different functions,
designate the indoor unit in
the group with the greatest
number of functions as the
main unit.
None of these addresses may over-
lap 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 assigned 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 dif-
ferent, unused address within the
setting range.
The use of a sub HBC controller
requires the connection of a main
HBC controller.
Fac-
tory
set-
ting
00
00
Main
00
GB