Mitsubishi Electric CMB-WM108V-AA Service Handbook page 59

[ 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 terminal block for indoor-outdoor trans-
mission line (TB02) on the main and sub HBC controllers
(HB and HS), and of the terminal block for indoor-outdoor
transmission line (TB5) on each indoor unit (IC). (Non-
polarized two-wire)
Only use shielded cables.
Shielded cable connection
Daisy-chain the ground terminal ( ) on the outdoor unit
(OC), the 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 shield-
ed cable.
2) Transmission line for centralized control
Daisy-chain terminals A and B of the system controller,
M1 and M2 terminals of TB7 (terminal block for central-
ized control system connection) on the outdoor units
(OC) in different refrigerant systems, and M1 and M2 ter-
minals of TB7 (terminal block for centralized control sys-
tem connection) on the outdoor unit (OC) in the same
refrigerant circuit.
If a power supply unit is not connected to the transmis-
sion line for centralized control, replace the power jump-
er connector on the control board from CN41 to CN40 on
only one of the outdoor units.
When connecting a system controller, set the centralized
control switch (SW5-1) on the control board of all indoor
units to "ON."
a) When connecting TB7, only commence after checking
HWE1708A
that the voltage is below 20 VDC.
Only use shielded cables.
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 (
minal 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 sys-
tem
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
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.
- 50 -
) and the S ter-
GB