Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 52

1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor
unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor transmission line (TB02) on the BC con-
troller (BC and BS), terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on
each indoor unit (IC), and terminals M1 and M2 on the system controller. (Non-polarized 2-core cable)
Only use shielded cables.
[Shielded cable connection]
To ground the shielded cable, daisy-chain the ground terminal on the outdoor unit and on the terminal block
(TB1) on the BC and BC, the S terminal on the terminal block (TB5) on the indoor unit, and the S terminal on
the system controller.
2) Transmission line for centralized control
Same as [4] 4.
[Shielded cable connection]
Same as [4] 3.
3) MA remote controller wiring
Same as [4] 1.
[When 2 remote controllers are connected to the system]
Same as [4] 1.
[Group operation of indoor units]
Same as [4] 1.
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block (TB5) on the indoor units (IC) to the appropriate terminals
on the terminal block for indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-polarized 2-core ca-
ble)
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 connected.
5) Switch setting
Address setting is required as shown on the next page.
Wiring method
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[ II Restrictions ]