Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 40

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 controller
(BC and BS), and terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each
indoor unit (IC). (Non-polarized 2-core cable)
Only use shielded cables.
[Shielded cable connection]
Same as [4] 1.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block for centralized control transmission line (TB7). Disconnect
the male connector on the controller board from the female power supply switch connector (CN41), and connect it
to the female power supply switch connector (CN40).
Only use shielded cables.
[Shielded cable connection]
To ground the shielded cable, daisy-chain the S-terminals on the terminal block (TB7) on each of the outdoor units.
Connect the S (shielded) terminal on the terminal block (TB7) on the outdoor unit whose CN41 was replaced with
CN40 to the ground terminal ( ) on the electric box.
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
Same as [4] 2.
5) Switch setting
Address setting is required as shown on the next page.
Wiring method
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[ II Restrictions ]