Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 34

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 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]
To ground the shielded cable, daisy-chain the ground terminal on the outdoor unit (OC), S terminals on the terminal
block (TB3) on the terminal block (TB1) on the BC controller (BC), and the S terminal on the terminal block (TB5)
on the indoor unit (IC).
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Connect terminals 1 and 2 on the terminal block for MA remote controller line (TB15) on the indoor unit (IC) to the
terminal block on the MA remote controller (MA). (Non-polarized 2-core cable)
MA remote controllers can be connected to the indoor units of type C or later.
[When 2 remote controllers are connected to the system]
When 2 remote controllers are connected to the system, connect terminals 1 and 2 of the terminal block (TB15) on
the indoor unit (IC) to the terminal block on the two MA remote controllers.
Set one of the MA remote controllers to sub. (Refer to MA remote controller function selection (4 [3]2.) or the in-
stallation manual for the MA remote controller for the setting method.)
[Group operation of indoor units]
To perform a group operation of indoor units (IC), daisy-chain terminals 1 and 2 on the terminal block (TB15) on all
indoor units (IC) in the same group, and then connect terminals 1 and 2 on the terminal block (TB15) on the indoor
unit on one end to the terminal block on the MA remote controller. (Non-polarized 2-core cable)
To perform a group operation of indoor units that have different functions, refer to [4] 2.
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 (TB5) on LOSSNAY (LC). (Non-polarized 2-core cable)
Interlock operation setting with all the indoor units in the same system will automatically be made.
Refer to "[4] 2. Manual address setup for both indoor and outdoor units" in the following cases: performing an in-
terlock operation of part of the indoor units in the system with a LOSSNAY unit, using LOSSNAY alone without
interlocking it with any units, performing an interlock operation of more than 16 indoor units with a LOSSNAY unit,
or connecting two or more LOSSNAY units to indoor units in the same system.
5) Switch setting
No address settings required.
Pro
ce-
Unit or controller
du-
res
1 Indoor Main unit
unit
Sub unit
2 LOSSNAY
3 MA Main
remote remote
controller controller
Sub
remote
controller
4 Outdoor unit
5 Auxiliary BC
unit controller
Wiring method/address setting method
Address
setting Setting method
range
IC No settings
required.
IC
LC No settings
required.
MA No settings
required.
MA Sub Settings to be made ac-
remote cording to the remote con-
controller troller function selection
OC No settings
required.
BC
- 25 -
Notes
- Port number setting is re-
quired by an R2 system.
To perform a group opera-
tion of indoor units that
have different functions,
refer to [4] 2.
-
-
-
[ II Restrictions ]
Facto-
ry set-
ting
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Main
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