Fujitsu AIRSTAGE J-III L AJ 072LELAH Series Design & Technical Manual page 742

„ TRANSMISSION LINE SEPARATION RULES
„
● The transmission line between indoor unit, outdoor unit and controllers can be connected by
„
one cable.
● Terminal board available on the market or the ones inside the indoor unit or outdoor should
„
be used for transmission line separation.
● Connection of three or more lines may cause poor communication for one terminal. In this
„
case, please use a terminal box.
Note
● Do not loop.
Example 1 : Connecting each outdoor and indoor unit with one connection wiring.
Refrigerant Refrigerant
system 1 system 2
Signal
Amplifier
Example 2 : Separating transmission line.
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Separate using
terminal board
Refrigerant
system 3
Separate on
the terminal for
transmission line.
System
controller
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