Fujitsu AJ 126LELDH Series Design & Technical Manual page 775

¢ Separation rules
• The transmission cable between indoor units, 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 unit should be
used for transmission cable separation.
• Connection of 3 or more lines may cause poor communication for one terminal. In this case, use a
terminal box.
NOTE: Do not loop.
• Example 1: Connecting each outdoor unit and indoor unit with one wiring
• Example 2: Separating transmission cable
4-3. Transmission cable
Refrigerant Refrigerant
system 1 system 2
Signal amplifier
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Separate using
terminal board
- (06-61) -
Refrigerant
system 3
Separate on
the terminal for
transmission cable
System controller
4. Wiring design