23
CAUTION
Never shut off the sub power breaker of any indoor unit unless in emergency conditions, otherwise
the whole VRF system cannot run normally.
9.3 Main communication wiring
Main communication wiring is connect the wire to the terminal block F1/F2 , it connect between outdoor
unit and indoor unit or between the indoor units. For indoor units’ connection please refer to the installation
manual of indoor unit. For outdoor unit, connect the communication wire as following steps:
● Unscrew and remove the service lid, please refer to chart 30.
● Connect the communication wire to the terminal block F1,F2.
● Tie the wire tightly.
Main communication wiring supply two connecting types: L-link type and T-link type.
Example:
(One outdoor unit connect with five indoor units)
(1) L-link type system:
Two twisted wires
Outdoor
unit
Indoor
unit A
Indoor
unit B
Indoor
unit C
Indoor
unit D
Indoor
unit E
Chart 32
(2) T-link type system:
Two twisted wires
Outdoor
unit
Indoor
unit A
Indoor
unit B
Indoor
unit C
Indoor
unit D
Indoor unit E
Chart 33
Following link type is not allowed!
Two twisted wires
Outdoor
unit
Indoor
unit A
Indoor unit B Indoor
unit C
Indoor unit D
Indoor
unit E
Chart 34
9 fIeLD wIrING
