18
6 Usage of Remote Receiver
When the remote receiver is adopted, set 2(L/I) position on the S7 functional DIP switch to the
“OFF” side, then connect the remote receiver to the main board.
For indoor units, there are two options: work with remote receiver or wired controller. if the
remote receiver is used, the wired controller can not be put into effect at the same time.
CN27
U7
CN18
remote receiver
main boar
d
Fig.20 Connection between main board and remote receiver
main board
Supplied 4 core cable
CN18
CN1
Fig.21 Power/communication Wiring illustration of wired controller
When connect wired controller to main board, use a 4 cores cable to set up a communication
wiring from CN18 terminal on the main board to CN1 terminal on the wire controller. Make sure the
power is shut off before the wiring. check if the wiring is firmly and prevent any circuit shortage after
finishing this step one more time. There are 4 pieces of wires in the cable of controller. (all included
in the 4 cores cable), count from upper right direction of wiring terminal are the name of the wires:
Earthed wire (GND), communication wire A (A), communication B(B), power wire (+12V).
