Setting the PI485 and connecting the cable
After setting the address of the indoor unit, install the PI485 and set the DIP switch.
And then, connect the RS485 cable for communication with the ACP.
Installing the PI485
• Installing the PI485 depends on the outdoor unit.
• So, install the PI485 by referring to the PI485 manual or the installation technique information.
To connect PI485 and the ACP, two RS-485 cables need to be connected to BUS-A and BUS-B of
PI485. Connect RS-485 cable by referring to the following figure.
If several PI485 are connected to each other to be connected to one ACP, connect each BUS-A
and BUS-B of PI485 to be connected to BUS-A and BUS-B of another PI485.