LG AC Ez Touch User Manual page 65

HOW TO USE
65
<RS485 communication cable connection>
Maximum of 64 indoor units can be connected to one AC Ez Touch. If multiple number of the
outdoor units need to be connected, the connection should be in BUS type. Otherwise, AC Ez
Touch may malfunction.
<Correct example : <Incorrect example :
RS485 BUS-type connection> RS485 STAR-type connection>