LG V-NET PQCPC22N0 Installation & User Manual page 77

Installing ACP
77
Information: Connecting RS-485 of the ACP
Up to 16 outdoor units can be connected to one RS-485 port of the ACP, and up to 256 indoor
units can be connected to one ACP. If there are many outdoor units to connect, the outdoor unit
connections shall be appropriately connected to CH1 to CH4 in BUS format. Otherwise, the ACP
may malfunction.
The following is an example of dividing to CH1 and CH2 and connecting in BUS format.
PQCPC22A0
The next shows the wrong example (STAR connection) of RS-485 connection of the ACP.
PQCPC22A0
CAUTION
!
• If a different type of connection is made other than BUS format as in the figure, the
product may malfunction. So be careful during the installation.