LG PQNFB17C1 Installation & Owner's Manual page 97

When the outdoor unit is Multi V Super , and central control is not well performed with 16
room central controller or ACP BACnet, and the indoor units malfunction such as some indoor
units automatically becoming locked state or automatically converting to cooling during heating
operation
1. PI485 and outdoor unit may not be doubly connected. Please refer to the following picture to
check the connection status of the communication line.
When the image of Web GUI is broken and you cannot see the screen such as the temperature well
1. Close Web GUI, and rerun.
Caution
If PC is used for a long period of time, or several application programs are used at the
same time, PC performance may be degraded and may affect the ACP BACnet UI.
When you use Web GUI, it is recommended to close other application programs.
It is recommended to use Web GUI only during the control and monitoring.
(Maximum of 3 hours of usage is recommended according to the PC environment.)
Normal communication line connection
Wrong connection
NOTES
87