LG Multi V ARUB Series Installation Manual page 68

Main unit and Sub unit PCB
Installation of Simple Central Controller
Confirm the power of whole system(outdoor unit and indoor/HR units) is OFF, otherwise turn off.
The transmission lines connected to C, D of simple central controller should be connected to C,D terminal
port for central control of outdoor unit with care for their polarity (C ➔ C, D ➔ D)
Both the DC power (Vcc) and the GND connect the simple central controller according to the polarity of Vcc
terminal and GND.
Turn the whole system on.
Set the group and indoor unit number with a wired remote control.
To control several sets of indoor units into a group, set the group ID from 0 to F for this purpose.
68 Outdoor Unit
Terminal block of outdoor unit
Indoor unit Outdoor unit Central controller
A B E F C
Vcc
Simple central controller
Group recognition of the simple central controller
No. 0 group (00~0F)
No. 1 group (10~1F)
No. 2 group (20~2F)
No. 3 group (30~3F)
No. 4 group (40~4F)
No. 5 group (50~5F)
No. 6 group (60~6F)
No. 7 group (70~7F)
No. 8 group (80~8F)
No. 9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
D Vcc GND
GND
D
C