LG ARNU07GTRB4 Installation Manual page 16

Installation
3. Group Control 3
n Mixture connection with indoor units and Fresh Air Intake Unit
FAU
Master
Master
h In case of connecting with standard indoor unit and Fresh Intake Unit, separate Fresh Air Intake
Unit with standard units. (Because setting temperature are different.)
h Other than those, it is same with Group Control 1.
FAU
16 Indoor Unit
FAU
Slave
N
Display Error Message
FAU Standard Standard
LGAP Network System
or
Master
Display Error Message
Master
FAU
GND
Signal
Slave
12 V
M
FAU Standard Standard
* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit