LG A2UQ166FA0, Service Manual, Page: 103 / 238

Service Manual 103
2) Group Control(Optional Wiring)
• You can use a group control operation after connecting the brown and yellow wire of each air-conditioner.
• Remove the resistor "OP 7" in remote controller.
• It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Wiring design
Features
• Use Only One Wired Remote Controller with several air conditioners(max. 16 Units)
• Random starting to prevent overcurrent.
Operation unit
ZONE 1 2 3 4
Humidify JET
AUTO
AUTO SWING OPERATION FAN SPEED
Program set
SUB FUNCTION SET TEMP
Room Temp
HI
MED
LO Heater
Defrost
Filter Preheat
Out door
Time
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
Indoor Unit 1
Terminal(Local Supply)
Block Terminal(Local Supply)
Block Terminal(Local Supply)
Block
Main PCB
#1
Main PCB
#2
Main PCB
#16
Wired Remote Controller
Slide Switch
OP7
Remote
Controller
PCB
Indoor Unit 2
Main PCB
Indoor Unit 16
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
RED(12V)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Connecting Cable(Local Supply)
Connector Connector
....
....
CAUTION: • Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below
200m(25
Ω
) on connecting each units.
• Use a wire more than 0.5mm2
Operation