LG Single "A" Service Manual page 27

Part 2 Functions & Controls
6.4.3 Group Control(Optional Wiring)
• You can use a group control operation after connecting the brown and yellow wire of each air-conditioner.
• It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Wiring design
RED(12V)
YL(SIGNAL)
BR(GND)
AUTO SWING OPERATION SET TEMP FAN SPEED
Room Temp
HI AUTO
MED JET
LO
Time ZONE
Timer Operation unit Program set
On Off
Set no. Time 01 03 05 07 09 11 13 15 17
Features
• Use Only One Wired Remote Controller with several air conditioners(max. 16 Units)
• Random starting to prevent overcurrent.
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25Ω) on connect-
ing each units.
• Use a wire more than 0.5mm2
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Indoor Unit 1
Terminal(Local Supply)
Block
Connector
RED(12V)
Main PCB
YL(SIGNAL)
YL(SIGNAL)
#1 BR(GND)
BR(GND)
SUB FUNCTION
Heater Preheat
Defrost Humidify
Filter Out door
1 2 3 4
19 21 23
Wired Remote Controller
Main PCB
Indoor Unit 2
Terminal(Local Supply)
Block
Connector
Main PCB
YL(SIGNAL)
YL(SIGNAL) ....
#2 BR(GND)
BR(GND)
Connecting Cable(Local Supply)
....
Single
Group
- 26 -
Indoor Unit 16
Terminal(Local Supply)
Block
Connector
Main PCB
YL(SIGNAL)
#16
BR(GND)
LGE Internal Use Only