LG LT-E1820CL Service Manual page 37

3) Group Control(Optional Wiring)
It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Indoor Unit 1
Terminal(Local Supply)
Block
RED(12V) RED(12V)
YL(SIGNAL) YL(SIGNAL)
BR(GND) BR(GND)
AUTO SWING OPERATION SET TEMP FAN SPEED SUB FUNCTION
Room Temp
HI AUTO Heater Preheat
MED JET Defrost Humidify
LO Filter Out door
Time ZONE 1 2 3 4
Timer Operation unit Program set
On Off
Set no. Time 01 03 05 07 09 11 13 15 17 19 21 23
Wired Remote Controller
(Standard)
Single
Slide Switch2
Group
CAUTION
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25 ) on connecting each units.
• Use a wire more than 0.5mm
NOTICE
Wiring Diagram for Cooling only
]
OUTDOOR WIRING DIAGRAM
BL CAPACITOR
R
H
RD
COMP
S
C
4 8
POWER
RELAY
2 6
( ) ( ) ( )
1 L 2 N 3 L
POWER
INPUT
Indoor Unit 2
Terminal(Local Supply)
Block
Connector
Main PCB
YL(SIGNAL) YL(SIGNAL)
#1
BR(GND) BR(GND)
Remote
Controller
PCB
2
YL
FAN
C F
OR
MOTOR
BK
1
0
TB2
( )
4 N 5 6 7
TO INDOOR UNIT
Main PCB
Terminal(Local Supply)
Block
Connector
Main PCB
....
YL(SIGNAL)
#2
BR(GND)
Connecting Cable(Local Supply)
....
• Using the supplied Wired Remote Controller, wire
them like above.
• Move slide switch 2 to "Group" position.
• Ensure that the color of wire.
INDOOR WIRING DIAGRAM
BR
BL
GN/YL
RD
8
TERMINAL
TERMINAL
BLOCK
BLOCK
–37–
Indoor Unit 16
Connector
Main PCB
YL(SIGNAL)
#16
BR(GND)
BR
INDOOR DRAIN STEP
MOTOR
PUMP MOTOR
YL
FUSE T3.15A
CN - DISP
DISPLAY PCB
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL