LG AUUH246A - Page 73

Installation
Service Manual 73
2) Adjusting air volume to the height of ceiling(Ceiling Cassette model)
You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the
comfortable atmosphere to consumers.
Procedure
1. Choose the selectable position in the table after measuring the height of ceiling.
2. In the case of changing the height as "high" or "low", open the rear cover of the wired remote-controller.
3. Move the slide switch to the set position.
4. Close the rear cover and check if it works nomally.
TH
R14H
SW TH
REMO
MAIN
2TH
OP7
R18H
R17H
OP6
LO
STAND
SW HIGH
HI
R03S
C070
R04S
R02S
R01S
OP3
OP2 OP1
R19H
R11H
R13H R12H
OP5R16H OP4
R15H
CO1H
Lo
Hi
STAND
Slide switch for ceiling height
Slide switch for 2 Thermistor
Standard
(Default)
Low ceiling
High Ceiling
Ceiling height Mode of slide switch Change of air volume Remark
more than 3.3m High Ceiling Increasing
2.7~3.3m Standard -
less than 2.7m Low Ceiling Decreasing
Maunfactured in
standard mode
3) Group Control(Ceiling Cassette/Ceiling Concealed duct model)
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25Ω) on connecting each units.
• Use a wire more than 0.5mm
2
CAUTION
It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent
overcurrent.
Wiring design
Operation unit
ZONE
1234
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
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)
Connecting Cable(Local Supply)
Connector Connector
....
....
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Remote
Controller
PCB
Single
Group
S/W GR
• Using the supplied Wired Remote Controller, wire
them like above.
• Move S/W GR to "Group" position.
• Check the line color of the wire.