Group Number Setting; Cool & Heat Selector; Static Pressure Compensation Mode; Night Low Noise Function - LG MULTI V IV PRO ARUN220LLN4 Installation Manual

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Group Number setting

Group Number setting for Indoor Units
- Confirm the power of whole system(Indoor Unit, Outdoor Unit) is
OFF, otherwise turn off.
- The communication cables connected to CEN.A and CEN.B terminal
should be connected to central control of Outdoor Unit with care for
their polarity (A-A, B-B ).
- Turn the whole system on.
- Set the group and Indoor Unit number with a wired remote control.
- To control several sets of Indoor Units into a group, set the group ID
from 0 to F for this purpose.
Outdoor Units (External PCB)
SODU.B SODU.A IDU.B IDU.A CEN.B
B A B(D)
Example) Group number setting
1 F
Group Indoor unit
1 st number indicate the group number
2 nd number point out indoor unit number
Group recognizing the central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
Cool & Heat selector
Mode setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn1" Push the '●' button
Select the Option using '▶', '◀' Button :
"oFF","op1","op2" Push the '●' button
Cool & Heat Selection mode is set
Function setting
Switch control
Switch(Up) Switch(Down)
Right side (On) Left side (On) Not operate
Right side (On) Right side (On) Not operate
Left side (On) - Not operate
CEN.A DRY1 DRY2 GND 12V
A(C)
Function
oFF op1(mode) op2(mode)
Cooling Cooling
Heating Heating
Fan mode Off
Right side
Left side
Switch (Up)
Switch (Down)
! CAUTION
• Ask an authorized technician to setting a function.
• If do not use a function, set an off-mode.
• If use a function, first install a Cool & Heat selector.

Static pressure compensation mode

This function secures the air flow rate of ODU, in case static pressure
has been applied like using duct at fan discharge of ODU.
Static pressure compensation mode setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn2" Push the '●' button
Select the Option using '▶', '◀' Button :
"op1" Push the '●' button
Start the Static pressure compensation mode :
Save the selected option value in EEPROM
FAN Maximum RPM of each step
Capacity
Standard
op1
Max. RPM
op2
op3

Night Low Noise Function

In cooling mode, this function makes the ODU fan operate at low RPM
to reduce the fan noise of ODU at night which has low cooling load.
Night low noise function setting method
Master unit PCB DIP switch on : No.5
Select the mode using '▶', '◀' Button :
"Func" Push the '●' button
Select the Function using '▶', '◀' Button :
"Fn3" Push the '●' button
Select the Option using '▶', '◀' Button :
"op1~op14" Push the '●' button
Start the Night low noise function :
Save the selected option value in EEPROM
[Cooling Only]
SODU IDU INTERNET DRY1 DRY2 GND
A
B A B B A
B A B(D) A(C)
8~14 HP 16~22 HP
730 950
800 1000
820 -
850 -