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ENGLISH
Example) Group number setting 
1
st
number indicate the group number
2nd number point out indoor unit number
ODU.B ODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V
B(D) A(C) 
1 F
Group Indoor unit
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)
Mode Function Option Value Action
Remarks 
Content 
Display1 
Content 
Display2 
Content Display3 
Content Display4 
Implement Display5 
Cool & Heat
Selector 
oFF 
op1~
op2 
Selected
the option 
- - 
Change
the set
value 
Blank 
Save in
EEPROM 
Static pres-
sure com-
pensation 
oFF 
op1~
op3
Selected
the option 
- - 
Change
the set
value 
Blank 
Save in
EEPROM 
Night low
noise 
oFF 
op1~o
p12 
Selected
the option 
- - 
Change
the set
value 
Blank 
Save in
EEPROM 
ODU 
address 
- 
- 
0~255 
set
the
value 
Change
the set
value 
Blank 
Save in
EEPROM 
Snow re-
moval &
rapid defrost 
oFF 
op1~
op3 
Selected
the option 
- - 
Change
the set
value 
Blank 
Save in
EEPROM 
Target 
pressure 
adjusting 
oFF 
op1~
op3 
Selected
the option 
- - 
Change
the set
value 
Blank 
Save in
EEPROM 
Valve (04)
EX)
Valve (03)
Valve (02)
Valve (01)
Indoor unit (04)
Indoor unit (03)
Indoor unit (02)
Indoor unit (01)
Central control address
HR unit
WARNING
• Valve address and central control address of its corresponding indoor
unit should be set identical in manual addressing.
!
TEST RUN
Cool & Heat selector
Mode setting method
Service 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 Function
Switch(TOP) Switch(Bottom)
oFF op1(mode) op2(mode)
Right Left Not operate Cooling Cooling
Right Right Not operate Heating Heating
Left - Not operate Fan mode Off
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.
!
Switch (TOP)
Switch (Bottom)
Left side
Right side
* Functions save in EEPROM will be kept continuously, though the
system power was reset.
* Dip switch 3 can be OFF except when installing the only 4 series in-
door units (named ARNU***4).
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 (Main PCB)
Installation
1,MFL69717904,영영  18. 8. 29.  영영 2:50  Page 30