LG multi V ARWB Series Installation Manual page 30

30
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
A B 3(A) 4(B) 3(A) 4(B)
HR unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
• It is not the point to make ground connection.
- Make sure that terminal number of master and slave outdoor units
are matched.(A-A,B-B)
Example) Connection of Communication Cable
[BUS type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outside unit .
Example) Connection of power and communication cable (UWC)
Master
GND 12V
Outdoor Unit
3(A) 4(B) 3(A) 4(B)
Master
DRY2 GND 12V
Outdoor Unit
Slave1
DRY2 GND 12V
Outdoor Unit
Slave2
DRY2 GND 12V
Outdoor Unit
[STAR type]
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm
(1.97inch)
gap
Communication
cable
Main Power Connection
Main power
terminal block
Insulation sleeves
attachments
Fix firmly not
to be displaced
Communication Connection
! CAUTION
It should be wiring power cables or communication cables to avoid
interference with the oil level sensor. Otherwise, That oil level sensor
would be operated abnormally.
Checking the setting of outside units
Checking according to dip switch setting
- You can check the setting values of the Master outside unit from the
7 segment LED.
The dip switch setting should be changed when the power is OFF.
Checking the initial display
The number is sequentially appeared at the 7 segment in 5 seconds
after applying the power. This number represents the setting condition.
• Initial display order
Order No
①
8~20
②
10~20
③
10~20
④
8~54
1
⑤
2
3
38
⑥
46
22
1
⑦
2
• Example) ARWB480DAS4
① ② ③
20 14 14
• Master Unit • Slave Unit
Dip switch setting
ODU-IDU
Communication cable
ODU-ODU
Communication cable
Mean
Master model capacity(HP)
Slave 1 model capacity(HP)
Slave 2 model capacity(HP)
Total capacity(HP)
Cooling Only
Heat Pump
Heat Recovery
380V model
460V model
220V model
Full function
Core function
④ ⑤ ⑥
46 3 46
Dip switch setting ODU Setting
Slave 1
Slave 2
⑦
1