LG multi v Installation Manual page 63

! WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current
leakage, Communication disorder by noise effect and motor current leakage (without connec-
tion to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately
from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because
this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power
goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B
A B 3(A) 4(B)
HR unit
SODU. B SODU. A IDU. B IDU. A CEN. B
SODU. B SODU. A IDU. B IDU. A CEN. B
SODU. B SODU. A IDU. B IDU. A CEN. B
• 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)
Master
CEN. A DRY1 DRY2 GND 12V
Outdoor Unit
3(A) 4(B)
CEN. A DRY1 DRY2 GND 12V
CEN. A DRY1 DRY2 GND 12V
CEN. A DRY1 DRY2 GND 12V
3(A) 4(B) 3(A) 4(B)
Master
Outdoor Unit
Slave1
Outdoor Unit
Slave2
Outdoor Unit
ELECTRICAL WIRING
63