LG ARUN096BT2 Installation Manual page 53

2 Outdoor Units - 3Ø, 460V
When the power source is connected
In series between the units.
Power supply switch
(Switch fuse : ELCB)
3 Phase 3 Wires
Power supply
60Hz 460V
(Main Switch)
Power supply switch
(Switch fuse)
Power supply
1 Phase 60Hz
208/230V
When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 460V
(Main Switch)
Power supply switch
(Switch fuse)
Power supply
1 Phase 60Hz
208/230V
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 connection 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 IDU INTERNET DRY1 DRY2 GND 12V
B A B A
3(A) 4(B) 3(A) 4(B)
The GND terminal is a '–' terminal for the central controller, not Ground Line
Master
Power supply switch
(Switch fuse : ELCB)
Master
Outdoor unit
3(A) 4(B)
3 Phase 3 Wires Power line(R, S, T)
Communication line (3 line): Wired remote control
Slave
Single Phase of power supply line(L(1),L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Pull Box(Installer Option)
Pull Box(Installer Option)
SODU IDU INTERNET DRY1 DRY2 GND 12V
B A B A
SODU IDU INTERNET DRY1 DRY2 GND 12V
B A B A
Electrical Wiring
Master
Outdoor unit
Slave
Outdoor unit
Installation Manual 53