LG ARUN115DT2 Installation Manual page 53

I 2 Outdoor Units - 3Ø, 460V
I When the power source is connected
In series between the units.
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)
Slave
Communication line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
SODU IDU INTERNET DRY1 DRY2 GND 12V
B A B A
SODU IDU INTERNET DRY1 DRY2 GND 12V
B A B A
Installation Manual 53
Electrical Wiring
Master
Outdoor unit
Slave
Outdoor unit