LG ARUN038GS2 Installation Manual page 47

Example Connection of Communication Cable
1 Outdoor Unit - 3Ø, 208/230V
Power supply switch
(Switch fuse : ELCB)
3 Phase 3 Wires
Power supply
60Hz 208/230V
(Main Switch)
Power supply switch
(Switch fuse)
Power supply
1 Phase 60Hz
208/230V
HR unit
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 prod-
uct 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
B A B A
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
3 Phase 3 Wires Power line(R, S, T)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
Pull box(installer option)
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
Electrical Wiring
3(A) 4(B)
Installation Manual 47