Example Connection Of Communication Cable - LG Multi V Plus II System Installation Manual

50Hz
N Example Connection of Communication Cable
1 Outdoor Unit(Half size)
3 Phase 4 Wires
Power supply
50Hz 380~415V
(Main Switch)
Power supply switch
(Switch)
Power supply
1 Phase 50Hz
220~240V
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
B A B A
The GND terminal is a '–' terminal for the central controller, not Ground Line
Power supply switch
(Switch fuse : ELCB)
DRY1 DRY2 GND 12V
Master
Outdoor unit
3 4
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Communication line (2 shield line): Between Indoor Unit and Outdoor Unit
Pull Box(Installer Option)
3 4
Installation Manual 57
Electrical Wiring
3 4