LG multi V ARUN Series Installation Manual page 58

Electrical Wiring
Field Wiring
1. 50Hz
u Example Connection of Communication Cable
n 1 Outdoor Unit-3Ø, 380-415V
3 Phase 4 Wires
50Hz 380-415V
(Main Switch)
Power supply
1 Phase 50Hz
Pull Box
(Installer option)
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.
The GND terminal at the main PCB is a '-' terminal for day contact, it is not the point to make
ground connection.
58 Outdoor Unit
Power supply
R S T N
Switch
Fuse
220-240V
N
L
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
Between Indoor and Master Outdoor unit
SODU IDU INTERNET DRY1 DRY2 GND 12V
A
B A B B
3 4 3 4
[Outdoor Unit]
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
[Indoor Units]
Master
Outdoor Unit
A
3 4
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)