LG multi V ARUN Series Installation Manual page 65

2. 60Hz
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 380V
3 Phase 4 Wires
Power supply
60Hz 380V
(Main Switch)
Power supply
1 Phase 60Hz
220V
L
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
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
B
3
The GND terminal at the main PCB is a '-' terminal for day contact, it is not the point to make
ground connection.
R S T N
Switch
Fuse
N
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
IDU INTERNET DRY1 DRY2 GND 12V
A
A B B A
4 3 4
[Outdoor Unit]
Communication Line
Pull Box Pull Box
(Installer option) (Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
[Indoor Units]
Master
Outdoor Unit
3 4
Electrical Wiring
(2 Wires Cable)
Installation Manual 65