LG ARUV025GSD0 Engineering Product Data Book page 30

11. Field Wiring
11.1 50/60Hz
u Example Connection of Communication Cable
n Single Outdoor Unit
Power supply
(1-phase 2-wire)
(Main Switch)
Power cable (2-wire Cable)
Communication cable(3-wire Cable)
Communication cable (2-wire Cable)
Pull Box
1.5mm 2 , 1.5mm 2 ,
L
N
G
1.5mm ,
2
WARNING
• All Installation site must require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it
may cause an electric shock.
• 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 con-
sists 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.
Power supply Swich
SODU B SODU A IDU B IDU A INT B
3 4 3 4
Outdoor Unit
INT A
3 4
Voltage range(V)
Frequency
Outdoor Indoor
50Hz 220-240V 220-240V
60Hz 220V 220V
R410A(50/60Hz)
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