LG ARUB100LT3, Installation Manual

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Electrical Wiring
2. 60Hz
u
Example Connection of Communication Cable
n
1 Outdoor Unit - 3Ø, 380V
R S T N
Switch
Fuse
L N
Communication Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Outdoor Unit]
[Indoor Units]
Power supply
3 Phase 4 Wires
60Hz 380V
Power supply
1 Phase 60Hz
220V
(Main Switch)
Pull Box
(Installer option) Pull Box
(Installer option) Pull Box
(Installer option) Pull Box
(Installer option)
HR unit
The GND terminal at the main PCB is a ‘-’ terminal for Dry contact, it is not the point to make
Between Indoor and Master Outdoor unit
Master
Outdoor Unit
SODU B SODU A IDU B IDU A INT B INT A
HR unit
3 4 3 4 3 4 3 4 3 4
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.
64 Outdoor Unit