LG ARUN80LN3 Installation Manual page 55

Control box and connecting position of wiring
- Remove all of the screws at front panel and remove the panel by pulling it forward.
Front Panel
WARNING
The temperature sensor for outdoor air should not be exposed to direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
UX2
- Connect transmission line between main and sub outdoor unit through the
terminal block.
- Connect transmission lines between outdoor unit and indoor units through
the terminal block.
- When the central control system is connected to the outdoor unit, a dedicat-
ed PCB must be connected between them.
- When connecting transmission line between outdoor unit and indoor units
with shielded wire, connect the shield ground to the earth screw.
UX3
Main PCB
Inverter fan PCB
Noise filter
Reactor
Bridge diode
Magnet switch
Inverter PCB
Take care of the phase
sequence of 3-phase
4-wire power system
Electrical Wiring
Main PCB
Inverter fan PCB
Noise filter
Reactor
Bridge diode
Magnet switch
Inverter PCB
Take care of the phase
sequence of 3-phase
4-wire power system
UX1
Main PCB
Inverter fan PCB
Noise filter
Reactor
Bridge diode
Inverter PCB
Take care of the phase
sequence of 3-phase
4-wire power system
Installation Manual 55