LG MULTI V IV PRO ARUN080LLH4 Installation Manual page 51

Control box and connecting position of wiring
- Remove all of the screws at front panel and remove the panel by pulling it forward.
- Connect communication cables between Master and Slave outdoor unit through the terminal
block.
- Connect communication cables between outdoor unit and indoor units through the terminal
block.
- When the central control system is connected to the outdoor unit, a dedicated PCB must be
connected between them.
- When connecting communication cables between outdoor unit and indoor units with shielded
cable, connect the shield ground to the earth screw.
WARNING
!
The temperature sensor for outdoor air should not be exposed to direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
[Heat pump]
UX5
Front Panel
Main PCB
External PCB
Terminal Block
(Take care of the phase
sequence of 3-phase 4-wire
power system)
ELECTRICAL WIRING
UX6
51