LG ARWB200LAS4 Installation Manual page 25

Outside Unit
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
2-Core Shield Cable
Outside Unit
Indoor
Unit
Remote
control
Outside Unit
Indoor
Unit
Remote
control
Multi-Core Cable
Outside unit
Master Slave1 Slave2
Indoor
Outside unit
Master Slave1 Slave2
Indoor
2-Core Shield Cable
Outside unit
Master Slave1 Slave2
Outside unit
Master Slave1 Slave2
Multi-Core Cable
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit Unit
Remote Remote
controller controller
Indoor
Unit Unit
Remote Remote
controller controller
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Indoor Indoor
Unit Unit
Remote Remote
controller controller
! CAUTION
• Use the 2-core shield cables for communication cables. Never use
them together with power cables.
• The conductive shielding layer of cable should be grounded to the
metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading
capacitor not only will deteriorate power factor improvement effect,
but also may cause capacitor abnormal heating. Therefore, never in-
stall a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If
it is greater the units lifespan will be reduced.
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal
block.
Round pressure terminal
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal
block. (Slack in the power wiring may cause abnormal heat.)
- When connecting cable which is the same thickness, do as shown in
the figure below.
- For wiring, use the designated power cable and connect firmly, then
secure to prevent outside pressure being exerted on the terminal
block.
- Use an appropriate screwdriver for tightening the terinal screws. A
screwdriver with a small head will strip the head and make proper
tighterning impossible.
- Over-tightening the terminal screws may break them.
! CAUTION
When the 400 volt power supply is applied to "N" phase by mistake,
check damaged parts in control box and replace them.
Control Box and Wiring Location
- Remove all of the screws at front panel and remove the panel by
pulling it forward.
- Connect communication cable between main and sub outside unit
through the terminal block.
- Connect communication cables between outside unit and indoor
units through the terminal block.
- When the central control system is connected to the outside unit, a
dedicated PCB must be connected between them.
- When connecting communication cable between outside unit and in-
door units with shielded cable, connect the shield ground to the earth
screw.
Front
Panel
25
Power cable