Control Box And Connecting Position Of Wiring - LG MULTI V IV PRO ARUN220LLN4 Installation Manual

22
Outdoor Unit
Outdoor Unit
2-Core Shield Cable
Outdoor Unit
ndoor
Unit
Remote
control
Outdoor Unit
ndoor
Unit
Remote
control
Multi-Core Cable
Outdoor Units
Master Slave1
Outdoor Units
Master Slave1
2-Core Shield Cable
Outdoor Units
Master Slave1 Slave2
r
Remote
controller
Outdoor Units
Master Slave1 Slave2
r
Remote
controller
Multi-Core Cable
Indoor Indoor
Unit Unit
Remote Remote
control control
Indoor Indoor
Unit Unit
Remote Remote
control control
Indoor Indoor
Unit Unit
Remote Remote
control control
Indoor Indoor
Unit Unit
Remote Remote
control control
Slave2
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Slave2
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Indoor Indoor
Unit Unit
Remote Remote
controller controller
! CAUTION
Outdoor Unit
• Use the 2-core shield cables for communication cables. Never use
them together with power cables.
Indoor
• The conductive shielding layer of cable should be grounded to the Unit
metal part of both units.
• Never use multi-core cable
Remote
• As this unit is equipped with an inverter, to install a phase leading control
capacitor not only will deteriorate power factor improvement effect,
Outdoor Unit
but also may cause capacitor abnormal heating. Therefore, never in-
stall a phase leading capacitor.
Indoor
• Make sure that the power unbalance ratio is not greater than 2%.
Unit
If it is greater the units lifespan will be reduced.
Remote
control
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.)
Connect same thickness
- When connecting cable which is the same thickness, do as shown in
wiring to both sides.
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.
Outdoor Units
Master Slave1 Slave2
- 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.
Outdoor Units
Master Slave1 Slave2

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 cables, connect the shield ground to the
earth screw.
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Power cable
Round pressure terminal
Power cable
It is forbidden to connect
Connect same thickness
two to one side.
wiring to both sides.
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Indoor Indoor
Unit Unit
Remote Remote
controller controller
Front Panel
It is forbidden to
It is forbidden to connect
connect wiring of
two to one side.
different thicknesses.
It i
co
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