Electrical Wiring; Caution - LG MULTI V 5 ARUM160LTE5 Installation Manual

Master Slave1 Slave2
Master Slave1 Slave2

CAUTION

!
• Use the 2-core shielded wires 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
install 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.
Indoor Indoor
Unit Unit
Remote Remote
control control
Indoor Indoor
Unit Unit
Remote Remote
control control
Power cable

ELECTRICAL WIRING

Caution
- Follow ordinance of your governmental organization for technical
standard related to electrical equipment, wiring regulations and
guidance of each electric power company.
WARNING
!
Be sure to have authorized electrical engineers do the electric
work using special circuits in accordance with regulations and this
installation manual.
If power supply circuit has a lack of capacity or electric work
deficiency, it may cause an electric shock or fire.
- Install the Outdoor Unit communication cable away from the power
source wiring so that it is not affected by electric noise from the power
source. (Do not run it through the same conduit.)
- Be sure to provide designated grounding work to Outdoor Unit.
CAUTION
!
Be sure to correct the outdoor unit to earth. Do not connect ground
wire to any gas pipe, liquid pipe, lightening rod or telephone earth
line. If earth is incomplete, it may cause an electric shock.
- Give some allowance to wiring for electrical part box of Indoor and
Outdoor Units, because the box is sometimes removed at the time of
service work.
- Never connect the main power source to terminal block of
communication cable. If connected, electrical parts will be burnt out.
- Use the 2-core shielded wires for communication cable.(
the figure below) If communication cable of different systems are
wired with the same multiplecore cable, the resultant poor
transmitting and receiving will cause erroneous operations. (
in the figure below)
- Only the communication cable specified should be connected to the
terminal block for Outdoor Unit communication.
2-core shielded cables
1Unit 2Unit 3Unit
Master Slave1 Slave2 Slave3
Master Slave1 Slave2 Slave3
mark in
4Unit
Indoor Indoor
Unit Unit
Remote
Remote
control
control
Indoor Indoor
Unit Unit
Remote Remote
control control
33
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