LG ARUM080LTE5 Engineering Product Data Book page 745

Multi V 5
8. Electrical Wiring
8.1 Electrical Wiring
8.1.1 Caution
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring
regulations and guidance of each electric power company.
CAUTION
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.
2. Install the Outdoor Unit communication line 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.)
3. Be sure to provide designated grounding work to Outdoor Unit.
CAUTION
Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
4. 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.
5. Never connect the main power source to terminal block of communication line. If connected, electrical parts will
be burnt out.
6. Use 2-core shield cable for communication line.(O mark in the figure below) If communication lines of different
systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause
erroneous operations. (
7. Only the communication line specified should be connected to the terminal block for Outdoor Unit
communication.
Master Slave1 Slave2 Slave3
Master Slave1 Slave2 Slave3
2-Core Shield Cable
CAUTION
• Use the 2-core shield cables for communication lines. 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.
34
mark in the figure below)
Indoor Indoor
Unit Unit
Remote
Remote
control
control
Indoor Indoor
Unit Unit
Remote Remote
control control
Installation of Outdoor Units
Master Slave1 Slave2 Slave3
Master Slave1 Slave2 Slave3
Multi-Core Cable
Indoor Indoor
Unit Unit
Remote Remote
control control
Indoor Indoor
Unit Unit
Remote Remote
control control