LG Electronics PRHR040 manual Outdoor unit, Why inverter ?, Non-polarised communication wiring

61799 LG Multi V Catalogue 4/5/07 2:16 pm Page 13

Outdoor unit

Outdoor unit

incorporates inverter compressor and fan motors.

Why inverter ?

-Higher efficiency

-Reduced operation noise

-Less vibration

-Enhanced capacity control

Automatic addressing between outdoor and indoor units

The addressing between outdoor unit and indoor units is carried out by the touch of a button. When the addressing is complete, the system is ready to run.

Manual addressing

Auto addressing

Indoor unit Indoor unit Indoor unit

Indoor unit Indoor unit Indoor unit

Wired remote	Wired remote	Wired remote
control	control	control

Wired remote	Wired remote	Wired remote
control	control	control

Non-polarised communication wiring

The communication wiring can be installed polarised, non-polarised, or a combination of the two, and the outdoor unit will sort out the mistakes during automatic addressing.

Polarity connection

Outdoor	Indoor	Indoor
unit	unit 1	unit 2

Outdoor unit control box

indoor outdoor

Non-polarity connection

Outdoor	Indoor	Indoor
unit	unit 1	unit 2

Outdoor unit control box

unit unit

central controller

indoor outdoor central controller

E F C D Vcc GND

unit unit

E F C D Vcc GND

indoor unit 1 indoor unit 2 •••

indoor unit 1 indoor unit 2 ° ° °

Air conditioning system _ 13