LG Electronics PRHR040 Efficiency, Components fully protected from the elements, Back-up function

61799 LG Multi V Catalogue 4/5/07 2:17 pm Page 20

Efficiency

uses the cutting edge artificial intelligence (known as ‘fuzzy control’) to obtain efficient operation and reduce noise.

Components fully protected from the elements

1.Electrical and mechanical parts are totally sealed in their enclosures.

2.Separated equipment space between compressors/control boxes, and heat exchangers.

3.Because the electrical and mechanical parts are sealed in their own enclosures, this makes them much more resistant to environment factors which can cause corrosion (such as dust and rain) - thus improving the lifetime of the outdoor unit.

Alternate compressor cycling / back-up function

1. Duty-cycling function

alternates several compressors conditionally to elongate product life span.

to meet diverse load in operation

1.inverter + constant speed 2 - inverter only

2.inverter + constant speed 3 - inverter only

3.inverter + constant speed 1 - inverter only

Heat exchanger

Safety cover

Normal running conditions

inverter	const.	const.	const.
	speed 1	speed 2	speed 3

MULTI compressor system with longer life cycle for each compressor due to alternate operation

2. Back-up function

can accommodate back up compressor operation when one compressor fails to raise product reliability.

to back up when constant speed compressor 2 is out of order

1.inverter + constant speed 2 (out of order)

2.inverter + constant speed 1 (back up operation)

Compressor failure situation

inverter	const.	const.	const.
	speed 1	speed 2	speed 3

Alternative compressor starts to run

20 _ Air conditioning system