Smart Inverter Compressor The new range of LG Frost Free Refrigerators with cutting edge Smart Inverter Compressor technology that takes energy efficiency to another level and helps you save more. Not only this, it comes with 10 year warranty and provides super silent operation. Smart Diagnosis LG's Smart Diagnosis is a fast and easy way to troubleshoot issues. Simply call the LG Customer Service Helpline and place the phone on the appliance. The appliance then communicates with a computer that produces a diagnosis within seconds and provides an immediate solution