Janani cool care

This is more than likely caused by a lack of power but could indicate other problems too..

Lg AC Thermostat not set properly
Lg AC Emergency switch or shut-off switch turned off
Lg AC Blown fuse in panel box
Lg AC Circuit breaker tripped or off
Lg AC Outdoor disconnect turned off
Lg AC Off on outdoor reset button
Lg AC Unit locked out (reset by turning off then turning back on)