Janani cool care

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

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