Debugging burned out TRIAC for vacuum cleaner motor speed control (inductive load)
2000W on 200V power is 10A. If your power is 100V it's 20A!
You need to have a large heatsink or a smaller one with a fan for the triac to operate for long. It will be dissipating around 10W/20W. Without a heatsink at TO-220 can safely dissipate less than a watt.