What should I do if the contact tip shorts to the workpiece on the Deltaweld 452?

When the contact tip is shorted and sticks to the workpiece, the unit output automatically falls to a safe operating level. To resume operation, release the gun trigger, turn off the unit, and remove the contact tip from the workpiece. Check the contact tip and replace it if damaged, then turn the unit back on to continue welding. (Page 22)