Stick welder shut off
If it restarted shortly after cooling, you may have exceeded the duty cycle. The duty cycle on the spec sheet lists it as 65% @ 110 amps and 35% @ 140 amps. What this means is at max power you can weld for you can weld for 3.5 minutes then it is required to let it rest for 6.5 minutes before resuming.  If you exceed the limits the unit shuts off to prevent overheating or damage.