Been using a Miller 350 sync for 14 years on this property off of a 100 amp breaker in the panel, to a 100 amp disconnect just for the welder. A week ago the 350 stopped throwing an arc, so I put in for repairs and bought a Miller 250 sync for back up. I'll run the 250 about 30 min. , welding 3/16" aluminum with machine set at 165 amps then the panel breaker trips and is very hot. I'll let it cool down for 30 min. , try it again, happens again.
Using a Miller Coolmate water cooler and CK 300 water cooled torch with a hand slide remote control.
I "NEVER" had this happen with the 350 sync. Appreciate your input to fix this .
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