Hello, I am new to 3D printing and as a recent birthday gift I received an FLSUN i3 auto leveling system with dual Z motors. Building the printer was pretty self explanatory till I get to the wiring. I seem to be having an issue with the power unit though. I went to plug in the power unit and I either keep popping fuses, or sparks will come out of the outlet itself. I did switch the power unit to the 110v. Any ideas what could be causing this? I checked my circuit breakers, and all are 120v circtuits throughout the house. Any help is appreciated and looking forward to learning more. Thanks