(1) A gun hit occurred. It may be due to the deviation of the workpiece assembly or the inaccurate TCP of the welding torch. You can check the assembly situation or correct the TCP of the welding torch.
(2) An arc fault occurs and the arc cannot be started. It may be that the welding wire does not touch the workpiece or the process parameters are too small. You can manually feed the wire to adjust the distance between the welding gun and the weld, or adjust the process parameters appropriately.
(3) Shield gas monitoring and alarm. If the cooling water or protective gas supply is faulty, check the cooling water or protective gas pipeline.