High cost and complexity of repair.

High cost and complexity of repair. The principle of the design of inverters for welding metals involves the presence of a basic power unit — a module of powerful IGBT transistors. Going out of this “inverter heart” will require repairs worth from 30 to 60 (!) interest on the price of a new apparatus. It is good if the breakdown occurred during the warranty period, then the costs will only affect the replacement time and nerves for its provision. Extraurranty repairs of the IGBT unit will be expensive, and replacing branded power transistors with their handicraft Chinese analogues — a uniform sentenced for the failed apparatus.