● When carrying out maintenance, wait more than three minutes after powering off all input power supply by turning off the line disconnect switch in the switch box. The capacitor may be discharging even after powering off all input power supply. Check to make sure that charging voltage does not exist before carrying out maintenance.
● This welding power source uses a high-frequency inverter system, be careful of accidental connection of the line disconnect switch at input side.
● Have qualified operators or the persons familiar with this welding power source test the withstand voltage. And install a protective wall around the welding power source to keep others away from the welding power source.