Kemppi MASTERTIG AC/DC 2000 Operation Instructions Manual

Also see for MASTERTIG AC/DC 2000: Service manual

14 – Mastertig AC/DC 2000, 2500, 2500W, 3500W/0510 © COPYRIGHT KEMPPI OY3.1. NUMERICAL DISPLAYS AND SIGNAL LIGHTS OF THE PANELMachine on Heat protection Wrong mains voltage, over or under-voltageDisplay ofwelding currentor set valuecurrentDisplay ofwelding voltageor parametersUnits of the displayThe signal light of thermal protection is on when the machine has over-heated. Let the machine on sothat the fan will cool the machine. Wait until the light goes off, and you can continue welding.The light for the wrong voltage turns on if the mains voltage is too high or too low. Check the voltagesetting of the machine and/or the mains voltage. The wrong voltage light will also turn on if there is amomentaneous over-voltage in the mains supply.The current is displayed with a tolerance of 3 % ± 2 A; the voltage with a tolerance of 3 % ± 0.2 V.3.2 USE OF THE REMOTE CONTROLThe remote control is selected from the key REMOTE. Withthe remote control you can adjust the welding current of MMAand TIG welding. The values of the parameters (up-slope anddown-slope times, gas flow times etc.) are adjusted from thecurrent knob.With remote control unit C 100AC you can also change thewelding method (MMA / TIG). The machine selects the polarity(type of current) in accordance with an advance selection onthe panel.3.3. MMA WELDING3.3.1. Selection of type of currentSelect MMA welding by pressing the selection key of MMA welding. The signal light of thetype of current indicates the current type selected: AC, DC-, DC+.Change the current type by pressing the MMA selection key again and the current type willchange and the signal light will show the current type selected.3.3.2. Broken arc methodPress the BROKEN ARC key and the signal light for broken arc method turns on.A broken arc method has to be used if the seam to be welded cannot tolerate the heat of acontinuous arc. The heat of the welding is controlled by breaking the arc. Usually the reason isthin material or various fittings. In the broken arc method position, the arc breaks faster and theignition pulse is smaller then in ordinary MMA welding.