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Dynamic water cooling ensures optimal temperature control and power efficiency. Depending on the welding power level and duration, the power source cooling fans moderate air flow and cooler motor run time between 15 seconds and 4 minutes, reducing electrical power consumption and localised noise levels.
Kemppi 3 Year Global Parts & Labour Warranty
Practical answers on identifying, fitting and looking after the internal and external spare parts of a TIG welding unit.
On the machine itself, the parts most often replaced are those that are handled or plugged in repeatedly: output and control sockets, gas couplings, switches and levers, handles and covers. Internal electronics such as circuit boards more often fail through overheating, damage or electrical faults than ordinary wear.Makers advise daily checks of the torch parts and the tightness of the welding and earth cable connections, and replacement of damaged or worn parts and cables. Because wear depends on how the machine is used and where, the manual and a careful look at the machine are better guides than a fixed schedule.
Welding makers warn that a loose connection causes overheating, rapid deterioration and loss of efficiency, and that power connections can work loose and oxidise with frequent, large changes in temperature. Look for discolouration, melted or distorted plastic, a connector that moves in its socket, or a plug that is warm after welding.Switch off and isolate the machine, then check that the plug seats and locks fully and clean any dirt from the outside. If a socket shows heat damage or the contacts are worn, have the part replaced rather than just cleaned, and make sure a competent person does any work inside the machine.
Isolate it from every supply first, not just switch it off: unplug it from the mains, or for a unit fed from a separate welding power source, disconnect that supply as well. The HSE advises switching off and unplugging equipment before cleaning or adjusting it, and makers say to disconnect before handling electric cables or carrying out maintenance.Some inverter makers also say to wait for stored energy in capacitors to discharge before opening the case. The wait is machine-specific, so follow the manual. If you cannot be sure the unit is safe, do not open it. Work inside a power source is for a competent person and should be covered by your risk assessment.
Work inside a welding power source should be done by a competent person: someone with the training, skill and knowledge to do the task safely on that type of equipment. The HSE says repairs to electrical equipment should be carried out only by a competent person, and that faulty equipment should be taken out of use and checked. Some makers recommend that regular inspection and cleaning is done by an authorised service agent.After a repair, the machine should be tested as the maker or the relevant standard requires. The standard for periodic inspection and testing of arc welding equipment also covers testing after repair.
