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Melissa ParsonsAug 8, 2025
What to do if Unitor UWI 500 TP has no output and yellow warning light is on?
- LLarry MorrisAug 8, 2025
If your Unitor Welding System shows no output and a yellow warning light, it could be due to several reasons. First, check the vessel's power supply for blown fuses or loose connections, as one phase might be missing. If the thermal protection is activated from overuse, allow the machine to cool down, then weld with more breaks or at a lower current. Ensure that the cooling airflow isn't blocked. Inspect electrode holder or ground cable connections for heat development due to looseness. Also, a broken fan may be the reason, so repair or replace it. Lastly, too much dirt in the power source compartment may cause this, so clean it.
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