Firstly, it is important to note that when inspecting the internal or external terminals of the welding machine, it is necessary to turn off the input power switch before proceeding.
1. Regularly carry out testing work. For example, check whether the cooling fan rotates smoothly when the welding machine is powered on; Is there any abnormal vibration, sound, or odor occurring; Is there any gas leakage; Check for any looseness or peeling of the joints and insulation of the welding wire; Whether there is any abnormal heating phenomenon in the welding cable and various wiring parts.
2. Due to the forced air cooling of the welding machine, it is easy to inhale dust from the surroundings and accumulate inside the machine. So we can regularly use clean and dry compressed air to blow and wipe away the accumulated dust inside the welding machine. Especially the gaps and gaps between transformers, reactance coils, and coil coils, as well as power semiconductors, should be thoroughly cleaned.

 

3. Regularly inspect the wiring locations of power lines. Check if the wiring screws on the input side, output side, and other terminals, as well as the connection parts of external wiring and internal wiring, are loose. When rusting occurs, remove the rust to ensure good contact conductivity.
4. Long term use of welding machines can inevitably cause deformation and rusting of the casing due to contact, resulting in damage to the internal parts. Therefore, comprehensive repair work such as replacing defective parts, repairing the casing, and strengthening insulation deterioration areas should be carried out during annual maintenance and inspection. It is best to replace all defective parts with new ones during maintenance to ensure the performance of the welding machine.
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