How to Troubleshoot a Power MIG 255C

There are a number of steps you can take to troubleshoot your Power MIG 255C, such as ensuring the Power MIG 255C is properly connected to a power source.

The Lincoln company, one of the most experienced names in the field of welding, manufactures the Power MIG (metal inert gas) 255C. This product uses a solid wire feed and external gas supply to produce welds through a maneuverable contact tip and trigger mechanism. For a potentially volatile product, professionals should address any major issues but there are some troubleshooting steps you can take yourself.

Things You'll Need

• Vacuum
• Compressed air cleaner

Instructions

1. Ensure the Power MIG 255C is properly connected to a power source if, when you switch it on, there is no wire feed, weld output, gas flow or the fan does not operate when the gun trigger is pulled. Check for loose or damaged connections and reset the breaker if necessary.

2. Examine the contact tip and cable line for clogs if there is no wire feed when you pull the gun trigger, but yet gas is still flowing and the fan mechanism is working. Clean away any clogs or dirt on the contact tip and cable line if necessary.

3. Look at the area where the gun connects to the machine and visually inspect the area for any fluid leaks which indicate broken or faulty seals. This can often be the cause of low gas flow, or no gas flow at all. Have an expert replace any broken seals.

4. Clean the machine thoroughly with a low pressure compressed air unit. Dirt can clog the mechanisms and cause the machine to overheat and cease working. Vacuum any visible dirt from the gearbox and wire feed section too.

5. Weld at a lower duty cycle if there is no gas flow when you pull the trigger, as the thermostat may have tripped due to overheating and a lower duty cycle lowers the chances of more incidences of overheating.

References

• Oxejalsa: Power MIG 255C
• Weldingmart Lincoln Power Mig 140, 180 Models: Operator's Manual