Lincoln Electric WIRE-MATIC 255 SVM 119-A User Manual (English)

Questions and Answers:

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Mario PetersenAug 19, 2025
Why is the Lincoln Electric WIRE-MATIC 255 SVM 119-A arc unstable?
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  Mary LeblancAug 19, 2025
  An unstable or 'hunting' arc in your Lincoln Electric Welding System can stem from several factors. Check for a worn or melted contact tip, loose connections on work and electrode cables, incorrect electrode polarity, rusty or dirty wire, or incorrect machine settings and gas for the welding process. Also, examine connections at the output terminals, choke, capacitor bank, and heavy current carrying leads, ensuring the transformer secondary leads are securely connected to the SCR Rectifier Assembly. A faulty output capacitor bank (check for loose connections or leaky capacitors) or a faulty control board could also be the cause.
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kellerstevenAug 21, 2025
What to do if my Lincoln Electric WIRE-MATIC 255 SVM 119-A stops feeding wire while welding?
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  jheathAug 21, 2025
  If your Lincoln Electric Welding System stops feeding wire during welding, first check for any mechanical restrictions in the wire feeding path, such as a clogged gun. Then, check the motor armature current. If the motor armature current is normal (1.75 amps maximum), the control board may be faulty and need replacement. If the motor armature current is high (2 to 2.5 amps) and there are no restrictions in the wire feeding path, the motor or gear box may be defective and require replacement.
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Amanda LucasAug 23, 2025
How to troubleshoot low welding output on a Lincoln Electric Welding System?
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  jlopezAug 25, 2025
  If your Lincoln Electric Welding System has low welding output, causing the wire to 'stub' and produce 'cold' welds, start by ensuring the correct wire and procedures are in use. Check the gun and work cable for loose or faulty connections, and inspect the heavy current carrying leads. Examine the output capacitor bank for loose connections or leaky capacitors, replacing them if necessary. You may also need to perform the SCR Rectifier Assembly Test and the Main Transformer Test. If these steps don't resolve the issue, the control board may be faulty and require replacement.
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fordjoshuaAug 26, 2025
What to do if there is no gas flow when gun trigger is pulled in my Lincoln Electric WIRE-MATIC 255 SVM 119-A Welding System?
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  Austin JonesAug 26, 2025
  If there's no gas flow when you pull the gun trigger on your Lincoln Electric Welding System, but wire feeds and weld voltage are present, begin by checking the gas source and hoses for leaks or kinks. If a Spool Gun adaptor is not installed, ensure the jumper plug is installed in plug J20. Check the gas solenoid by disconnecting it from the control board (Plug J8) and applying a 12 VDC external supply to the gas solenoid. If the solenoid does NOT activate, it may be faulty and need replacement. If the issue persists, the control board may be faulty and require replacement.
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Darin FernandezAug 28, 2025
Why is there no wire feed when gun trigger is pulled on Lincoln Electric WIRE-MATIC 255 SVM 119-A?
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  Joshua MunozAug 28, 2025
  If there is no wire feed when you pull the gun trigger on your Lincoln Electric Welding System, but normal open circuit voltage is present, check for a mechanical restriction in the wire feed path if the drive rolls are turning. Also, the Wire Feed Control potentiometer may be faulty. Check or replace it. The control board may also be faulty and require replacement.
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henryreynoldsAug 30, 2025
What causes a narrow or ropy weld bead with porosity in Lincoln Electric WIRE-MATIC 255 SVM 119-A Welding System?
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  Raymond MclaughlinAug 30, 2025
  A narrow or ropy weld bead with porosity, possibly with the electrode stubbing into the plate, in your Lincoln Electric Welding System could be due to several reasons. Ensure the weld procedure and electrode polarity are correct for the process being used, and verify that the shielding gas is correct and the flow is proper. Also, make sure the weld joint is not 'contaminated'. A faulty output capacitor bank may also be the cause; check for loose connections or leaky capacitors and replace if necessary. If the problem persists, the control board might be faulty and need replacement.
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edward86Sep 1, 2025
What to do if my Lincoln Electric WIRE-MATIC 255 SVM 119-A has no control of arc voltage?
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  Tyler GarciaSep 1, 2025
  If you have no control of arc voltage on your Lincoln Electric Welding System, but wire feeding is normal, the Arc Voltage Control potentiometer may be dirty. Try rotating it several times to see if it resolves the problem. The Arc Voltage Control potentiometer may also be faulty, so check or replace it. The control board may be faulty and need replacement.
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Emily StewartSep 3, 2025
What causes the welding arc to be variable and sluggish in Lincoln Electric WIRE-MATIC 255 SVM 119-A Welding System?
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  Jason WallaceSep 3, 2025
  A variable and sluggish welding arc in your Lincoln Electric Welding System may be due to loose or faulty welding cable connections. Ensure the wire feed speed, voltage, and shielding gas are correct for the process being used. The control board may be faulty and need replacement.
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Kathy ThomasSep 6, 2025
Why is the arc striking poor on my Lincoln Electric WIRE-MATIC 255 SVM 119-A?
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  Daniel TaylorSep 6, 2025
  Poor arc striking in your Lincoln Electric Welding System might be caused by loose or faulty welding cable connections. Ensure that the wire feed speed, voltage, and shielding gas are correct for the process being used. If the issue persists, the control board may be faulty and need replacement.
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Travis LynchSep 8, 2025
What causes continuous output voltage and wire feed on Lincoln Electric WIRE-MATIC 255 SVM 119-A?
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  Robert GuzmanSep 8, 2025
  If the output voltage and wire feed are present continuously or pulsing when the gun trigger is NOT activated on your Lincoln Electric Welding System, remove the gun. If the problem is resolved, the gun trigger circuit is faulty and needs repair or replacement. Also, check the machine's internal trigger leads for grounds or shorts. If these steps don't work, the control board may be faulty and require replacement.