6 TROUBLESHOOTING
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© ESAB AB 2020
6 TROUBLESHOOTING
6.1 General
Equipment
• Instruction manual for included parts.
Check
• That the power supply is connected for the correct mains supply.
• That all three phases are supplying the correct voltage (phase sequence is not
important).
• That welding cables and connections are not damaged.
• That the controls are correctly set.
• That the mains supply is disconnected before starting repairs.
6.2 Possible errors
1. Symptom Current and voltage readings show large fluctuations
Cause 1.1 Contact jaws or nozzle are worn or wrong size.
Action Replace contact jaws or nozzle.
Cause 1.2 Wire feed roller pressure is inadequate.
Action Increase pressure on wire feed rollers.
2. Symptom Wire feed is uneven
Cause 2.1 Pressure on wire feed rollers is incorrectly set.
Action Adjust pressure on wire feed rollers.
Cause 2.2 Wire feed rollers are of the wrong size.
Action Replace wire feed rollers.
Cause 2.3 Grooves in wire feed rollers are worn.
Action Replace wire feed rollers.
3. Symptom Welding cables are overheating
Cause 3.1 Poor electrical connection.
Action Clean and tighten all electrical connections.
Cause 3.2 Cross-sectional area of welding cables is too small.
Action Use cables with a larger cross-section or use parallel cables.
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