7 FAULT-TRACING
0458 870 201
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© ESAB AB 2014
7 FAULT-TRACING
Please also read the operating instructions for the welding components, e.g. power source
and wire feed unit.
If the measures described below are not successful, consult your dealer or the manufacturer.
Problem Cause Solution
Welding torch becomes too
hot
• Contact tip is not tight
enough.
• Electrical connections to
the welding torch and to
the workpiece.
• Check and tighten.
• Check and tighten.
No trigger function • Control cable
interrupted/faulty.
• Check/repair.
Wire burnt back on the
contact tip at stop
• Wrong burn back time
set.
• Worn contact tip.
• Decrease the burn back
time.
• Replace.
Irregular wire feed • Liner blocked.
• Contact tip and wire
diameter do not match.
• Wrong tension set on the
wire feed unit.
• Blow through in both
directions.
• Replace contact tip.
• Correct according to
manufacturer's
instructions.
Short arc between the gas
nozzle and workpiece.
• Spatter bridge between
the contact tip and gas
nozzle.
• Clean and spray the
inside of the gas nozzle.
Variable arc • Contact tip is worn or
does not match the wire
diameter.
• Incorrect welding
parameters set.
• Liner worn.
• Check/replace the
contact tip.
• Correct the welding
parameters.
• Replace the wire liner.
Porous welds • Large amount of spatter
in the gas nozzle.
• Insufficient or total lack of
shielding gas.
• Draught is disturbing the
shielding gas.
• Clean the gas nozzle.
• Check contents of the
gas bottle/hoses and the
pressure setting.
• Shield welding area with
protective screens.
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