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7 FAULT-TRACING
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
Welding torch becomes too
hot
No trigger function
Wire burnt back on the
contact tip at stop
Irregular wire feed
Short arc between the gas
nozzle and workpiece.
Variable arc
Porous welds
0458 870 201
Cause
•
Contact tip is not tight
enough.
•
Electrical connections to
the welding torch and to
the workpiece.
•
Control cable
interrupted/faulty.
•
Wrong burn back time
set.
•
Worn contact tip.
•
Liner blocked.
•
Contact tip and wire
diameter do not match.
•
Wrong tension set on the
wire feed unit.
•
Spatter bridge between
the contact tip and gas
nozzle.
•
Contact tip is worn or
does not match the wire
diameter.
•
Incorrect welding
parameters set.
•
Liner worn.
•
Large amount of spatter
in the gas nozzle.
•
Insufficient or total lack of
shielding gas.
•
Draught is disturbing the
shielding gas.
- 14 -
Solution
•
Check and tighten.
•
Check and tighten.
•
Check/repair.
•
Decrease the burn back
time.
•
Replace.
•
Blow through in both
directions.
•
Replace contact tip.
•
Correct according to
manufacturer's
instructions.
•
Clean and spray the
inside of the gas nozzle.
•
Check/replace the
contact tip.
•
Correct the welding
parameters.
•
Replace the wire liner.
•
Clean the gas nozzle.
•
Check contents of the
gas bottle/hoses and the
pressure setting.
•
Shield welding area with
protective screens.
© ESAB AB 2014
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