Fronius MTG 270i - Page 49

Welding torch gets very hot
Welding torch has been operated above the maximum welding current
Reduce welding power or use more powerful welding torch
Welding torch is inadequately sized
Observe duty cycle and load limits
For water-cooled systems only: Coolant flow too low
Check coolant level, coolant flow, coolant contamination, displacement of
the hosepack, etc.
Tip of the welding torch too close to the arc
Increase stick out
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Short service life of the contact tip
Incorrect feed rollers
Use correct feed rollers
Wear of the wire electrode due to excessive contact pressure at the feed
rollers
Reduce contact pressure at the feed rollers
Wire electrode soiled/rusted
Use high-quality wire electrode without soiling
Uncoated wire electrode
Use wire electrode with suitable coating
Incorrect dimensions of the contact tip
Use contact tip of the correct size
Duty cycle of the welding torch too long
Reduce duty cycle or use more powerful welding torch
Contact tip overheats. No heat dissipation due to contact tip being fitted too
loosely
Tighten contact tip
NOTE!
In CrNi applications, greater contact tip wear may occur due to the surface finish
of the CrNi wire electrode.
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Malfunction of the torch trigger
Faulty plug connections between the welding torch and the power source
Establish correct plug connections/send power source or welding torch to
service team
Soiling between torch trigger and torch trigger housing
Remove soiling
Faulty control line
Notify service provider
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