Fronius MTG 270i US-Style Manual De Instrucciones página 44

Short service life of the contact tip
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NOTE!
In CrNi applications, greater contact tip wear may occur due to the surface finish
of the CrNi wire electrode.
Malfunction of the torch trigger
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44
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
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