Fronius MTG 2500 S Instructions De Service page 39

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  • FRANÇAIS, page 63
The welding torch becomes very hot
Cause:
Only on Multilock welding torches: torch neck union nut is loose
Remedy:
Tighten the union nut
Cause:
Welding torch operated above the maximum welding current
Remedy:
Reduce welding power or use a more powerful welding torch
Cause:
The specification of the welding torch is inadequate
Remedy:
Observe the duty cycle and loading limits
Cause:
Only on water-cooled systems: Inadequate coolant flow
Remedy:
Check coolant level, coolant flow, coolant contamination, the routing of the
hosepack, etc.
Cause:
The tip of the welding torch is too close to the arc
Remedy:
Increase stick-out
Contact tip has a short service life
Cause:
Incorrect wirefeeder rollers
Remedy:
Use correct wirefeeder rollers
Cause:
Wire electrode worn due to excessive contact pressure on the wirefeeder roll-
ers
Remedy:
Reduce contact pressure on the wirefeeder rollers
Cause:
Wire electrode contains impurities/is corroded
Remedy:
Use high-quality wire electrode with no impurities
Cause:
Uncoated wire electrode
Remedy:
Use wire electrode with suitable coating
Cause:
Wrong dimension of contact tip
Remedy:
Use a contact tip of the correct dimension
Cause:
Duty cycle of welding torch has been exceeded
Remedy:
Shorten the duty cycle or use a more powerful welding torch
Cause:
Contact tip has overheated. No thermal dissipation as the contact tip is too
loose
Remedy:
Tighten the contact tip
NOTE!
When using CrNi, the contact tip may be subject to a higher degree of wear due to
the nature of the surface of the CrNi wire electrode.
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Mtg 2100 s

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