Rectifying faults
Checklist for rectifying faults
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099-005674-EW501
28.06.2022
Welding torch overheated
Loose welding current connections
Tighten power connections on the torch and/or on the workpiece
Overload
Check and correct welding current setting
Use a more powerful welding torch
No arc ignition
Incorrect ignition type setting.
Ignition type: Select “HF start”. Depending on the machine, the setting is defined by the change-
over switch for ignition types or the
parameter in one of the machine menus (see the “Con-
trol operating instructions”, if applicable).
Bad arc ignition
Material inclusions in the tungsten electrode due to contact with filler material or workpiece
Regrind or replace the tungsten electrode
Bad current transfer on ignition
Check the setting on the "Tungsten electrode diameter/Ignition optimisation" rotary dial and in-
crease if necessary (higher ignition energy).
Unstable arc
Material inclusions in the tungsten electrode due to contact with filler material or workpiece
Regrind or replace the tungsten electrode
Incompatible parameter settings
Check settings and correct if necessary
Pore formation
Inadequate or missing gas shielding
Check shielding gas setting and replace shielding gas cylinder if necessary
Shield welding site with protective screens (draughts affect the welding result)
Use gas lens for aluminium applications and high-alloy steels
Unsuitable or worn welding torch equipment
Check size of gas nozzle and replace if necessary
Condensation in the gas tube
Purge hose package with gas or replace
