Rectifying faults
Checklist for rectifying faults
099-007010-EW501
07.09.2016
37
6
Rectifying faults
All products are subject to rigorous production checks and final checks. If, despite this, something fails to
work at any time, please check the product using the following flowchart. If none of the fault rectification
procedures described leads to the correct functioning of the product, please inform your authorised
dealer.
6.1
Checklist for rectifying faults
Legend
Symbol
Description
Fault/Cause
Remedy
The correct machine equipment for the material and process gas in use is a fundamental
requirement for perfect operation!
No arc ignition
Incorrect ignition type setting.
Ignition type: Select “HF start”. Depending on the machine, the setting is defined by the
changeover switch for ignition types or the
parameter in one of the machine menus (see the
“Control operating instructions”, if applicable).
Excess temperature signal light / Welding torch cooling failure is on
Welding torch cooling failure
Check correct connection of the welding torch cooling unit
Check operational readiness of the welding torch cooling unit
Eliminate kinks in conduit system (hose packages)
Check coolant level and refill if necessary
Excess temperature, welding machine
Allow the machine to cool down whilst still switched on
Welding torch overheated
Loose welding current connections
Tighten power connections on the torch and/or on the workpiece
Tighten contact tip correctly
Overload
Check and correct welding current setting
Use a more powerful welding torch
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 (hydrogen) in the gas tube
Purge hose package with gas or replace
