Rectifying Faults; Checklist For Rectifying Faults - EWM Tetrix 451 AC/DC AW FW Operating Instructions Manual

Rectifying faults

7
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.
7.1

Checklist for rectifying faults

The correct machine equipment for the material and process gas in use is a fundamental
requirement for perfect operation!
Legend
Mains fuse triggers
 Unsuitable mains fuse

Set up recommended mains fuse > see 8 chapter.
Functional errors
 Insufficient coolant flow

Check coolant level and refill if necessary

Eliminate kinks in conduit system (hose packages)

Reset automatic cutout of the coolant pump by activating
  A ir in the coolant circuit

Vent coolant circuit > see 7.6 chapter
 Several parameters cannot be set (machines with access block)

Entry level is blocked, disable access lock > see 5.16 chapter
 All machine control signal lights are illuminated after switching on
 No machine control signal light is illuminated after switching on
 No welding power

Phase failure > check mains connection (fuses)
 Connection problems

Make control lead connections and check that they are fitted correctly.
Welding torch overheated
  L oose 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
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
"Control 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
increase if necessary (higher ignition energy).
099-000115-EW501
20.11.2017
Symbol Description

Fault/Cause

Remedy
Rectifying faults
Checklist for rectifying faults
parameter in one of the machine menus (see the
115