ESAB Aristo Mig 4000iw, Instruction Manual

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7 TROUBLESHOOTING
0459 419 401 - 17 - © ESAB AB 2017
7 TROUBLESHOOTING
Try these recommended checks and inspections before sending for an authorised service
technician.
Type of fault Action
No arc. • Check that the mains power supply
switch is turned on.
• Check that the welding current supply
and return cables are correctly
connected.
• Check that the correct current value is
set.
Welding current is interrupted during welding. • Check whether the thermal overload trips
have operated (indicated by the orange
lamp on the front panel).
• Check the main power supply fuses.
The thermal overload trips operate frequently. • Check to see whether the air filters are
clogged.
• Make sure that you are not exceeding the
rated data for the power source (i.e. that
the unit is not being overloaded).
Poor welding performance. • Check that the welding current supply
and return cables are correctly
connected.
• Check that the correct current value is
set.
• Check that the correct electrodes are
being used.
• Check the main power supply fuses.