Troubleshooting - ESAB Mig 4004i Instruction Manual

7 TROUBLESHOOTING

7 TROUBLESHOOTING
Try these recommended checks and inspections before sending for an authorised service
technican.
Type of fault
No arc.
Welding current is interrupted during welding
The thermal overload trips operate frequently
Poor welding performance.
0463 279 101
Corrective action
• 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.
• Check whether the thermal overload trip
has operated (indicated by the orange
lamp on the front)
• Check the main power supply fuses.
• 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).
• Check that the welding current supply
and return cables are correctly
connected.
• Check that the correct current value is
set.
• Check that the correct welding wires
are being used.
• Check the main power supply fuses.
- 19 - © ESAB AB 2018