ESAB Mig C420, Instruction Manual

Page: 77 / 239

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C420e
8 FAULT TRACING
Try these recommended checks and inspections before sending for an authorised service technican.
Type of fault Actions
No arc S Check that the mains power supply switch is turned on.
S
Check that the welding current supply and return cables are
correctly connected.
S Check that correct current value is set.
Welding current is interrupted
during welding
S Check whether the thermal overload trip has operated
(indicated by the orange lamp on the front).
S Check the main power supply fuses.
Thermal overload trips
operate frequently
S
Check to see whether the air filters are clogged.
S
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 S Check that the welding current supply and return cables are
correctly connected.
S Check that the correct current value is set.
S
Check that the correct welding wires are being used.
S Check the main power supply fuses.
S Check the wire feed unit – if proper rolls are applied and
properly set the pressure of the wire feeder’s pressure rollers
9 ORDERING OF SPARE PARTS
ESABMig C420 is designed and tested in accordance with the international and Euro-
pean standards IEC/EN 60974–1 and EN 50199. It is the obligation of the service unit
which has carried out the service or repair work to make sure that the product still
conforms to the said standard.
Spare parts may be ordered through your nearest ESAB dealer, see the last page of
this publication.
GB