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8 TROUBLESHOOTING
8
TROUBLESHOOTING
Perform these checks and inspections before sending for an authorised service technician.
Type of fault
MMA welding problems
TIG welding problems
No arc
Welding current is
interrupted during welding
The thermal protection
trips frequently
The maximum current
setting is limited to 200 A
0463 416 101
Corrective action
•
Check that the welding and return cables are not damaged
and that they are correctly connected to the power source.
•
Make sure the return clamp has proper contact with the
work piece.
•
Check that the correct electrodes and polarity are being
used. For polarity, check electrode packaging.
•
Check that the correct current value is set.
•
Adjust Arc Force and Hot start.
•
Check that the welding and return cables are not damaged
and that they are correctly connected to the power source.
•
Make sure the return clamp has proper contact with the
work piece.
•
Make sure the TIG torch lead is connected to negative
welding terminal.
•
Make sure the correct shielding gas, gas flow, welding
current, filler rod placement, electrode diameter and
welding mode on power source is used.
•
Make sure the gas valve on the TIG torch is on.
•
Check that display is on to verify that the power source
has power.
•
Check setting panel display correct values.
•
Check that the mains power supply switch is turned on.
•
Check that the mains, welding and return cables are
correctly connected.
•
Check the mains power supply fuses.
•
Check whether the overheating light (thermal protection)
at setting panel is on.
•
Continue with fault type "No Arc".
•
Make sure the recommended duty cycle for the weld
current has not been exceeded.
See section "Duty cycle" in the TECHNICHAL DATA
chapter.
•
Make sure the air inlets or outlets are not clogged.
•
Clean inside machine according to routine mainteance.
•
Check and clean the cooler.
•
Check that the power source is connected to 3-phase
mains power supply.
•
Check the mains power supply fuses.
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© ESAB AB 2022
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