8 TROUBLESHOOTING
0447 209 001
- 32 -
© ESAB AB 2022
8
TROUBLESHOOTING
Perform these checks and inspections before sending for an authorised service technician.
Type of fault
Corrective action
MMA welding problems
Check that the welding and return cables are correctly connected on
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.
TIG welding problems
Check that the welding and return cables are correctly connected on
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.
No arc
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.
Welding current is
interrupted during welding
Check whether the thermal protection trip has operated (indicated by
LED on Overtemperature indicator on Control panel).
Check the mains supply fuses.
The thermal protection trips
frequently
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 maintenance.
Check and clean the cooler
The maximum current setting
can't reach 410 A
Check that the power source is connected to 3-phase mains power
supply
Check the mains power supply fuses.
