7 TROUBLESHOOTING
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© ESAB AB 2020
7
TROUBLESHOOTING
Perform these checks and inspections before sending for an authorised service technician.
• Check that the mains voltage is disconnected before starting any type of repair action.
Type of fault
Corrective action
MMA welding problems
Check the welding process is set for MMA.
Check that the welding and return cables are correctly
connected to the power source.
Make sure that the return clamp has good contact with the
workpiece.
Check that the correct electrodes and polarity are being used.
For polarity, check electrode packaging.
Check that the correct Welding current (A) is set.
Adjust Arc Force and Hot start.
TIG welding problems
Check the welding process is set for Live TIG as necessary.
Check that the TIG torch and return cables are correctly
connected to the power source.
Make sure that the return clamp has good contact with the
workpiece.
Make sure that the TIG torch lead is connected to the negative
welding terminal.
Make sure that the correct shielding gas, gas flow, welding
current, filler rod placement, electrode diameter and welding
mode on power source is used.
Make sure that the gas valve on the TIG torch is ON.
No arc
Check that the electrical power supply switch is turned on.
Check that the display is on to verify that the power source has
power.
Check that the setting panel is displaying correct values.
Check that the welding and return cables are correctly
connected.
Check the electrical power supply fuses.
Welding current is
interrupted during welding
Check whether the Over Temperature LED (Thermal Protection)
on the setting panel is on.
Continue with Troubleshooting “No Arc”.
The thermal protection
trips frequently
Make sure that the recommended duty cycle for the weld
current has not been exceeded.
Refer to power source “Duty cycle” section in
Make sure that the air inlets or outlets are not clogged.
Clean the inside of the machine using routine maintenance
methods.
