ESAB EMP 235ic - Advanced Troubleshooting and Solutions; TIG Welding Troubleshooting; No Power or Arc Fault Diagnosis; Frequent Overheating Protection Trips

8 TROUBLESHOOTING
0463 641 001
- 33 -
© ESAB AB 2018
Type of fault Corrective action
TIG (GTAW) welding
problems
• Make sure the TIG torch is connected to the power
source: Connect the TIG torch to the negative [-] welding
terminal. Connect the welding ground cable to the positive
[+] welding terminal.
• Use only 100% Argon gas for TIG welding.
• Make sure the regulator/flow meter is connected to the
gas bottle.
• Make sure the gas pipe for the TIG torch is connected to
the gas outlet connector (M12) on the front of the power
source.
• Make sure the work clamp has proper contact with the
work piece.
• Make sure the gas bottle is opened and check the gas
flow rate on the regulator/flow meter. The flow rate should
be between 4.72–11.80l/min (1.25–3.12gpm).
• Make sure the power source is turned on and TIG welding
process is selected.
• Make sure all connections are tight and leak-free.
• See section "Lift TIG operation" in the "CONTROL
PANEL" chapter in this manual for the correct operation
steps.
No power/No arc • Check that the input power supply switch is turned on.
• Check if a temperature fault is shown on display.
• Check if system breaker is tripped.
• Check that the input power, welding and return cables are
correctly connected.
• Check that the correct current value is set.
• Check the input power supply fuses.
The overheating protection
trips frequently.
• Make sure that you are not exceeding the recommended
duty cycle for the weld current you are using.
See section "Duty cycle" in the OPERATION chapter.
• Make sure the air inlets or outlets are not clogged.