Fronius MTG 320i, Operating Instructions Manual

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Troubleshooting
Troubleshooting No welding current
Power source mains switch is on, indicators on the power source are lit up, shielding gas
available
Cause: Grounding (earthing) connection is incorrect
Remedy: Establish a proper grounding (earthing) connection
Cause: There is a break in the current cable in the welding torch
Remedy: Replace welding torch
Nothing happens when the torch trigger is pressed
Power source mains switch is on, indicators on the power source are lit up
Cause: The FSC ('Fronius System Connector' central connector) is not plugged in
properly
Remedy: Push on the FSC as far as it will go
Cause: Welding torch or welding torch control line is faulty
Remedy: Replace welding torch
Cause: Interconnecting hosepack faulty or not connected properly
Remedy: Connect interconnecting hosepack properly
Replace faulty interconnecting hosepack
Cause: Faulty power source
Remedy: Contact After-Sales Service
No shielding gas
All other functions are OK
Cause: Gas cylinder is empty
Remedy: Change the gas cylinder
Cause: Gas pressure regulator is faulty
Remedy: Replace gas pressure regulator
Cause: The gas hose is not connected, or is damaged or kinked
Remedy: Fit gas hose, lay out straight Replace faulty gas hose
Cause: Welding torch is faulty
Remedy: Replace welding torch
Cause: Gas solenoid valve is faulty
Remedy: Contact After-Sales Service (arrange for gas solenoid valve to be replaced)