Fronius MHP 400d G ML, 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, shiel-
ding gas available
Grounding (earthing) connection is incorrect
Establish a proper grounding (earthing) connection
There is a break in the current cable in the welding torch
Replace welding torch
Cause:
Remedy:
Cause:
Remedy:
Nothing happens when the torch trigger is pressed
Power source mains switch is on, indicators on the power source are lit up
The FSC ('Fronius System Connector' central connector) is not plug-
ged in properly
Push on the FSC as far as it will go
Welding torch or welding torch control line is faulty
Replace welding torch
Interconnecting hosepack faulty or not connected properly
Connect interconnecting hosepack properly
Replace faulty interconnecting hosepack
Faulty power source
Contact After-Sales Service
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
No shielding gas
All other functions are OK
Gas cylinder is empty
Change the gas cylinder
Gas pressure regulator is faulty
Replace gas pressure regulator
The gas hose is not connected, or is damaged or kinked
Fit gas hose, lay out straight Replace faulty gas hose
Welding torch is faulty
Replace welding torch
Gas solenoid valve is faulty
Contact After-Sales Service (arrange for gas solenoid valve to be re-
placed)
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
Cause:
Remedy:
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