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2. No reaction when torch trigger is actuated
Mains switch is ON, relevant operating status LED and digital displays are lit up, but LED
displays (9), (10), (12) do not light up when trigger is pulled back
Cause:
Torch control plug is not plugged in, or the plug-in connection is faulty
Remedy:
Plug in the control plug and secure it, check connection, replace if neces-
sary
Cause:
Torch switch (micro-switch) or torch control line is faulty
Remedy:
Repair or replace torch
Cause:
The "Power ON" reset time after switch-on (10 sec) has not yet elapsed
Remedy:
After switching on the mains switch, wait for about 10 sec before starting
to weld
3. No welding current
Mains switch is ON, relevant operating status LED and digital displays are lit up, LED
displays (9), (10), (12) light up when the trigger is pulled back. HF and shielding gas are
present
Cause:
Earth cable is not connected
Remedy:
Clamp the earth cable to the workpiece
Cause:
Earth cable is plugged into wrong current socket
Remedy:
Plug the earth cable into the
Cause:
Torch is faulty
Remedy:
Change the torch
Cause:
Short circuit in welding-current circuit in electrode welding mode (longer
than 1 sec.)
Remedy:
Eliminate the short circuit in the welding-current circuit
4. No welding current
Mains switch (1) is ON, relevant operating status LED is lit up, digital displays (2) and (3)
are signaling t - S e.g.: 8 1 °C (Overtemp. Sec.)
Cause:
Max. duty cycle has been exceeded or fan is faulty (Display is signaling
secondary overtem-perature) t - S
Remedy:
Allow the machine to cool -> do not switch off, check working of fan
Cause:
Cooling air-stream is insufficient
Remedy:
Ensure adequate supply of cooling air
Ursache:
Primary module is very dirty
Remedy:
Open up the machine and blast clean with dry compressed air
5. Arc sometimes breaks (in manual electrode)
Cause:
Arc-drop voltage of electrode is too high
Remedy:
Use an alternative electrode if possible
6. No shielding gas
all other functions are OK
Cause:
Gas cylinder is empty
Remedy:
Change the gas cylinder
Cause:
Pressure regulator is defective
Remedy:
Change the regulator
Cause:
Gas hose is not connected, or is faulty
Remedy:
Connect the gas hose, replace faulty hose
socket and secure it
31
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