EWM WEGA 451 - Operating Problems, Causes, and Remedies; Customer Troubleshooting Checklist; Resetting Control and Machine Type Setting

Operating problems, causes and remedies
Customer checklist
74 Item No.: 099-004934-EWM01
9 Operating problems, causes and remedies
9.1 Customer checklist
Error Possible cause Remedy
Spatter has blocked the
contact nozzle
Clean nozzle, spray on separating agent
Feed roller is slipping Check contact pressure roller. Check for
wear and tear and replace if necessary
Wire feed motor is not turning
over
Check automatic cut-out on the wire feed
motor
Wire bent Unfasten contact nozzle, cut off wire after
bent section
Wire coil brake too strong Set coil brake correctly
No wire feed
Torch defective Replace
Core or nozzle blocked Clean, replace if necessary Loop in wire
Tube package bent too much Stretch out tube package
Wire feed coils blocked or
damaged
Clean, replace if necessary
Wire coil brake too strong Set coil brake correctly
Wire feed irregular
Contact nozzle too small Check, replace if necessary
Incorrect shielding gas setting Correct: Rule of thumb "Wire diameter *10 =
flow in l/min"
Gas cylinder empty Change
Electrode is projecting too far
forwards
Move torch closer to weld seam
Air current Shield welding area
Poor wire quality Use high quality wire, store in a dry and
clean location.
Very dirty workpiece Clean workpiece first
Local overheating of the
workpiece
Include occasional pauses in welding to
allow the workpiece to cool down.
Weld seam porous
Gas line is drawing in air Check seal tightness on lines, seal / replace
if necessary.
No mains voltage Check the mains fuses, replace as
necessary
Machine will not switch
on
Power source faulty Contact service
Blow effect Connect workpiece line more appropriately Strong spatter
No gas Set gas quantity to match the application
Workpiece line has no or poor
contact
Check connection No welding current
Power source overheating Allow machine to cool down
Wire feed or gas valve
faulty
Electronic control Check line connections, replace electronics
if necessary. Contact service
9.2 Resetting the control (Reset all)
NOTE
M2.40 control
The first action should always be to check and if necessary correct the machine type setting.