tecMIG 450/600
Operating manual Page 52
Malfunction/error Cause Remedy
Porous weld seam Work piece surface polluted(paint,
rust, oil, grease)
Clean surface
No shielding gas(solenoid valve not
opening)
Check / exchange solenoid valve
or gas tube
Insufficient shielding gas Check shielding gas at pressure
reducer
Check gas line for leakage
Gas nozzle polluted Clean gas nozzle
Wire burns back into current
contact tip at start of process
Deficient wire feed, feed rollers
idling
See chapter 29
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