Jackle tecMIG 450 Betriebsanleitung Seite 54

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