maxiMIG 250/300
Operating manual Page 26
Malfunction/error Cause Remedy
Porous weld seam workpiece surface polluted clean surface
(paint, rust, oil, grease)
no shielding gas check / exchange
(solenoid valve not solenoid valve
opening)
insufficient shielding gas check shielding
gas at pressure
reducer
check gas line for
leakage
gas nozzle polluted clean gas nozzle
Poor weld performance 1 mains phase not check mains fuse
connected check mains cable
Wire burns back into current deficient wire feed, see chapter 15
contact tip at start of process feed rollers idling wire feed
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