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
