23. Trouble-shooting
Malfunction/ Error
mains voltage connected and
master switch in pos.´ON´/
mains Control is not lit
Wire buckling between wire feed
rollers and guide tube
Irregular wire feed
Porous weld seam
Operating manual
Any remedial action to defective electrical equipment must be carried out by a
qualified electrician!
Cause
loss of supply voltage
excessive contact pressure of wire
feed rollers
distance between wire feed rollers
and guide tube too far
bad uncoiling of wire
wire-holding arbour runs heavily
wrong wire feed roller
dirty / defective wire guide tube or
spiral
clogged / defective current contact
tip
dirty / rusty welding wire
wire guide tube misaligned with
wire feed roller groove
work piece surface polluted (paint,
rust, oil, grease)
no shielding gas (solenoid valve
not opening)
insufficient shielding gas
gas nozzle polluted
ProPuls 330,400,500
Remedy
Check mains fuse,
Check mains cable
see chapter 20 Wire feed
check distance / realign guide tube
check / refit wire coil
check wire-holding arbour
see chapter 20 Wire feed
see chapter 20 Wire feed
clean / exchange current contact
tip
exchange welding wire
see chapter 20 Wire feed
clean surface
check / exchange solenoid valve
check shielding gas at pressure
reducer
check gas line for leakage using
meter tube
clean gas nozzle
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