maxiMIG 250/300
Operating manual
Page 25
19. Trouble-shooting
Any remedial action to defective electrical equipment must be carried out
by a qualified electrician!
Malfunction/error
Cause
Remedy
mains connected and master
loss of supply voltage
check mains fuse,
switch in pos.´ON´/
check mains cable
mains control
is not lit
F1 fuse at aux. transformer
exchange F1 fuse
defective
(T 0,5 A / 250 V)
mains control lamp
check/exchange
defective
main switch
master switch in pos.´ON´/
fan runs only in case of
see chapter 14
fan out of service
excessive current source
brief description
temperature
no function after pressing
torch key-button
check torch key-button
torch key-button (no
defective
tripping of contactor)
torch control line
check torch control line
interrupted
control board defective
check/exchange control
board
temperature fault indi-
see chapter 14
cator is lit
control elements
wire feed motor out of
control board defective
check/exchange
service
control board
wire buckling between
excessive contact
see chapter 15
wire feed rollers and
pressure of wire feed
wire feed
guide tube
rollers
distance from wire feed
check distance /
rollers to guide tube too
realign wire guide
far
tube.
Irregular wire feed
bad uncoiling of wire
check / refit wire coil
wire-holding arbor
check wire-
runs heavily
holding arbor
wrong wire feed roller
see chapter 15
wire feed
dirty / defective
see chapter 15
wire guide tube or spiral
wire feed
clogged / defective
clean / exchange
current contact tip
current contact tip
dirty/ rusty
exchange
welding wire
welding wire
wire guide tube misaligned
see chapter 15
with wire feed roller groove
wire feed
