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7.0 PROBLEMS - CAUSES
7.1 Possible faults in the MMA welding
Fault
Excessive spatter
Craters
Inclusions
Insufficient penetration
Sticking
Blow-hole and porosity
Cracks
7.2 Possible faults in the TIG welding
Fault
Oxidations
Tungsten inclusions
Porosity
Hot cracks
20
Cause
1) Long arc
2) High current
1) Fast movement of the
electrode away from piece.
1) Poor cleanliness or distri-
bution of the passes
2) Defective movement of
the electrode
1) High progression speed
2) Welding current too low
3) Narrow chamfering
4) Deseaming failure on top
1) Arc too short
2) Current too low
1) Humidity in electrode
2) Long arc
1) Current too high
2) Dirty materials
3) Hydrogen in weld
(present on electrode
coating)
Cause
1) lnsufficient gas.
2) No protection on the re-
verse.
1) lncorrect electrode shar-
pening.
2) Electrode too small.
3) Operating failure (contact
of the tip with the work-
piece).
1) Dirt on the edges.
2) Dirt on the filler material.
3) High advancement speed.
4) Current intensity too low.
1) Unsuitable filler material.
2) High heat supply.
3) Dirty materials.
7.3 Possible electrical failures
Fault
Machine does not come on.
(Green led off)
Power delivery not correct.
(Green led on)
No current at output.
(Green led on)
If you have any doubts or problems, do not hesitate to con-
sult your nearest technical service centre.
8.0 NECESSARY ORDINARY MAINTENANCE
Avoid accumulation of metal dust near and on the ventilation
fins.
Disconnect the system before all operations!
Periodical checks on the power source and
WU15:
* Clean the inside using compressed air at low
pressure and soft bristle brushes.
* Check the electrical connections and all con-
nection cables.
For maintenance and use of the pressure redu-
cers, consult the specific manuals.
For maintenance and replacement of the compo-
nents of the TIG torches, electrode gun and/or
ground cables:
* Disconnect the system before all operations.
* Check the temperature of the components and ensure
that they are not overheated.
* Always use gloves in compliance with regulations.
* Use suitable spanners and tools.
NOTA: Failure to perform said maintenance will invalidate
all warranties and exempt the manufacturer from all liabi-
lity.
Cause
1) No voltage at power supply
socket.
2) Faulty power supply plug or
cable.
3) Internal fuse blown.
1) Incorrect setting of welding
parameters.
2) Mains voltage low.
3) Faulty current regulation
potentiometer.
1) Yellow led on and "10"
blinking on D1: equipment
overheated.
Wait
for
cooling with welder on.
2) "20" blinking on D1: serial
memory error (call techni-
cal support).
3) "24" blinking on D1: RC
calibration error (call tech-
nical support).
4) "25" blinking on D1: serial
memory error (call techni-
cal support).
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