25
IT
AL
IA
NO
The most common problems you may encounter and the relative solutions are listed below:
13. TROUBLESHOOTING
РУ
СС
КИ
Й
ES
PA
ÑO
L
FR
AN
ÇA
IS
DE
UT
SC
H
EN
G
LI
SH
DEFECT
CAUSE
SOLUTION
Welder does not start.
1) Make sure that there is vol-
tage in the supply mains
1) Switch-on the supply mains
The wire does not feed when the
wire-feeder roller rotates
1) Dirt on the tip of the wire-
feeder
1) Blow with compressed air,
replace nozzle
2) Excessive spool torque.
2) Loose
3) Faulty torch.
3) Check wire-feeder liner.
Jerky or intermittent wire-feed.
1) Faulty gas nozzle.
2) Replace
2) Scorched gas nozzle.
2) Replace
3) Dirt in wire-feeder roller
groove.
3) Clean
4) Worn wire-feeder roller groove
2) Replace
Arc cut-out
1) Loose earth clamp grip.
1) Tighten clamp grip
2) Short circuit between contact
nozzle and gas hose.
2) Clean or replace contact
nozzle and wire-feed nozzle
Welder cuts out after prolonged
use
1) Unit overheated and thermal
protection device has set in
1) Leave the unit to cool down
for at least 1-20 minutes.
Porous welds
1) Lack of shielding gas caused
by build-up in gas nozzle
1) Clean away build-up
2) Incorrect torch angle
2) The air gap between the torch
and the workpiece must be 5-10 mm.
Ensure 60° torch angle.
3) Gas shortage
3) Increase gas flow
4) Damp workpieces
4) Dry workpieces with hot-air
gun or suchlike
5) Welding Arc too long
5) Shorten the arc
Hot cracks
1) Damp workpieces
1) Clean
2) Welding with very high heat
supply
2) Decrease the welding current
3) Impure welding wire
3) Change the welding wire
4) Base material with high con-
tent of carbon, sulphur and other
imputities
Insufficient penetration
1) current too low
1) increase the current
2) Inconstant wire feeding
2) See the above paragraph
3) Edges too apart from each
other
4) Bevel too small
Insufficient melting
1) Abrupt movements of the torch
1) Move the torch smoothly.
2) Non-optimized inductance value
2) Change the inductance value.
3) Oxidized workpieces
3) Clean
Lateral indentations
1) Excessive welding speed
1) Decrease the welding speed
Breakages
1) Unsuitable wire
1) Change the type of wire
2) Bad quality of the workpieces
Excessive splashes
1) current too high
1) Decrease the current value
2) Non-optimized inductance value
2) Increase the inductance value
3) torch too inclined
3) Straighten the torch