ANOMALIA
The wel-
ding
machine
supplies
limited cur-
rent
Welding
with a lot
of metal
spatter
The wire
jams or
entangles
between
the drive
rolls and
the torch
infeed wire
guide
No wire
feed or
irregular
wire feed
Porosity in
the wel-
ding seam
PROBABILE CAUSA
Line fuse blown
Burnt out diode or diodes
Burnt out electronic board
Loosened torch or earth con-
nections or any other electrical
power connections
Voltage adjustment switch has a
loose contact
Improper adjustment of welding
parameters
Insufficient grounding
Contact tip with wrong diameter
Misalignment of the drive roll
groove
Obstructed or clogged liner
Drive roll with too large a groove
Obstructed or clogged liner
Wire holding roller not comple-
tely tightened
Clogged contact tip
Insufficient shielding gas
Excess oxidation of the edges
to be welded
Gas nozzle partially or comple-
tely clogged by spatter
RIMEDIO
Replace line fuse
Replace
Replace
Tighten all connections
Replace the switch
Select the correct parame- ters
through the welding-voltage
switch and the wire-speed
adjustment poten-tiometer
Check grounding connections
Replace
Realign
Remove and clean
Replace the drive roll
Remove and clean
Tighten all the way
Replace
Increase gas delivery
Thoroughly clean the edges
with a metal brush
Remove and clean or replace
being careful not to clog the gas
outlets
replace.
• Strictly avoid striking the torch or allowing it to suffer
violent impact.
7.2 MAINTENANCE
Any maintenance operation must be carried out by qua-
lified personnel in compliance with standard CEI 26-29
(IEC 60974-4).
7.2.1 GENERATOR MAINTENANCE
In the case of maintenance inside the machine, make
sure that the switch
A
is in position "O"
and that the
power cord is disconnected from the mains.
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using com-
pressed air.
7.2.2 PRECAUTIONS AFTER REPAIRS.
After making repairs, take care to organize the wiring so that
there is secure insulation between the primary and secon-
dary sides of the machine. Do not allow the wires to come
into contact with moving parts or those that heat up during
operation. Reassemble all clamps as they were on the origi-
nal machine, to prevent a connection from occurring
between the primary and secondary circuits should a wire
accidentally break or be disconnected.
Also mount the screws with geared washers as on the ori-
ginal machine.
original machine to prevent a connection from occurring
between the primary and secondary side if a conductor
accidentally breaks or disconnects.
7.3 TROUBLESHOOTING GUIDE
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