Troubleshooting Guide; Safety Precautions - ATD 37155 Manual De Instrucciones

6.2.1 Instructions for performing repairs
After rewinding the transformer or inductance, the weld-
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ing machine must pass the applied voltage tests as indi-
cated in table 2 of paragraph 6.1.3 of the standard EN
60974.1 (CEI 26.13). Compliance must be verified as
specified in 6.1.3.
If no rewinding has been done, a welding machine that
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has been cleaned and/or revised must pass an applied
voltage test with test voltage values equal to 50% of the
values given in table 2 of paragraph 6.1.3. Compliance
must be verified as specified in 6.1.3.
After rewinding and/or replacing parts, the no-load volt-
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age must not exceed the values given in paragraph 10.1
of EN 60974.1.
If the repairs have not been performed by the manufac-
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turer, repaired welding machines in which some compo-
nents have been replaced or altered must be marked in
such a way that the person who performed the repairs is
clearly identifiable.
After making repairs, take care to re-order the wiring so
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that there is certain insulation between the primary side
and the secondary side of the machine. Prevent the wires
from coming into contact with moving parts or parts that
heat up during operation. Replace all clamps as on the
original machine to prevent a connection from occurring
between the primary and secondary side if a conductor
accidentally breaks or disconnects.
6.3

TROUBLESHOOTING GUIDE

ROUBLE PROBABLE CAUSE
The welding machi- Line fuse blown
ne supplies limited
Burnt out diode or diodes
current
Burnt out electronic board
Loosened torch or earth
connections or any other
electrical power connec-
tions
Welding with a lot Voltage adjustment switch
of metal spatter has a loose contact
Improper adjustment of
welding parameters
Insufficient grounding
The wire jams or Contact tip with wrong dia-
entangles between meter
the drive rolls and
Misalignment of the drive
the torch infeed wire
roll groove
guide
Obstructed or clogged
liner
Drive roll with too large a
No wire feed or irre-
gular wire feed groove
Obstructed or clogged
liner
Wire holding roller not
completely tightened
Clogged contact tip
Insufficient shielding gas
Porosity in the wel- Excess oxidation of the
ding seam edges to be welded
Gas nozzle partially or
completely clogged by
spatter

7 SAFETY PRECAUTIONS

7.1 FIRE
ment is available close to welding area.
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the welding area and its surrounding (32 ft minimum).
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material, even when empty. These must be carefully
cleaned before being welded.
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putting it in contact with combustible or flammable material.
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mables.
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combustible vapours, gases, or flammable dust.
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so as to make sure that no fire has started.
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matches in your pockets.
7.2 BURNS
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tect your skin against burns caused by ultraviolet radiation
given off by the arc, and from weld metal sparks and slag.
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use in welding, hat and high safety-toe shoes. Button shirt
collar and pocket flaps, and wear cuff-less trousers to
REMEDY
avoid entry of sparks and slag.
Replace line fuse
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Replace
shields underneath, appropriate filter lenses or plates (pro-
Replace
tected by clear cover glass). This is a MUST for welding to
protect the eyes from radiant energy and flying metal.
Tighten all connections
Replace cover glass when broken, pitted, or spattered.
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Hot metal such as electrode stubs and workpieces should
Replace the switch
never be handled without gloves.
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Select the correct parame-
ters through the welding- be available for each shift unless medical facilities are
voltage switch and the
close by for immediate treatment of flash burns of the eyes
wire-speed adjustment
and skin burns.
potentiometer
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Check grounding connec-
in a confined space. A hard hat should be worn when oth-
tions
ers work overhead.
Replace
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sons intending to weld or cut.
Realign
Remove and clean
7.3 FUMES
Replace the drive roll
Remove and clean
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Tighten all the way
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Replace
for this procedure.
Increase gas delivery
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Thoroughly clean the
gen degreasers giving rise to toxic gases. Some clorine
edges with a metal brush
solvents may decompose with the radiation emitted by the
Remove and clean or
arc, and create phosgene gas.
replace being careful not
to clog the gas outlets
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Avoid causing fire because of sparks,
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slag, hot metal or pieces.
Make sure that suitable fire-fighting equip-
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Remove all flammable and combustible material from
Do not weld containers of combustible or flammable
Allow the welded material to cool down before touching it or
Do not weld parts with hollow spaces, containing flam-
Do not work under conditions with high concentrations of
Always check the work area half an hour after welding
Do not keep any combustible material such as lighters or
Wear fire-proof clothing all over your body in order to pro-
Wear protective clothing-gauntlet gloves designed for
Wear helmet with safety goggles and glasses with side
Avoid oil or greasy clothing. A spark may ignite them.
First-aid facilities and a qualified first-aid person should
Ear plugs should be worn when working on overhead or
Flammable hair preparations should not be used by per-
Welding operations give off harmful fumes and
metal dusts which may be hazardous to your
health, therefore:
Work in a well-ventilated area.
Keep your head out of fumes.
In closed areas, use suitable exhaust fans.
If ventilation is not enough, use breathing sets approved
Clean the material to be welded of any solvents or halo-
Do not weld plated metals or those containing lead,
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