Praxair SELECT-400, Руководство по эксплуатации

Страница: 30 / 62

TROUBLESHOOTING
The most frequent problems are given below. If the problem is different, please consult the PRAXAIR SOLDADURA S.L.
technical service. Always use original spares from the machine manufacturer, PRAXAIR SOLDADURA S.L. If different
components are used, these could damage the machine or adversely affect its performance.
FAULT LIKELY CAUSE SOLUTION
Low open circuit voltage
Ø
Blown line fuses.
Ø
Blown primary fuse
> Measure the 3 line phases
> Change fuses
The ventilator does not
work
Ø
Faulty motor
Ø
Cut or loose ventilator power cables
Ø
2 or 4 A fuses blown
> measure the voltage of the motor
cables. If it is 230 V the motor is
faulty.
> Change fuses.
Poor welding current
Ø Loss in the cables
Ø Faulty wire feed
>
Tighten connections
>
Lessen the wire feed roller pressure.
>
Clean the torch tip
>
Clean the rollers or change them if
faulty.
Gas holes in weld
Ø
Insufficient shielding gas flow
Ø
Welded part is rusty or dirty.
Ø
Moisture present in gas
>
Reduce the feed speed.
>
Increase the arc voltage.
Lack of penetration
Ø
Irregular position of torch
Ø
Very low voltage
Ø
Too large a margin
Ø
Irregular wire feed
Ø
Excessive projection
>
Increase the arc voltage
Spatter
Ø
very high voltage
Ø
dirt or spatter on tip
Ø
insufficient inductance
Ø
too much angle on torch
> Reduce the arc voltage
> Clean or change the tip
> Change the earth connection to
max. ind.