Elettro PLASMA 76 INVERTER Betriebsanleitung Seite 9

3 .2 THE CUTTING ARC GOES OFF
T his error may be caused by:
• worn nozzle, electrode or swirl ring
• air pressure too high
• supply voltage too low
3 .3 SLANTED CUT
If the cut appears slanted, turn the machine off and replace
the nozzle.
When the cu tting current is above 45 A, prevent the nozzle
from coming into electrical contact with the workpiece
(even through scraps of molten metal), this condition
causes rapid and at times instantaneous destruction of the
nozzle hole, leading to poor quality cutting.
3 .4 EXCESSIVE WEAR ON CONSUMABLE PARTS
T his problem may be caused by:
a) air pressure too low compar
level.
b) exc essive burns on the end of the nozzle holder.
4 HELPFUL HINTS
If the system air contains considerable amounts of
moisture and oil, it is best to use a drying filter to avoid
excessive oxidation and wear on consumer parts,
damage to the torch and a reduction in the speed and
quality of the cutting.
The impurities in the
electrode and nozzle, and may make it difficult to
strike the pilot arc. If this occurs, use fine sandpaper
to clean the end of the electrode and the interior of the
nozzle.
Make su re that the new electrode and nozzle to be
mounted are thoroughly clean and degreased.
Always use original spare parts to avoid dam
the torch.
5 MAINTENANCE
A lways cut off the power supply to the machine before any
operation, which must always be carried out by qualified
personnel.
5 .1 GENERATOR MAINTENANCE
In the case of maintenance inside the machine, make sure
that the switch O is in position "O" and that the power cord
is disconnected from the mains.
Also make sure that there is no
IGBT group capacitors.
Even though the machin
condensation drainage device that is tripped each time the
air supply is closed, it is good practice to periodically make
sure that there is no condensation accumulated in the
water trap N (pict.1).
It is also necessary to periodically clean the interior of the
machine from the accumulated
compressed air.
ed to the recommended
air encourage oxidation of the
voltage at the ends of the
e is equipped with an automatic
metal dust,
5.1.1 Troubleshooting
The LED B lights when the following conditions occur:
LED B
Steadily lit
Steadily lit
Steadily lit
Steadily lit
Steadily lit
Steadily lit
Steadily lit
Flashing lit
aging
5.2 PRECAUTIONS AFTER REPAIRS.
After making repairs, take care to organize the wiring so
that there is secure insulation between the primary and
secondary 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 original 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
original machine
using
9
CONDITION SOLUTION
Upon equipment
Wait 5 sec
start-up
Button pressed
Release the
during equipment
button
start-up
Missing safety Mount the
protection H protection
Incorrect IGBT Contact technical
drive voltage service
Reed contact
closed during Contact technical
equipment start- service
up
Supply voltage Check the supply
too low voltage
Check the power
supply line. Note:
in some
situations a
missing phase
Phase missing in does not cause
the power supply the LED B to
line light, therefore
you should
always check the
power supply line
in the case of
malfunction.
Short-circuit
between Replace the
electrode and electrode and
nozzle during gas nozzle, and
equipment start- diffuser if
up or during necessary
cutting