Elettro 455 Manuel D'instructions page 13

enter the password, turn the power source off and then on
again. To remove the password function when this is
enabled, press the knob and when appears on the
display, select . The log-in function will not appear upon
next start-up.
5. MAINTENANCE
Always cut off the power supply to the machine before any
operation, which must always be carried out by qualified
personnel.
5.1. MAINTENANCE OF POWER SOURCE
In the case of maintenance inside the machine, make sure
that the switch S8 (pict. 1) is in position "O" and that the
power cord is disconnected from the mains.
Also make sure that there is no voltage at the ends of the
IGBT group capacitors.
Even though the machine is equipped with an automatic
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 S10 (pict.1).
It is also necessary to periodically clean the interior of the
machine from the accumulated metal dust, using
compressed air.
5.2. MAINTENANCE OF TORCH (See pages 41 and 44)
Replacement of consumable parts
The parts subject to wear are electrode 23, diffuser 24 and
nozzle 25. All parts may be only replaced after loosening
nozzle holder 26. Electrode 23 should be replaced when a
1/16" (1,5 mm) deep crater is created in the middle. Nozzle
25 should be replaced when its central hole is damaged or
enlarged in comparison with the new part.
The use of a worn electrode quickly wears out the nozzle.
When the electrode is worn, the power cut of the machine is
reduced. A delayed replacement of electrode and nozzle
causes overheating of consumable parts and reduces the
life of diffuser 24. Make sure that after replacing it, nozzle
holder 26 is tight enough.
ATTENTION! Nozzle holder 26 should be screwed on
head only when electrode 23, diffuser 24 and nozzle 25
are assembled.
5.3. 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.
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