Operating Faults - Helvi COMBI PC 502 K Manual De Uso Y Manutención

OPERATING FAULTS

During cutting operations performance faults may arise which are not caused by plant malfunctioning
but by other operational faults such as:
√ Insuficient penetration :
√ Interruption of the cutting arc:
√ Excessive scoria settlement:
√ Tilted cutting (not perpendicular):
√ Excessive wear of nozzle and
electrodes:
MAINTENANCE
Maintenance can only be carried out on the unit if the person in charge of this operation has the necessary
technical knowledge and the correct tools. If this is not the case, contact your nearest service centre.
Never access inside the machine (panel removal) or touch the torch (disassemblage)
Any inspection performed under voltage inside the machine or inside the torch may cause
severe electric shocks caused by direct contact with parts under voltage.
UNIT
Keep the cutting or gouging area and the area around the machine clean and free of combustible
materials. No debris should be allowed to collect , this could obstruct air low to the machine.
Inspect the unit every 3-4 months (depending on how often the unit is used) and use compressed air
to remove any dust deposits.
Only use dry compressed air for cleaning. Do not point the jet of air at the electronic circuits.
Clean periodically the ilter cartridge to avoid losses of pressure.
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too high cutting speed;
torch is too tilted;
piece is too thick;
cutting current too low;
torch parts are worn out;
non-genuine Manufacturer's parts;
cutting speed too slow;
excessive distance between torch and workpiece;
AC line too low - reduce output current;
torch parts are worn out;
non-genuine Manufacturer's parts;
work cable is disconnected;
too low cutting speed (bottom dross);
too high cutting speed (top dross);
excessive distance between torch and workpiece;
cutting current too low;
torch parts are worn out;
non-genuine Manufacturer's parts;
Torch position not correct;
asymmetric wear of nozzle hole and/or wrong; assem-
blage of the torch parts;
air pressure too low;
exceeding system capability (material too thick);
contaminated air (humidity-oil);
excessive pilot arc arc ignitions in the air;
Improperly assembled torch;
torch tip contacting workpiece;
damaged or loose torch head components;
non-genuine Manufacturer's parts.
CAUTION!
without having disconnected power plug.
CAUTION!