Operating Faults; Ricerca Guasti - Helvi PC75 Manuel D'instructions

During cutting operations performance faults may
arise which are not caused by plant malfunctioning
but by other operational faults such as:
• Insufficient penetration:
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;
• Interruption of the cutting arc:
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;
• Excessive scoria settlement:
too low cutting speed (bottom dross);
too high cutting speed (top dross);
excessive distance between torch and workpie-
ce;
PROBLEMA
Green Led (4) OFF, Fan not
operating. No Input Power.
Indicatore di rete ON, indicatore
giallo di sovratemperatura ON
Green Led ON, Bar Led (11)
blinks, acoustic alarm
Green Led ON, Bar Led blinks
(11).
Green Led ON, Overvoltage or
undervoltage/no phase Led ON.
Unit doesn't work.

OPERATING FAULTS

•
•

RICERCA GUASTI

POSSIBILE CAUSA
Interruttore aperto.
Open breaker.
Unit is overheated.
Air Flow obstructed.
Air not connected or pressure
under 3,5bar.
Air line blocked, torch blocked.
Air pressure too low, between
3,5 and 4,0bar or over 6,5bar.
Air line blocked, torch blocked
Wrong input voltage.
cutting current too low;
torch parts are worn out;
non-genuine Manufacturer's parts;
Tilted cutting (not perpendicular):
torch position not correct;
asymmetric wear of nozzle hole and/or
wrong; assemblage of the torch parts;
Excessive wear of nozzle and electrodes:
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.
POSSIBILE SOLUZIONE
Plug unit into 380/400V outlet.
Reset Breaker.
Make sure the unit has not been
operated beyond duty cycle limits.
Ensure at least 0.5m of free space
around the unit.
Check source for at least 4 Bar
during purge or pre-flow, adjust air
pressure to optimal 5,2 Bar.
Check that air line and torch leads
are free of twists and kinks
Check source for air pressure
between 4,0 and 6,0 Bar during
purge or pre-flow, adjust air
pressure to optimal 5,2 Bar
Check that air line and torch leads
are free of twists and kinks.
Check power supply for correct
line voltage. As soon as the
voltage falls within the parame-
ters allowed by the generator the
alarm indicator (6) is turned off
and the machine restarts normal
operation. If unit doesn't restart,
contact a Service Center.
EN-13