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Troubleshooting table
It is normally possible to find the cause of a breakdown through the warning LEDS located on the right hand side of the front of
the system. The first thing to do, therefore, is to check which leds are on. Here below we are listing some of the possible break-
downs that may occur on the system.
Defect Cause Remedy
Green power supply on LED
switched off (Pos. 11, Fig. B)
• Cutting machine power supply
cable not connected to the
mains power supply
• Connect the cutting machine
power supply cable to the
mains power supply
• Power supply switch off (Pos. 5, Fig. A) • Switch on the machine by
turning the power supply switch
to position 1 (Pos. 5, Fig. A)
• Mains voltage incorrect • Check that the voltage for the
power supply to the cutting
machine corresponds to that for
the actual mains power supply
• Some components in the
cutting machine are defective
or malfunctioning
• Call in technical assistance
• No power supply to the machine
due to the action of fuses or trip
switches for the power supply
socket upstream of the machine
• Replace blown fuses or reset the
trip switches that have tripped
Yellow thermostatic protection
LED on (Pos. 3, Fig. B)
• When this LED switches on it
indicates that the trip switch
has tripped because you are
working beyond the work cycle
• After several minutes the overheat
cut-off rearms automatically (and
the yellow LED turns itself off) and
the welder is ready for use again
Yellow indication LED for no compressed
air, switched on (Pos. 2, Fig. B)
• No compressed air or
insufficient pressure
• Check and replace the pressure
switch if necessary.
• Check the feed circuit for
the compressed air
• Fault in the pneumatic circuit • Check and replace the
solenoid valve if necessary
Red torch button activation LED
switched off (Pos. 10, Fig. B)
• Torch button circuit defective • Replace the torch button
• Outside nozzle holder on
the torch not tight.
• Tighten the outside nozzle
holder on the torch
No air when the torch button is pushed
• Red torch button activation LED
switched on (Pos. 10, Fig. B)
• Red inverter activation LED
switched off (Pos. 9, Fig. B)
• Control board defective • Replace
• Solenoid valve defective • Replace
• Compressed air supply
circuit upstream of the
machine, closed or faulty
• Open or repair the compressed air
supply circuit for the machine.
Pilot arc does not go on when
torch button is pressed
• Red torch button activation LED
switched on (Pos. 10, Fig. B)
• Red inverter activation LED
switched off (Pos. 9, Fig. B)
• Defective control board • Replace
• Worn electrode and hood on torch • Replace
• Torch button defective • Replace
• Plasma torch connected
incorrectly or defectively.
• Check the plasma torch’s connection
and replace it if necessary.
• Undervoltage or overvoltage
protection activated
• Check that the power supply voltage
is between 300 V and 480 V.
Arc goes out on contact
with piece to be cut
• Lack of connection of ground wire • Connect the earth cable or check
the machine’s earth circuit.
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