13
Troubleshooting table
Defect
Cause
Remedy
Power supply switch (Pos. 7, Fig. A)
on with white LED indicator reporting
power supply off (Pos. 2, Fig. A)
• No power
Verify:
• correct connection of the power supply cable
• correct connection of the
power supply cable plug
• the electrical plant to which the
plasma cutter is connected
• Defective power inverter
• Replace
Yellow LED indicator for thermostatic
protection on (Pos. 4, Fig. A)
• Thermostatic protection triggered
• Wait for it to reset after a few minutes
and reduce the work cycle time
Lack of air with torch button pressed
• Defective power inverter
• Replace
• Compressor breakdown or fault
• Replace
Pilot arc does not go on when
torch button is pressed
• Defective power inverter (if red LED off)
• Replace
• External torch nozzle unscrewed
or incorrectly mounted
• Reassemble or tighten torch nozzle
• Worn electrode and hood on torch
• Replace
• Pilot arc resistor interrupted
• Replace
• Torch button defective
• Replace
If red plasma cutting cycle control
LED slow flashing (Pos. 3, Fig. A)
• Plant air pressure insufficient (<2.5 bar)
• Verify the air compressor fro correct function
• Clean the air compressor air filter
• Verify that the power inverter
fuse has not burnt out
• External torch nozzle unscrewed
or incorrectly mounted
• Remount or tighten the torch nozzle
• Under-voltage or over-voltage
• Power off the plant and check that the
power supply corresponds to the plaque
• Call in technical assistance
Common cutting defects
Defect
Cause
Remedy
Insufficient penetration
• Cutting speed too high
• Reduce speed
• Current too low
• Increase current
• Ground wire connected wrong
• Check ground wire connection
Main arc goes out
• Cutting speed too slow
• Increase speed
• Too much space between torch and piece
• Reduce space
• Excessive erosion of electrode
• Replace electrode
Excessive residues
• Air pressure wrong
• Regulate the air pressure reducer correctly
• Cutting speed too slow
• Increase speed
• Hood hole eroded
• Replace hood
• Spacer wrong
• Reduce spacer
Hood overheated or black
• Current too high
• Reduce current
• Space between hood and piece too small
• Increase space
• Air dirty
• Clean air filter
• Excessive erosion of electrode
• Replace electrode
Pilot arc intermittent or sparking
• Air pressure wrong
• Adjust reducer to the right pressure
• Air dirty, greasy, wet
• Clean air filter
• Pilot arc current too low
• Check the equipment pilot arc circuit
