Troubleshooting Table; Common Cutting Defects - PLASMATECH SHARK 25 Manual De Instrucciones

Troubleshooting table

Defect
Power supply switch (Pos. 7, Fig. A)
on with white LED indicator reporting
power supply off (Pos. 2, Fig. A)
Yellow LED indicator for thermostatic
protection on (Pos. 4, Fig. A)
Lack of air with torch button pressed
Pilot arc does not go on when
torch button is pressed
If red plasma cutting cycle control
LED slow flashing (Pos. 3, Fig. A)

Common cutting defects

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