TroubleshooTing and sysTem TesTs
powermax
65/85
Service Manual
5-37
Problem
Meaning
Causes
Solution
Machine does not cut
well (does not appear to
be cutting at full cutting
power) and the arc does
not time out after 5
seconds.
Inadequate ground.
• Poor work lead
connection.
• Verify that the work lead is attached to
the workpiece and the workpiece is free
of rust, paint, or other coatings.
• Damaged work
lead.
• Check the resistance across the work
lead. If the resistance is greater than 3
Ω, repair or replace the work lead.
• Faulty pilot arc
IGBT.
• Turn the power OFF, remove the
consumables, and check the resistance
between the cathode and the work
piece. If the resistance is less than 5 kΩ,
check the resistance across the pilot
arc IGBT (two screws on 08). If the
resistance is less than 5 kΩ, replace the
pilot arc IGBT.
• Faulty control
board.
• Replace the control board.
Low output from the
power supply.
• Current is set too
low.
• Increase the current as needed.
Summary of Contents for Powermax 65
Page 1: ...Service Manual 807120 Revision 1 Plasma arc cutting systems ...
Page 10: ...vi powermax65 85 Service Manual ...
Page 16: ...Table of Contents xii powermax65 85 Service Manual ...
Page 32: ...Specifications 1 16 powermax65 85 Service Manual ...
Page 182: ...Troubleshooting and System Tests 5 56 powermax65 85 Service Manual ...
Page 216: ...Component Replacement 6 34 powermax65 85 Service Manual ...
Page 244: ...Wiring Diagrams 8 2 powermax65 85 Service Manual ...