Troubleshooting preparation, Test equipment, Troubleshooting procedures and sequence – Hypertherm Powermax105 Service Manual User Manual
Page 145: Troubleshooting preparation -7, Powermax
TroubleshooTing and sysTem TesTs
powermax
105 Service Manual
8-7
troubleshooting preparation
The complexity of the circuits requires that service technicians have a working knowledge of inverter power supply
theory. In addition to being technically qualified, technicians must perform all testing with safety in mind.
If questions or problems arise during servicing, call the Hypertherm Technical Services team listed in the front of this
manual.
test equipment
• Multimeter
• IGBT (insulated gate bipolar transistor) tester (part number 128883)
troubleshooting procedures and sequence
When performing the troubleshooting procedures:
• Read the Safety and Compliance Manual (80669C) for detailed safety information.
• Refer to the Power Supply Component Replacement section.
• Refer to the Parts section.
• Refer to the Wiring Diagrams section.
After the problem has been located and repaired, refer to the “Sequence of operation” flow diagram in this section to
test the power supply for proper operation.
Power OFF and disconnected
External inspection
Power ON
Internal inspection
Resistance checks
Troubleshooting guide and Fault
codes sections
Troubleshooting tests