Hypertherm Powermax45 Service Manual - Manual (Page 81)

TroubleshooTing and sysTem TesTs
powermax
45 Service Manual 5-5
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 with a variety of jumper leads, including E-Z Hooks
®
.
Troubleshooting procedures and sequence
When performing the troubleshooting procedures,
• Read the Safety and Compliance Manual for detailed safety information;
• Refer to the Wiring Diagrams section for the system’s electrical schematic;
• Refer to the Component Replacement section for part replacement procedures;
• Refer to the Parts section to locate power supply components and torch components.
After the problem has been located and repaired, refer to the Sequence of operation flow diagram on page 5-4 to test
the power supply for proper operation.
External inspection
Power ON
Internal inspection
Resistance checks
Troubleshooting guide
Troubleshooting tests
Power OFF and disconnected