Controls and indicators .........................................................................................................................................................................5-3

Theory of operation .................................................................................................................................................................................5-4

General ...........................................................................................................................................................................................5-4

200 - 600 V CSA 1- or 3-phase power supply functional description ..........................................................................5-4

380/400 V CE 3-phase power supply functional description ...........................................................................................5-5

Sequence of operation ................................................................................................................................................................5-6

Troubleshooting preparation ................................................................................................................................................................5-7

Test equipment .............................................................................................................................................................................5-7

Troubleshooting procedures and sequence ..........................................................................................................................5-7

External inspection .......................................................................................................................................................................5-9

Internal inspection ........................................................................................................................................................................5-9

Initial resistance check ...........................................................................................................................................................................5-9

Check the power switch .............................................................................................................................................................5-9

Hypertherm IGBT tester .......................................................................................................................................................... 5-12

Indicator LEDs and device tests ............................................................................................................................................ 5-12

IGBT test preparation ............................................................................................................................................................... 5-13

IGBT device test using the Hypertherm tester ................................................................................................................... 5-14

Troubleshoot the Hypertherm IGBT tester .......................................................................................................................... 5-14

Schematic for building an IGBT tester ................................................................................................................................. 5-15

IGBT device test using a non-Hypertherm tester .............................................................................................................. 5-16

200 - 600 V CSA power supply overview .................................................................................................................................... 5-17

380/400 V CE power supply overview .......................................................................................................................................... 5-18

200 - 600 V CSA power supply overview (power board removed) ....................................................................................... 5-19

380/400 V CE power supply overview (power board removed) .............................................................................................. 5-20

powermax

65/85 Service Manual