Hypertherm Powermax105 Service Manual - Manual (Page 139)

powermax
105 Service Manual 8-1
Section 8
tRoUblESHootINg AND SyStEM tEStS
In this section:
Controls and indicators .........................................................................................................................................................................8-3
Theory of operation .................................................................................................................................................................................8-4
General ...........................................................................................................................................................................................8-4
200-600 V CSA 3-phase power supply functional description .......................................................................................8-4
230-400 V CE, 380 V CCC/230-400 V CE 3-phase power supply functional description ....................................8-5
400 V CE, 380 V CCC 3-phase power supply functional description ...........................................................................8-5
Sequence of operation ................................................................................................................................................................8-6
Troubleshooting preparation ................................................................................................................................................................8-7
Test equipment .............................................................................................................................................................................8-7
Troubleshooting procedures and sequence ..........................................................................................................................8-7
External inspection .......................................................................................................................................................................8-9
Internal inspection ........................................................................................................................................................................8-9
Initial resistance check ...........................................................................................................................................................................8-9
Check the power switch .............................................................................................................................................................8-9
Hypertherm IGBT tester .......................................................................................................................................................... 8-12
Indicator LEDs and device tests ............................................................................................................................................ 8-12
IGBT test preparation ............................................................................................................................................................... 8-13
IGBT device test using the Hypertherm tester ................................................................................................................... 8-14
Troubleshoot the Hypertherm IGBT tester .......................................................................................................................... 8-14
Schematic for building an IGBT tester ................................................................................................................................. 8-15
IGBT device test using a non-Hypertherm tester .............................................................................................................. 8-16
200-600 V CSA power supply overview ....................................................................................................................................... 8-17
230-400 V CE, 380 V CCC/230-400 V CE power supply overview .................................................................................... 8-18
380 V CCC, 400 V CE power supply overview ........................................................................................................................... 8-19