Est (g3165-1) see table f.6, Table f.6, Troubleshooting & repair – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual
Page 133
F-73
F-73
IGBT/SWITCH BOARD TEST (G3165-1)
TABLE F.6 – NOTE: This test will NOT determine if an individual IGBT device is open.
TROUBLESHOOTING & REPAIR
POWER WAVE 450
Apply
Apply
Positive
Negative
Test
Test
Probe to
Probe to
Test
Repair
Next
Terminal
Terminal
Result
Conclusion
Action
Procedure
2/4
12
Greater than OK
None
Continue
1k ohms
Less Shorted
Replace
Snubber
than 1K
Switch
Resistor
ohms
Boards
Test
9
1/3
Greater
OK
None
Continue
than 1K
ohms
Less than
Shorted
Replace
Snubber
1k ohms
Switch
Resistor
Boards
Test
2/4
9
Less
OK
None
Continue
than 100
ohms
Greater than Open
Replace
Snubber
1k ohms
Switch
Resistor
Boards
Test
9
2/4
Greater than OK
None
Continue
1k ohms
Less
Shorted
Replace Snubber
than 1K
Switch
Resistor
ohms
Boards
Test
NOTE: K ohm = ohm reading multiplied by 1000.
NOTE: Always make sure that all four Switch Boards are changed at the same time. Never
mix an old style (different part number) Switch Board with a new style (new part
number).