Igbt Module V6 - Kemppi FASTMIG X 450 Service Manual

1.2 IGBT module V6

DIODE TEST:
Diodes must be measured both forward bias and reverse bias condition to make sure they are fine
•
Check the diodes using the multimeter diode function to measure their threshold voltage 0,3...0,6 V
•
When measuring IGBT unit diodes you must disconnect other end (X7) of main transformer
•
DC link (+)
DC link (-)
Measurings:
Positive test lead
X20
X7
X20
X6
X13
X16
X15
X16
Kemppi OY
X16
X20
Negative test lead
X7
X20
X6
X20
X16
X13
X16
X15
SERVICE MANUAL
FASTMIG X
Result
0,3-0,7VDC
no value
0,3-0,7VDC
no value
0,3-0,7VDC
no value
0,3-0,7VDC
no value
28 (37)