Igbt Module, V2 - Kemppi Kempact 253R Service Manual

8.2.2. IGBT module, V2

IGBT module can be tested by multimeter if using the diode tester function. Module holds four diodes and in many
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cases they may be defective if IGBT is damaged
When measuring IGBT unit diodes you must disconnect other end of main transformer (X7)
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After measuring connect other end (X7) back
o
Measurings:
1) Positive test pole to connector X7 and X8 one at time, negative test pole to DC link (+)
Result: 0,3...0,6 diodes Ok
2) Positive test pole to DC-link (-), negative test pole to X7 and X8 one at time
Result: 0,3...0,6 diodes Ok
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