Kemppi KEMPACT 181A, Service Manual, Page: 33 / 40

SERVICE MANUAL
KEMPACT RA_V_1.2 32 (40)
Kemppi Oy
8.2.2. IGBT module, V2
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IGBT module can be tested by multimeter if using the diode tester function. Module holds four diodes and in many
cases they may be defective if IGBT is damaged
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When measuring IGBT unit diodes you must disconnect other end of main transformer (X7)
o
After measuring connect other end (X7) back
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