LSIS H100 - Page 42

3. Maintenance
41
Checking IGBT Tr6
1) Measure the resistance of Tr6 by placing the red lead (positive terminal of DMM) on N and the
black lead (negative terminal of DMM) on V phase.
 If the resistance indicated on DMM is several hundred kΩ or less, it is acceptable.
2) Measure the resistance of Tr6 by placing the read lead (positive terminal of DMM) on V phase
and the black lead (negative terminal of DMM) on N.
 If the DMM indicates several MΩ, it is acceptable.
3) Measure the resistance of other Tr in the same way.
Caution
Before testing, check the discharge of electrolytic capacitor (DCP-DCN).