Mitsubishi Electric PURY-P72 Service Handbook page 309

[ IX Troubleshooting ]
[THMU-A]
(6) Diode stack (P96 and P120 models)
Measure resistances between each pair of terminals on the diode stack with a tester, and use the results for troubleshoot-
ing.Refer to (5) " Intelligent power module (IPM) " for notes on measurement and tester selection.
Judgment value (reference)
+ (P)
- (N)
to (L1)
Red (-)
to (L2)
to (L3)
HWE0803A
Black ( + )
+ (P) - (N) to (L1)
- - 5 - 200
ohm
- -
5 - 200 -
ohm
5 - 200 -
ohm
5 - 200 -
ohm
- 300 -
External view
to (L2) to (L3)
5 - 200 5 - 200
ohm ohm
- -
Internal circuit diagram
- -
- -
L1 L2 L3
+
L1
L2
L3
-
GB