Hitachi RAS-5.0HNBRKQ1 - Page 119

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IPM Circuit of Driver Board (In case of using Digital Tester)
Test Point Analog Tester Result Digital Tester Result
(+)DCL2, (-)R More than 100k Ohm Over Load (OL)
(-)DCL2, (+)R More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)R More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)R More than 1k Ohm 0.5V or smaller
(+)DCL2, (-)S More than 100k Ohm Over Load (OL)
(-)DCL2, (+)S More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)S More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)S More than 1k Ohm 0.5V or smaller
(+)DCL2, (-)T More than 100k Ohm Over Load (OL)
(-)DCL2, (+)T More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)T More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)T More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)U0 More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)U0 More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)U0 More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)U0 More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)V0 More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)V0 More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)V0 More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)V0 More than 1k Ohm 0.5V or smaller
(+)CN28(P), (-)W0 More than 100k Ohm Over Load (OL)
(-)CN28(P), (+)W0 More than 1k Ohm 0.5V or smaller
(-)CN28(N), (+)W0 More than 100k Ohm Over Load (OL)
(+)CN28(N), (-)W0 More than 1k Ohm 0.5V or smaller
Notes:
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The positive side (+) of tester: Red; The negative side (-) of tester: Black.
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Pre-charge circuit of the Inverter PCBA
If the positive side (+) of tester is connected to DCL1, and the negative side (-) of tester is connected to CN28(P)
1) If the resistance is about 1k Ohm, it is OK. 2) If the resistance is about 0 Ohm or innity, it is damaged.
TROUBLESHOOTING