How To Check Power Module; Checking Power Module Using Tester - Hitachi RAS-25CNH1 Service Manual

How to check Power module

Checking power module using tester

Set tester to resistance range(x100).
If indicator does not swing in the following conductivity check, the power module is normal.
_
(In case of digital tester, since built-in battery is set in reverse direction, + and terminals are reversed.)
CAUTION
!
If inner circuit of power module is disconnected (open), the indicator of tester will not swing and this may assumed as
and _
normal. In this case, if indicator swings when + terminals are connected in reverse of diagram below, it is
normal. Furthermore, compare how indicator swings at U, V and W phases. If indicator swings the same way at each
point, it is normal.
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