HOW TO CHECK POWER MODULE
Checking power module using tester
Set tester to resistance range (
×
100)
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.)
If inner circuit of power module is disconnected (open), the indicator of tester will not swing and this may
assumed as normal. In this case, if indicator swings when + and - terminals are connected in reverse of
diagram below, it is normal. Furthemore, compare how indicator swings at U, V and W phases. If indicator
swings the same way at each point, it is normal.
CAUTION
!
15
P1
L2 L1
WV
P2 UN1 P1
L2 L1
WV
P2 UN1
15
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