
Troubleshooting Guide
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Only for training and service purposes
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Check the IPM (Measuring after Comp connector disconnect)
1) Test mode set diode mode( )
RD(+)
RD(+)
BK(-)
BK(-)
P
NW
VU
P
NW
VU
Measuring method
AB
Terminal
P
N
WVU
U
V
W
0.4~0.6V
0.4~0.6V
0.4~0.6V
0.4~0.6V
0.4~0.6V
0.4~0.6V
Measuring method A Measuring method B
Troubleshooting CH21
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