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[ IX Troubleshooting ]
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HWE08040 GB
(5) Intelligent power module (P120 model)
Measure resistances between each pair of terminals on the IPM with a tester, and use the results for troubleshooting.
1) Notes on measurement
Check the polarity before measuring. (On the tester, black normally indicates plus.)
Check that the resistance is not open ( ohm) or not shorted (to 0 ohm).
The values are for reference, and the margin of errors is allowed.
The result that is more than double or half of the result that is measured at the same measurement point is not allowed.
2) Tester restriction
Use the tester whose internal electrical power source is 1.5V or greater
Use the dry-battery-powered tester.
(The accurate diode-specific resistance cannot be measured with the button-battery-powered card tester, as the applied volt-
age is low.)
Use a low-range tester if possible. A more accurate resistance can be measured.
Judgment value (reference)
Black ( + )
PNUVW
Red (-)
P - - 5 - 200 ohm 5 - 200 ohm 5 - 200 ohm
N- -
U 5 - 200 ohm - - -
V 5 - 200 ohm - - -
W 5 - 200 ohm - - -
External view Internal circuit diagram
1 4 7 10 16
W
VU
B
P
N
V
U
P
W
N
B
3
2
1
6
5
4
9
8
7
11
13
10
14
15
12
16
Drive circuit
Drive circuit
Drive circuit
Drive circuit
Drive circuit
Drive circuit
Overheating -protection
circuit
Temperature
sensor
[THMU-A]