Mitsubishi City Multi PURY-P400 - Intelligent Power Module (IPM) Troubleshooting; Diode Stack Continuity Check

–80–
The measured values for troubleshooting are shown in the table below.
Perform continuity check with a tester.. Judged as normal if the following conditions are met.
123
1
2
3
+
–
W
• External view • Internal circuit diagram
• Judged value
∞
∞∞∞
5~
200
Ω
5~
200
Ω
5~
200
Ω
∞
∞
5~
200
Ω
5~
200
Ω
5~
200
Ω
P
P
Tester
Black
Tester
Red
N
U
V
W
NVW
∞
∞∞∞
5~
200
Ω
5~
200
Ω
5~
200
Ω
∞
∞
5~
200
Ω
5~
200
Ω
5~
200
Ω
+
+
Tester
Red
Tester
Black
–
1
2
3
– 123
N
P
B
V
V
U
P
W
N
B
U
3
2
1
6
5
4
9
8
7
11
13
10
14
15
12
16
Pre-Driver
Pre-Driver
Pre-Driver
Pre-Driver
Pre-Driver
Pre-Driver
Over heating
Temperature sensor
protection circuit
16 10 7 4 1
1 Focus on whether there is a complete open (∞Ω) state or short-circuit ( ~ 0Ω).
The measured resistance value is a guideline and may deviate slightly.
Measure between several similar measurement points.
If the value does not differ by more than double or half from the other points, then judge the state as OK.
2 Restrictions to applicable tester
Use a tester with an internal power of 1.5V or more.
❇
Battery type tester
A card tester with button battery has a low applied voltage, so the resistance value of the diode characteristics
cannot be measured correctly.
Use a measurement range that measures the low resistance when possible. An accurate measurement with less
fluctuation will be possible.
Intelligent Power Module (IPM)
5)
Diode stack
6)
Measure resistance between each terminal of IPM with a tester, and use the results for troubleshooting.
U