Preliminary Check Of The Main Inverter Board - ESAB Fabricator 181i Service Manual

6.08 Preliminary Check of the Main Inverter Board

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CAUTION
Read and follow safety information in Section 6.02 before proceeding.
3
1
2
Output Diode Testing
Left Output Diodes
Right Output Diodes
IGBT Testing
IGBT 1
IGBT 2
IGBT 3
IGBT 4
Manual 0-5449
12
9
10
18
17
4
5
6
Multimeter Lead Placement
Positive meter lead to testpoint 5
Negative meter lead to testpoint 6
Positive meter lead to testpoint 7
Negative meter lead to testpoint 8
Table 6-3 Output Diodes, Multimeter set to measure Diode Voltage
Multimeter Lead Placement
Positive meter lead to testpoint 9
Negative meter lead to testpoint 10
Positive meter lead to testpoint 11
Negative meter lead to testpoint 12
Positive meter lead to testpoint 13
Negative meter lead to testpoint 14
Positive meter lead to testpoint 15
Negative meter lead to testpoint 16
Table 6-4 IGBT's, Multimeter set to measure Diode Voltage
14
19
13
11
6-5
ESAB FABRICATOR 181i
20
16
15
22
8
7
A-09988
Diode Voltage
0.2 – 0.8 VDC
0.2 – 0.8 VDC
Diode Voltage
0.2 – 0.8 VDC
0.2 – 0.8 VDC
0.2 – 0.8 VDC
0.2 – 0.8 VDC
TROUBLESHOOTING
21