Hypertherm Powermax125 Service Manua - Manual (Page 118)

118 Powermax125 Service Manual 808070
8 – Troubleshooting and System Tests
Hypertherm IGBT tester
Use the Hypertherm IGBT tester (128883) as described in the following sections, or assemble your own IGBT tester
from the schematic diagram shown in
Figure 10 on page 123 and use it to test the IGBTs.
Figure 7
128884
1
2
3
4
5
6
7 8
9
10
1 Test for shorted IGBT
2 Fail LED (red)
3 Pass LED (green)
4 Circuit diagram
5 Low battery LED (red)
6 Test for open IGBT
7 Rocker switch
8 Collector (red)
9 Gate (yellow)
10 Emitter (black)