See figure f.4, Troubleshooting & repair – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual
Page 86
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F-26
F-26
CAPACITOR DISCHARGE PROCEDURE
(continued)
FIGURE F.4 - RESISTOR WITH LEADS CONNECTED.
TROUBLESHOOTING & REPAIR
11. Check the voltage across terminals #9 and
#12 with the DC voltmeter. Terminal #9
has positive polarity and terminal #12 has
negative polarity. Voltage should be zero.
If any voltage remains, repeat this capaci-
tor discharge procedure.
12. Repeat discharge procedure steps 9, 10,
and 11 for each of the other three switch
boards of the FET or IGBT switch board
assembly.
POWER WAVE 450
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