Hi there. New member here. I have a Kemppi Minarc Evo 150 with a small problem. I’ve seen some different problems with those but not quite like this. It does start and weld, the potentiometer for output current is showing on display and can be changed - but it only welds on full current (140a)...

To start with check the potentiometer in the evening I'll see if I have the schematic I'll send you. Waldemar Added after 11 [minutes]: .

Thanks a bunch. I think pot is fine.. I have a handheld potentiometer too and it does the same. Looks like my problem is IGBT module VS-150MT060WDF.. which can’t be bought afaik.

Kemppi Minarc Evo 150 Only Welding at Full Current Regardless of Potentiometer Setting

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#1 21693451 18 Sep 2025 11:09

ftar ftar

Level 2

Topic author

Post #1
21693451 18 Sep 2025 11:09

Hi there. New member here. I have a Kemppi Minarc Evo 150 with a small problem. I’ve seen some different problems with those but not quite like this.

It does start and weld, the potentiometer for output current is showing on display and can be changed
- but it only welds on full current (140a) no matter what I set it to. Any advice where to start looking? What is controlling current output?

Regards ftar
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#2 21693517 18 Sep 2025 12:42

waldek63 waldek63

Level 16

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Post #2
21693517 18 Sep 2025 12:42

To start with check the potentiometer in the evening I'll see if I have the schematic I'll send you. Waldemar

Added after 11 [minutes]:

.
#3 21693635 18 Sep 2025 14:44

ftar ftar

Level 2

Topic author Helpful post? (0)

Post #3
21693635 18 Sep 2025 14:44

Thanks a bunch. I think pot is fine.. I have a handheld potentiometer too and it does the same. Looks like my problem is IGBT module VS-150MT060WDF.. which can’t be bought afaik.
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