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Minarc Evo 150 Powers On, Green Light, 0 Amps Display, 2.2V Output

Wlders 2709 2
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  • #1 18840418
    Wlders
    Level 1  
    So I have a Minarc Evo 150, which shorted when welding. Now it turns on, green light is lit and I have no errors, but a display shows 0 amps, and I can't adjust amps with potentiometer. On the output I have 2.2V. I have attached manual here, and using this I've checked input rectifier and PFC circuit, IGBT module and secondary diodes, all are okay. I've checked the potentiometer and it's working properly. Any ideas what to check after this?
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  • #2 18852153
    smd
    Welding machines specialist
    If there is 380-390V on the capacitors, you can remove the IGBT module and check it with a tester. If it is out of order, then a basket welder ;) because it cannot be bought (unless 50 pcs in the USA). If it's ok, check if there are any waveforms on the gates, if you don't have to replace the drivers. If there are no waveforms, unfortunately I wish you good luck digging the entire welding machine and finding the fault.
  • #3 19669676
    mnenadovic_ca
    Level 1  
    Good day to all, I hope I can find some help here before I dig into my Kemppi evo 150.
    The machine turns on all the lights are working but the amp are stuck on 12 amps and will not change.
    I opened the machine to check visually if there is any damage and I only found that the solder doesn't look good on tp1, can that cause the amp potentiometer not to work?
    Will doing a recalibration help at all?
    Any suggestions are welcome and please talk to me like I'm 5 years old 😁 because I'm not that good in electronics.
    Thank you all Minarc Evo 150 Powers On, Green Light, 0 Amps Display, 2.2V Output
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