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    blew out a battery capacity tester. where to start?

    ahh I understand now, you were referring to the 2 other components and not the mosfet that I already removed.
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    blew out a battery capacity tester. where to start?

    thank you I am not sure I follow though. What is a tab? Is that K in your image? If so then the mosfet to be tested does not seem to have a tab ;( Also I did not find a way yet to determine which side of a component is up so that I can use the schematics from the data sheet to determine what...
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    blew out a battery capacity tester. where to start?

    never mind, it's an N channel. I recognized an image in the datasheet that I also saw in the video I mentioned
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    blew out a battery capacity tester. where to start?

    sweet, found a video on how to test a mosfet using a multimeter. thing is there is apparently a distinction between p and n channel. Does anyone know how to determine what channel type this one is? I did not see it in the manufacturer's datasheet for this component
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    blew out a battery capacity tester. where to start?

    If I come across as if I know any of those components then please allow me to confess that I just searched online and copy paste what I found ;)
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    blew out a battery capacity tester. where to start?

    hooray... sort of. I am happy that I managed to get the IRFP260 (power mosfet) removed. Worried that I am only making things worse ;( Did I wreck the board or is there still hope? Anyway the other 2 components (STPS41H100CG) are low drop power skotkky rectifiers The mosfet is what the heat...
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    blew out a battery capacity tester. where to start?

    ugg sorry guys, it turns out that only having a soldering station that I've never used before (never soldered before actually) without any de-soldering tools is not a great start ;) Please bear with me as I wait for some additional tools to arrive.
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    blew out a battery capacity tester. where to start?

    could be indeed. Anyway the day has arrived that I will setup my soldering station and give removing those components the old college try. I'll keep everyone updated of my progress. Perhaps the back side of those components, that is now hidden from view by the board, show some burnt spots
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    blew out a battery capacity tester. where to start?

    than you Alec for pitching in. in this case though it is just the way light is refracted which creates dark areas. when I hold the blades towards a light source I see nothing of note.
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    How to test if UFH controller is functioning

    update: I finally was able to get someone at technical support of the manufacturer that was willing to help and it turns out that we need 3 wires. In my humble opinion the wiring diagram is confusing to untrained eyes like mine. Anyway they did suggest a different thermostat that only requires 2...
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    blew out a battery capacity tester. where to start?

    thank you. ok so I realize now then that components can be blown without a visual indication like burn marks. good to know. I will try getting them loose with my soldering station. Let's assume I am able to. How do I test them?
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    blew out a battery capacity tester. where to start?

    I am very new to electronics so please forgive me if I use incorrect terminology. I really want to learn though. I accidentally dialed one of the knobs too far and drew too much current while running a capacity test on a Lifepo4 prismatic 48V nominal battery bank that was fully charged at 58V...
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    reversed variac

    I kindly ask you to elaborate as I am not sure what you mean.
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    reversed variac

    thanks, i'll look into it
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    reversed variac

    ?? what gave you that idea? I am building a 3 phase alternator/generator that hopefully can output 400V or more while spinning at 60 rpm. My battery bank however is 48V. So when the voltage from the alternator is lower than 48V the unit I am asking about should step up convert it to 48V but...
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    reversed variac

    hahah that would be stating the obvious ;) anyway let me put it like this then. from 10 to 400V input. output is always 48V. I just realized btw I could also place a full bridge rectifier between the generator and some kind of DC to DC converter. then the DC voltage input will be variable but...
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    reversed variac

    I am hoping something like a reversed variac exists. In where there is a variable 3 phase input (high voltage wind turbine 3 phase generator varying from 0 to +400 volts) and the output is always 48 volts. only the amperage output varies depending on the voltage input. Does anyone know of...
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    How to test if UFH controller is functioning

    this thread is not abandoned. I will get back to it soon.
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    How to test if UFH controller is functioning

    here, please take a look at the wireing schema. I can't make heads or tails from it ;(
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    How to test if UFH controller is functioning

    So all in all it looks like the controller board is still functional in terms of power to the thermostat and pump. Only the power to the valve is yet to be determined but that depends on getting the thermostat correctly wired before I can test that I guess
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