Power-One solar Inverter driving me NUTS!!!
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Re: Power-One solar Inverter driving me NUTS!!!
I have this happened to in the past working on a board that several relays had bad pin connections and it was a multi layer board the top layer was not getting any solder on the top layer but only the bottom layer because the trace in between was not there anymore and it drove me nuts to figure out why this board was not working properly
I would highly recommend removing all the relays and very closely look at solder traces between the top layer and the bottom layer and see if it looks like there should be one or not
I not suggesting that are but some time when the bottom traces are gone and there is a top trace the solder does not travel to the top trust me I have happened to me several times in the past
Also I need to mention that the burnouts were always on the high voltage contact sides of the relays. There are two pairs of relays. I will call them the top pair and bottom pair depending on how are looking at the board. On each pair, only one relay is getting the 12v to turn on. I tested this by connecting some jumper leads to the coil side of the relays and extending the wire outside of the board for testing. However this is likely normal because a GFI error dissconnects the grid side of the inverter.Last edited by mitsu2k; 11-19-2023, 05:35 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
OK I just want to be thorough and follow your suggestions so I have removed the relays, unfortunately I did a little bit more damage in the process but that’s OK. Anyhow, the photos are attached.
I did check for continuity between all top holes and bottom holes after removing the relays and had continuity through on all 16 holes.Last edited by mitsu2k; 11-19-2023, 10:16 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
Oh boy, there is a lot of black PCP that would needed to be cut out, filled etc. it’s all exposed too ready to hold moisture… with a lot of DC power going through it, not good. I also seen a few little via’s that look a little sad.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
Something else I noticed: while the instructions tell us to look at the DC side, it looks like all that GFI jazz is done on the AC side? Look at the AC output and follow it straight up. It goes to the CT transformer and the little relay that has something to do with it? Then this goes to these burnt relays. Maybe we are looked at it wrong, since the fault was supposed to be at the DC side. What if some protection device weither shorted or opened on the AC side to Earth ground? Is that maybe why you don’t get any error codes on the display, because we aren’t looking in the right spot?
At the AC output side there is a blue cap and some round cylindrical protection device, for shitts and giggles check those.
After all, if that is the case, the GFI can’t say there is something wrong on the DC because there is no fault there, yet the GFI wouldn’t work either making the light come on, because it lost connection to earth ground somewhere else.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
Something else I noticed: while the instructions tell us to look at the DC side, it looks like all that GFI jazz is done on the AC side? Look at the AC output and follow it straight up. It goes to the CT transformer and the little relay that has something to do with it? Then this goes to these burnt relays. Maybe we are looked at it wrong, since the fault was supposed to be at the DC side. What if some protection device weither shorted or opened on the AC side to Earth ground? Is that maybe why you don't get any error codes on the display, because we aren't looking in the right spot?
At the AC output side there is a blue cap and some round cylindrical protection device, for shitts and giggles check those.
After all, if that is the case, the GFI can't say there is something wrong on the DC because there is no fault there, yet the GFI wouldn't work either making the light come on, because it lost connection to earth ground somewhere else.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
By the way, I did replace the CT device. Expensive little sucker. Over $30 on AliExpressLast edited by mitsu2k; 11-20-2023, 01:37 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
I was previously told it should test open. See thread below.
https://www.badcaps.net/forum/showthread.php?t=124790
It may be that some voltage has to go through it but I fear blowing it if I test wrong.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
It is denoted with a “V” like the other 4 bulb looking things so I assume it is a gas discharge. If it were a fuse, I would think it would be denoted with a “F“Last edited by mitsu2k; 11-20-2023, 03:03 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
I think I found something. This dialed circled is testing open in both directions. The remaining are testing fine. Now the question is how to identify it.
This would also make sense in that maybe there isn't a real ground fault but the detection circuit is wacky. I've included a better picture of the markings.Last edited by mitsu2k; 11-20-2023, 03:33 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
I think I found something. This dialed circled is testing open in both directions. The remaining are testing fine. Now the question is how to identify it.
This would also make sense in that maybe there isn’t a real ground fault but the detection circuit is wacky. I’ve included a better picture of the markings.
try cleaning it off with 99% IPA so we can read it better. looks like a diode?Comment
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Re: Power-One solar Inverter driving me NUTS!!!
closest i can find are zener . BZT52C22 . but testing open suggests tvs . never seen diodes fail open . suppose it could happen thoughLast edited by petehall347; 11-20-2023, 04:01 PM.Comment
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Re: Power-One solar Inverter driving me NUTS!!!
Last edited by mitsu2k; 11-20-2023, 04:20 PM.Comment
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