April 17, 20215 yr Hi, Thank you for welcoming me into your group. My name is Gianni and I am writing to you from Sardinia (Italy) sorry for my English but I am forced to use Google translator. I have been an installer of photovoltaic systems since 2007, and I have more than 500 PV systems installed connected to the electricity grid.For about 3 years I have also dedicated myself to stand-alone systems, the inverters I am installing carry the Advance, Genius brand, etc. but they all seem to be produced by the same company and seeing your (much used) Axpert Charger I believe they are the same product . I am attaching some photos for your confirmation, thank you in advance, then I will explain what the technical problems are, Ciao
April 17, 20215 yr 4 hours ago, GianniMeloni said: they all seem to be produced by the same company and seeing your (much used) Axpert Charger I believe they are the same product . The first photo (the Advance) looks like it might be a clone of an old Axpert KS PF0.8. Does it have a manufacturing date on it? The green one looks genuine, except I don't see a small date code sticker. The rest look genuine enough, but the devil is in the detail.
April 17, 20215 yr Author Si son tutti prodotti nel 2018, il problema più comune riscontrato tra questi sono errore 09 e errore 51 - invece con il Advance mppt nessun errore ma nel display non appare più Il PV
April 17, 20215 yr Author Questo è il componente bruciato nella scheda del regolatore di carica Advance 5KVA MPPT MKS5000, sapete quale può essere la causa del danno? Da tener presente che l'impianto ha lavorato per quasi 2 anni senza problemi
April 18, 20215 yr Quote This is the burnt component in Advance 5KVA MPPT MKS5000 charge controller board, do you know what can be the cause of the damage? Keep in mind that the plant has worked for almost 2 years without problems. This is the one that I suspect is a clone. My guess is that this is the power supply PWM chip, a UC3842 (from memory, it might be another member of that family). Can you read the part number or marking code, either on that one or on an equivalent good one? [ Edit: my guess was wrong. ] Is there a transformer nearby, probably with a MOSFET also nearby? I don't think it would be one of the 6 or so grouped MOSFETs, but it could be. In earlier photos, the heatsinks seemed very skimpy. Was a larger heatsink removed for the photo, or is that how they are? Edited April 18, 20215 yr by Coulomb
April 18, 20215 yr Author 2 hours ago, Coulomb said: Questo è quello che sospetto sia un clone. La mia ipotesi è che questo sia il chip PWM dell'alimentatore, un UC3842 (dalla memoria, potrebbe essere un altro membro di quella famiglia). Riesci a leggere il numero di parte o il codice di marcatura, su quello o su uno equivalente buono? Ciao, l'integrato bruciato è questo nella foto, l'ho già montato ma il regolatore continua a non riconoscere l'ingresso del PV
April 18, 20215 yr Author Transistor PNP MMBT2907A SMMBT2907A SOT-23 SMD CODE 2F - Domani mi arrivano anche questi transistor e sostituirò anche questi, Che dici?
April 18, 20215 yr 2 hours ago, GianniMeloni said: the integrated burnt is this in the photo... Ah, a gate driver. I guessed poorly. I have no idea why it failed. The solar charge controllers in genuine Voltronic manufactured units seem to be pretty robust.
April 23, 20215 yr Author Buongiorno a tutti, ho sostituito i componenti bruciati... ma niente, il regolatore di carica non và!! 😔 mi sapete indicare quali step devo seguire per fare check preciso? posso trovare i valori da qualche parte?
April 23, 20215 yr Author Questo è quello che sospetto sia un clone. La mia ipotesi è che questo sia il chip PWM dell'alimentatore, un UC3842 (dalla memoria, potrebbe essere un altro membro di quella famiglia). Riesci a leggere il numero di parte o il codice di marcatura, su quello o su uno equivalente buono? [Modifica: la mia ipotesi era sbagliata. ] C'è un trasformatore nelle vicinanze, probabilmente anche con un MOSFET nelle vicinanze? Non penso che sarebbe uno dei 6 MOSFET raggruppati, ma potrebbe esserlo. Nelle foto precedenti, i dissipatori di calore sembravano molto succinti. È stato rimosso un dissipatore di calore più grande per la foto o è così che sono?
April 23, 20215 yr On 4/18/2021 at 12:27 AM, GianniMeloni said: This is the burnt component in the Advance 5KVA MPPT MKS5000 charge controller board... I just noticed that Q35 appears to be blown. R157 and R154 look a bit suspect; it could just be coating, or the photo. I'm not aware of any schematic traces for the SCC boards, so you'll have to trace your own, or just test parts individually. Sometimes you have to desolder them from the board to avoid other parts confusing the tests. I see a lot of 10R0 (10.0 Ω) resistors there, that's a value that tends to blow when other parts are damaged. If you do trace part of the circuit, please post here for others to benefit from. Your last photo is definitely an MPPT circuit, with the two large inductors, not a PWM one.
April 30, 20215 yr Author Salve, sto ancora lottando con la riparazione della scheda MPPT, la maggior parte dei componenti è già stata sostituita, non riesco a trovare il diodo Schottky BX320 in breve tempo, potete consigliarmi un componente equivalente? grazie mille !
May 2, 20215 yr On 2021/04/30 at 5:58 PM, GianniMeloni said: Salve, sto ancora lottando con la riparazione della scheda MPPT, la maggior parte dei componenti è già stata sostituita, non riesco a trovare il diodo Schottky BX320 in breve tempo, potete consigliarmi un componente equivalente? grazie mille ! = Hi, I'm still struggling with the MPPT board repair, most of the components have already been replaced, I can't find the BX320 Schottky diode in a short time, can you recommend an equivalent component to me? thank you very much ! You need to translate your questions to English on an English speaking forum like this. A quick Google search resulted in this: https://au.mouser.com/ProductDetail/Panjit/BX320_R1_00001/?qs=sPbYRqrBIVn9GaU08Pa%2BIA%3D%3D That's the Australian presence of Mouser, since that's where I'm located. Any Schottky diode rated at 3 A and 200 V and in a suitable package should work.
May 17, 20215 yr Author Good evening Coulomb, by now I have checked all the components but the PV symbol still does not appear! What do I throw it all away?
May 19, 20215 yr On 2021/05/18 at 1:32 AM, GianniMeloni said: What do I [ do now? ] throw it all away? Perhaps just try to buy a replacement board. From whoever sold you the inverter would be best; Ebay or similar is a risky possibility.
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