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maxo

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  1. Hi Christo Good to hear that you were able to put it back in operation. So, you have changed just the ELCO's on power supply lines +12V, +5 V and -12V DC and negative voltage regulator LM7912, (I assume you have the same part designation on your board, like are on mine mainboard). Check if you have stable voltage on this outputs, possibly yes, check also C117 in front of LM7912. For voltage fluctuations described in case when battery voltage is under 51,5V could be several reasons (output power level fluctuation or some bad part on other supply lines). Advice: Check also all othe
  2. Hi Bernardf Just quick estimation and info: My brother in law has PV set with 25 kWp on roof with 38 degrees inclination. It can not be clean manully at all (it is to big) and at the same time you need some direct ortogonall pressure power and enough water to efficciently clean up all the dirty from PV surface. He ussually order cleaning to proffesionals annually or latest every second year, professionals has appropriate equipment (lifting unit, saddles, water pressure pump etc). The difference in PV power before and after cleaning is approx 5% to 7%, all depend what is the dirt
  3. Hi Coulomb All measured in- circuit first (must have some skill to know where the parts are in parallel connection, especially in case of diodes and small value resitors; or in case of BJT and resistors or chokes), but it could be done with no problems. Resistors check was done by precise multimeter with automatic range in Ohms/kOhms/MOhms range; btw diodes, zener diode, BJT, mosfets and IGBT was checked in diodes range. For ELCO's check I'm using analog (home made) ESR meter (Homo Ludens circuit), used already for a long time and have skill to work with it. I was built it with two me
  4. High again just for case- photo of fault parts, mybe zener diode is not there. Maxo
  5. Hi again This time, some more about my findings around the Error 08, Error 51 and Error 09. Meanwhile, since my last post back from June 17 2020, I have occasionally Erorr 08, or sometimes error 51 and finally error 09 on my Axpert 5kVA (main board produced in 2017 with SN. 16-500449-00G). I have decided to describe in details about the findings and repair after the Error 09, it could help to somebody here with the same or similar problems. It happened aprox. 6 days ago, and there after error 09, only the battery charger still works OK (MPPT chrager with PV suppl), all the res
  6. Hi again This time, some more about my findings around the Error 08, Error 51 and Error 09. Meanwhile, since my last post back from June 17 2020, I have occasionally Erorr 08, or sometimes error 51 and finally error 09 on my Axpert 5kVA (main board produced in 2017 with SN. 16-500449-00G). I have decided to describe in details about the findings and repair after the Error 09, it could help to somebody here with the same or similar problems. It happened aprox. 6 days ago, and there after error 09, only the battery charger still works OK (MPPT chrager with PV suppl), all the res
  7. Hi Coulomb Just info (Elisol does not react to your last post), where he is written: "in solve to this problem for 5K MKS, change the C74 + D 26", just be good to know, what fault he had - error 51 or ?? I have checked today on my old main board: this is on back side of main board, just opposite side of MOSFET DC - SIDE Q44, Q45,Q58 and Q42 (IRFB3006G) and small TO-92 NPN and PNP transistors Q46, Q47, Q48 and Q49, look attached photo (lower left corner on photo).
  8. Hello to all included in this debate about Error 08 I'm coming back here to this forum after few years (last time back in 2017), when I have need to changed main board due to malfunction around TX6 and parts around. I have Axpert MKS 5kVA_4kW, 48V, max 145VDC from PV, 3000MPPT, produced back in year 2013 or maybe 2014. I believe software and also hardware in my case is different than in case described here for MKS II 5kW, but fault 08 means the same = bus voltage to high. I read all what is said here and also on some other related forums about fault 08 on Axpert's. My PIP ope
  9. About the Plonkster view from battery supply I agree, in all cases, when the grid is not present or even in cases when the battery is charged only from sun (type of setup work of the inverter), all internals are supplied from battery, but how long - depends only of the Ah of the battery and their quality. It could happened, if the setup for AC out from battery shut off is for instance at 46V at the evening and if charge from grid is off, you have at the next morning just 45V or even less, if during the next day is cloudy or rainy, charge of the battery from sun is null or lousy, the batt
  10. Hi Coulomb again I do not know if your assumption to flash with new software will help or not to work without TX6 and it's souroundings. My inverter works also just with battery (of coarse only for a short period when it reached setup voltage to switch power output AC only from battery- on that time my setup was to charge the batery with 2Amp from grid, because the charge from PV was not able) and works also from grid to output AC household supply, but it does not see the PV supply and not charge the battery from PV supply - that was my reason to dissasemble and open the inverter.
  11. Thank's Coulomb for details about the TX2 function, like I assume it seves with different voltages and is wounded completlly different. Go forward to find the TX6 possibly, all the rest could be done more easilly. Meanwhile: thanks for plonkster reply, UC3845 is not the problem to find and change at all, there on main board are 3 pcs UC3845, one in DIL8 and two in SMT case, function all of them is to serve 3 separate SMPS, but the output voltages of this SMPS are for sure different, also their currents. Coulumb: do you have any idea, what is the output voltage on TX6 sec
  12. Hi Coulomb Thank's for your replys and directions what to do. Let start from your first post answer, the circuit diagram in your post No. 65232 is correct and agree's with mine backengineering. For your info, gate resitor in your schematic marked with question is R233 = 22 OHM . Another infos about TX6: - winding AC_PS_OUT is done by two parallel enameled Cu wires fi 0,25 mm in diameter each (bifilar winding) between pins 8 and 11 on TX6 transformer, winding has 62 turns - primary winding (AC through diodes D17-D21 and 33uF capacitor) is done by enamled Cu wire with diamet
  13. Hello again just another info, btw CCM board was checked also, there seems to be all OK ( checked all power mosfets, diodes, elecrolytes etc), also checked all power elements on main board, also the parts on other two SMPS on main board), so far seems all is OK. I have tried to find the reason for initial mulfunction, mybe U15 has the problem with CS input - leg 3 which should limit the current (current resistor R242 =0,6 OHM) to Q37 and avoid further burn of the transformer TX6, but it was not happened. I will change U15 for any case also, but need transformer TX6 first.
  14. Hello to Chris and others Finally find time to write about the findings (Faults) in my Axpert 5kVA: I have to dissasemled complete inverter, due on first view, there on main board I have the problem (diode D62=UF304 - it's souronding was slighntly overheated ) and also SMPS transformer TX6 is burnt (outer insulation is completelly brown). Souroundings on bottom of the PCB have also the signs of overheating. Diode D62 is short also. Due in manuals I have got from Chris (thanks to him again) just this SMPS on main board (there are another two) is not shown and desribed at all. I ha
  15. Hello Chris Thank'y in advance. on your e-mail is my e-mail adress. later on (hopefully tomorrow) about my findings, will report to forum to help another members with the similar problems. maxo
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