5 hours ago, Coulomb said:

That part costs under R10:

https://www.mouser.co.za/ProductDetail/Vishay-Semiconductors/RS1J-E3-5AT?qs=lBalI7KQBwqGckUc1sVLow==

It will of course cost a lot more for shipping. And of course, it may not be the only part that failed.

It's just a high speed 1 A silicon diode. Rated at 600 V, but it only need to be about 50 V. You might be able to buy one at a local electronics store (I have no idea where you'd go in South Africa). Even if it's a through-hole part, you could probably make one fit to see if that fixes the problem (if you or a friend is handy with electronics).

Excellent, thanks for all your information, this is the first that I will try!

My concern with that is not just replacing the diode, which is easy, but why it blew in the first place. Diodes don't usually break like that unless their maximum current was exceeded by a LOT (if you only exceed it by a bit, the diode just gets too hot and, if it gets hot enough, may even desolder itself from the PCB) or their max. reverse voltage was exceeded by a fair amount. So I would guess that something else broke first and the blown diode is just a symptom. My guess would be that something else blew short circuit and the diode had to carry the short circuit current, which caused it to blow as well.

8 hours ago, Stanley said:

My concern with that is not just replacing the diode, which is easy, but why it blew in the first place. Diodes don't usually break like that unless their maximum current was exceeded by a LOT

Indeed. A sadly common problem with the comms boards is that the small transformer (technically a multi-winding inductor) overheats and there are shorted turns. Those transformers are one of the very few components that you can't order from an electronic component supplier; they are all custom wound. Check for discolouration of the transformer (the thing with yellow tape on it).

I've heard of people obtaining replacement communications boards from Ebay or the like. Fortunately, the comms boards haven't changed in function all that much, so one from a slightly different model should be fine (as long as it has the right connectors).

Hello,

I had a bad experience with my "easun 3kva mppt ... " wich seems to be the same hardware as axpert VM II series. After a rain with lot of lightnings my inverter went off with warning "20" ont its display. The error isn't in the manual.

It does not start anymore, but I searched for problems and found 2 faulty boards.

1. the communication board ( D2 burned ) PN:16-500900-00G

2. the CNTL Board PN:16-501053-00G

Please let me know if anyone could help me buy this boards ( especially the CNTL Board ) because I can't use the inverter anymore.

I am from Romania but I am willing to pay for shipping without problem.

Thanks a lot for your future support.

On 2020/10/09 at 4:34 PM, Coulomb said:

Indeed. A sadly common problem with the comms boards is that the small transformer (technically a multi-winding inductor) overheats and there are shorted turns. Those transformers are one of the very few components that you can't order from an electronic component supplier; they are all custom wound. Check for discolouration of the transformer (the thing with yellow tape on it).

I've heard of people obtaining replacement communications boards from Ebay or the like. Fortunately, the comms boards haven't changed in function all that much, so one from a slightly different model should be fine (as long as it has the right connectors).

Do you perhaps know what the point of the transformer is?

I'm guessing they are either trying to use as isolation in part of a DC->DC converter

Or more likely an AC->DC converter?

If it is the latter it is a much easier fix to just buy some pre-made AC->DC converters from Banggood

9 hours ago, Gnome said:

Do you perhaps know what the point of the transformer is?

It's to power the comms board electronics. A few diodes and capacitors on the outputs generate +12, -12 V, and very likely +5 for the USB chip and logic.

9 hours ago, Gnome said:

I'm guessing they are either trying to use as isolation in part of a DC->DC converter

Yes. It converts battery voltage (on the main board) to high frequency AC, which is transformed to various voltages to provide isolated power. Most of the electronics on the main board is referenced to neutral, which can have several volts of 50 Hz AC on it. This would wreak havoc with the comms, and with various faults and/or wiring errors, could provide a shock hazard to users.

9 hours ago, Gnome said:

Or more likely an AC->DC converter?

If it is the latter it is a much easier fix to just buy some pre-made AC->DC converters from Banggood

I suppose you could rectify (with a fast diode) and filter the HFPW (High Frequency PoWer), and use off-the-shelf isolating DC-DC converters for the various power supplies needed. It would be a bit of work, and would take up a fair bit of space.

I suppose you could use an AC→DC converter directly, but it would have to be one designed for high frequency input. Most would use ordinary diodes that are fine for 50 or 60 Hz, but no good for 20 kHz.

My partial trace of the comms board circuit shows only ±12 V outputs, but there could easily be another winding that I didn't bother tracing that produces +5 V.

On 2020/10/09 at 4:34 PM, Coulomb said:

Indeed. A sadly common problem with the comms boards is that the small transformer (technically a multi-winding inductor) overheats and there are shorted turns. Those transformers are one of the very few components that you can't order from an electronic component supplier; they are all custom wound. Check for discolouration of the transformer (the thing with yellow tape on it).

I've heard of people obtaining replacement communications boards from Ebay or the like. Fortunately, the comms boards haven't changed in function all that much, so one from a slightly different model should be fine (as long as it has the right connectors).

After reading your post, I tried with another comms board from another Inverter that I had at home. I checked and the two internal connections were the same, so I've tried but unfortunately doesn´t work. Also, I had checked the yellow film around the original comms board transformer and it looks good, however, the hot summer temps could likely overheat anything.

does anyone know the connections of the CN2 connector of the card such as tx rx +5 volts?
it is the second card that I replace and I would like to understand why ...

14 hours ago, solardavid said:

does anyone know the connections of the CN2 connector of the card such as tx rx +5 volts?
it is the second card that I replace and I would like to understand why ...

I note that if the comms board has a USB connector, that connector becomes CN1 and all the others go up by 1 (so for most of us, the white 6-pin connector is CN3). See this post for comparisons.

I have a partial schematic trace here.

2 hours ago, Coulomb said:

I note that if the comms board has a USB connector, that connector becomes CN1 and all the others go up by 1 (so for most of us, the white 6-pin connector is CN3). See this post for comparisons.

I have a partial schematic trace here.

thanks for your reply Coulomb .this card gives a lot of users a headache....
Reading on various forums many have had the same problem. In the end, it is only an isolated voltage converter (the ground of the output connectors and the ground of the circuit are separated by a capacitor) with a SC510070JDWE chip converter rs 232 usb nowhere to be found. my idea was to use an arduino 1 board without the microcontroller and take advantage of the usb rs 232 converter on board to communicate with the inverter.I have seen it done somewhere to update the pip firmware and if it worked for him why 'not to use it? There are also simpler converters and maybe even optoisolated but currently the card is in my drawer. Why not try?
The only doubt is about the mass of the two circuits (pc and inverter) otherwise why would they have kept them separate on the board?

I have the same board on inverter. And i have a datalogger wifi module. My supplier ask me to dissamble the lcd screen to my dalaogger work well with the serial port board installed in my inverter. 

That will work or not? 

9 hours ago, Youssef said:

And i have a datalogger wifi module.

Is this something internal to the inverter, that came from the factory?

Or something you have added on?

I'm not familiar with the WiFi modules, but I'll try and clarify your question for other readers:
 

9 hours ago, Youssef said:

My supplier ask me to dissamble the lcd screen to my dalaogger work well with the serial port board installed in my inverter. 

Are you saying that your supplier has asked you to disconnect your datalogger from some electronics behind the LC Display, in order to find out whether that fixes some serial port issues that you are having?

I can't see any harm in trying that, assuming that you can do it safely, and you don't mind breaking the seal and opening the cover.

Hi guys,

I have an old axpert SMD Lynx 5000-48 from a few years back which I decided to install as my home inverter.

I ordered the ICC module and USB to RS232 adapter to let the inverter talk to my Pylontech 3.5 lithium battery.

I connected the USB side of the adapter to the powered up raspberry pi and the RS232 end to the inverters RS232 port...

...pop and smoke...

I only saw afterwards that next to the RS232 port is a USB port which I am guessing is where I was meant to plug the pi in?!

I have obviously fried this comms pcb now and will need a replacement.

Does anyone know where I might find one?

Thanx a lot guys

Hi to everyone, Im loking for this board
16-500522-00G (B)

Привет,Вы нашли плату 16-501053-00G,

Может процессор живой и можете считать прошивку? У меня сгорел процессор.

I try to reactivate this old thread... the rs232/usb board of my old infinisolar 3k plus doesn't work anymore all the rest is fine. As the foto shows the inverter has been exposed the harsh weather of rural Sicily... I need to replace it since I need to urgently adjust parameters. Unless someone another way to access/set parameters? any hint will be useful! r

29 minutes ago, rolf_w said:

Unless someone another way to access/set parameters? any hint will be useful! r

Basically you can access all parameter settings directly on the inverter with the built in control panel.

11 hours ago, Beat said:

Basically you can access all parameter settings directly on the inverter with the built in control panel.

hmm, how you do that on the old hybrid models?

11 hours ago, rolf_w said:

hmm, how you do that on the old hybrid models?

The user manual should tell you.

unfortunately not all parameters can be set with the built-in screen and buttons. here the list of items that can be set:

12-4 Query Menu Operation

The display shows current contents that have been set. The displayed contents can be changed in query menu via button operation. Press ‘Enter’ button to enter query menu. There are seven query selections:

- Input voltage or frequency of AC input

- Frequency, voltage, power or load percentage of AC output

- Input voltage or power of PV input.

- Battery voltage or capability percentage.

- Date and time.

- Today or total energy generated.

- Mode of query energy generated.

I need to adjust e.g. the AC output timer and fine tune the charger (V_float), which requires the use of the SolarPower app and a working communication link I presume.