٩@Coulomb

@BritishRacingGreen

I did fixed it...the fault orginally was bad connection unit some times work some times not...but once fixed

I introduced another fault by removing small capacitor nearby uc3845..i did replace that cap but with the wrong value.which altered the workibg frequency of the chip

Which chnaged the dc output voltage to very low..

With the right value cap ..the main sps produce 8vdc 12vdc and minus 12vdc  once i put everything back the unit work 

 

I hope gain entery link at other forum runned by mr   columb 

Under the address

"clone 24vdc sunon pro..battery sps and main sps

Could also be applied to many clones"

I hope the schematic i got from manufacturer get to many technicians out there.....

Its not easy get them...they gave it to me to fix thier unit cause the unit under  warranty if i failed they pay the customer back full refund

So they support me in whatapp chat 

Better than paying customer back

Edited June 25, 20241 yr by wael_fathe

8 hours ago, Coulomb said:

Its confusing to me that the second Sunon schematic says "bus soft start part schematic" (partly in English, mostly in Chinese, I used Google Lens to decode), and TX2/U16 is usually the bus soft start circuit (though usually driven with Q6 not Q7).

For a moment I thought that they used the DC bus to transfer power around, with the TX2 circuit merely enforcing a minimum of 150 V, but that can't be right because C69 is only rated at 200 V (unless there is another diode from +150V to BUS+).

Maybe they repurposed the soft start power supply to become the 150 V power supply (driven from the battery), and somehow soft start the bus some other way. That seems unlikely too. Perhaps it's just a copy and paste error.

The soft  start exist in mppt...typical of this clones..chinese manual full of mistakes..i wonder how they raise in civilization with horrific grammer and typos ...but they did and we are fixing thier units heheh

8 hours ago, Coulomb said:

It would be unusual, though not unheard of, for the capacitor to suddenly increase in value, so maybe R6 (825k, a fairly high value; these seem more prone to trouble) has gone high resistance or even open circuit. It might have a dry solder joint, and by knocking the capacitor, you also knocked that resistor's dry joint, or affected the cracked resistor.

I totally destroyed the timing(soldering iron slip) capacitor and  replacedi t with  wrong value  i base my decision on getting same color same size that was mistake

After i get right value i removed the previously installed cap and put new one with the precise value

 

All in order... the unit worked

On sunpal ..inverter 5k ..customer showed me error 02..

The error is due to over tempreture in mppt heat sink..i proved it cause when customer turned off mppt 

And use the inverter on batteries it work ok

He not have ac from utility...its a cottage in the desert. No way

Wierd enough the customer told me that error occur when battery is full while no or little load .

In the video he sent i also noticed that mppt draws 1k from sun  while battery is almost 53vdc that huge draw in a close to  full battery

 

Eaither  bad tempreture sensor

Or bad batteries that draw lot of current loading the mppt ..just i wonder why cpu throw a 02 on battery error 

@Coulomb

@BritishRacingGreento

Is the temperature reading (e.g. from Watchpower) believable? 

1kW (20A) when the battery is at 53V: is this a 15S LFP like a Pylontech?

I'm wondering if one of the MPPT IGBTs is leaky or breaking down at high PV voltage. The PV voltage would rise slightly near the end of the charge. 

Is the PV voltage particularly high? 

19 hours ago, Coulomb said:

Is the temperature reading (e.g. from Watchpower) believable? 

1kW (20A) when the battery is at 53V: is this a 15S LFP like a Pylontech?

I'm wondering if one of the MPPT IGBTs is leaky or breaking down at high PV voltage. The PV voltage would rise slightly near the end of the charge. 

Is the PV voltage particularly high?

Tabular battery from india i think..

The man. Left the. Unit working outside and in harsh cirumstances

So sensor could be bad

 

I not know how to watch the inverter using software ..but try to google the method 

today i  repaired inverter with error 52  with only replacement  of sg25xx  ic    logical repair as bad ic wont send enable dc-dc  stage to work  no dc to dc  = 52

no  dc to dc due to  shorted  high volatge bus =  09  

On 2024/07/01 at 2:07 AM, Coulomb said:

Is the temperature reading (e.g. from Watchpower) believable? 

1kW (20A) when the battery is at 53V: is this a 15S LFP like a Pylontech?

I'm wondering if one of the MPPT IGBTs is leaky or breaking down at high PV voltage. The PV voltage would rise slightly near the end of the charge. 

Is the PV voltage particularly high? 

solved  customer reverse  fan  and the extra cooling  convinced the marginal   tempreture sensor to stop  fault 02

its  sure an mppt  sensor as the inverter  work endlessly  fine with out solar  ...customer have left his inverter outside the cabint   i opened it and  saw   one of the worest capacitor degradation process in my life

caps  back  to  its orgins  just a paper roll!

Hi @naywinthu16  is battling to bring up his Axpert MAX 11kw twin . Fortunately , as he correctly stated there is little difference between his machine and the MAX 7.2 we are using as a reference machine on this thread. It appears that he cannot even get the SMPS up .

 

@naywinthu16 have a look at the posts on pages 21 and 22 of this thread in order to debug your smps. the link below is for your reference 

and this one :

 

 

 

Edited July 9, 20241 yr by BritishRacingGreen

He also has some 11 kW Twins that won't charge. I wasn't thinking of the current sensor that the high PV voltage models seem to have, e.g.

 

A report of having fixed such a problem (no charging) here: https://forums.aeva.asn.au/viewtopic.php?p=102221#p102221

Worth keeping in this thread, I think.

Yesterday i. Was testing an inverter primary side mosfets   waveform using  scope...using columb trick of u19shorting......i notice that sg2535 is having some heat...is that normal

Like if left finger too long for minute...its becomes hot to touch any more

Power supply drawsnormal 0.15amp

Any guess @Coulomb

@BritishRacingGreen

18 hours ago, wael_fathe said:

Power supply draws normal 0.15 amp

If the power draw is normal, then surely the temperature must be normal, assuming that both +12V and -12V rails are normal. 

Sorry, I didn't know the usual temperature of that chip. I assume that it's through-hole for a reason, i.e. it probably would get fairly hot. 

ERROR 32. I am looking for firmware for AXPERT VM 4 3600v. The flood was 61.01 and 22.20

On 2024/07/16 at 1:48 PM, wael_fathe said:

sg2535 is having some heat...is that norma

Yes it does get pretty hot. If the waveforms are okay then it is operating correctly

On 2024/07/21 at 10:25 PM, ladislav said:

ERROR 32. I am looking for firmware for AXPERT VM 4 3600v. The flood was 61.01 and 22.20

Try looking at these threads:

or

 

7 hours ago, Shadders said:

Try looking at these threads

Thanks for referencing my thread. However, it doesn't contain main firmware for the non-TWIN variant of VM IV nor display firmware, as these two firmware are different than the ones for normal non-TWIN models.

Here are the latest available main and display firmware for VM IV non-TWIN variant uploaded by Coulomb:

VM IV non-TWIN Main firmware: https://powerforum.co.za/topic/19607-firmware-voltronic-axpert-vm4-5600w/?do=findComment&comment=201206

VM IV non-TWIN Display firmware: https://powerforum.co.za/topic/19607-firmware-voltronic-axpert-vm4-5600w/?do=findComment&comment=201271

For an insight about these firmware versions:

On 2024/07/06 at 9:42 AM, Coulomb said:

I don't know about 61.01, but 61.03 is almost a year old as I type. The only other two I have in the 61.xx series (61.64, 61.65) are several months older than that.

22.20 is almost 2 years old; 22.21 about 6 months old.

Edited July 23, 20241 yr by Tarek Yag

On 2024/07/21 at 11:25 PM, ladislav said:

ERROR 32. I am looking for firmware for AXPERT VM 4 3600v. The flood was 61.01 and 22.20

I just posted latest available firmware versions for you

Updates

 

First the sg get fairly hot and that is normal ...at working fans. Are directly facing sg and the temp never get sensed well using ur finger

 

When we do columb trick of shorting copluer u19 no fan will spin and that is where ur finger sense the temp

 

 

Another update ...use columb trick when ever possible...even if all component test good u will burn things ..here is. A case ..

Where one leaky diode test good in forward...and taste some leakage of 2.2in diode mode...i thought it be some partallel component

 

But once diode out of board i taste in both direction one gave 0.6 ok in other it gave 2.2. Bad ...good diode never test in both direction

 

My testing skill failed...once i apply trick i notic on set of mosfets give this cut waveform...which led me to test all components related to thses fet extensively and precisly and out of board

Columb trick is Day saver 

On 2023/07/30 at 8:08 AM, BritishRacingGreen said:

This failure calls for a method not unlike the first MAX I repaired. You need to power the system rail supplies and test the mosfet and igbt drivers meticulously without any battery or grid or pv power. 

On the Max its easy, there is an external SPS supply that you substitute with your own 60v input. This will then power up the system smps. 

On the older 5kw axperts its not that easy. The smps is powered directly from the battery, and one will actually have to make a nice pcb track cut in order to inject external power. 

How can I join that WhatsApp group?? 

Or can you assist me with your WhatsApp number?? 

hey who can help me  i have a voltronic inverter i turned the inverter off and when i come to turn it on it didn't turned on at all and i tried to turn it with utility and didn't work no sound and no screen 

15 hours ago, hadialjawad67 said:

i have a Voltronic inverter I turned the inverter off and when i come to turn it on it didn't turned on at all and i tried to turn it with utility and didn't work no sound and no screen

Can you measure the battery voltage with a multimeter?

Hi,

My inverter is an Axpert max 7.2

Same kind of issue here. This night (of course when i was sleeping), there was lightning and thunderbolts.

When i woke up, no juice in the house... Axpert still on, but battery very low.

I try to rearm utility and each time axpert shortcut the house.

It's working without the grid, i let it load the battery till 100% today, but without powering the house.

What i've tried:

 - directly power the house from the grid (without the inverter). It works

- changed my circuit breaker (between grid'n inverter) nothing change, still in short cut.

So if you got an idea or a lead (i'll open the axpert).. Something wrong in the grid input side.

And no error on the communication or screen

Thanks

Fred

Edit: Next step, try to power the house from the axpert, but offgrid.

Edit: just seen that i've got an eeprom fault (was not here this morning)

Edited August 12, 20241 yr by coxifred

On 2024/08/02 at 1:29 PM, Coulomb said:

Can you measure the battery voltage with a multimeter?

yeah i measured the battery and it's full and now i changed the inverter but i need to get the old one working

On 2024/08/02 at 1:29 PM, Coulomb said:

Can you measure the battery voltage with a multimeter?

yeah it's full

On 2024/08/02 at 1:29 PM, Coulomb said:

Can you measure the battery voltage with a multimeter?

yeah it's full