Good Day,

I have voltronic VM3 5Kw inverter, it start to disconnect output for 5 sec and reconnect it 

Do this 3 to 4 time then remain stable for whole day ,I service in detail but make no difference

Kindly suggest what will be the issue

On 2021/05/01 at 1:34 PM, Imran Aslam said:

Kindly suggest what will be the issue

It might be an intermittent short and/or overload. [ Edit: in your appliances / loads, not internal to the inverter. ] Do you have fault recording on? Can you see any faults recorded? Does it turn on the red fault LED when the output goes to zero? It doesn't look that way from your second photo.

You seem to have a full battery (per the crude SOC meter) in the second photo. What is the battery voltage when the output goes to zero?

 

Edited May 2, 20215 yr by Coulomb

When output goes to zero battery is full 54 volts,

Load is constant and under limit

One thing is serial code of inverter automatically changed now it's not it's original serial number as stated on side sticker

I think it's firmware corrupt need reflashing

 

11 hours ago, Imran Aslam said:

When output goes to zero battery is full 54 volts,

Ah. If you have a Pylontech battery, that's the never-exceed disconnect-to-save-battery voltage. That could be causing the disconnects.

If you are using the direct-to-BMS cable (I don't see one in the photo), then perhaps a later version of the removable display firmware may control the battery voltage better. 

If you are using battery type USE, you should be using the lower battery voltages, as in this image:

11 hours ago, Imran Aslam said:

One thing is serial code of inverter automatically changed now it's not it's original serial number as stated on side sticker

I think it's firmware corrupt need reflashing

Was the serial number (as shown on the sticker on the side) ever used? You say it's changed, so that sounds unlikely. Was the control board changed at one point? New control boards have to be programmed with the correct serial number.

Is the new serial number all 5's and 3's, starting with 553555... ? This indicates a "blank" or unprogrammed serial number. That is most unlikely to be caused by firmware corruption; the serial number is stored in an EEPROM chip on the control board.

Is the new serial number all 5's and 3's, starting with 553555... ? This indicates a "blank" or unprogrammed serial number. That is most unlikely to be caused by firmware corruption; the serial number is stored in an EEPROM chip on the control board.

 

I have an Axpert 5KW/4KW invertor that shows this "blank" serial number and consistently drops out from the WatchPower monitoring software to the extent that the laptop computer with the monitoring software needs to be restarted.

Could this blank serial number be the cause?

The same computer was used to monitor a similar setup with a Mecer labelled 5KW/4KW Axpert inverter without any problems except taking longer and longer to collect and graph daily data.

Sunnie

On 2021/05/04 at 9:43 AM, Sunnie said:

except taking longer and longer to collect and graph daily data.

Could the laptop's hard drive be in the way out?

On 2021/05/04 at 9:43 AM, Sunnie said:

Could this blank serial number be the cause?

I doubt it, but I guess it might be another way that Voltronic "get back at" the clone manufacturers (who often point their customers to Voltronic Power's Watchpower to control their inverters, having paid nothing for the development of that software.

On 2021/05/05 at 1:35 PM, Coulomb said:

Could the laptop's hard drive be in the way out?

Seems that the drive is nearly full and the swap file size is too large for the available space.

 

On 2021/05/04 at 1:43 AM, Sunnie said:

I have an Axpert 5KW/4KW invertor that shows this "blank" serial number and consistently drops out from the WatchPower monitoring software to the extent that the laptop computer with the monitoring software needs to be restarted.

Other than the fact that this drops off line from the WatchPower software regularly there does not appear to be any strange behaviour of the inverter. Is there anything that would need to be done to register the control board and would it be possible to update the firmware on the system to one that is more friendly to LiFeP batteries?

On 2021/06/01 at 8:11 AM, Sunnie said:

Is there anything that would need to be done to register the control board

To get a proper serial number, you need special software, specialised for your specific new serial number, which as far as I know can only come from Voltronic.

Quote

and would it be possible to update the firmware on the system to one that is more friendly to LiFeP batteries?

Depending on the model, you could update to the LFP flavour of patched firmware. See Can I update my inverter. Edit: some clones can't be firmware updated at all.

Edited June 2, 20215 yr by Coulomb