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Axpert King 5kW clone (Qdion) micro USB black screen issue


podarok
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Hi

 

I tried to connect my Axpert King 5kW via micro USB cable to raspberry PI computer USB port and found screen went completely black immediately

 

Linux on PI in dmesg

[  691.585744] usb usb2-port1: over-current change #4
[  691.734993] usb 1-1-port1: over-current change #4
[  691.798610] usb usb2-port2: over-current change #4
[  691.954955] usb 1-1-port2: over-current change #4
[  692.014637] usb usb2-port3: over-current change #3
[  692.178964] usb 1-1-port3: over-current change #3
[  692.234585] usb usb2-port4: over-current change #3
[  692.399057] usb 1-1-port4: over-current change #3
[  692.454588] usb usb2-port1: over-current change #5
[  692.622986] usb 1-1-port1: over-current change #5
[  692.670520] usb usb2-port2: over-current change #5

after disconnecting cable - screen stays black.

Inverter itself is working, AC/DC/AC connection is good. From Battery works well, PV array is not connected yet.

no BlueTooth advertisement from it( worked previously ), so no ability to see what's happening there. Disconnection of remote screen controller and connection back doesn't help. Screen stays black. Hardware buttons do not respond.

Did I brake it by just connecting USB cable?

Is there any "reset" procedure to return it back from "black" state?

Edited by podarok
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8 hours ago, podarok said:

Seems like connecting USB cable broke this IC. :(

It could be an earthing issue. Can you measure significant voltage (AC or DC, more likely AC) between the inverter metalwork and the metal of the USB connector?

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5 hours ago, podarok said:

connected to powerbank as a power source.

Do you mean a totally isolated battery gizmo? Was it plugged in to be charged? If so, via a 3-pin power plug, or 2-pin?

5 hours ago, podarok said:

is there anywhere spare parts for these invertors. Wondering how much remote comm could cost

The main source for spares like this would be from your supplier (whoever sold you your inverter). Though some parts are appearing on Ebay and the like, of totally unknown source, quality and compatibility.

I would guess US$80-150.

Replacing the microcontroller (an ARM chip, exact part number unknown) would be very problematic. It's a zillion pin SMD part, fine pin spacing, and I have no idea how to get the bootstrap loader into it. 

[ Edit: "and ARM chip" → "an ARM chip" ]

Edited by Coulomb
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41 minutes ago, Coulomb said:

Replacing the microcontroller (and ARM chip, exact part number unknown) would be very problematic. It's a zillion pin SMD part, fine pin spacing, and I have no idea how to get the bootstrap loader into it. 

not looking for this at all
 

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