podarok Posted April 25, 2021 Share Posted April 25, 2021 (edited) 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 April 25, 2021 by podarok Quote Link to comment Share on other sites More sharing options...
podarok Posted April 25, 2021 Author Share Posted April 25, 2021 After disconnecting Battery and power cycle I found some Bluetooth life It shows ID empty. And turns to ID connected, once I connected to it Other screens seems like empty After pressing power on - Bluetooth disappears Quote Link to comment Share on other sites More sharing options...
podarok Posted April 25, 2021 Author Share Posted April 25, 2021 (edited) Opened remote control box IC is hot like hell. 5V IC works well and supplies 5V, but also hot. Seems like connecting USB cable broke this IC. Edited April 25, 2021 by podarok Quote Link to comment Share on other sites More sharing options...
Coulomb Posted April 26, 2021 Share Posted April 26, 2021 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? Quote Link to comment Share on other sites More sharing options...
podarok Posted April 26, 2021 Author Share Posted April 26, 2021 I was using raspberry pi, connected to powerbank as a power source. Quote Link to comment Share on other sites More sharing options...
podarok Posted April 26, 2021 Author Share Posted April 26, 2021 Question: is there anywhere spare parts for these invertors. Wondering how much remote comm could cost Quote Link to comment Share on other sites More sharing options...
Coulomb Posted April 26, 2021 Share Posted April 26, 2021 (edited) 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 April 26, 2021 by Coulomb Quote Link to comment Share on other sites More sharing options...
podarok Posted April 26, 2021 Author Share Posted April 26, 2021 34 minutes ago, Coulomb said: Do you mean a totally isolated battery gizmo? Yes Xiaomi 20000 powerbank, connected via USB-C on Raspberry PI 4 King connected via USB->USB mini ( on King ) cable. Quote Link to comment Share on other sites More sharing options...
podarok Posted April 26, 2021 Author Share Posted April 26, 2021 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 Quote Link to comment Share on other sites More sharing options...
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