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Help needed: Sunsee (Axpert MKS Clone) 3KVA 24V 2400W stuck on firmware screen U1 17 04

Solar_Tech_26
in Inverters

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Hi everyone,

I am an electronics technician repairing a Sunsee 3KVA 24V 2400W inverter (Axpert MKS Clone with 145V max PV).

The main control board was replaced with a new one (VER2.1). I tried to program the EEPROM (24C04) with the correct serial number (1912491300034) and rated power (3000VA).

Now, upon power-up, the LCD screen lights up but gets completely stuck/frozen on the firmware version screen "U1 17 04".

It seems like it's failing the initialization or missing factory calibration data in the EEPROM. Does anyone have a clean, original EEPROM dump for this specific model (MKS 3KVA 24V 2400W with PF 0.8)? Or any advice on how to bypass this initialization freeze?

Attached are the photos of the inverter label and the frozen screen.

Thank you in advance!

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