Pylontech BMS (SC1000A-200E) PowerCube M1 (23x H32148)

Hi,

we are struggling with issue, that BMS is in some protection mode.
There is no external communication. Relay state is still Open (should be Closed)
Relay is OFF; (should be ON)
Relay disable flag: 0x1000

Voltage from batteries is passing tru (750V-800V); Relay must be working, I hear swapping clicks very well.
Also I am able to control relay with command ctrl relay1 on; ctrl relay 1 off
After tbstart command relay is ON; state Closed; but only for next reset or some change.

This issue happened when Solinteg inverter was connected directly to BMS; and not via MBMS. Probably during updating firmware of inverter.

What command could inverter send to BMS to stop using external communication (CAN; RS485; LAN) and keep relay OFF.

Did anyone solve this issue before?

relayinfo disable flag