Same fault here on a Q350 (firmware 1.7.0, SHT30): front display completely dead, green LED on the main PCB lit, and exactly these ten error codes. After a restart both fans ran for about a minute, then the unit switched off the fan for the supply air.
It was the outdoor air sensor (ODA, the "top" sensor), more precisely the corroded capacitor next to the SHT30 on its small board. With that sensor plugged in, the communication with the other sensors and the display was disturbed.
Quick check, with the unit unplugged from the mains first: unplug the outdoor air sensor at the main PCB. It is one of the two green connectors, on the side where your outdoor air duct is connected. If the display comes back and only SENSOR_ODA ERROR remains, it is that sensor.
I only replaced the capacitor (100 nF, ceramic) and coated the spot with conformal lacquer afterwards. All errors have been gone since, and I did not have to replace or rebuild the sensor itself.
A more detailed write-up with photos, fault-finding and the repair:
https://kreasteve.de/en/comfoair-q350-display-schwarz/
Steven
