EBME Forums Forums Maintenance Technical Assistance Hamilton C2 software update

This is error " TECHNICAL EVENT: 232034".
This ventilator have a software version 2.1.2.
The cells are original, maybe you can even calibrate, then the visual warning with sound alarm appears.
All cells that have serial numbers < Z39xxxxxx do not give the error.
When I install a new O2 cell (s/n > Z40xxxx) in the technical state the serial number is not updated and gives the error.
Another Hamilton C2 with software version 2.2.5 updates the serial number in the technical state and everything works normally.
Thanks