CO sensor has detected CO at non secure level

 | Data byte | Description | 
 | :---------: | ----------- | 
 | 0 | User defined data. | 
 | 1 | Zone for which event applies to (0-255). 255 is all zones.         | 
 | 2 | Sub-zone for which event applies to (0-255). 255 is all sub-zones. | 

If both or one of zone/sub-zone are omitted they should be interpreted as if they where 255.
