Status Messages, Troubleshooting 123 
 
Legend for the Table "Status Messages" 
Status Signals 
A  Status "Failure"  A status has occurred in the gas analyzer which requires the 
immediate intervention of the user. The measured value is invalid. 
W Status "Maintenance 
Request" 
A status has occurred in the gas analyzer which will soon require the 
intervention of the user. The measured value is valid. 
F Status "Maintenance 
Mode"  
A calibration is being carried out in the gas analyzer, or the 
maintenance switch has been set to "On". The measured value is not 
a process measured value and is to be discarded. 
S  Overall Status  The overall status is always set in conjunction with the status "Error" 
and for individual messages in conjunction with the status 
"Maintenance request"; it is not set in conjunction with the status 
"Maintenance mode". 
Status Message Categories 
a  Active status messages not requiring acknowledgement  
aQ  Active status messages requiring acknowledgement  
aL  Active status messages requiring acknowledgement and troubleshooting  
iQ  Inactive status message requiring acknowledgement