In the error log, user sets alarm rule if sql server has word "Error" in sql log file. It does not show yellow even the error count > 1.
User also checked "Error Log Scan" scheduling setting as default which is 3:00 AM every day.
This is product defect. Defect JIRA:SOSSE-2002:" Error Log-Error Count alarm wasn't raised on the Error Log control" - the fix request has been created to address it in a future release.