Controller fails to restore from flash memory on cool start.


ACX5740 controllers are found to have lost configuration and programming after power loss. 

Product Line

Andover Continuum


  • ACX5740
  • ACX5720
  • NCII
  • BCX
  • B4920


Controller cannot restore data from flash memory due to the presence of corrupt or a flash backup that was saved before the controller was redeployed at another location or that has been upgraded to a different firmware version.


  • From the controller configuration page select Clear Database Backup and commit changes to controller. 
  • Reload the controller.
  • Backup controller to flash to ensure that current information is backed up.