ACX2 Error Log shows 0x00004433 errors.


ACX57xx runs for several hours then card readers stop reading and controller appears to be locked up.

Product Line

Andover Continuum


  • ACX5720
  • ACX5740
  • Access control


The ACX2's M430 chip (reads the card swipes) is out of sync with the main processor so it can’t send the card swipes.


To clear this issue do the following.

  1. Clear its DB backup
  2. Power down the ACX2
  3. Remove the battery
  4. Wait 5 minutes
  5. Power up
  6. Reload