Class I - Dangerous
The software in the fire alarm system could fail to process an alarm condition which could result in the system failing to respond in the event of a fire.
Notifier, of Northford, Conn.
Class II - Moderate
The AEU can enter a "sleep" mode, where it does not communicate with the system. When this occurs, audible evacuation signals associated with the failed AEU will not operate and building occupants may not be warned of an emergency.