The BBU is equipped with an audible alarm to inform you of issues with your BBU. The alarm sounds for two seconds and then is silent for 58 seconds. The conditions listed below are the potential reasons for the audible alarm. you can use the alarm in combination with the indicator lights to troubleshoot your BBU issues:

Low battery:  Alamr is silenced if the battery voltage goes above 12V (electrical power has returned) the battery is fully discharged or the battery is removed from the BBU.

Foreign Voltage: Alarm is silenced once the foregin voltage has been properly removed.

Replaced Battery: Alarm is silenced when the battery is removed

Overcurrent: Alarm is silenced once the overcurrent has been properly removed