This is an error code; this could be something very minor to a major issue with your beacon. Please check the attached sheet to find your code and see what the proper measures are that need to be taken.
Most of the time these codes come up due to surrounding interference. If you turn off your device, move away from any interference, and restart your device, any error codes should disappear.
If you do have an error code that continuously appears when the device is started, contact Black Diamond Warranty and cease use of the device until it can be checked.