@Medegan emergency mode means that the internal camera battery is empty. That could be caused because the camera was not powered for a long period of time, from a defect POE Switch that causes often Power Fails (this could result in the long run complete battery failure).
To fix this you should do the following steps:
Leave the camera to charge for at least 24+ hours. (Check System Up time in Camera status menu to be sure you dont have a defective Switch)
Set the time again even if it is correct.
Temporally cut the power directly from the POE Switch.
Its important that everyone of this steps its done. After you are done and the camera is still in emergency mode send a camera report to firstname.lastname@example.org
After the process is successfully finished, if the camera is in POE class 2 you can change in to class 3 . (cut of power is also required in order to take effect)