Спасибо.
Нашел описание аналогичной проблемы тут -
forum.fibaro.com/index.php?/topic/15936-fgk-101-leds-blink-code/?hl=%2Bdoor+%2Bsensor+%2Bblinking#entry40737
К сожалению, дискуссия там мало полезна.
Процедура сброса, которую я выполнял, описана в инструкции, цитирую:
2. Resetting the Fibaro Door/Window Sensor
There is one way to reset the Fibaro Door/Window Sensor. The procedure cleans its EPROM memory, including the main controller and Z-Wave network data.
To reset the Fibaro Door/Window Sensor please follow below instructions:
1) Take off the Sensor's cover and remove battery. Make sure the TMP button is intact.
2) Touch the Sensor's body with a magnet,
3) Insert the battery,
4) Within 2 seconds remove the magnet from the Sensor's body, the LED will turn off. Wait 3 seconds until the LED starts blinking.
5) Remove the battery
6) Re-install the battery,
7) Reset will be confirmed by LED blinking
Через несколько секунд после сброса датчик опять начинает мигать.