== Lid not closed completely ==

It may happen that the Lid is not closed completely, although the sensor claims it is in place.

* Make sure the bias voltage is turned off (in case it is already bright outside.
* open and close the Lid again

== Emergency Procedure ==

Find attached the emergency document for manual lid operation. 

Further documentation about the automatic lid, can be found at https://trac.fact-project.org/browser/firmware/ShutterController/docs

== Lid in Locked state

__Security Limit__

lidctrl goes to Locked (after closing the lid) in case the lid is not closed at the end of nautical twilight. 

__Solution__

- investigate why lidctrl went into Locked 
- check whether the lid is properly closed
- report in the logbook what happened
- in case you consider it safe, you may send UNLOCK