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