Is it possible to replace the door lock with one with "memory" like the 102275?
It does have the disadvantage of staying unlocked if the door isn't opened then shut when first unlocked.
Would like to see a video of the operation.
From what I understand from the LED test light the mechanism is unlocked with a 12 volt pulse and then relocked from the second pulse and both pulses appear to have the same polarity.
For that to work most likely the wires from the lock mechanism would need to be reversed.
Meaning it sends current through the lock in one direction to unlock then in the reverse direction to relock.
To do that there must be electronics in the outdoor panel for reversing the leads either electronically or using a relay.
Makes things a little more complicated.
Getting back to the manual, there isn't a setting that shows the Lock icon?

 

Is it possible to replace the door lock with one with "memory" like the 102275?
It does have the disadvantage of staying unlocked if the door isn't opened then shut when first unlocked.
Would like to see a video of the operation.
From what I understand from the LED test light the mechanism is unlocked with a 12 volt pulse and then relocked from the second pulse and both pulses appear to have the same polarity.
For that to work most likely the wires from the lock mechanism would need to be reversed.
Meaning it sends current through the lock in one direction to unlock then in the reverse direction to relock.
To do that there must be electronics in the outdoor panel for reversing the leads either electronically or using a relay.
Makes things a little more complicated.
Getting back to the manual, there isn't a setting that shows the Lock icon?
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View attachment 360749

So sorry for the slow responses. Xmas and busy period, etc. My domestic boss emailed the company and very (very!) surprisingly got a reply. They said a "gâche électrique à 2 temps" is required. Not sure what this translates to, but apparently it unlocks, stays unlocked until the door is closed again. Which is EXACTLY as you described (I think) in your last post! So sorry it's taken this long to (probably) work out the solution. The instructions really should have stated what was best to get. So do you mean a lock like this (https://www.amazon.fr/-/en/Avidsen-..._tag=se&keywords=102275&qid=1770907277&sr=8-1). It doesn't say in the description that it remains unlocked until the door closes. But is this what "102275" means?

 

I believe so, the description mentioned a mechanical memory that holds the lock open until closed.
That should be compatible with that 1 second lock release time.

 

I believe so, the description mentioned a mechanical memory that holds the lock open until closed.
That should be compatible with that 1 second lock release time.

Thanks so much for your help. To you and others that contributed. We bought a mechanical memory latch and it does what we want it to do, now, with almost a full week of carefree use. Unfortunately the same shop didn't even explain the different options in the first instance, otherwise obviously we'd have gone for the mechanical memory system. So that was disappointing on the part of the shop. I feel the instructions should have been specific about what type is best to get (unless I missed it). All that said, the after sales' support was good from the visiophone company. Well, a complete novice with these lock systems, but now better equipped with knowledge should there be a next time. Thanks again!