Nuki Opener + Koch VT40

Hello,

I have connected my Nuki Opener to my Koch VT40. Although the instructions in the app only show the VT42, it seems to work (mostly). The only problem I have is that when I activate Ring to Open and ring the doorbell at the apartment door, it does not open the door. However, when I use the doorbell at the apartment, Ring to Open then opens the door downstairs. I am assuming I have misswired one of the wires, does anyone have any suggestions.

Here is an image of the standard wiring before I installed the Nuki - I used the first 3 wires - White into port A (left on the adapter) and the next two for the right hand hole on the adapter.

Thank you!

Anyone have any thoughts?

Just found out from the Manufacturer that the lines are as follows:

A - Bus +
B Bus -
E - Apartment Doorbell Actuator
P + Spesig
M - Spiesig
T1 - Video
T2 - Video

Hi
Long shot but still… @remsta did you get the opener to work after all? I am struggling with mit VTC42 and can’t get the door to open by ringing at the entrance.
Cheers,
Alex

Hi @AlexanderP
I did but we have moved apartments twice since then. I have looked through my photos and unfortunately, i did not take a photo after it started working, only how it originally was. But based on the wiring info above, I was able to get it working relatively quickly.

Sorry I couldn’t help more.

Remi

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