DIY - replacing manual shutter roller wall switch with smart one

[Kallo444]

Hi Everyone, DIY advise required here please.

I have the following wall switch, currently wired in as below and controlling external roller blinds.

View attachment 105723

Inside the wall view has additional wires.
View attachment 105724

My DIY project is to replace the wall switch with a smart one below





And here is my wiring diagram




After switching ON the main fuse, the smart switch power ON for a second and another fuse tripped.

Do you see anything incorrect with my diagram or it was perhaps loose connection that tripped the fuse?

Many thanks in advance for looking into this!

 

[westward10]

How have you verified that blue is actually a neutral.

 

[Kallo444]

How have you verified that blue is actually a neutral.

Thanks for the quick reply, no actual testing of neutral was done. Just assuming EU colour codes were accurate and blue=neutral.

 

[westward10]

What actually tripped an mcb or rcbo.

 

[Kallo444]

What actually tripped an mcb or rcbo.

Looks like MCB, as below

Eaton CIRCUIT BREAKER 2TE (PLZM-B13/1N-MW)​

 

[westward10]

That is just a circuit breaker. So the one that trips is not the circuit for the shutter?

 

[Kallo444]

That is just a circuit breaker. So the one that trips is not the circuit for the shutter?

Yes, that's correct!