Search designation / installation instructions ELRO door intercom

Hello dear forum community,

I have been looking for an installation manual for my ELRO door intercom system for some time now. Unfortunately, I cannot find a type plate anywhere. Can someone help me? I have attached a picture of it.

Thank you in advance.

Best regards, Danny

Just try a search engine of your trust and you will find the manufacturer. They have a customer hotline.

Nameplate will probably be inside the door intercom system?

First post... Well... Interestingly, there are always people who feel the need to point out search engines in a condescending manner. However, my question was not about how to use search engines. But, thank you.

: I guess you are right. The problem for me is that I have to open the case without causing damage to fix a contact problem, which unfortunately I haven't been able to do. That's why I'm looking for instructions. Well, I'll give it a try. If all else fails, I'll have to get a new one.

Best regards, Danny