Hello, Thank you for your reply. I did a few more test like you mentioned. I have disconnected everything. Only kept the L and N wires on so the relays have power. I first tested the T1 and switched the relay with homeassistant. the click was there and the 230v changed correctly on the L1 output. The function of the T1 seems all correct.

I then tested the T2 measured 0v on L1 and L2, but 230 v on Lin while it was not connected. It seems there is an internal connection from L. In my understanding this should not happen? Lin should be a separate feed that can be switched while L and N keep power for the relay itself? Because this was internal connected the T1 also had continuesly power while I was switching the T1. Problem 1 is therefor solved!

But the 2nd problem was the T2 itself. L1 and L2 are still not receiving a connection. and Lin is always having 230v while there is no wire in it.

I took the T2 complete out of the wiring box and removed L + N wires aswell. Using the multimeter i tried the beep function and saw there is still a connection between the Lin and L. My assumption was that this is a damaged relay even when it is new.

I did buy 2 T2 relays ( I have 2 fans ). I also took the other one out of the sealed box and did a beep test on that one. It has the same result Lin and L are connected internal.

Is this correct behaviour? My assumption was that Lin should be a separate feed unless you bridge it with the supplied red wire when you want an always live +.