Altherma 3 temperature leaving water wrong value

[dededucinqun]

Hello,
On an Altherma 3, do you know why this value is wrong?

Is it because there is only one zone?
Thanks in advance

[Arnold-n]

Your system does not have sensor R2T, you can configure the bridge to use R1T instead using command P43 1 followed by D5 to save.

[dededucinqun]

Thanks a lot Arnold, I will do that