Daikin alhterma LT ERLQ016CW1 + EHBH16CB3V

Good evening everyone,

This forum is very nice and interesting. I would kindly ask you for help for my Daikin altherma LT ERLQ016CW1 + EHBH16CB3V. I'm using it for floor heating and low heat radiators. I have realised when floor heating for living room is working(4 loops, size 50m2 and 1.9l/min) output temperature is falling down. For example I have set desired flow temp. 40 degrees, but is giving always 5 degrees less around 35(when you check informations page of actual temp). If I set 45 it will give 40 deg. Return is around 30 deg, but whatever settings of delta T are it will behave like that 5-6deg then set point. I think I have seen somewhere on this forum that somebody had a same issue with 5-6 deg less temp then actual set one. There is no DHW tank and weather depend and schedule is off. According to my technician everything is fine, but I don't think so.

Thank you in advance.