paulcoop

Hi All. I have a Ecodan ASHP connected to an underfloor system. On controller the flow input temperature target is set to 45 but after a few hours it can't get past 40 degrees. What can cause this and what's the solution. I have a second of the floor that's pretty cold yet the loop has 1.5l fliw rate. What would cause this . Last up the differential pressure bypass value seems to be fitted upside down. What effect would this have on the system? ( see pic) Thanks Paul