Tado regulation erratic with Mitsubishi Ecodan Heat Pump ERST20D-VM6D
Hello,
A member of my entourage has a Mitsubishi Ecodan ERST20D-VM6D Heat Pump on which I connected a Tado X wireless receiver in dry contact (relay) and I do not understand why Tado does not regulate the heating correctly.
As you can see on the temperature graph of the main room on which there are 3 Tado X heads and a Tado X wireless temperature sensor, I set a permanent setpoint at 16.5 ° C; I have several cycles of temperature drop to 16 ° C (the room remains at 16 ° C for an hour) then it goes back up to 17-17.5 ° C, so the PAC runs for 2 hours then stops for 2-3 hours except that it is not necessarily ecological to do cycles of this kind on a PAC. Note that when the temperature drops below 16.5°C, the receiver does not start the relay and does not trigger the heat pump but waits until the temperature is around 16°C, except that a heat pump does not start immediately and it takes about 15 minutes for it to start producing hot water. And as for the thermostatic heads, they remain open even if Tado stops the heat pump while the circulation pump remains on 10 minutes after the boiler stops and the water has already cooled down since then.
I have already contacted Tado support but they remain evasive on this subject, saying that they cannot adjust the PID, which is insane for a heating control system of this type...
Do you have similar experiences? If so, were you able to solve the problem?