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I have been using P1P2MQTT for a while now and I am loving it. But so far I did not have much need to control DHW heating. Now I have gotten some solar panels and would like to use extra power for DHW: Reheating before sunset and increasing the setpoint when excess power is available.
Unfortunately, neither increasing the setpoint, nor enabling boost, nor toggling DHW mode, nor toggling heating would trigger water heating. The heatpump just remains idle until the temperature drops below the old setpoint minus hysteresis and does not care about anything I change.
To make it clear: I do not think that this is an P1P2MQTT issue (hence a discussion thread and not an issue). I can see the new settings on the heatpump's control panel as well as in the Daikin app and changing setpoint or boost mode in the Daikin app does not have any effect either. Also, I can see all the changed settings using ESPAltherma, so the settings find their way to the heatpump.
At the moment I am suspecting two things related to summer temperatures:
I know that the heatpump cannot go beyond 45°C if ambient temperature is above 25°C (that is without electric backup heaters, which I have disabled). Since my normal setpoint is 45°C I could imagine that the heatpump will just internally use the upper limit due to ambient temperature, which is the same, so nothing happens. (Should do some testing at night, but at the moment the tank temperature will just hit the regular reheating point after sunset, which is why I am so interested in triggering it a bit earlier.)
Right now the air temperature is reported as 24°C and still nothing happens. But I have also observed some situations in which the temperature would drop way below the reheating threshold (setpoint minus hysteresis). This often happens when the ambient temperature is high enough to cause the heatpump to enter "Fan only" mode. If that happens it seems to completely turn off the outdoor unit as none of its sensors would update at that point. But I have also seen that it would not reheat the water for a long time even if its temperature has dropped significantly. So far, this has not been bothering me, but I think that I remember reading somewhere that this is a firmware bug.
So, my question is: WTF, Daikin?
But more specifically to the P1P2MQTT users: Is anyone else struggling with this? Any ideas or workarounds? Or maybe I am just missing an important setting here?
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I have been using P1P2MQTT for a while now and I am loving it. But so far I did not have much need to control DHW heating. Now I have gotten some solar panels and would like to use extra power for DHW: Reheating before sunset and increasing the setpoint when excess power is available.
Unfortunately, neither increasing the setpoint, nor enabling boost, nor toggling DHW mode, nor toggling heating would trigger water heating. The heatpump just remains idle until the temperature drops below the old setpoint minus hysteresis and does not care about anything I change.
To make it clear: I do not think that this is an P1P2MQTT issue (hence a discussion thread and not an issue). I can see the new settings on the heatpump's control panel as well as in the Daikin app and changing setpoint or boost mode in the Daikin app does not have any effect either. Also, I can see all the changed settings using ESPAltherma, so the settings find their way to the heatpump.
At the moment I am suspecting two things related to summer temperatures:
So, my question is: WTF, Daikin?
But more specifically to the P1P2MQTT users: Is anyone else struggling with this? Any ideas or workarounds? Or maybe I am just missing an important setting here?
(My heatpump is a Daikin Altherma 3 R W.)
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