I have one more question, have you tested the modulation of your unit on heating and cooling? I have the same unit as you and in cooling mode it goes down beautifully with power up to 150-200W and runs smoothly without interruption, in heating mode the unit does not go below 550-600W which causes frequent switching on and off. I wonder if there is a way to improve the heating performance because according to the data sheets, the heating output should also be up to 140W.