Bosch CS6800i wärmpumpe heizung und warm wasser nicht funktioniert

[Akella1]

For two days now, my Bosch CS6800i heat pump heating and hot water system has not been working properly. In the morning after 6 p.m. the hot water temperature drops below 20 degrees and the same applies to the heaters. In the evening around 4 p.m. the temperature rises again. I have connected an external water storage tank to the heat pump. Does anyone know what the problem could be?