My Samsung gen 7 8kw is my 3rd heat pump since 2008. The original idea back then was to replace my oil boiler and generally speaking they did keeping us warm with improving degrees of success as we adapted/changed our heating system.
The Samsung has been in operation for around 18 month and is a complete change to the earlier dumb exhibits with its modulating, weather law etc and even at -11c today we are comfortably warm.
However it doesnt seem to have been optomised to live in the real world. I soon realised thanks to the data and much help from others that every cycling switch off as well as a DF results in hot water vanishing from our cylinder. Before the cold spell it was ending up at 20c during the day with little turning of the kitchen tap.
The previous ASHP’s defrosted in the same spectacular fashion but without any access to DHW using “The defrost mode is reverse cycle” to quote the literature and they successfully generated enough heat to do this while happily running perhaps reversed into cooling mode?.
Question is, why is this style of defrost not used on the present generation of ASHP I’m hoping one of our experts can explain….Thanks