wierd overnight power draw of LG Therma V R32 monobloc 9kW AWHP

[chris47]

I appreciate that the overnight power draw is not wasted but is heating the DHW tank, but my concern is the relatively 'short cycling' damaging the CoP and/or compressor life.

[Dillsue]

If all your scheduling is done within the Honeywell programmer can you turn that off overnight and see if the HP continues starting up? That will rule out the programmer. 

 

If you think it could be the HP topping up the buffer then can you turn the buffer set point temp right down before you go to bed? That should stop the buffer being topped up.