Samsung Gen 6 R32 5kW + Sunamp Thermino (plenty of questions inside)

[jakeymd1 (Jake Dawson)]

The users on here have just put it down to poor control on Samsung’s part. There have been plenty of discussions on the forum about it, but most recently here:

Anyone use Quiet Mode with Samsung ASHP to reduce cycling?

My AE080BXYDEG/EU is about 2 x oversized (installer’s conservative MCS calcs, as usual), so cycles every 30min despite a 50 litre buffer tank in the CH circuit. The ASHP compressor is nominally fixed speed but the manual hints that the one way to force a reduced speed (hence power requirement, hence cycling) is to enable Quiet mode. Has anybody tried this, and if so does it affect ASHP power (i.e. increase CoP)? Thanks!