@Michal_S My idea is not to disable DHW operation, but to disable the DHW circuit at all. Meaning the controller won’t even think there is a 3 way valve, and therefore won’t try to operate it. I’m not sure if the valve position will be operated when the DHW circuit is “unpresencified”. The key concept here is that the ASHP does not forcefully have a DHW circuit builtin.
Translation in NASA world, it would mean to turn FVS#3011 to 0 instead of 1 or 2 (depending on your setting). And only turn the DHW FSV#3011 to 1 or 2 during a period of the day to generate some DHW.
I don’t know if this gets clearer.
Cheers