@tiger_cook Antifrost is definitely disabled on my setup, and I found it by trying to understand exactly what you’re going through now.
If you disable that setting, at 6C or below you will still see Sampling however at 60% pump speed periodically per your previous posts even if Space Heating is set to Off - that should be considered normal and the best you can do in LWT mode.
Unsure if you have the same issue that a few of us have resolved on the bigger units where tape heaters were always on when the pump ran (even above 6C!) - I shaved ~80watts (50%) off the power usage during sampling by fixing this issue that is for some reason the jumper cable is in place (incorrectly) for U.K. Daikin units.