Not sure about the beeps.
What do you mean by disable float, and why would you want to do this? If you're asking because you've read LFP batteries don't need float, that's wrong in this context. If you're going to charge LFP and put it on a shelf and not use it, yes, you do NOT need to float it.
In a solar power system, you need a float voltage to prevent the battery from powering the loads when PV is available for the loads. The float voltage serves as a "floor" to hold the battery at near full charge, and allow PV to power loads.
If you really want it to stop charging after absorption is completed, you can simply set float to a very low voltage.
If you want it to keep charging and not drop to a float voltage, you can set float 0.1V below absorption.