I would get the receiver level at 20-30% with all systems calling.
I think your receiver is jumping up due to systems off and LLSV's denergizing, liquid is backing up into receiver and then when all of the circuits are calling you go to zero in the receiver since the liquid needs to move from receiver to circuits. And I am only responding in the way you posted. If it aint that then we need more info. For example. Is this a flow through or is it a surge style of receiver?
I'd set the rack head pressure as low as possible, which right now in florida, I doubt she can drop below about 180 in the ambient you have at the moment.
I think most hussman racks of newer 404 design want to see a fan cycle head pressure at 205, Hold Back set for 200 and the receiver bypass at 195.
But I also think hussman only uses that as a guide that a guy could use and be safe. There should be engineering specs on the rack inside the control cabinet and they will state their desired range of head pressure. Some guys think that is the bible, but I have been lucky with departing from that a little.
I just set 2 new hussy racks. and I got my head down to about 160 with out going in the toilet. So. I then picked 180 as my benchmark for fancycle, 175 for hold back and 170 for receiver. And we will see how she does here over the next few weeks. I have the perfect weather at the moment to be seeing if my setpoints are good or need to be tweaked a bit since my ambients are ranging up and down by 50 degrees.
And remember, amount of liquid is important. As you set your controls, some refrigerant may need to be added. Some might even be able to be taken out.
Anytime you see your head all dicked up from the last ten idiots, you kinda gotta start from scratch.
I have gone on leaks, and had to add refrigerant to get things online, then end up having to set the whole friggin rack up so it runs correctly.
Lots of times, guys getting rushed and set something to get it by, hoping to return, then never being able to get back. Then that goes on for 3 years and now your the poor shmuck who is gonna need to make it right.
Anytime you see a receiver jumping, one thing is for sure, you have to see the receiver and column of liquid when everything is calling to see if you may need more refrigerant.