How to set the compressor cut-off temperature on a Carrier heat pump?

First post, so apologies if I breach any protocols.

I have a Carrier 5ton system with the following equipment installed in 2013. I believe the heat pump has a single stage compressor.
- Carrier heat pump 25HCC560A300
- Carrier Air handler: FV4CNB006 with 20KW heat strips
- Nest learning thermostat (I know, not the forum's favorite)

Air handler is installed in the attic with a relatively long run to the outside unit (50+ feet).
I set the indoor heat to 68F day, 64F night.

The Nest allows me to set the compressor cutout temperature and I have it set to 26F. Recently, I had a tech check the refrigerant pressure and found it to be spot on. He called Carrier tech support and they told him that the compressor cutoff temperature should be set to a minimum of 32F (the highest the Nest will allow).

The heat pump certainly struggles at temperatures below 32, but it still seems to be doing something. However, I am not sure whether I should change the cutoff temperature based on what the Carrier tech said.

Any suggestions? With 20KW heat strips electricity use is obviously much higher when aux heat kicks in and I would like to use the heat pump as much as possible, but still within its intended range.

Thanks in advance!

source https://hvac-talk.com/vbb/threads/2235710-How-to-set-the-compressor-cut-off-temperature-on-a-Carrier-heat-pump?goto=newpost