Technical guidance on maintaining a sitting car. A/C should be activated once a month even in winter to maintain proper lubrication. Presumably the same applies to your home A/C.
clublexus.com/forums/attachm…
https://www.clublexus.com/forums/attachments/sc430-2nd-gen-2001-2010/478691d1567187388-resource-materials-2002-2010-sc430-technical-service-bulletins-tsbs-l-sb-0018-09-long-term-vehicle-storage-guidelines.pdf
@SwiftOnSecurity It's not quite as bad with home ACs due to their different construction compared to the ones in cars. Definitely worth powering on now and again, but probably only needs doing once every 2-3 months instead of monthly.
Do you mean that the home ones have axes vertically and the car ones have them horizontally? (I'm not sure what's "downward" and "sideways" in this context.)