Going off the attached snip from the 210 air conditioning diagnostic manual, I've got 7.8V to the compressor clutch coil with defront ON when I should have 11-14V (i.e., battery voltage). Seems to me it's trying to activate the coil right now so I don't think it would do any better with a recharged system.
I didn't repeat the test with the EC button ON, though. I should do that.
I could also just force 12V to the coil and see if it pulls in or not.
Also, re: version codes, I found
this post on another forum which plainly states "If you car has aux fans in the front, the P1 setting should be 08." My car has aux fans so I just changed P1 from 40 to 08 but they still don't turn at all when forced to run (#20 = 21.1).