pulling it out and recharging the the correct thing to do but the bottom line is it might work until you can get back to it and get them to comvert it to something other than 12. Lets get real the 401A and 12 are very close when it comes to p/t. This ain't rocket science and we have all made mistakes in our lives. Rookie or not. Look at the critical temps - evap / discharge etc and if everything is close you are probably fine. My .02 DaleP
I'm only working because it's not duck season!!!!!!!!!!