so i am a certified tech and was working on a 10-15 year old payne unit suction pressure was 40 so i added r-22. 8 oz. vapor. unit taking refrigeranty at a very slow rate so i added 8 more oz. in a liquid 4 at a time slowly. this got the suction pressure to about 75 and all of a sudden compressor makes intermittent wierd sounds sending the pressure up and down between 75 and 120. then compressor just stopped working. disconnected power and am hoping i just flooded it and in the morning it will be fine. what do you think???