In your post you state that you are having an issue with your MD1220 but the Picture is showing an MD3220? I am guessing that you missed typed MD1220 & it should be MD3220? When you installed your MD3220 did u follow the Deployment Guide for setting up the management? Here is the guide if you need it. http://downloads.dell.com/manuals/common/powervault-md3200_deployment%20guide_en-us.pdf
Also when you lose connection to your MD3220 & you get it back are there any error listed in the Recovery guru?
Please let us know if you have any other questions.