It sounds like you know where these special "D" codes are as you mentioned it in your post. The default Mori passcode is only 76543210 so the key is to re-enter them if you have a list of them somewhere. Perhaps a call to Mori (or the machine dealer) is in order to get the "D" code list at this point. You are not installing new codes, you are simply restoring existing ones here - they should be able to help...