I have an emerald spa "cygnus series" model 2005 DS-4. I bought a new Balboa 8 button topside control panel for it and the temp control is stuck on 104. There is a "locked" icon showing on the temp panel. How do I unlocked it? Is there an owners manual I can obtain for this model? We inherited the hottub with the house and there is no information with it. Any help would be greatly appreciated.