Dip switch number 7 on the Cal Spa 2200/2300 R1D board is used for the topside control panel and logic. If it is placed in the wrong connector, it will cause the spa to continuously display the SF error code. For Watkins spas, pressing the plus buttons together for 2 seconds locks/unlocks the temperature controls, while pressing the minus buttons together locks/unlocks the entire spa. The document provides troubleshooting information for Cal Spa and Watkins spa controls.