Quick Menu Wiring Wiring the DS-9 Controller Programming What is the purpose of the LTC Dip Switch? What does the DEL Dip Switch mean? What does the LD Dip Switch mean? Troubleshooting Why hasn’t my Controller activated my snowmelt system if its snowing? Wiring the DS-9 Controller You can find a short video clip below for wiring the DS-9 or you can find written instructions. For written instructions and wiring diagrams, click here.