Quick Menu Miscellaneous questions Will any third party sensor work with the CommBox or ResiBox? How long should I program my CommBox to melt snow? Can one AirSense be used with two CommBoxes? Programming Where are the DIP switches located on the COMMBOX-600? What do each of the COMMBOX DIP Switches Mean? Programming your COMMBOX-600 Troubleshooting What Does the HI/LO Error message mean on my COMMBOX? What does COMMBOX error code “SensErr 2” mean? What does COMMBOX error code “SensErr 1” mean? Wiring How many Mats or Amps can I connect to the CommBox? Can I use the Commbox or Resibox with single phase electric? What are the amperage capabilities of each Box at each voltage? Preparing for your project Do I need to provide a transformer to wire in 3-phase? Can I use the Commbox or Resibox with single phase electric? The BOX system can be used with single-phase electric power. You can connect up to 120 Amps on the Resibox and 230 amps on the Commbox. The relay contactors are rated 100-600V.