- The 'channel interrupted' symbol may indicate that the electrodes have no proper skin contact and/or have become detached from the skin. Make sure that the electrodes are properly attached to the skin
- The 'channel interrupted' symbol may indicate that one or several of the TENS units have not been properly placed on the electrodes. Check if the TENS units are placed on the electrodes correctly
- The electrodes have lost their adhesive power because they are dirty or because they have been used for a long time. You can try to clean the electrodes (see chapter 'Cleaning'). If this does not help, replace the electrodes