It is not necessary to clear a script from the COBRA 18R2 as the controller will automatically remove an old script when a new one is loaded, but, there may be some cases where you do want to clear the script memory, these are the instructions for that process.
Step 1. Hold TEST and SYNC simultaneously for 10 seconds. (Both the TEST and SYNC button will blink, and 00 will show on the top 7-segment display when the scripts have cleared.)
Step 2. Restart the controller.
When you restart the controller you will notice that it no longer displays that a script is loaded into memory. To learn more about the start sequence of the 18R2 controller please visit this link.