There is a reset sequence, which I cannot remember off the top of my head. You might find this in the forum, otherwise email me and I'll look up my docos. Failing this if Your hc-300 is a zigbee pro radio and you have embernet keypad, you need an embernet radio to upgrade the keypad to zigbee pro. Once you upgrade a controller to zigbee pro, ie 1.8.2 or higher, I don't think you can go backwards to an embernet radio, thus it becomes pain to upgrade these devices. Of you are in this boat your options will be: 1. Sell to a 1.7.4 user 2. Buy a hc-200 or 300 on 1.7.4 to get an embernet radio to do the upgrade 3. See a dealer, some might have separate radio that plugs into a USB port to do such upgrades.