Repair starts an individual device Z-Wave route repair process. Refresh seems to ask the hub to ping the device for the latest status and route, and then updates the display. Replace allows you to replace an unresponsive device with a new one of the same type and reuse the network ID
Thanks, Tony. Learning more every day. Still struggling with a number of non-Plus devices from an earlier system. I still wonder whether there is a bug in 2.2.4 or whether I will need to replace the sensors with Plus units to get reliable security monitoring. Hoping to hear back from Support after the holiday.