Network repair is a helpful feature that allows you to refresh your mesh network's connections. You can repair the network using either the SmartThings Classic app or the newer SmartThings app. See the steps below depending on which app you're using:
If using SmartThings Classic, first disable the Health Check before proceeding with Network Repair:
And here's how to perform Network Repair:
Before sending any commands to your dimmer, wait until you see the "Z-Wave Network Repair finished" message - this can take up to 15 minutes. Once repair is completed, try including the device back into your network.
If using the newer SmartThings app, here's how to repair the network:
As noted above, wait until you see the "Z-Wave Network Repair finished" message before sending any commands to your Double Switch. Once repair is completed, try including the device back into your network.
If Network Repair doesn't help, simply try excluding and re-including the RGBW Dimmer. It's possible that the communication route between SmartThings and the device wasn't established correctly the first time. Exclusion can help the hub find the best route to the device.
If you have a Z-Wave signal repeater available, try installing it between the dimmer and hub and then perform Network Repair once more once it's been installed. A Z-Wave signal repeater is any Z-Wave device that doesn't relay on battery power, so a smart plug, switch, relay, or even dedicated repeater. If it's a range issue or an interference issue, the repeater should help the hub stabilize communication with the dimmer.
Another important set-up detail is the material of your switch box. Metal switch boxes, rather than plastic, can shorten range and interrupt Z-Wave signals. If your device is inside a metal box this may be why it keeps going offline. If possible, try adding a Z-Wave signal repeater between the device and hub, or try bringing your hub closer to it to see if it keeps dropping offline.
If you've tried all of the above and are still seeing the same issue, please don't hesitate to reach out!