To pair a Nuki Bridge with your Smart Lock (after the initial Bridge setup), press and hold the button on both your Smart Lock and your Bridge for 5 seconds to connect them with each other. The devices are in pairing mode when the lights are permanently glowing. The pairing is complete when the Smart Lock and the Bridge stop glowing and the Bridge LED is flashing for 3 seconds afterwards.
If the pairing between Smart Lock and Bridge did not work, the devices automatically leave the pairing mode after 60 seconds. If the Bridge LED is not flashing for 3 seconds after the pairing, the pairing was not successfull. Please try it again and make sure that the Bridge is inserted into a power socket within max. 5 meters distance to the Smart Lock. In case of a wider distance the Bluetooth connection might not work.
To pair your Smart Lock with your Bridge, the "Bluetooth pairing" option of your Smart Lock has to be enabled. To check this setting, tap on the desired Smart Lock in the Nuki app and enter the lock settings. Then go to "Manage Smart Lock" and enable the option "Bluetooth pairing" to allow pairing with new devices.
After pairing the Smart Lock with the Bridge it may take a few minutes until the Smart Lock recognizes that it is connected to a Bridge now. To test whether the pairing has worked, wait a few minutes and send a locking command to your Smart Lock with the Nuki app (in Bluetooth reach). Then disable Bluetooth on your smartphone and send a locking command again. This time the locking command should be forwarded to the Smart Lock via the Bridge. If the Smart Lock performs the locking action, the pairing was successfull and you can now control your Smart Lock from afar.
If after a few minutes still no locking commands can be send to your Smart Lock via the Bridge, close the Nuki app and open it again to force a status update. If this does not help, check the connection status of your Smart Lock with the Nuki app. To check the connection status of your Smart Lock, tap on the desired Smart Lock in the Nuki app and enter the lock settings. Then go to "Connection status". If there is no Bridge connection displayed, the pairing of your Smart Lock and the Bridge did not work. Try to pair your Smart Lock with your Bridge again.