Pairing mode is activated by short pressing the button. The GREEN LED must be rapidly flashing while the Danfoss Zigbee Repeater is searching for the Danfoss Ally Gateway. If the green LED is not rapidly flashing, then factory reset should be performed:
1. Remove the Zigbee repeater from the power socket
2. Press and hold the button while connecting the Zigbee repeater to power again
3. Hold the button until constant red LED and release the button.
Short press the button should then make green LED rapidly flashing.
Please note that the Danfoss Ally Gateway might need up to 60 seconds to discover the device.