Every time after the thermostat is powered on, the installation state will be activated ([F11] interface), and it is suggested that the thermostat should be installed on the valve within 5 minutes, after the installation is complete, press the key three times successively to carry out valve calibration, or proceed with networking in accordance with the operation manual, and then carry out valve calibration after the networking is complete. *Reminder: if installation is not complete within 10 min after power-on, please first remove the battery, then put the battery back, and power on for installation.