How can I find out if my radio valve has a good radio connection to the controller?

To check the radio connection, please go to settings and then choose the Valve section. You will find a list of all the Valves you have connected to your Controller. Click on the Valve you would like to check the conncetion of. 

You will see several information on the Valve such as battery status, serial number etc., and as well the quality of the radio connection in percent.