...
If the problem persists see the article: /wiki/spaces/ICS/pages/3048032 How to - Genius Position the Genius Smart Plugs.
E9 error
The Genius Radiator Valve shows the 'E9' 'Valve closing error' if it tries to close the flow of water through the radiator a number of times and fails. Unmount and remount the Genius Radiator Valve to see if this fixes the problem.
...
If the problem persists see the article: /wiki/spaces/ICS/pages/3048032 How to - Genius Position the Genius Smart Plugs.