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Evotouch controller does not recover from power failure

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Yesterday I inadvertenly let the batteries on my (monochrome) controller go flat. After being put on charge it appeared to have recovered - in that the programmed times and temperatures are OK and it displays the actual room temperatures correctly. However the HR80 radiator valves no longer respond to it and during the night they all defaulted to 20C and the heating came on unexpectedly.

Some valves display the comms icon, some do not, it makes no difference. The Economy button on the controller reduces some zones by 3 degrees but does not change them all.

Is there a way to reset the system short of uninstalling and reinstalling all the components?

TIA for any help!

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