RNS510 time only showing

[Mowbotman]

When ignition on only the time shows , tried turning on and of with bottom left button and still same, when ignition off , press bottom left button and all it does again is show time and cannot get any further, has been working fine till this afternoon

 

[WelshGas]

When ignition on only the time shows , tried turning on and of with bottom left button and still same, when ignition off , press bottom left button and all it does again is show time and cannot get any further, has been working fine till this afternoon

You could try this but I fear it may not work.