What the manual says
Manufacturer manualReset pressed 5 times within 15 minutes
From this model's manual
Verified against the Ariston Bravo 24 Mffi installation & service manual, page 56.
DIY fix possible
Turn the boiler power off at the fused spur switch (the wall switch).Wait for at least 5 to 10 minutes to allow the internal memory to clear.Turn the power back on and wait for the boiler to initialize without pressing any buttons.
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