What the manual says
Manufacturer manualminimum output in heating mode (Chimney sweep function)
From this model's manual
Verified against the Biasi Rinnova Adaptive Combi System installation & service manual.
DIY fix possible
Wait for the chimney sweep test to finish automatically (usually takes 15 minutes)Press the 'Reset' or 'Mode' button to manually exit the test modeTurn the power off and back on again if the code persists
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