What the manual says
Manufacturer manualSelf test: Once every 24 hours, the boiler controller tests the connected sensors.
From this model's manual
Verified against the Daikin Ekomb 22 Combi installation & service manual, page 47.
DIY fix possible
Wait for a few minutes as this is a normal automated process and the message should clear itself.If the code stays on the screen, try resetting the boiler using the power button.If the code persists after a reset, contact a technician to check the sensor connections.
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