BoilerFaultCodesWhat the manual says
Manufacturer manualWith Vitosolic 100
What causes this fault?
This fault occurs when the main boiler loses its connection with the Vitosolic solar control module, essentially causing a breakdown in communication between the two systems. The most common reason is a loose or damaged data cable, though a malfunction within the solar controller itself can also trigger the alert.
This fault is often more noticeable during the summer months when the household relies more heavily on solar energy rather than gas to heat their water.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 68 fault codes on the Vitodens 050-W
Seeing a different code? Every code this model can display, in one place.