BoilerFaultCodesWhat the manual says
Manufacturer manualThis control signals that the safety pressure switch on the primary circuit has not sensed a pressure of at least 1 bar within 40 seconds of the activation of the circulation pump; the circulation pump comes to a halt and the red L.E.D.“J”illuminates.
From this model's manual
Verified against the Ariston/Ariston Genus 27 Rffi System installation & service manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 19 fault codes on the Genus 27
Seeing a different code? Every code this model can display, in one place.