What the manual says
Manufacturer manualVenting the appliance
Shared across the Ultracom 2 SXI range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Wait for the automated venting cycle to finish completely.Check your system pressure gauge to ensure it sits between 1.0 and 1.5 bar.Bleed your radiators if necessary and top up the pressure again.
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Related fault codes
All 75 fault codes on the Ultracom 2 SXI
Seeing a different code? Every code this model can display, in one place.