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Baxi Quinta Ace fault codes

35 codes from the Baxi manual for the Quinta Ace appliance. Pick one for what it means, the likely causes and where to start.

CodeWhat it means
A.00.34TOutdoor missing
A.01.23Poor combustion
E.00.04TReturn open
E.00.05TReturn closed
E.00.06TReturn missing
E.00.08THeat ex open
E.00.09THeat ex closed
E.00.20TFlue gas open
E.00.21TFlue gas closed
E.01.045x flame loss error
E.01.12Return higher flow
E.01.24Combustion error
E.02.13Blocking input
E.04.01TFlow closed
E.04.04TFlue closed
E.04.05TFlue open
E.04.06Max flue temp
E.04.08Safety input
E.04.10Unsuccessful start
E.04.12False flame
E.04.13Fan
E.04.15FlueGas pipe blocked
H.00.81RoomTempMissing
H.01.05Max delta TF-TR
H.01.06Max delta TH-TF
H.01.07Max delta TH-TR
H.01.08CH temp grad level3
H.01.09Gas pressure switch
H.01.13Max THeat ex
H.01.14Max tflow
H.01.15Max tflue gas
H.01.21Dhw temp GradLevel3
H.01.26Gas pressure max
H.02.12Release signal
H.03.02Flame loss detected