Baxi Megaflo System HE IE Series Installation & Servicing Instructions Manual page 76

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ensure the gas and electrical supplies are isolated.
18.2 Error Codes
1. If a fault occurs on the boiler an error code may be shown by the facia display.
2. The codes are either two or three digit, preceded by the letter 'E'. For example, code E133 will be displayed by 'E1' alternating with '33'. E20
is shown as 'E' then '20'
E20 and E28 indicate faulty components.
E110 shows overheat of the primary water and E130 overheat of the flue system.
E119 is displayed when the primary water pressure is less than 0.5 bar.
E133 indicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected.
E125 is displayed in either of two situations:-
i) If within 15 seconds of the burner lighting the boiler temperature has not changed by 1°.
ii) If within 10 minutes of the burner lighting the boiler temperature twice exceeds the selected temperature by 30°. In these instances poor primary
circulation is indicated.
3. By turning the selector switch to the 'Reset' position for a minimum of 5 seconds when E110, E130 & E133 are displayed it is possible to
relight the boiler.
4. If this does not have any effect, or the codes are displayed regularly further investigation is required.
page 48
Refer to Section 16.0 "Illustrated Wiring Diagram" for position of terminals and components Central Heating - Follow operational sequence