Baxi Main Combi Eco Installation & Service Instructions Manual page 51

Refer to Section 16.0 "Illustrated Wiring Diagram" for position of terminals and components
Central Heating - Follow operational sequence (do
Turn selector switch to
The display illuminates
YES
Error 110 flashing
Error 130 flashing
Error 133 flashing
NO
Error 20, 28 or 50 flashing
NO
Error 119 flashing
NO
Turn Central Heating
thermostat to Maximum.
Pump runs
YES
3-way valve is open to Central
Heating circuit
YES
Error 125 flashing
NO
Fan runs
YES
Fan runs at correct speed
YES
Spark at ignition electrodes for
up to 5 seconds and for 3
attempts
YES
NO
Burner lights
YES
Burner output modulates to
maintain the temperature set
YES
Burner goes out
© Baxi Heating UK Ltd 2011
NO
Go to section 'A'
YES Turn the selector switch to
reset position for 5 seconds
YES
Go to section 'E'
YES
Go to section 'C'
NO
Ensure all controls (and
NO
integral clock if fitted) are
calling for heat
NO
Go to section 'K'
Ensure that primary
YES
circulation is OK & that
there is no blockage
NO Error 160 flashing
Go to section 'D'
NO
Error 160 flashing
Go to section 'L'
NO
Error 133 flashing
Go to section 'F'
YES
Burner does not stay alights
after 5 seconds
Check the Central Heating
NO
NTC sensor
Go to section 'E'
YES
Fan stops after 10 seconds
18.0 Fault Finding
If the error 110 is still flashing.
YES
Go to section 'J'
Ensure controls are set to
demand and verify the
contacts are closed
YES
Go to section 'B'
Go to section 'H'
YES
Turn the selector switch to
reset
YES
Error 133 flashing
Go to section 'I'
Pump continues to run for 3
YES
minutes
(room thermostat open)
YES
Operation sequence
successful
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