Baxi MainEco Combi 24 Installation And Service Manual page 70

9. Troubleshooting
Lock out (Error code - e[KK)
Error Description
code
Difference between the
e[10
flow and return
e[11
temperatures too great
Temperature of heat
exchanger above
e[12
normal range (high-limit
thermostat STB)
5 burner start-up
e[14
failures
False flame signal
e[16
Problem on the gas
e[17
valve
Fan fault
e[34
68
Probable causes
No circulation
4
Sensor not or badly
4
connected
Sensor fault
4
No circulation
4
Bad connection
4
Sensor not or badly
4
connected
Sensor fault
4
No ignition
4
Ignition arc, but no flame
4
formation
Presence of the flame but
4
insufficient ionization (<1
µA)
Short-term fluctuations of
4
the mains
Ionization current present
4
even though there is no
flame
The burner remains very
4
hot: CO too high
2
Defective gas/air unit
4
Defective gas/air unit
4
External draught over the
4
boiler
Defective gas/air unit
4
Baxi MainEco Combi and System 24 - 28 - 35 / 18 - 24
Checking / solution
Vent the air in the heating system
4
Check the water pressure
4
Check the wiring
4
Check the circulation (direction, pump, valves)
4
Check the cleanliness of the heat exchanger
4
Check that the sensors are operating correctly
4
Check that the sensor has been correctly fitted
4
Replace the sensor if necessary
4
Vent the air in the heating system
4
Check the water pressure
4
Check the wiring
4
Check the circulation (direction, pump, valves)
4
Check the cleanliness of the heat exchanger
4
Check that the sensors are operating correctly
4
Check that the sensor has been correctly fitted
4
Replace the sensor if necessary
4
Check cabling of ignition transformer
4
Replace the ionization/ignition electrode
4
Check breakdown to earth
4
Check the condition of the burner set
4
Check the earthing
4
Defective gas/air unit
4
Check that the gas valve is fully opened
4
Check the supply pressure
4
Purge the gas supply to remove air
4
Check the operation and setting of the gas valve
4
unit
Check that the air inlet and flue gas discharge flues
4
are not blocked
Check the wiring on the gas valve unit
4
Defective gas/air unit
4
Check that the gas valve is fully opened
4
Check the supply pressure
4
Replace the ionization/ignition electrode
4
Check the earthing
4
Check the wiring on the ionization/ignition electrode
4
Press the J key for 5 seconds
4
Replace the ionization/ignition electrode
4
Set the CO
4
2
Check the gas/air unit and replace it if necessary
4
Replace the gas/air unit
4
Check for adequate draw on the chimney
4
connection
Check the gas/air unit and replace it if necessary
4
02092014 - 7619497-02