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