Error
code
Description
Probable causes
Checking / solution
e[14
5 burner start-up failures
4
No ignition
4
Check cabling of ignition transformer
4
Check the ionization/ignition electrode
4
Check breakdown to earth
4
Check the condition of the burner set
4
Check the earthing
4
Defective control SU PCB
4
Ignition arc, but no flame
formation
4
Purge the gas supply to remove air
4
Check that the gas valve is fully opened
4
Check the supply pressure
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 control SU PCB
4
Presence of the flame
but insufficient ionization
(<3 µA)
4
Check that the gas valve is fully opened
4
Check the supply pressure
4
Check the ionization/ignition electrode
4
Check the earthing
4
Check the wiring on the ionization/ignition electrode
e[16
False flame signal
4
Ionization current
present when there
should not be a flame
4
Ignition transformer
defective
4
Gas valve defective
4
The burner remains very
hot: CO
2
too high
4
Check the ionization/ignition electrode
4
Check the gas valve and replace if necessary
4
Set the CO
2
e[17
Problem on the gas
valve SU PCB
4
Bad connection
4
Defective SU PCB
4
Check the wiring
4
Inspect the SU PCB and replace it if need be
e[34
Fan fault
4
Bad connection
4
Fan defective
4
Check the wiring
4
Replace the fan if need be
4
Check for adequate draw on the chimney connection
e[35
Flow and return reversed
4
Bad connection
4
Sensor fault
4
Sensor not or badly
connected
4
Water circulation
direction reversed
4
Replace the sensor if necessary
4
Check the circulation (direction, pump, valves)
4
Check that the sensors are operating correctly
4
Check that the sensor has been correctly fitted
e[36
5x Flame loss
4
No ionization current
4
Purge the gas supply to remove air
4
Check that the gas valve is fully opened
4
Check the supply pressure
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 that there is no recirculation of flue gases
e[37
Communication error
with the SU PCB
4
Bad connection
4
Check whether the SU PCB has been correctly fitted
in the connector on PCU PCB
Calenta 25s - 28c - 35s - 40c
8. Troubleshooting
040412 - 7600585-01
87
