DE DIETRICH TWINEO EGC 25 - Manual (Page 27)

Code Cause of
the fault Description Checking / solution
e11 PCU Difference between the flow and
return temperatures too great
Bad connection
Sensor fault
4 Contact the professional who takes care of maintenance of the
appliance
No water circulation
4 Vent the air in the heating system
4
Check the circulation (direction, pump, valves)
4
Check the water pressure
e12 PCU Maximum boiler temperature
exceeded (STB thermostat
maximum)
Bad connection
Sensor fault
4 Contact the professional who takes care of maintenance of the
appliance
No water circulation
4 Vent the air in the heating system
4
Check the circulation (direction, pump, valves)
4
Check the water pressure
e14 PCU 5 burner start-up failures No ignition
4
Contact the professional who takes care of maintenance of the
appliance
Ignition arc, but no flame formation
4
Check that the gas valve is fully opened
4
Contact the professional who takes care of maintenance of the
appliance
Presence of the flame but insufficient ionization (<3 µA)
4
Check that the gas valve is fully opened
4
Contact the professional who takes care of maintenance of the
appliance
e16 PCU Detection of a parasite flame Ionization current present even though there is no flame
Ignition transformer defective
Gas valve defect
The burner remains very hot: CO
2
too high
4 Contact the professional who takes care of maintenance of the
appliance
e17 PCU Internal error on the SU board Bad connection
SU PCB faulty
4
Contact the professional who takes care of maintenance of the
appliance
e34 PCU The fan is not running at the right
speed
Bad connection
Fan defective
4
Contact the professional who takes care of maintenance of the
appliance
e35 PCU Flow and return reversed Bad connection
Sensor fault
4 Contact the professional who takes care of maintenance of the
appliance
Water circulation direction reversed
4 Check the circulation (direction, pump, valves)
e36 PCU The flame went out more than 5
times in 24 hours while the burner
was operating
No ionization current
4 Check that the gas valve is fully opened
4 Contact the professional who takes care of maintenance of the
appliance
EGC 25 6. Troubleshooting
03/12/2013 - 300026082-001-02 26