Code
Cause of
the fault
Description
Checking / solution
e03
PCU
The boiler flow sensor is on an
open circuit
Bad connection
Sensor fault
4
Contact the professional who takes care of maintenance of the
appliance
e04
PCU
Boiler temp too low
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
e05
PCU
Boiler temperature too high
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
e06
PCU
The return temperature sensor has
short-circuited
Bad connection
Sensor fault
4
Contact the professional who takes care of maintenance of the
appliance
e07
PCU
The return temperature sensor is
on an open circuit
Bad connection
Sensor fault
4
Contact the professional who takes care of maintenance of the
appliance
e08
PCU
Return temperature too low
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
e09
PCU
Return temperature too high
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
e10
PCU
Difference between the flow and
return temperatures insufficient
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
EGC 25
7. Troubleshooting
09/02/2016 - 300026082-001-05
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