DE DIETRICH MODULENS AGC 15, AGC 25, AGC 35 - Manual (Page 32)

3. Press the ? key. Follow the instructions displayed to solve the
problem.
4. Consult the meaning of the codes in the table below:
Code Faults Cause
of the
fault Description Checking / solution
L00 PSU FAIL PCU PSU PCB not connected Bad connection
PSU PCB faulty
4
Contact the professional who takes care of
maintenance of the appliance
L01 PSU PARAM FAIL PCU The safety parameters are incorrect Bad connection
PSU PCB faulty
4 Contact the professional who takes care of
maintenance of the appliance
L02 DEF.OUTLET S. PCU The boiler flow sensor has short-
circuited
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
L03 DEF.OUTLET S. 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
L04 DEF.OUTLET S. 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
L05 STB OUTLET 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
L06 BACK S.FAILURE PCU The return temperature sensor has
short-circuited
Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
bar
1
1
2
2
D
STD
J I
E
0 2 4 6 8 10 12 14 16 18 22 24 20
# F AUTO % $
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:  !
SUNDAY 11:45
TEMP. : 68°
PCU COM.FAIL D27
C002302-D-04
6. Troubleshooting AGC 10/15 AGC 15 AGC 25 AGC 35
31 03/12/2013 - 300026080-001-03