DeDietrich AFC 30 User Manual page 36

7. Troubleshooting
Code Messages
B04 BL.SMOKE.TEMP
B10 BL.SC.IN.OPEN
B11
B12 BL.SMOKE.PRES
B13 BL.COM PCU-D4
B14 BL.WATER MIS.
B15 BL.GAS PRESS
B16 BL.BAD SU
B17 BL.BAD PSU
B18 BL.BAD PSU
B19 BL.NO CONFIG
B21 BL.COM SU
B22 BL.PARAM.BURNER
B23 BL. VOLTAGE <190V
B25 BL.OUTSIDE.S
B26 BL.DHW. S.
B27 BL.DHW INST
35
Description
The maximum flue gas
temperature has been exceeded.
If this message is generated 5
times in 24 hours, the boiler locks
down in L31.
The BL inlet on the PCU PCB
terminal block is open
The flue gas pressure switch is
open. If this message is generated
5 times in 24 hours, the boiler locks
down in L30.
Communication error with the
SCU PCB
The water pressure is lower than
0.8 bar (0.08 MPa)
Internal fault
Incorrect configuration
The parameters saved on the
PCU PCB are impaired
The PSU integrated in the PCU is
not recognised
The boiler has not been configured The PSU PCB has been changed
Communication error between the
PCU and SU PCBs (Burner control
and safety box)
Wrong burner parameters
Mains voltage too low
The outside temperature sensor
connected to the PCU has been
disconnected
The DHW tank sensor is
disconnected or short circuited
The sensor on the plate exchanger
outlet is disconnected or short
circuited
Checking / solution
Contact the professional who takes care of
4
maintenance of the appliance.
The contact connected to the BL inlet is open
Contact the professional who takes care of
4
maintenance of the appliance.
Parameter error
Contact the professional who takes care of
4
maintenance of the appliance.
Bad connection
Contact the professional who takes care of
4
maintenance of the appliance.
Contact the professional who takes care of
4
maintenance of the appliance.
Bad connection
Contact the professional who takes care of
4
maintenance of the appliance.
SCU PCB not installed in the boiler
Contact the professional who takes care of
4
maintenance of the appliance.
Not enough water in the circuit
Top up the installation with water
4
Contact the professional who takes care of
4
maintenance of the appliance.
Contact the professional who takes care of
4
maintenance of the appliance.
Parameter error on the PCU PCB
Contact the professional who takes care of
4
maintenance of the appliance.
Wrong PSU for this boiler
Contact the professional who takes care of
4
maintenance of the appliance.
Contact the professional who takes care of
4
maintenance of the appliance.
Bad connection
Contact the professional who takes care of
4
maintenance of the appliance.
Contact the professional who takes care of
4
maintenance of the appliance.
Contact the professional who takes care of
4
maintenance of the appliance.
Switch the boiler off and switch back on.
4
Contact the professional who takes care of
4
maintenance of the appliance
Contact the professional who takes care of
4
maintenance of the appliance
AFC 18 - AFC 24 - AFC 30
15/07/2015 - 300026440-05