Troubleshooting; Anti-Short Cycle; Messages (Bxx Or Mxx-Type Codes); List Of Bxx Or Mxx Type Error Codes - DeDietrich AFC 18 User Manual

8 Troubleshooting

8 Troubleshooting
8.1

Anti-short cycle

8.2

Messages (Bxx or Mxx-type codes)

Tab.14
Code Messages
B00 BL.CRC.PSU
B01 BL.BOILER MAX
B02 BL.HEATING SPEED
B03 BL.FLAME LOS
B04 BL.SMOKE.TEMP
30 AFC
When the boiler is in the anti-short cycle operating mode, the
flashes.
1. Press the "?" key.
The Operation assured when the restart temperature will be reached
message is displayed.
Important
This message is not an error message but an item of information.
If an error occurs, the control panel displays a message and a
corresponding code.
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the type of
malfunction and for any technical assistance that may be needed.
2. Switch the boiler off and switch it back on.
The boiler starts up again automatically when the reason for the
disruption has been eradicated.
3. If the code is displayed again, resolve the problem by following the
instructions in the table below.
8.2.1

List of Bxx or Mxx type error codes

Description
The PSU integrated into the
PCU is incorrectly configured
Maximum flow temperature
exceeded
The increase in flow tempera­
ture has exceeded its maxi­
mum limit.
Flame disappeared during op­
eration
The maximum flue gas tem­
perature has been exceeded.
If this message is generated
five times in 24 hours, the
boiler locks down in L31.
Checking / solution
Parameter error on the PSU PCB.
Contact the professional who handles mainte­
nance of the appliance.
The water flow rate in the installation is insuffi­
cient
Contact the professional who handles mainte­
nance of the appliance.
The water flow rate in the installation is insuffi­
cient
Contact the professional who handles mainte­
nance of the appliance.
Sensor error
Contact the professional who handles the
maintenance for the appliance
No flame detection.
Air present in the oil circuit.
Contact the professional who handles the
maintenance for the appliance
Contact the professional who handles mainte­
nance of the appliance.
300026440 - v06 - 07082018
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