Troubleshooting; Anti-Hunting; Messages (Code Type Bxx Or Mxx) - DeDietrich MCA 15 User Manual

6. Troubleshooting

6 Troubleshooting
6.1

Anti-hunting

6.2

Messages (Code type Bxx or Mxx)

Code Messages
B00 BL.PSU ERROR
B01 BL.MAX BOILER
B02 BL.HEATING
SPEED
BL.DT OUTL RET. Maximum difference between the
B07
31
When the boiler is in Anti-short-cycle operating mode, the symbol ?
flashes.
1. Press the "?" key.
In the case of failure, the control panel displays a message and a
corresponding code.
1. Make a note of the code displayed.
2. Switch the boiler off and switch back on.
3. If the code is displayed again, correct the problem by following the
Description
The PSU PCB is incorrectly
configured
Maximum flow temperature
exceeded
The increase in flow temperature
has exceeded its maximum limit
flow and return temperature
exceeded
The message Operation assured when the restart temperature
will be reached is displayed. When the restart temperature is
reached, operation will be guaranteed.
This message is not an error message but an item of
information.
The code is important for the correct and rapid diagnosis of the
type of failure and for any technical assistance that may be
needed.
The boiler starts up again automatically when the reason for the
blocking has been removed.
instructions in the table below:
Checking / solution
Parameter error on the PSU PCB
Contact the professional who takes care of maintenance of
4
the appliance
The water flow in the installation is insufficient
Check the circulation (direction, pump, valves)
4
The water flow in the installation is insufficient
Check the circulation (direction, pump, valves)
4
Check the water pressure
4
Sensor error
Contact the professional who takes care of maintenance of
4
the appliance
The water flow in the installation is insufficient
Check the circulation (direction, pump, valves)
4
Check the water pressure
4
Sensor error
Contact the professional who takes care of maintenance of
4
the appliance
MCA 15 - MCA 25 MCA 25/28 MI
23/08/2011 - 300024159-001-B