Troubleshooting; Anti-Hunting; Messages (Code Type Bxx Or Mxx) - DeDietrich MCA 45 User Manual

7. Troubleshooting

7 Troubleshooting
7.1

Anti-hunting

7.2

Messages (Code type Bxx or Mxx)

Code Messages
B00 BL.PSU ERROR
B01 BL.MAX BOILER
B02 BL.HEATING
SPEED
41
When the boiler is in "Anti-short-cycle" operating mode, the symbol
"?" flashes. This is a normal operating mode. When the restart
temperature is reached, operation will be guaranteed.
In the event 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
This display only concerns boilers with the DIEMATIC
iSystem control panel.
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:
Depending on the control panel, the message display is
different:
Control panel DIEMATIC iSystem: The code and the
4
message are displayed.
Control panel IniControl: Only the code is displayed.
4
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
MCA 45 - 65 - 90 - 115
06/09/2010 - 300024828-001-A