7 Troubleshooting
7.1 Anti-hunting
This display only concerns boilers with the DIEMATIC
iSystem control panel.
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.
7.2 Messages (Code type Bxx or Mxx)
In the event of failure, 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 failure and for any technical assistance that may be
needed.
2. Switch the boiler off and switch back on.
The boiler starts up again automatically when the reason for the
blocking has been removed.
3. If the code is displayed again, correct the problem by following the
instructions in the table below:
Depending on the control panel, the message display is
different:
4 Control panel DIEMATIC iSystem: The code and the
message are displayed.
4 Control panel IniControl: Only the code is displayed.
Code Messages Description Checking / solution
B00 BL.PSU ERROR
The PSU PCB is incorrectly
configured
Parameter error on the PSU PCB
4 Contact the professional who takes care of maintenance of
the appliance
B01 BL.MAX BOILER
Maximum flow temperature
exceeded
The water flow in the installation is insufficient
4 Check the circulation (direction, pump, valves)
B02 BL.HEATING
SPEED
The increase in flow temperature
has exceeded its maximum limit
The water flow in the installation is insufficient
4 Check the circulation (direction, pump, valves)
4 Check the water pressure
Sensor error
4 Contact the professional who takes care of maintenance of
the appliance
7. Troubleshooting MCA 45 - 65 - 90 - 115
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06/09/2010 - 300024828-001-A
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