DE DIETRICH INNOVENS MCA 35 - Manual (Page 32)

6 Troubleshooting
6.1 Anti-hunting
When the boiler is in Anti-short-cycle operating mode, the symbol ?
flashes.
1. Press the "?" key.
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.
6.2 Messages (Code type Bxx or Mxx)
In the case 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:
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
B07 BL.DT OUTL RET. Maximum difference between the
flow and return temperature
exceeded
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
6. Troubleshooting MCA 35
31 24/08/2011 - 300024162-001-B