Bosch CR 10 Manual page 11

A61 3091 ...
... 3098
A68
A21 1001
A22 1001
...
A28
A61 1081
... ...
A68 1088
A61 3061
... ...
A68 3068
Fill -
Table 3 Fault code and sub-code for the contractor
For further information, see the service manual if necessary
6720830560 (2015/06)
Possible cause and
assistance from the contractor
Room temperature sensor of the CR 10 defective (A61/
3091: Heating circuit 1, ..., A68/3098: Heating circuit 8).
▶ Replace the CR 10.
CR 10 in Heating circuit 1 incorrectly configured.
▶ If a higher-level user interface (e.g. CW 400) is installed,
set A.1 = Fb (remote control).
▶ If a zone module is installed and recognized, set A.1 = SC
(zone controller).
▶ If no higher-level user interface and only one heating circuit
is installed, set A.1 = CO (controller).
BUS signal from the higher-level user interface for remote
heating is missing (A22: Heating circuit 2, ..., A28: Heating
circuit 8).
▶ Install the higher-level user interface (e.g. CW 400).
▶ Establish the BUS connection.
CR 10 incorrectly configured (A61/1081: Heating circuit 1, ...,
A68/1088: Heating circuit 8).
▶ Set A.1 = Fb (remote control).
CR 10 incorrectly configured (A61/3061: Heating circuit 1, ...,
A68/3068: Heating circuit 8).
▶ For assistance, see Fault code A21.
Water pressure in the heating system is too low.
▶ Top up the heating water (even without a contractor,
technical documentation about the heat source).
Eliminating faults | 11
CR 10