Bosch CR 10, Manual

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Eliminating faults | 11
6720830560 (2015/06) CR 10
Table 3 Fault code and sub-code for the contractor
For further information, see the service manual if necessary
fault code sub-code
Possible cause and
assistance from the contractor
A61
...
A68 3091 ...
3098 Room temperature sensor of the CR 10 defective (A61/
3091: Heating circuit 1, ..., A68/3098: Heating circuit 8).
▶ Replace the CR 10.
A21 1001 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).
A22
...
A28 1001 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.
A61
...
A68 1081
...
1088 CR 10 incorrectly configured (A61/1081: Heating circuit 1, ...,
A68/1088: Heating circuit 8).
▶ Set A.1 = Fb (remote control).
A61
...
A68 3061
...
3068 CR 10 incorrectly configured (A61/3061: Heating circuit 1, ...,
A68/3068: Heating circuit 8).
▶ For assistance, see Fault code A21.
Fill - Water pressure in the heating system is too low.
▶ Top up the heating water (even without a contractor,
Æ
technical documentation about the heat source).