Troubleshooting
CR 10 H – 6720876740 (2017/08)
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5 Troubleshooting
If a fault cannot be rectified, note down the fault code and sub-code:
▶ Contact the approved contractor or Customer Service.
▶ Advise the type of fault and ID no. of the user interface.
Table 2 ID no. rear of the user interface (to be entered by the installer)
If there is a fault, the display shows alternately the fault code and the 3-digit sub-
code.
In the case of 4-digit sub-codes, initially the first two digits and then the last two
digits are displayed alternately with the fault code (e.g.: A21 ... 10 ... 01 ... A21 ...
10 ... 01 ...).
▶ Select and confirm the required value.
▶ Press and hold the selector until the setting is displayed again.
Closing the service menu Operate
Result
▶ Press and hold the selector until 3 dashes are displayed.
▶ Release the selector.
The current room temperature or ventilation level is displayed,
and the user interface operates with the changed setting.
__ _
Changing the setting (e.g. heating circuit H.C) Operate
Result
°C
°F
°C
°F
°C
°F
°C
°F
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