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6.4.8 Failure mode (blinking 'code' display)
Only for the heating contractor.
Malfunctions of the boiler control occurring during opera-
tion are shown on the read-out displays (see failure
table in chapter 11). The latest failure is stored in the mi-
croprocessor memory and can be read at service level,
code C 1 2 (see para. 6.4.9).
- Press the 'mode'-key until the digit 1 (blinking)
appears in the 'code'-display.
- Press the 'step'-key for the required code.
Code
Description
1
3 7
Display of failure code (chapter 11)
2
0 3
Operating mode during failure
(para. 6.4.2)
3
5 3
Flow temperature during failure
4
4 0
Return temperature during failure
5
6 0
D.H.W. temperature during failure
6
1 0
Outdoor temperature during failure
Example:
The return temperature sensor has failed during central
heating operation at a flow temperature of 53°C, a return
temperature of 40°C, a D.H.W. temperature of 60°C and
an outdoor temperature of 10°C.
6.4.9 Service code
Only for the heating contractor.
To avoid incorrect settings several operation levels have
protection codes. For service purposes you can program
code C 1 2 .
- Press the 'mode'- and 'step'-keys simultaneously and
the 'code'-display now shows C .
- Holding both keys pressed, set the temperature dis-
play to 1 2 , using the ' '- and ' '-keys.
⇑
- Keep both keys pressed and press the 'store'-key.
The temperature display is blinking to acknowledge
your access to the service setting.
⇑
- Press the 'store'-key to store the service code (the
temperature display will blink twice for acknowledge-
ment).
- Release the 'mode' and 'step' keys.
You are in the service mode and are able to change set-
tings and to read out values.
After using the service code you have to delete the ser-
vice code by pressing the 'reset'-key once or after 10
minutes when no further alterations have been made the
service code will delete automatically.
15
⇑
⇑ ⇑
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