Viessmann Vitodens 200 Service Manual page 37

Further details regarding the individual steps
Example 2: Modifying the reduced
room temperature from 5 °C to 14 °C
A Boiler water or flow temperature
in °C
B Outside temperature in °C
C Set room temperature in °C
D Heating circuit pump OFF
E Heating circuit pump ON
Instructing the system user
The system installer must hand the operating instructions to the system user
and instruct them in the operation of the system.
Scanning and resetting the "Maintenance" display
The red fault indicator flashes when the limits set via coding address 21 and 23
have been reached. As regards the operating interface display:
&
for constant temperature control units, the hours run (subject to setting) or the
given time interval and the clock symbol will flash,
&
for weather-compensated control units "Maintenance" flashes.
Note
Set code 24:1 and then code 24:0, if maintenance is implemented before it is
displayed; the set maintenance parameters for hours run and intervals are then
reset to 0.
Initial start-up, inspection, maintenance
(cont.)
2. Call up the set night temperature
with E.
3. Change this value with a and b.
4. Confirm the set value with d.
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