Viessmann Vitodens 200, Service Instructions Manual

Page: 54 / 116

54
Control unit for constant temperature mode
Test settingsĂ"T
Ă
1" and "T
Ă
2"
T
Ă
1Ăć Heating mode with lower rated
output
T
Ă
2Ăć Heating mode with maximum
set output
Please note:
In test positionĂ"T
Ă
2", the fault
memory will also be displayed.
Changing parameters in service positionsĂ"S
Ă
1" to "S
Ă
7"
Changing parameters in service positionsĂ"S
Ă
1" to "S
Ă
7" influences the control
unit and system parameters.
The following steps for changing parameters apply to all service positions.
1. Select the service position on the
heating program selector switch.
The display shows:Ă" BBĆBĆ "
The current parameter will be
displayed after approx. 2Ăsec.
2. Turn rotary selectorĂ" w " fully
clockwise.
The maximum value flashes in the
display.
Please note:
If rotary selectorĂ" w " is positioned to
the right of the central position, turn it
first anticlockwise beyond the centre.
3. Turn rotary selectorĂ" w " fully
anticlockwise.
The minimum value flashes in the
display.
4. Set the required value with rotary
selectorĂ" w ".
5. Set the heating program selector
switch to another position.
The value is now saved.
5692Ă485
G
B
T2
T1
S1
S3 S2 S4
S6
S5
S7
T2
T1
S1
S3 S2 S4
S6
S5
S7
T2
T1
S1
S3 S2 S4
S6
S5
S7
+
-
50
+
-
50