Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 116

Diagnosis and service scans
Diagnosis
(cont.)
Constant temperature control unit
Service menu:
1. Press OK and å simultaneously for
approx. 4 s.
For explanations of individual scans, see the following table:
Brief scan
0
1
3
4
5
6
7 SNVT con-
figuration
0: Auto
1: Tool
8
9
A Diverter
valve sta-
tus
1: Heating
2: Central
position
3: DHW
heating
b
C
116
"Ü" flashes on the display.
2. Confirm with OK.
3. Select the required scan with V/v.
For example, "A" for "Max. output"
(see following table):
4. Confirm selected scan with OK.
Display
System Software version
scheme Control unit
Adjusted outside temperature
Set boiler water temperature
Common demand temperature
Set cylinder temperature
Number of KM BUS sub-
scribers
Software version
Communication coproces-
sor
Subnet address/system
number
Burner control unit type
0 Max. heating output in %
Boiler coding card (hexadecimal)
Version
Device
Software
version
Program-
ming unit
Number of LON subscrib-
ers
Software version
LON module
Node address
Device type
Version
Burner control unit