Viessmann Vitotronic 200 Installation And Service Instructions Manual page 110

Components
Components from the parts list
Contact temperature sensor and immersion temperature
sensor
For capturing the flow or return temperature
Connection
See chapter "Connecting sensors".
Check sensor
Specification
Protection
IP 32
Permiss. ambient
temperature
during opera- 0 to + 100 °C
tion
during storage
and transport 20 to + 70 °C
110
(cont.)
1. Pull plug ? or aJ.
2. Check the sensor resistance
across plug terminals "1" and "2".
3. Compare the measurement with the
actual temperature displayed (for
scanning, see chapter "tempera-
tures, boiler coding card and brief
scans").
Check the installation and, in case
of severe deviation, replace the
sensor.