Viessmann VITODENS 050-W Installation And Service Instructions Manual page 62

Troubleshooting
Repairs
(cont.)
Outside temperature sensor
OT-
4 3 2 1
A
C
B
1. Disconnect the leads of outside
temperature sensor B.
200
100
80
60
40
20
10
8
6
-20 -10 0
Temperature in °C
Sensor type: NTC 10 kΩ
2. Check the sensor resistance. Com-
pare with the curve.
62
OT+
10 20 30
3. In the event of severe deviation
replace the sensor.