Viessmann VITODENS 050-W Installation And Service Instructions Manual page 61

Repairs
(cont.)
Checking the flue gas temperature sensor
A
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
Sensor type: NTC 10 kΩ
1. Disconnect leads at flue gas tem-
perature sensor A.
2. Check sensor resistance and com-
pare it to the curve.
3. In the event of severe deviation
replace the sensor.
Troubleshooting
61