77
10
1
10
30
50
70
90
110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance
in kΩ
Fig. 38
Sensor type: NTC 10 k
Ω
2.
Measure the resistance of both sensors and com-
pare each with the curve.
3.
In the event of severe deviation replace the sensor.
Checking the flue gas temperature sensor
Note
The flue gas temperature sensor is a dual sensor.
The flue gas temperature sensor locks out the boiler if
the permissible flue gas temperature is exceeded.
After the flue system has cooled down, press reset
button
R
to cancel the lock.
Maintenance
Checking the boiler water temperature sensor
(cont.)
5839829
Maintenance
