128
Check sensors
Flue gas temperature sensor
Temperature in °C
0
100
0.75
1.25
1.75
Resistance
in kΩ
A
50
150
200
250
Fig. 70
A
Data point shown: Resistance of 1.1 k
Ω
at a tem-
perature of 25 °C
Further sensors
Temperature in °C
Resistance
in kΩ
40
30
20
10
0
-10
-20
-30
1.15
1.10
1.05
1.00
0.95
0.90
0.85
1.20
50
Fig. 71
1.
Pull out corresponding plug.
2.
Check the sensor resistance at the plug.
3.
Compare the result with the actual temperature (for
scanning, see chapter "Diagnosis").
In the case of severe deviation, check sensor
installation and replace the sensor if necessary.
Lambda probe
For measuring the residual oxygen content in the flue
gas.
Check Lambda probe
1.
Check the Lambda probe for dirt and damage. See
page 77.
2.
Check the connecting cable for damage.
Maintenance
Sensors
(cont.)
5679249
Maintenance
