102
Check flow temperature sensor
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. 65
Sensor type: NTC 10 k
Ω
1.
Disconnect plug
?
(flow temperature sensor).
2.
Check the sensor resistance and compare it to the
curve.
In the event of severe deviation replace the sensor.
Checking the Vitotronic 200-H (accessories)
The Vitotronic 200-H is connected to the control unit
via the LON cable. To test the connection, carry out a
subscriber check at the boiler control unit (see
page 53).
Troubleshooting
Maintenance
(cont.)
5778741
Diagnosis