Checking The Vitotronic 200-H (Accessories) - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Repairs
(cont.)
Check flow temperature sensor
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50
Temperature in °C
Fig. 57 Sensor type: NTC 10 k

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 52).
70 90 110
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.
Troubleshooting
117