142
3.
Refit the casing cover.
Check flow temperature sensor
Pressure drop curve
10
1
10 30 50 70 90 110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance in k
Ω
Sensor type: NTC 10 kΩ
1.
Disconnect plug
?
(flow tempera-
ture sensor).
2.
Check the sensor resistance and
compare it with the curve.
Replace the sensor in the case of
severe deviation.
Check Vitotronic 200-H (accessory)
The Vitotronic 200-H is connected to the
control unit via the LON. To test the con-
nection, carry out a subscriber check at
the boiler control unit (see page 61).
Troubleshooting
Maintenance
(cont.)
5585 174 GB