Viessmann B2HF - Page 108

108
jF jF
[{] [{] [{]
&%
Fig. 52
Check cylinder 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. 53 Sensor type: NTC 10 kΩ
1.
Disconnect plug TS1
%
from the electronics mod-
ule. Measure the resistance.
2. Compare the sensor resistance to the curve.
3. In the event of severe deviation (> 10 %), replace
the sensor.
Check collector temperature sensor
0.1
1
10
100
0 20 40 60 80 100 120 140
Temperature in °C
Resistance in kΩ
25
Fig. 54 Sensor type: NTC 20 kΩ
1.
Disconnect plug TS2
&
from the electronics mod-
ule. Measure the resistance.
2. Compare the sensor resistance to the curve.
3. In the event of severe deviation (> 10 %), replace
the sensor.
Troubleshooting
Repairs (cont.)
5593201
Diagnosis