Viessmann B1HF Installation And Service Instructions Manual page 88

Troubleshooting
Repairs
(cont.)
jF jF [{] [{] [{]
% &
Fig. 45
Check cylinder temperature sensor
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
Fig. 46 Sensor type: NTC 10 k
1. Disconnect plug TS1
ule. Measure the resistance.
2. Compare the sensor resistance to the curve.
Check collector temperature sensor
100
10
1
0.1
0 20 25 40
Temperature in °C
Fig. 47 Sensor type: NTC 20 k
1. Disconnect plug TS2
ule. Measure the resistance.
2. Compare the sensor resistance to the curve.
88
Ω
from the electronics mod-
%
60 80 100
Ω
& from the electronics mod-
3. In the event of severe deviation (> 10 %), replace
the sensor.
120 140
3. In the event of severe deviation (> 10 %), replace
the sensor.