Operating instructions
Manuals
Brands
Viessmann Manuals
Heating System
WB1B Series
31
32
33
34
35
36
37
38
39
40
38
X21
X7
X20
4
3
2
1
2.
Disconnect cables from outside tem-
perature sensor.
100
10
-15
-10
-5
10
20
30
Temperature in °C
4
6
8
20
40
60
80
Resistance in kΩ
0
3.
Check the sensor resistance and
compare it with the curve.
4.
Replace
the
sensor
in
case of
severe
deviation.
Troubleshooting
Repairs
(cont.)
5366 836 GB
1
...
...
36
37
38
39
40
...
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68