Viessmann VITODENS 100-W Installation And Service Instructions Manual page 55

Repairs
(cont.)
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70 90 110
Temperature in °C
Checking the temperature limiter
2. Compare the sensor resistance with
the curve.
3. Replace the sensor in the case of
severe deviation.
If the burner control unit cannot be reset
after a fault shutdown, although the
boiler water temperature is below
approx. 95 °C, check the temperature
A
limiter.
1. Pull the leads from temperature lim-
iter A.
2. Check the continuity of the tempera-
ture limiter with a multimeter.
3. Remove the faulty temperature lim-
iter.
4. Install a new temperature limiter.
5. Press "Reset" at the control unit (see
page 50).
Troubleshooting
55