47
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. 41
Sensor type: NTC 10 k
Ω
1.
Disconnect leads from outlet temperature sensor
A
.
2.
Check sensor resistance and compare it to the
curve.
3.
In the event of severe deviation replace the sensor.
Danger
The outlet temperature sensor is directly
immersed in the DHW (risk of scalding).
Drain the boiler on the DHW side before
replacing the sensor.
Checking the temperature limiter
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 limiter.
A
Fig. 42
1.
Disconnect the leads from temperature limiter
A
.
2.
Check the continuity of the temperature limiter with
a multimeter.
3.
Remove faulty temperature limiter.
4.
Install a new temperature limiter.
5.
Reset by pressing "Reset" on the control unit (see
page 42).
Troubleshooting
Repairs
(cont.)
5697789
Diagnosis
Содержание Vitodens 111-W
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