1.
Pull the leads from flue gas tem-
perature sensor
A
.
2.
Check the sensor resistance and
compare it with the curve.
3.
Replace the sensor in case of
severe deviation.
Checking the temperature limiter
Check the temperature limiter, if the burner control unit cannot be reset after a
fault shutdown, although the boiler water temperature is below approx. 75 °C.
Repairs
(cont.)
85
Troubleshooting
5692
673
GB
Summary of Contents for VITODENS 300-W
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