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
If the burner control unit cannot be reset after a fault shutdown, although the
boiler water temperature is below approx. 90 °C, check the following:
Repairs
(cont.)
77
Troubleshooting
5692
779
GB
Summary of Contents for VITOLADENS333-F
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