Viessmann WB2B Operations Instructions Page 86

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Checking 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, check the following:
1. Pull the leads from
thermocouple A.
2. Check the continuity of the thermo-
couple with a multimeter.
3. Remove the faulty thermocouple.
4. Install a new thermocouple.
5. After commissioning, press reset
button "E RESET" at the control
unit.
Repairs (cont.)
86
Troubleshooting
5692 672 GB
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