Viessmann fault codes
From the Viessmann manuals on file, range by range.
Viessmann Vitodens 050-W
Viessmann Vitodens 100-W
- 416Flue gas temperature sensor placement fault during commissioning
- 694Burner in a fault state, signal comparison deviation, flue gas high limit safety cut-out
- 799No DHW heating, no central heating, central heating circuit pump electrical fault
- 980No DHW heating (minimum system pressure too low before start)
- 981No DHW heating (minimum system pressure too low during DHW heating)