What does fault code A9 mean on a Viessmann Vitodens 111-W?
If your Viessmann Boiler displays fault code A9, it indicates a communication error with the OpenTherm device. Check the connections and lead; replace the OpenTherm device if required.
What to do if Viessmann Vitodens 111-W Boiler shows F8 error?
If your Viessmann Boiler displays the F8 error, it means the fuel valve closes too late. Check the gas train and both control paths. Press the reset button.
Viessmann Boiler displays F8, what could be the reason?
If your Viessmann Boiler displays fault code F8, it means the fuel valve closes too late. Check the gas train and both control paths. You can also try pressing 'Reset'.
What does error code E5 mean on a Viessmann Vitodens 111-W?
An E5 error on your Viessmann Boiler indicates an internal fault. Check the ignition/ionisation electrode and connecting cables and press the reset button.
What does FC error code mean for Viessmann Vitodens 111-W Boiler?
The FC error on your Viessmann Boiler indicates a fault with the electrical fan control (control unit). Check the fan connecting cable. If required, replace the fan or the control unit.
Why Viessmann Vitodens 111-W fan starts no after approx. 1 min?
The fan in your Viessmann Boiler might not start after approximately 1 minute due to fault F9. Check the fan, fan connecting cables, power at the fan, and fan control.
What should I do if my Viessmann Vitodens 111-W Boiler displays fault code Fd?
If your Viessmann Boiler displays fault code Fd, it indicates a fault in the burner control unit. Check the ignition electrodes and connecting cables. Check whether a strong interference (EMC) field exists near the appliance. You can also try pressing 'Reset'. If the fault persists, replace the control unit.
What does fault code FF mean on Viessmann Vitodens 111-W?
Fault code FF on a Viessmann Boiler indicates a fault in the burner control unit. Check the ignition electrodes and connecting cables and check for a strong interference (EMC) field near the appliance. You can also try pressing 'Reset'. If the fault persists, replace the control unit.
How do I troubleshoot Viessmann Vitodens 111-W fault code F9?
If your Viessmann Boiler shows fault code F9, it means the fan speed is too low during burner start. Check the fan, fan connecting cables, and power supply, and also check the fan control. You can also try pressing 'Reset'.
What causes fault code F2 on a Viessmann Vitodens 111-W and how to fix it?
Fault code F2 on your Viessmann Boiler indicates that the temperature limiter has responded. You should check the heating system fill level, check the circulation pump and vent the system. Also, check the temperature limiter and connecting cables. You can also try pressing 'Reset'.
General| Type | Gas Condensing Boiler |
|---|---|
| Dimensions | 900 x 600 x 480 mm |
| Energy Efficiency Class | A |
| Mounting | Wall-mounted |
| Water Pressure | Max. 3 bar |
| Max. Flow Temperature | 80 °C |
| Efficiency | Up to 98% |
| Hot Water Storage | 46 liters |
| Fuel Type | Natural gas or LPG |
| DHW Output | Up to 200 liters in 10 minutes (depending on model and cold water temperature) |
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