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 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.
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.
Why is my Viessmann Vitodens 111-W Boiler showing fault code E3?
If your Viessmann Boiler is displaying fault code E3, it indicates a fault in the safety chain. Check the temperature limiter and connecting cables. Also, check the control unit, and replace it if required.
What does fault code FA on my Viessmann Boiler mean?
If your Viessmann Boiler displays fault code FA, it indicates that the fan idle state has not been reached. Check the fan, fan connecting cables, and fan control. You can also try pressing 'Reset'.
How to resolve Viessmann Vitodens 111-W Boiler fault code FC?
If your Viessmann Boiler is showing fault code FC, it means there is a fault with the electrical fan control (control unit). Check the fan connecting cable and replace it if required, or replace the control unit.
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 to do if Viessmann Vitodens 111-W Boiler shows fault code F3?
If your Viessmann Boiler shows fault code F3, it means a flame signal is already present at burner start. Check the ionisation electrode and connecting cable. You can also try pressing 'Reset'.
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.
Why does my Viessmann Vitodens 111-W Boiler display fault code 0C?
If your Viessmann Boiler displays fault code 0C, it means the mains voltage is too low. Check the power supply.
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) |
General safety guidance for users to prevent accidents and material losses.
Explanation of warning symbols like 'Danger' and 'Please note' used in the manual.
Critical safety precautions for authorized contractors during installation and maintenance.
Safety guidelines for operating the appliance, handling components, and common operational risks.
Procedures for handling gas leaks, flue gas, fire, water leaks, and system faults.
Explanation of symbols, key terms, and the proper application of the heating system.
Details about the control unit, different operating modes, and system configurations.
Overview of factory settings and advice for energy efficiency and user comfort.
How to interact with the control unit via touchscreen and understand status displays.
Guide to accessing and adjusting various system settings through the main menu.
Determining heating schedules by dividing the day into time phases for central heating and DHW.
Step-by-step instructions for setting time programs for central heating and DHW.
Setting desired temperatures and adjusting heating curves for optimal room heating.
Using 'holiday at home' and 'holiday program' functions for energy saving during absences.
Instructions for turning DHW heating on/off and adjusting the domestic hot water temperature.
Enabling and using the Eco function for efficient DHW heating, especially with combi boilers.
Adjusting display brightness, standby mode, and the status Lightguide indicator.
Setting the system's date and time, and establishing internet and WiFi connections.
Viewing current system data, checking software licenses, and WiFi status.
Identifying and interpreting fault messages, including burner lockouts and error codes.
Procedures for activating and deactivating the emissions test mode for flue gas checks.
Steps for safely switching off the heating system with or without frost protection.
Instructions for turning the system on, checking pressure, and verifying operation.
Diagnosing and resolving issues with room temperature and domestic hot water supply.
Addressing burner lockouts, fault codes, and general heating system errors.
Guidance on cleaning the appliance and the importance of regular professional inspections.
Checking safety valves and maintaining potable water filters for system integrity.
Detailed explanation and graphical representation of heating curves.
Information on environmentally responsible disposal of packaging and the heating system.
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