To Next PageTo Next PageHow to troubleshoot communication fault with variable speed circulation pump on Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'C5', indicating a communication fault with the variable speed circulation pump of the heating circuit connection set, check the setting of coding address ”30” and set it to “0” (30:”0”).
What to do if the fixed high limit switch is open on a Viessmann Boiler?
If your Viessmann Boiler shows the error 'F2', which means the fixed high limit switch is open (activated), you should check the heating system fill level and the circulation pump. Bleed air from the system and inspect the fixed high limit switch and connecting cables. Finally, press the 'RESET' button.
What to do if the flame signal is missing on Viessmann Boiler at burner start?
If the Viessmann Boiler displays error 'EE', indicating a missing or weak flame signal at burner start, you should check the ionization electrode and cable. Also, check the gas supply, condensate drain, ignition, and ignition module. Then, press the 'RESET' button.
What causes Viessmann Vitodens 200-W WB2B Boiler to overheat?
If your Viessmann Boiler displays the error 'F1', which indicates that the maximum flue gas temperature has been exceeded (230ºF / 110ºC), you should check the heating system fill level and bleed air from the system. After the system has cooled down, press the 'RESET' button.
How do I fix a communication fault with the variable speed circulation pump in my Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'C7', indicating a communication fault with the variable speed circulation pump of the heating circuit without a mixing valve, check the setting of coding address ”E5”.
How do I resolve a Vitocom 100 (KM-BUS) communication fault on my Viessmann Vitodens 200-W WB2B Boiler?
If your Viessmann Boiler displays error 'Cd', indicating a communication fault with the Vitocom 100 (KM-BUS), check coding address ”95” and set the value to 95:0.
Why does the gas valve close too late on my Viessmann Boiler?
If the Viessmann Boiler displays error 'F8', indicating the gas valve closes too late, check the gas valve and both control wiring/connections. Press RESET.
How to fix communication fault with the accessory kit on Viessmann Boiler?
If your Viessmann Boiler displays error 'bA', indicating a communication fault with the accessory kit for the heating circuit with mixing valve, check the accessory kit connections and coding. Turn on the accessory kit.
What does it mean when the ionization current is outside the permissible range on a Viessmann Boiler?
If your Viessmann Boiler displays error 'E8', and the ionization current lies outside the permissible range, you should check the ionization electrode and cable and then press 'RESET'.
What does error code Eb mean on a Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'Eb', and the boiler control initiated a combustion calibration but could not complete the process, ensure the heat generated by the boiler is being removed. Check the connecting cable and the ionization electrode, and inspect the flue gas system for flue gas recirculation. Verify pump operation and check the switching points of the flow switch. Check the coding card, gas valve, and coding address 82. Also see address 12. Press ” RESET”.
General| Type | Condensing Boiler |
|---|---|
| Fuel Type | Natural Gas/LPG |
| Heat Exchanger | Stainless Steel Inox-Radial |
| Installation | Wall-mounted |
| Max. Working Pressure | 3 bar |
| Efficiency | Up to 98% |
| Modulation Ratio | Up to 1:6 |
| Control | Vitotronic control system |
Essential safety, installation, and warranty guidelines for the boiler.
Risks and prevention measures for carbon monoxide exposure.
Measures to prevent and respond to fire hazards associated with the boiler.
Initial steps, boiler model details, and factory presets for operation.
Explanation of the control unit, buttons, displays, symbols, and heating circuits.
Instructions for starting, stopping, and standby operation of the heating system.
Setting permanent, reduced, temporary, and holiday room temperatures.
Configuring domestic hot water heating settings and schedules.
Customizing time, date, language, and display contrast settings.
Viewing temperatures, operating status, time programs, and fault codes.
Addressing heating issues and adjusting boiler behavior based on symptoms.
Annual inspection and maintenance by qualified contractors for optimal performance.
Advice for efficient heating, water usage, and improving insulation.
Procedures for safe appliance lighting and general operating guidelines.
