To Next PageTo Next PageWhat to do if there is a communication fault with the programming unit of Viessmann Boiler?
If your Viessmann Boiler displays error 'b1', indicating a communication fault with the programming unit (internal), check the connections and replace the programming unit if required.
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.
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.
Why is the ionization current outside the permissible range during Viessmann Boiler calibration?
If your Viessmann Boiler displays error 'EC', and the ionization current lies outside the permissible range during calibration, you should check the ionization electrode and cable and then press 'RESET'.
What to do if the ionization current is outside range during calibration of Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'EA', and the ionization current lies outside the permissible range during calibration, you should check the ionization electrode and cable. Press ” RESET”.
Why is the ionization current outside the permissible range during calibration of my Viessmann Boiler?
If your Viessmann Boiler displays error 'E9', where the ionization current lies outside the permissible range during calibration, check the ionization electrode and cable. Also, check the venting system for leaks and then press 'RESET'.
What does it mean when the burner control unit is faulty on a Viessmann Boiler?
If your Viessmann Boiler displays error 'Fd', which indicates a burner control unit fault, check the ignition electrodes and connecting cables. Verify whether a strong interference (EMC) field exists near the equipment. Press RESET and replace the control unit if the fault persists.
What to do if the boiler coding card is missing on Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'b7' because the boiler coding card is missing, faulty, or incorrect, plug in the boiler coding card or replace it if it is faulty.
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'.
Why is the fan speed too low during burner start on my Viessmann Vitodens 200-W WB2B?
If your Viessmann Boiler displays error 'F9', indicating the fan speed is too low during burner start, you should check the fan, the fan cables and power supply, and the fan control. 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 |
