Why Viessmann VITOTRONIC 200 Control Unit displays fault code 18?
- JJacob DavisSep 4, 2025
If your Viessmann Control Unit displays fault code 18, it indicates a lead break in the outside temperature sensor. Check the outside temperature sensor.
Why Viessmann VITOTRONIC 200 Control Unit displays fault code 18?
If your Viessmann Control Unit displays fault code 18, it indicates a lead break in the outside temperature sensor. Check the outside temperature sensor.
Why Viessmann Control Unit displays fault code A7?
The Viessmann Control Unit displays fault code A7 because the time is set incorrectly. To resolve this, reset the time.
Why Viessmann Control Unit displays fault code b0?
If your Viessmann Control Unit displays fault code b0, there's a short circuit in the flue gas temperature sensor. Check the flue gas temperature sensor.
What to do if Viessmann Control Unit displays fault code 50?
If your Viessmann Control Unit displays fault code 50, it indicates a short circuit in the cylinder temperature sensor. Check the cylinder temperature sensor.
What causes Viessmann VITOTRONIC 200 to display fault code 38?
If the Viessmann Control Unit displays fault code 38, it indicates a lead break in the boiler water temperature sensor. Check the boiler water temperature sensor.
Why Viessmann VITOTRONIC 200 displays fault code 30?
If your Viessmann Control Unit displays fault code 30, it means there's a short circuit in the boiler water temperature sensor. You should check the boiler water temperature sensor.
Why Viessmann VITOTRONIC 200 Control Unit displays fault code 10?
If your Viessmann Control Unit displays fault code 10, the cause is a short circuit in the outside temperature sensor. You should check the outside temperature sensor.
How to troubleshoot Viessmann Control Unit fault code bA?
If your Viessmann Control Unit displays fault code bA, it indicates a communication error with the mixer extension kit. Check the connections and the rotary selector setting.
What to do if Viessmann Control Unit displays fault code C2?
If the Viessmann Control Unit displays fault code C2, it indicates a lead break in the KM BUS to the solar control module or Vitosolic. Check the KM BUS cable and the appliance. If you don't have a solar control unit, set code "54:0" in the "General" group.
What to do if Viessmann Control Unit displays fault code b1?
If the Viessmann Control Unit shows fault code b1, there is a communication error with the programming unit. Check the connections and replace the programming unit if necessary.
Model | VITOTRONIC 200 |
---|---|
Category | Control Unit |
Manufacturer | Viessmann |
Display | LCD |
Connectivity | Wired |
Compatibility | Viessmann heating systems |
Operating Voltage | 230 V AC |
Application | Heating systems |
Operating modes | Automatic, Holiday |
Ambient temperature | 0°C to +45°C |
Temperature sensor | Integrated |
Provides crucial safety information to prevent accidents and material losses, explaining warning symbols.
Covers symbols, intended use, appliance description, equipment, functions, and system setup.
Explains how to open the control unit and introduces the programming unit for system management.
Details various operating programs for heating, cooling, DHW, and ventilation modes.
Introduces and explains how to set time programs for automated system operation schedules.
Covers settings for room temperature, operating programs, and time programs for heating and cooling.
Explains settings for DHW temperatures, operating programs, and time programs for hot water supply.
Details starting, stopping, operating programs, and comfort/saving modes for the ventilation system.
Provides solutions for common issues such as temperature problems, no hot water, and system messages.
Outlines cleaning procedures for the heating system, ventilation unit, and filter replacement.
Explains how to access system information, solar yield, energy statements, and daily logs.
Contains technical references like refrigerant data, extended menu overview, and terminology.
Provides contact information for local contractors for system questions, maintenance, or repair.