The following Viessmann fault codes refer to the 200 and 300 series of wall mounted gas boilers with Vitotronic control unit, including the Vitodens 200-W and Vitodens 300-W, as well as the Vitodens 222-W, the Vitodens 222-F and the Vitodens 333-F. Fault codes for newer models may differ. Note: The fault code needs to be entered exactly as it is displayed on the screen of the control. E.g. fault code " F.7 " is not the same as " F7 ". Most Viessmann fault codes are short alpha-numeric codes, e.g. "A9", "FEC", "dE", "F.160", "38", "0F". 1 AKZEPTIERTE LÖSUNG. die Meldung 18 sagt aus, dass eine Unterbrechung zum Außentemperatursensor vorliegt. Bitte mal wie von @Franky beschrieben den Sensor und die Verbindungsleitung prüfen. Wenn die Meldung 18 ansteht, fährt die Anlage nach 0°C Außentemperatur, das ist so eine Art Notbetrieb. Easy to use boiler control unit. Vitotron 100: boiler control unit type VMN3. The weather-compensated control unit (type VMN3) ensures effective control and does not need to be adjusted manually. An actual efficiency level of 99.4 percent ensures energy saving operation. Vitobloc 300 type NG-15/20. Vitotrol 100-EH remote control (ENTWURF) Vitotrol 300-E wireless remote control. Vitotronic 300-K with Vitotronic 200. Communication fault, Vitotronic 100 of boiler 5-8. Vitodens 200-W / 222-F / Vitotronic 300 / 200/ 200-H / 050/200-H / 300-K / vitocontrol-S. Boiler operates based on outdoor temperature of 32°F / 0°C. Vitocontrol-S with Vitotronic 100 / Vitotronic 100 / Vitotronic 300-K with Vitotronic 300 Control mode Isolation valve configuration fault: Coding OC:2, OC:3 or OC:4 set, and coding 4E:1 not set .

viessmann vitotronic 100 fault codes