Viessmann 0B

Medium

Vitocal — Outdoor unit warning — outside operating limits.

Viessmann 0B: Outdoor unit warning — outside operating limits. This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Outside temp beyond -15…+35 °C.

Check steps

Aux heater takes over — normal at extreme temps.
If temp implausible: check outside sensor.

Affected parts

Kein Ersatzteil — Einstellung/Konfiguration prüfen (DIP, Menü, Untercode)

Safety note

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Source: Viessmann resmi servis kılavuzu — Serviceanleitung WO1C (2017-01 ed.), section '0B Außeneinheit' (p.67): 'Außeneinheit schaltet sich aus. Beheizung erfolgt mit Zusatzheizungen (falls vorhanden). Ursache: Außentemperatur außerhalb der Einsatzgrenzen: 230-V-Geräte -15°C bis +35°C / 400-V-Geräte -20°C bis +35°C (Hei…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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