Viessmann 30

Medium

Vitocal — Primary flow temp sensor fault.

Viessmann 30: Primary flow temp sensor fault. This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Sensor (Pt 500) shorted or open.

Check steps

Check resistance (Pt 500) at connector.
Replace sensor if faulty.

Affected parts

Primär-Vorlaufsensor (Pt 500)

Safety note

Isolate power.

Source: Viessmann resmi servis kılavuzu — Manual p.29: '30 Vorlaufsensor primär' = Kurzschluss Vorlauftemperatursensor Primärkreis. Matches Enthalio DB.

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

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