Fault Codes / Viessmann / CB

High

Vitocal — Minimum primary flow temp (brine inlet) undershot.

Possible causes

• Insufficient flow in primary circuit.
• Source temperature too low (undersized source).

Check steps

• Check primary flow.
• Check brine inlet temp & source sizing.

Affected parts

• Primärpumpe
• Solefilter

Safety note

Source: Viessmann resmi servis kılavuzu — Serviceanleitung WO1C, section 'CB Vorlauftemp. primär' (p.109): 'Verdichter schaltet sich aus. Ursache: Min. Vorlauftemperatur Primärkreis (Sole-/Lufteintritt) ist unterschritten.'

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

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