Fault Codes / Viessmann / D6

High

Vitocal — Flow switch detects no flow, compressor off.

Possible causes

• No/low flow in secondary circuit.
• Secondary pump faulty/blocked.

Check steps

• Check flow & secondary pump.
• Measure flow-switch signal (0 V = tripped).

Affected parts

• Strömungswächter
• Sekundärpumpe

Safety note

Source: Viessmann resmi servis kılavuzu — Serviceanleitung WO1C, section 'D6 Strömungswächter' (p.110-111): 'Verdichter schaltet aus... Mindestvolumenstrom im Sekundärkreis ist unterschritten.'

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

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