Fault Codes / Viessmann / AF

Viessmann AF

High

Vitocal — DHW charging pump fault.

Viessmann AF: DHW charging pump fault. This fault noticeably affects operation.

Possible causes

Pump blocked / faulty / wiring.

Check steps

Check charging pump & wiring.
Free/replace pump.

Affected parts

Speicherladepumpe

Safety note

230V — isolate power.

Source: Viessmann resmi servis kılavuzu — Manual p.38: 'AF Speicherladepumpe' = Temperaturänderung Speicher-Wassererwärmer zu gering. Matches Enthalio DB.

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

Look up in Enthalio →

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