Fault Codes / Viessmann / B5

VI

Viessmann B5

High

Vitocal — EEPROM fault (internal memory).

Viessmann B5: EEPROM fault (internal memory). This fault noticeably affects operation.

Possible causes

Controller internal memory faulty.

Check steps

Restart controller; check settings.
Replace PCB if fault persists.

Affected parts

Regelung-Leiterplatte

Safety note

Isolate power.

Source: Viessmann resmi servis kılavuzu — Manual p.39: 'B5 EEPROM' = Interner Fehler EEPROM. Matches Enthalio DB exactly.

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

Look up in Enthalio →

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