Fault Codes / Vaillant / F.554
flexoTHERM/aroTHERM — Refrigerant pressure out of operating range.
Vaillant F.554: Refrigerant pressure out of operating range. This fault typically halts operation and needs immediate attention.
Source: Vaillant resmi servis kılavuzu — ManualsLib s.39: 'F.554 – Coolant pressure not in operating range'
Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.
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