Vaillant F.731

Medium

flexoTHERM/aroTHERM — High-pressure switch open – refrigerant pressure too high (46 bar(g)).

Vaillant F.731: High-pressure switch open – refrigerant pressure too high (46 bar(g)). This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Insufficient flow (closed valves).
Poor heat dissipation / strainers clogged.

Check steps

Bleed building circuit, check strainers.
Open valves, ensure minimum flow.

Affected parts

Schmutzsieb
EEV
Vier-Wege-Ventil

Safety note

High pressure – danger; service only.

Source: Vaillant resmi servis kılavuzu — vaillant.de resmi sayfası (bağımsız yeniden doğrulandı): 'Kältemitteldruck zu hoch. Der Hochdruckschalter im Kältemittelkreis wurde ausgelöst.' — kodbazı ile anlamsal örtüşüyor; '46 bar(g)' spesifik değeri doğrulanamadı.

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

Look up in Enthalio →

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