Fault Codes / Vaillant / F.752

VA

Vaillant F.752

Critical

flexoTHERM/aroTHERM — Inverter fault.

Vaillant F.752: Inverter fault. This fault typically halts operation and needs immediate attention.

Possible causes

Inverter box damaged / cooler blocked.
Faulty supply / parameter wrong.

Check steps

Check inverter box & cooling.
Check supply & parameter per manual.

Affected parts

Wechselrichterbox (Umrichter)

Safety note

High voltage! Let capacitors discharge before work.

Source: Vaillant resmi servis kılavuzu — ManualsLib s.40: 'F.752 – Fault: Inverter'

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

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