Fault Codes / Vaillant / F.1117

flexoTHERM/aroTHERM — Compressor: phase failure.

Possible causes

• Soft starter/fuse faulty.
• Loose connections or low mains voltage.

Check steps

• Check fuse & electrical connections.
• Measure voltage at HP connection (400 V).

Affected parts

• Anlaufstrombegrenzer
• Sicherung
• Netzanschlussklemmen

Safety note

Source: Vaillant resmi servis kılavuzu — Vaillant flexoTHERM exclusive VWF 57/4 — Installation and Maintenance Instructions (E Fault Codes table, page 47): "F.1117 — Compressor: Phase failure — In-rush current limiter defective or incorrectly connected; Defective fuse; Poorly tightened electrical connections; Mains volt…

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

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