Fault Codes / Aux / F9

AU

Aux F9

High

Inverter — Outdoor unit PCB EE(PROM) error.

Aux F9: Outdoor unit PCB EE(PROM) error. This fault noticeably affects operation.

Possible causes

EEPROM chip faulty or main board faulty.

Check steps

Restart power; if it persists, replace the main board.

Affected parts

Außeneinheit-Hauptplatine

Safety note

Isolate power before testing.

Source: AUX Air Conditioner Error Codes Reference, official auxair.com/global/error-codes.html (© 2024 AUX)

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

Look up in Enthalio →

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