Fault Codes / Fujitsu / 73.3

Airstage V-II — Outdoor unit heat exchanger liquid temp sensor error (Error code 73.3).

Possible causes

• Sensor or connector faulty/loose.
• Wiring to the sensor broken or shorted.
• Main PCB faulty (if sensor/wiring OK).

Check steps

• Measure sensor resistance and compare with the reference curve.
• Check connector and wiring.
• If sensor/wiring OK, replace main PCB.

Affected parts

• Temperatursensor
• Hauptplatine

Safety note

Source: Fujitsu Airstage V-II VRF Service Manual, "Error Code List For Outdoor Unit" p.65 + "Trouble Shooting With Error Code (Outdoor Unit)" p.82ff (ManualsLib scan of official manual)

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

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