Fujitsu 72.1

Critical

Airstage V-II — Compressor temp sensor 1 error (Error code 72.1).

Fujitsu 72.1: Compressor temp sensor 1 error (Error code 72.1). This fault typically halts operation and needs immediate attention.

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

Isolate power before testing.

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.

Look up in Enthalio →

Related fault codes

Outdoor unit fan motor lock error (Error code 97.1 Compressor 1 temperature abnormal (Error code A3.1 Initial setting error (main PCB) (Error code 113.1 Communication error between outdoor units (Err14.1 Outdoor unit network communication 1 error (Er14.2 Outdoor unit network communication 2 error (Er14.5