Fujitsu 95.5

Medium

Airstage V-II — Compressor motor loss of synchronization (Error code 95.5).

Fujitsu 95.5: Compressor motor loss of synchronization (Error code 95.5). This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Compressor/inverter module overloaded or faulty.
Refrigerant undercharge or overcharge.
Wiring/connection to the compressor faulty.

Check steps

Measure compressor current and insulation resistance.
Check refrigerant charge/pressures.
Check inverter PCB and wiring.

Affected parts

Verdichter
Inverter-PCB

Safety note

Discharge capacitors, isolate power.

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