All Fujitsu error codes
This page brings together Fujitsu error codes sorted by type of failure: what each code means, its likely causes, and what you can safely check before calling a professional.
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The Fujitsu codes on this page, grouped by type of failure.
Compressor — Fujitsu
The compressor is the central and most expensive part. These codes protect the unit by shutting it down before damage occurs: never force repeated restarts.
Code 16Critical severitymini-split
Compressor overcurrent protection
Possible causes
- Compressor struggling
- Insufficient supply voltage
- Incorrect refrigerant charge
What you can check
- Check the voltage at the electrical panel
- Cut the power for 1 hour, then restart
Models affected: AOYG, AOHG, AOY
This issue requires a qualified technician. Do not open the unit.
Discharge temperature — Fujitsu
The temperature at the compressor outlet exceeds the safety threshold. This points to a refrigerant shortage or poor heat exchange.
Code 13Critical severitymini-split
Communication fault: signal from the indoor unit not received by the outdoor unit
Possible causes
- Faulty interconnection cable
- Failed electronic board
Models affected: AOYG, AOHG, AOY
This issue requires a qualified technician. Do not open the unit.
All Fujitsu codes published on the site
This list updates automatically whenever a new guide is added.
Technical information provided for guidance only, based on manufacturer documentation and field feedback. It does not replace the diagnosis of a qualified professional. Found an error on this page? Report it.