HVAC · beta

Fujitsu

ModbusBACnetREST

Fujitsu General's Airstage VRF and Halcyon splits are common in APAC and ANZ. HVAC API's Fujitsu support is in beta with stable reads via Airstage gateways and FGLair cloud control for residential equipment.

Device families

Airstage VRF
3 endpoints
Halcyon Split
2 endpoints

Endpoints & snippets

Airstage VRF

GET /v1/devices/{id}/temperature
POST /v1/devices/{id}/setpoint
POST /v1/devices/{id}/mode

curl -H "Authorization: Bearer $HVACAPI_KEY" \
  https://api.hvacapi.com/v1/devices/{device_id}/setpoint

Halcyon Split

GET /v1/devices/{id}/temperature
POST /v1/devices/{id}/mode

Fault codes & error codes

10 codes documented for Fujitsu. Confirm against your model's service manual — some codes vary between product lines (VRV vs. Sky Air vs. residential split, etc.).

Code	Category	Meaning	Suggested action	Severity	Help
E:04	Indoor unit	Indoor unit fan motor fault (lock or speed abnormal)Ask AI to troubleshoot →	Inspect indoor fan motor wiring and replace motor if winding resistance is out of spec.	critical	Ask AI →
E:OA	Outdoor unit	High-pressure protection tripAsk AI to troubleshoot →	Check condenser coil and fan; verify refrigerant charge is not excessive.	critical	Ask AI →
E:OC	Outdoor unit	Compressor discharge temperature too highAsk AI to troubleshoot →	Check refrigerant charge, condenser airflow, and discharge thermistor.	critical	Ask AI →
E:OE	System	Indoor↔outdoor communication errorAsk AI to troubleshoot →	Verify 2-wire transmission cable polarity and continuity between indoor and outdoor units.	critical	Ask AI →
E:OH	Outdoor unit	Inverter abnormality (IPM / IGBT fault)Ask AI to troubleshoot →	Inspect inverter board; check DC bus voltage and power module for damage.	critical	Ask AI →
E:00	Indoor unit	Indoor unit signal reception error (remote controller communication)Ask AI to troubleshoot →	Check wiring between indoor unit and wired remote controller; verify polarity.	warning	Ask AI →
E:08	Indoor unit	Indoor heat-exchanger thermistor faultAsk AI to troubleshoot →	Check thermistor connector and resistance on indoor PCB; replace if outside spec.	warning	Ask AI →
E:09	Indoor unit	Indoor return-air thermistor faultAsk AI to troubleshoot →	Check return-air thermistor connector and resistance.	warning	Ask AI →
E:0L	Outdoor unit	Outdoor unit thermistor (TE / TL) faultAsk AI to troubleshoot →	Check outdoor pipe and suction thermistors; measure resistance and compare to spec table.	warning	Ask AI →
E:12	Indoor unit	Drain level sensor abnormal or drain-pump failureAsk AI to troubleshoot →	Inspect drain pump, float switch, and drain piping for blockage.	warning	Ask AI →

Fujitsu

Device families

Endpoints & snippets

Fault codes & error codes

External resources