HVAC · supported

Carrier

BACnetModbusREST

Carrier is a foundational HVAC vendor with rooftop units, chillers, and commercial split systems deployed across North America and EMEA. HVAC API normalizes Carrier i-Vu and ChillerVu interfaces behind REST endpoints for temperature, setpoint, mode, and fault state, removing the need for site-by-site BACnet integration work.

Device families

Rooftop Units

3 endpoints
Chillers

2 endpoints

Endpoints & snippets

Rooftop Units

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

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

Chillers

GET /v1/devices/{id}/state
POST /v1/devices/{id}/setpoint

Fault codes & error codes

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

13

Code	Category	Meaning	Suggested action	Severity	Help
1	Rooftop Unit	High-pressure cutout (HPS trip) Ask AI to troubleshoot →	Check condenser airflow, refrigerant overcharge, and HPS switch continuity.	critical	Ask AI →
14	Rooftop Unit	Indoor (evaporator) fan motor fault Ask AI to troubleshoot →	Inspect belt / direct-drive motor, capacitor, and overload relay.	critical	Ask AI →
17	Rooftop Unit	Ignition failure — failed to light Ask AI to troubleshoot →	Check gas supply, ignitor, and flame sensor; verify inducer prover switch.	critical	Ask AI →
2	Rooftop Unit	Low-pressure cutout (LPS trip) Ask AI to troubleshoot →	Check refrigerant charge, filter-drier restriction, and LPS switch.	critical	Ask AI →
3	Rooftop Unit	Compressor thermal protector open Ask AI to troubleshoot →	Allow compressor to cool; inspect for restricted airflow or refrigerant undercharge.	critical	Ask AI →
33	Chiller	Chilled-water low-temperature cutout Ask AI to troubleshoot →	Verify chilled-water setpoint and antifreeze concentration; check CHWLT sensor.	critical	Ask AI →
4	Rooftop Unit	Compressor contactor failure / welded Ask AI to troubleshoot →	Inspect contactor for fused contacts and replace.	critical	Ask AI →
55	Chiller	Oil pressure differential fault Ask AI to troubleshoot →	Check compressor oil level, oil pressure differential switch, and oil pump.	critical	Ask AI →
10	Rooftop Unit	Supply-air temperature sensor fault Ask AI to troubleshoot →	Check SAT thermistor connector and resistance at the IFC board.	warning	Ask AI →
22	Rooftop Unit	Limit switch open (heat exchanger overheat) Ask AI to troubleshoot →	Check return-air filter, blower speed, and heat-exchanger for restriction.	warning	Ask AI →
6	Rooftop Unit	Condensate overflow switch tripped Ask AI to troubleshoot →	Check condensate drain pan, drain line, and overflow sensor for blockage.	warning	Ask AI →
67	Controller	i-Vu BACnet communication loss Ask AI to troubleshoot →	Verify BACnet MS/TP wiring, MAC address, and i-Vu controller network configuration.	warning	Ask AI →
8	Rooftop Unit	Outdoor-air temperature sensor fault Ask AI to troubleshoot →	Check OAT sensor resistance and wiring at control board.	warning	Ask AI →

Carrier

Device families

Endpoints & snippets

Fault codes & error codes

External resources