HVAC · supported

LG

ModbusBACnetREST

LG Multi V VRF and residential split systems are widely deployed in APAC and increasingly in EMEA. HVAC API talks to LG MV gateways and LG ThinQ cloud accounts to expose unified setpoint, mode, and fan-speed endpoints regardless of deployment.

Device families

Multi V VRF
3 endpoints
Split AC
2 endpoints

Endpoints & snippets

Multi V 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}/mode

Split AC

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

Fault codes & error codes

11 codes documented for LG. 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
CH 05	Indoor unit	Indoor PCB communication error with outdoor unitAsk AI to troubleshoot →	Verify RS-485 wiring polarity between indoor and outdoor units; check termination.	critical	Ask AI →
CH 06	Indoor unit	Indoor fan motor fault (BLDC lock or overcurrent)Ask AI to troubleshoot →	Inspect fan motor wiring and replace fan motor if winding resistance is out of spec.	critical	Ask AI →
CH 21	Outdoor unit	High-pressure protection (HPS trip)Ask AI to troubleshoot →	Check condenser coil and fan operation; verify refrigerant charge is not excessive.	critical	Ask AI →
CH 22	Outdoor unit	Low-pressure protection (LPS trip)Ask AI to troubleshoot →	Check refrigerant charge and filter-drier; inspect LPS switch.	critical	Ask AI →
CH 23	Outdoor unit	Compressor discharge temperature (Td) too highAsk AI to troubleshoot →	Check condenser airflow, refrigerant charge, and Td sensor.	critical	Ask AI →
CH 38	Outdoor unit	Outdoor unit inverter PCB faultAsk AI to troubleshoot →	Inspect inverter board for burnt components; verify DC bus voltage.	critical	Ask AI →
CH 74	System	Refrigerant cycle abnormality detectedAsk AI to troubleshoot →	Check for refrigerant leaks; verify expansion valve operation and all thermistor readings.	critical	Ask AI →
CH 02	Indoor unit	Indoor unit pipe temperature sensor (TE) faultAsk AI to troubleshoot →	Check TE sensor resistance and connector on indoor PCB.	warning	Ask AI →
CH 03	Indoor unit	Indoor unit return-air temperature sensor (THA) faultAsk AI to troubleshoot →	Check THA sensor resistance and wiring.	warning	Ask AI →
CH 44	Outdoor unit	Outdoor pipe temperature sensor (TL / TO) faultAsk AI to troubleshoot →	Check outdoor pipe thermistor resistance and connector.	warning	Ask AI →
CH 67	System	Inter-unit communication error (multi-outdoor system)Ask AI to troubleshoot →	Check communication wiring between outdoor units and verify address-switch settings.	warning	Ask AI →

LG

Device families

Endpoints & snippets

Fault codes & error codes

External resources