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VRF BACnet gateway (V8 outdoor unit device) · BACnet points list
Midea GW3-BAC gateway - V8 VRF outdoor unit device BACnet points list
Updated 11 November 2026
The Midea GW3-BAC gateway serves V8 VRF systems on BACnet IP and creates one virtual BACnet device per outdoor unit. Each outdoor-unit device has 42 objects: on/off and fault status, mode, fan speeds and status, outdoor temperature, compressor frequencies, status, discharge temperatures and currents, high and low pressure, error code, EXV openings, solenoid valves, auxiliary electric heaters and an emergency-stop command.
This page lists 42 BACnet objects for the Midea GW3-BAC gateway - V8 VRF outdoor unit device — 1 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Midea’s own free documentation, linked below.
- Manufacturer
- Midea
- Model
- GW3-BAC gateway - V8 VRF outdoor unit device
- Equipment
- VRF BACnet gateway (V8 outdoor unit device)
- Equipment type
- VRF & split air conditioners
- BACnet objects
- 42 (1 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Also known as
- GW3-BAC, Midea GW3-BAC ODU, Midea V8 outdoor unit BACnet, Midea VRF V8 BACnet IP
Reference only, provided as-is: verify against Midea’s current documentation and the live device before use. Not official Midea information. Terms of use.
BMS integration notes: Midea GW3-BAC gateway - V8 VRF outdoor unit device
Discover the outdoor unit as its own BACnet IP device (FG = 96-99 in the device ID) and read its status, pressures and temperatures. The only command is BO 1 emergency stop.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| BO 1 | Parada de emergencia | Emergency stop; must be released with the same object | Write |
| BI 1 | Estado de encendido/apagado | Run status | Read |
| AI 1 | Modo | Operating mode | Read |
| AI 4 | Temperatura ambiente | Outdoor ambient temperature | Read |
| AI 9 | Alta presión | High pressure | Read |
| AI 10 | Baja presión | Low pressure | Read |
| BI 2 | Indicación de alarma | Unit fault | Read |
| AI 11 | Código de avería | Encoded error code | Read |
Network setup
- Gateway default IP 192.168.1.8; configure it on the gateway web page (PC on the same subnet).
- BACnet UDP port default 47808 (1-65534).
- Three isolated RS-485 ports (X0Y0E, X1Y1E, X2Y2E), each for up to 8 V8 refrigerant systems; 64 indoor units max.
Watch out for
- An emergency stop set with BO 1 stays active until it is cleared with BO 1.
Midea GW3-BAC gateway - V8 VRF outdoor unit device BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BImin | 1 | Estado de encendido/apagado | On/off status | Read | 0=Apagado, 1=Encendido | |
| BImin | 2 | Indicación de alarma | Fault indication | Read | 0=Sin errores, 1=Error | |
| AImin | 1 | Modo | Operating mode | Read | 0=Apagado, 2=Refrigeración, 3=Calefacción, 4=Refrigeración forzada, 29=Refrigeración por mezcla, 30=Calefacción por mezcla | |
| AI | 2 | Fan1 | Fan 1 speed | Read | ||
| AI | 3 | Fan2 | Fan 2 speed | Read | ||
| BI | 3 | Estado del ventilador 1 | Fan 1 on/off | Read | 0=Apagado, 1=Encendido | |
| BI | 4 | Estado del ventilador 2 | Fan 2 on/off | Read | 0=Apagado, 1=Encendido | |
| AImin | 4 | Temperatura ambiente | Outdoor ambient temperature | Read | ||
| AI | 5 | Frec. del compresor 1 | Compressor 1 frequency | Read | ||
| AI | 6 | Frec. del compresor 2 | Compressor 2 frequency | Read | ||
| BI | 5 | Estado del compresor 1 | Compressor 1 on/off | Read | 0=Apagado, 1=Encendido | |
| BI | 6 | Estado del compresor 2 | Compressor 2 on/off | Read | 0=Apagado, 1=Encendido | |
| AI | 7 | Temperatura de descarga del compresor 1 | Compressor 1 discharge temperature | Read | ||
| AI | 8 | Temperatura de descarga del compresor 2 | Compressor 2 discharge temperature | Read | ||
| AImin | 9 | Alta presión | High pressure | Read | ||
| AImin | 10 | Baja presión | Low pressure | Read | ||
| AImin | 11 | Código de avería | Outdoor unit error code | Read | ||
| AI | 12 | T3 | T3 temperature | Read | ||
| AI | 13 | Temperatura de escape | Discharge superheat | Read | ||
| AI | 14 | Corriente del compresor 1 | Compressor 1 current | Read | ||
| AI | 15 | Corriente del compresor 2 | Compressor 2 current | Read | ||
| AI | 16 | CV | Capacity (HP) | Read | ||
| AI | 17 | EXV1 | EXV1 opening | Read | ||
| AI | 18 | EXV2 | EXV2 opening | Read | ||
| AI | 19 | EXV3 | EXV3 opening | Read | ||
| AI | 20 | EXV4 | EXV4 opening | Read | ||
| BI | 7 | SV1 | Solenoid valve SV1 | Read | 0=Apagado, 1=Encendido | |
| BI | 8 | SV2 | Solenoid valve SV2 | Read | 0=Apagado, 1=Encendido | |
| BI | 9 | SV3 | Solenoid valve SV3 | Read | 0=Apagado, 1=Encendido | |
| BI | 10 | SV4 | Solenoid valve SV4 | Read | 0=Apagado, 1=Encendido | |
| BI | 11 | SV5 | Solenoid valve SV5 | Read | 0=Apagado, 1=Encendido | |
| BI | 12 | SV6 | Solenoid valve SV6 | Read | 0=Apagado, 1=Encendido | |
| BI | 13 | SV7 | Solenoid valve SV7 | Read | 0=Apagado, 1=Encendido | |
| BI | 14 | SV8 | Solenoid valve SV8 | Read | 0=Apagado, 1=Encendido | |
| BI | 15 | SV8b | Solenoid valve SV8b | Read | 0=Apagado, 1=Encendido | |
| BI | 16 | SV9 | Solenoid valve SV9 | Read | 0=Apagado, 1=Encendido | |
| BI | 17 | ST1 | ST1 output status | Read | 0=Apagado, 1=Encendido | |
| BI | 18 | ST2 | ST2 output status | Read | 0=Apagado, 1=Encendido | |
| BI | 19 | ST3 | ST3 output status | Read | 0=Apagado, 1=Encendido | |
| BI | 20 | Crank1 | Auxiliary electric heater 1 status | Read | 0=Apagado, 1=Encendido | |
| BI | 21 | Crank2 | Auxiliary electric heater 2 status | Read | 0=Apagado, 1=Encendido | |
| BOmin | 1 | Parada de emergencia | Emergency stop command | Write | 0=Parada de emergencia inactiva, 1=Parada de emergencia activa |
No points match these filters.
Object ID lookup: Midea GW3-BAC V8 VRF Outdoor Unit point IDs by name
BI1Estado de encendido/apagadoBI2Indicación de alarmaAI1ModoAI2Fan1AI3Fan2BI3Estado del ventilador 1BI4Estado del ventilador 2AI4Temperatura ambienteAI5Frec. del compresor 1AI6Frec. del compresor 2BI5Estado del compresor 1BI6Estado del compresor 2AI7Temperatura de descarga del compresor 1AI8Temperatura de descarga del compresor 2AI9Alta presiónAI10Baja presiónAI11Código de averíaAI12T3AI13Temperatura de escapeAI14Corriente del compresor 1AI15Corriente del compresor 2AI16CVAI17EXV1AI18EXV2AI19EXV3AI20EXV4BI7SV1BI8SV2BI9SV3BI10SV4BI11SV5BI12SV6BI13SV7BI14SV8BI15SV8bBI16SV9BI17ST1BI18ST2BI19ST3BI20Crank1BI21Crank2BO1Parada de emergencia
Integration notes
- The manual is in Spanish; object names and state texts are kept as printed. The device may report different (for example English) names.
- Every VRF unit is its own virtual BACnet device. Device ID = ABCDEFG: ABC = gateway BACnet setting (2-400), D = RS-485 port (0-2), E = refrigerant system (0-7), FG = unit address (indoor 0-63, outdoor 96-99). Example: 192405 = setting 19, port 2, system 4, indoor unit 05.
- No units are given in the manual.
- The manual describes inputs as read-only and outputs as write-only; no priority array is documented.
- The object list names AI 2/3 Velocidad del ventilador 1/2 and BI 20/21 Manivela 1/2; the detail pages name them Fan1/Fan2 and Crank1/Crank2 (used here). BI 2 has no name on its detail page; the list name is used.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the GW3-BAC gateway - V8 VRF outdoor unit device and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Midea GW3-BAC gateway - V8 VRF outdoor unit device
How many BACnet points does the Midea GW3-BAC gateway - V8 VRF outdoor unit device have?
This list has 42 BACnet objects: 20 analog inputs, 21 binary inputs, 1 binary output. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Midea GW3-BAC gateway - V8 VRF outdoor unit device BACnet points are writable?
1 of the 42 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.
Where is the official Midea GW3-BAC gateway - V8 VRF outdoor unit device BACnet documentation?
The source is Manual de instalación y del usuario - Pasarela GW3-BAC (Spanish), revision 2024-04 (240417), published free by Midea at https://www.midea.es/wp-content/uploads/2024/04/240417_MI-MU_M_CTR_GW3-BAC-ES.pdf.
What are the minimum BACnet points to integrate the Midea GW3-BAC gateway - V8 VRF outdoor unit device?
Start with BO 1 Parada de emergencia (Emergency stop; must be released with the same object); BI 1 Estado de encendido/apagado (Run status); AI 1 Modo (Operating mode); AI 4 Temperatura ambiente (Outdoor ambient temperature); AI 9 Alta presión (High pressure); AI 10 Baja presión (Low pressure); BI 2 Indicación de alarma (Unit fault); AI 11 Código de avería (Encoded error code).
How do I check these points on the real GW3-BAC gateway - V8 VRF outdoor unit device?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Midea BACnet points lists
- VRF BACnet gateway (V8 indoor unit device)
Midea GW3-BAC gateway - V8 VRF indoor unit device
Midea V8 series VRF indoor units connected through the GW3-BAC gateway.
Also known as: GW3-BAC, Midea GW3-BAC IDU, Midea V8 BACnet gateway, Midea VRF V8 BACnet IP, Pasarela GW3-BAC - VRF hydronic module (air to water heat pump) gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - HTHM hydronic module device
Midea high-temperature hydronic modules (HTHM) on an MDV VRF system, connected through the IMMP-BAC(A) gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A - VRF indoor unit gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - indoor unit device
Midea MDV VRF and commercial indoor units connected through the IMMP-BAC(A) building control gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A - VRF outdoor unit gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - outdoor unit device
Midea MDV VRF outdoor units connected through the IMMP-BAC(A) building control gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A
Source: Manual de instalación y del usuario - Pasarela GW3-BAC (Spanish) · rev. 2024-04 (240417). Object names, instances and units are reproduced as published; descriptions are our own.