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VRF outdoor unit monitoring via BACnet gateway · BACnet points list

CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects BACnet points list

Updated 12 November 2026

Short answer

With PRO functionality, CoolAutomation gateways publish service data from Midea CR-HR master outdoor units over BACnet: mode, preheat, oil return and defrost states, refrigerant shortage and mode change signals, fan data, high and low pressure, temperatures, compressor frequencies and currents, valve states, on/off, night silent, error code, demand and heat exchanger step (50 objects). Monitoring only.

This page lists 50 BACnet objects for the CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from CoolAutomation’s own free documentation, linked below.

Manufacturer
CoolAutomation
Model
CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects
Equipment
VRF outdoor unit monitoring via BACnet gateway
Equipment type
VRF & split air conditioners
BACnet objects
50 (0 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Default device instance
64
Also known as
Midea CR-HR VRF BACnet, Midea heat recovery VRF BACnet, CoolMasterNet Midea, CR-HR Master
Brands covered
Midea
Source document
BACnet Integration Guidelines - CoolMaster Product Line, CooLinkNet, CooLinkHub, CooLinkBridge · rev. Rev 1.0.4, 2026-07-06
Download CSV 50 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against CoolAutomation’s current documentation and the live device before use. Not official CoolAutomation information. Terms of use.

BMS integration notes: CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects

Integration in brief

Use these objects to monitor Midea outdoor equipment only; control stays on the CoolMasterNet indoor-unit objects. Map the master outdoor unit's VA and trend pressures, compressor frequency and error code.

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.

ObjectNameWhyAccess
PIV 300OnOffOutdoor unit on/off stateRead
PIV 257MdOperating mode codeRead
PIV 289INV1Compressor 1 speed, rpsRead
AI 278T4Outdoor ambient temperature, °CRead
AI 276HiPrsHigh pressure, MPaRead
AI 277LoPrsLow pressure, MPaRead
CSV 302ErrError codeRead

Enable & remote start

BACnet must be enabled on the gateway; these objects belong to its PRO (service data) functionality.

Network setup

Watch out for

CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects 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.

Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.

50 of 50 shown
Type
AnalogBinary
Show
CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects BACnet Points List
DescriptionStates
CSV256TypeOutdoor Unit Type NameRead
PIVmin257MdModeRead
BI258PreHtPreheatRead
PIV259OiRetOil ReturnRead
PIV260DfrstDefrostingRead
PIV261ShtRefSigShort of refrigerant signalRead
PIV262OvrConOver connectedRead
AI263SysT4System T4°CRead
PIV264MinDSHMin.DSH°CRead
PIV265PrtChkPort checkRead
PIV266FanStcFan staticRead
PIV267SlntStSilent StateRead
PIV268MdChngSigMode change signalRead
PIV269PIPIRead
PIV270FFFFRead
IV271TcsTcs°CRead
AI272TesTes°CRead
PIV273TonTonRead
PIV274Fan1Fan1Read
PIV275Fan2Fan2Read
AImin276HiPrsHigh pressureMPaRead
AImin277LoPrsLow pressureMPaRead
AImin278T4T4 (outdoor ambient temperature)°CRead
AI279T3AT3A°CRead
AI280T3CT3C°CRead
IV281TfTf°CRead
IV282TcTc°CRead
AI283TeTe°CRead
IV284T71T71°CRead
IV285T72T72°CRead
AI286T5T5°CRead
AI287T6T6°CRead
AI288T7T7°CRead
PIVmin289INV1INV1 (compressor 1 frequency)rpsRead
PIV290INV2INV2 (compressor 2 frequency)rpsRead
PIV291CUR1CUR1 (current 1)ARead
PIV292CUR2CUR2 (current 2)ARead
PIV293CRANK1CRANK1Read
PIV294CRANK2CRANK2Read
PIV295SV4SV4Read
PIV296SV5SV5Read
PIV297SV6SV6Read
PIV298SV7SV7Read
PIV299ST1ST1Read
PIVmin300OnOffOn/OffRead
PIV301NgtSlntNight SilentRead
CSVmin302ErrError CodeRead
PIV303DmndDemandRead
PIV304InvQtyINV QtyRead
PIV305HexStpHEXStepRead
Object ID lookup: CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit objects point IDs by name

Integration notes

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 CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects 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 CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects

How many BACnet points does the CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects have?

This list has 50 BACnet objects: 11 analog inputs, 1 binary input, 2 characterstring values, 5 integer values, 31 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects BACnet points are writable?

None of the listed objects are marked writable in the source documentation. The source has no read/write column, so this is inferred from object type.

Where is the official CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects BACnet documentation?

The source is BACnet Integration Guidelines - CoolMaster Product Line, CooLinkNet, CooLinkHub, CooLinkBridge, revision Rev 1.0.4, 2026-07-06, published free by CoolAutomation at https://support.coolautomation.com/hc/en-us/article_attachments/38262832368157.

What are the minimum BACnet points to integrate the CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects?

Start with PIV 300 OnOff (Outdoor unit on/off state); PIV 257 Md (Operating mode code); PIV 289 INV1 (Compressor 1 speed, rps); AI 278 T4 (Outdoor ambient temperature, °C); AI 276 HiPrs (High pressure, MPa); AI 277 LoPrs (Low pressure, MPa); CSV 302 Err (Error code).

How do I enable BMS control of the CoolAutomation CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects?

BACnet must be enabled on the gateway; these objects belong to its PRO (service data) functionality.

How do I check these points on the real CoolMasterNet Midea CR-HR master outdoor unit (PRO) objects?

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 CoolAutomation BACnet points lists

Source: BACnet Integration Guidelines - CoolMaster Product Line, CooLinkNet, CooLinkHub, CooLinkBridge · rev. Rev 1.0.4, 2026-07-06. Object names, instances and units are reproduced as published; descriptions are our own.