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VRF outdoor unit monitoring via BACnet gateway · BACnet points list

CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects BACnet points list

Updated 12 November 2026

Short answer

With PRO functionality, CoolAutomation gateways publish service data from Mitsubishi Heavy Industries outdoor units of the JL4C series over BACnet: outdoor, heat exchanger, discharge, under-dome and suction temperatures, compressor currents, high and low pressure, operation mode, inverter speed, fan speeds, EEV positions, oil return data, relay and solenoid valve states and calculated superheats (68 objects). Monitoring only.

This page lists 68 BACnet objects for the CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C 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 Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects
Equipment
VRF outdoor unit monitoring via BACnet gateway
Equipment type
VRF & split air conditioners
BACnet objects
68 (0 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Default device instance
64
Also known as
Mitsubishi Heavy VRF BACnet, MHI KX BACnet, CoolMasterNet MH, JL4C
Brands covered
Mitsubishi Heavy Industries
Source document
BACnet Integration Guidelines - CoolMaster Product Line, CooLinkNet, CooLinkHub, CooLinkBridge · rev. Rev 1.0.4, 2026-07-06
Download CSV 68 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 Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects

Integration in brief

Use these objects to monitor Mitsubishi Heavy Industries outdoor equipment only; control stays on the CoolMasterNet indoor-unit objects. Map the outdoor block's VA and trend pressures, compressor speed and the error output.

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 279OpeModeOperation mode codeRead
BI 305CnHOperation output (unit running)Read
PIV 281Inv1HzInverter compressor 1 speed, HzRead
AI 257ThoAOutdoor air temperature, °CRead
AI 277HPHigh pressure, MPaRead
AI 278LPLow pressure, MPaRead
AI 262ThoD1Discharge temperature 1, °CRead
BI 306CnYError output signal (CnY)Read

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 Mitsubishi Heavy Industries JL4C 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.

68 of 68 shown
Type
AnalogBinary
Show
CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects BACnet Points List
DescriptionStates
CSV256TypeOutdoor Unit Type NameRead
AImin257ThoAOutdoor air Temperature°CRead
AI258ThoR1Heat Exchanger Temp.1°CRead
AI259ThoR2Heat Exchanger Temp.2°CRead
AI260ThoR3Heat Exchanger Temp.3°CRead
AI261ThoR4Heat Exchanger Temp.4°CRead
AImin262ThoD1Discharge Temp.1°CRead
AI263ThoD2Discharge Temp.2°CRead
AI264ThoC1Under-dome Temp.1°CRead
AI265ThoC2Under-dome Temp.2°CRead
AI266ThoP1ThoP1°CRead
AI267ThoP2ThoP2°CRead
AI268ThoSThoS°CRead
AI269ThoSCThoSC°CRead
AI270ThoHThoH°CRead
AI271ThoI1ThoI1(spare)°CRead
AI272ThoTho(spare)°CRead
AI273CT1Comp.1 CurrentARead
AI274CT2Comp.2 CurrentARead
AI275CT-inv1CT-inv1ARead
AI276CT-inv2CT-inv2ARead
AImin277HPHigh PressureMPaRead
AImin278LPLow PressureMPaRead
PIVmin279OpeModeOperation ModeRead
PIV280OpePattOperation PatternRead
PIVmin281Inv1HzINV1 Actual HzHzRead
PIV282Inv2HzINV2 Actual HzHzRead
PIV283FMO1FMO1(DC)rpmRead
PIV284FMO2FMO2(DC)rpmRead
IV285EEVH1EEVH1plsRead
IV286EEVH2EEVH2plsRead
IV287EEVSCEEVSCplsRead
IV288EEVDEEVDplsRead
AI289ClTrgLPCooling Target LPMPaRead
AI290HtTrgHPHeating Target HPMPaRead
PIV291CSST-DifHeating target CSST Temp. Difference°CRead
PIV292EEVH-PosOutdoor EEVH Initial Learning Opening PositionplsRead
AI293EEVSC-TgShTarget Superheat of EEVSC°CRead
PIV294OiRetAcc1Oil Return Accumulated Ammount(CM1)ccRead
PIV295OiRetAcc2Oil Return Accumulated Ammount(CM2)ccRead
PIV296OiRetCntDnOil Return Count DownminRead
BI29752C152C1Read
BI29852C252C2Read
BI299CH1CH1Read
BI300CH2CH2Read
BI30120S20SRead
BI302ClFnCooling FanRead
BI303VnFnVentilation FanRead
BI304CnZExternal Output (CnZ)Read
BImin305CnHOperation Output (CnH)Read
BImin306CnYError Output (CnY)Read
BI307SV1SV1Read
BI308SV2SV2Read
BI309SV3SV3Read
BI310SV4SV4Read
BI311SV6SV6Read
BI312SV7SV7Read
BI313SV8SV8Read
BI314SV10SV10Read
BI315SV11SV11Read
BI316SV12SV12Read
BI317SV13SV13Read
AI318DisPrsSatTDischarge Pressure Saturated Temperature°CRead
AI319SctPrsSatTSuction Pressure Saturated Temperature°CRead
AI320SctShSuction Superheat°CRead
AI321ScCiShSubcooling Coil Superheat°CRead
AI322UdSh1Under-dome Superheat 1°CRead
AI323UdSh2Under-dome Superheat 2°CRead
Object ID lookup: CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C outdoor unit (PRO) 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 Mitsubishi Heavy Industries JL4C 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 Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects

How many BACnet points does the CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects have?

This list has 68 BACnet objects: 31 analog inputs, 21 binary inputs, 1 characterstring value, 4 integer values, 11 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C 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 Mitsubishi Heavy Industries JL4C 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 Mitsubishi Heavy Industries JL4C outdoor unit (PRO) objects?

Start with PIV 279 OpeMode (Operation mode code); BI 305 CnH (Operation output (unit running)); PIV 281 Inv1Hz (Inverter compressor 1 speed, Hz); AI 257 ThoA (Outdoor air temperature, °C); AI 277 HP (High pressure, MPa); AI 278 LP (Low pressure, MPa); AI 262 ThoD1 (Discharge temperature 1, °C); BI 306 CnY (Error output signal (CnY)).

How do I enable BMS control of the CoolAutomation CoolMasterNet Mitsubishi Heavy Industries JL4C 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 Mitsubishi Heavy Industries JL4C 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.