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Close control air handling unit · BACnet points list

Carrier CCU Controller close control unit (Modbus to BACnet gateway option) BACnet points list

Updated 7 November 2026

Short answer

Carrier's European close control units use the CCU controller, which speaks Modbus RTU. An optional factory gateway kit republishes a short set of values on BACnet IP or BACnet MS/TP for up to two units: temperatures and humidity, cooling, heating and humidity setpoints, fan speed command, coil, humidifier and fresh-air outputs, run states and fault flags.

This page lists 41 BACnet objects for the Carrier CCU Controller close control unit (Modbus to BACnet gateway option) — 6 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Carrier’s own free documentation, linked below.

Manufacturer
Carrier
Model
CCU Controller close control unit (Modbus to BACnet gateway option)
Equipment
Close control air handling unit
Equipment type
Rooftop units, AHUs & DOAS
BACnet objects
41 (6 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Controller V21 or later (gateway compatibility)
Default device instance
1003
Also known as
Carrier CCU Controller, Carrier close control unit, Precision air conditioning controller, EN7519369
Source document
Control Manual, Close control units, Carrier CCU Controller · EN7519369-06 · rev. 2023-02
Download CSV 41 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 Carrier’s current documentation and the live device before use. Not official Carrier information. Terms of use.

BMS integration notes: Carrier CCU Controller close control unit (Modbus to BACnet gateway option)

Integration in brief

Set the CCU controller's Modbus parameters (P700-P706) so the gateway can poll it, then use OnOff (BV 13) and the temperature and humidity setpoints from the BMS, and read the controlled temperature and humidity, fan state and the two fault summaries.

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
BV 13OnOffUnit on/off command, 1 = onWrite
AV 7CoolSetptCooling temperature setpointWrite
AV 4HeatSetptHeating temperature setpointWrite
AV 5DeshuSetptDehumidification humidity setpointWrite
AV 6HumidSetptHumidification humidity setpointWrite
BV 14VentilSoufSupply fan runningRead
AV 1TempReguleeControlled (room/return) temperatureRead
AV 15HygroReguleeControlled humidityRead
BV 28DefImportantCritical fault summaryRead
BV 27DefSimpleNon-critical fault summaryRead

Enable & remote start

P706 must be set to Remote on the controller for gateway (BMS) control.

Network setup

Watch out for

Carrier CCU Controller close control unit (Modbus to BACnet gateway option) 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.

41 of 41 shown
Type
AnalogBinary
Access
Show
Carrier CCU Controller close control unit (Modbus to BACnet gateway option) BACnet Points List
DescriptionStates
AV2OutdoorTempOutdoor temperature (P258)°CRead
AVmin1TempReguleeControlled temperature (P255)°CRead
AVmin15HygroReguleeControlled humidity (P256)%RHRead
AV3OutdoorHygroOutdoor humidity (P265)%RHRead
AVmin7CoolSetptCooling temperature setpoint (P103)°CWrite
AVmin4HeatSetptHeating temperature setpoint (P106)°CWrite
AV10PresDifFiltreFilter differential pressure (P257)PaRead
AV11TempSouffSupply air temperature (P259)°CRead
AV9PresPlancherRaised floor differential pressure (P266)PaRead
AV22PourBatChaudHeating coil percentage (P291)%Read
AV21PourBatFroidCooling coil percentage (P292)%Read
AV24PourHumidifHumidifier percentage (P294)%Read
AV20PourDebitAirAir flow rate percentage (P295)%Read
AV25PourAirNeufFresh air percentage (P296)%Read
AV23PourBatElecElectric heater percentage (P297)%Read
AVmin5DeshuSetptHumidity setpoint during dehumidification (P109)%RHWrite
AVmin6HumidSetptHumidity setpoint during humidification (P115)%RHWrite
AV8FanSpeedCmdRotation speed percentage (P155)%Write
BVmin14VentilSoufSupply air fan operation (p330)Read0=Off, 1=On
BV16GroupCond1Compressor 1 operation - condensing unit 1 (p300)Read0=Off, 1=On
BV17GroupCond2Compressor 2 operation - condensing unit 2 (p304)Read0=Off, 1=On
BV18Eta1BatElecStage 1 electric heater operation (p320)Read0=Off, 1=On
BV19Eta2BatElecStage 2 electric heater operation (p322)Read0=Off, 1=On
BV12DemMarcheStart-up request (p279)Read0=Off, 1=On
BVmin28DefImportantCritical fault summary (p350)Read1=Fault
BVmin27DefSimpleNon-critical fault summary (p352)Read1=Fault
BV29DefVentilSoufSupply air fan faultRead1=Fault
BV30DefDebitAirAir flow faultRead1=Fault
BV31DefFiltreEncFilter fouled faultRead1=Fault
BV32DefFiltreBouClogged filter faultRead1=Fault
BV33DefBatElecElectric heater faultRead1=Fault
BV36DefHumidifHumidifier faultRead1=Fault
BV41DefFuiteEauWater leak faultRead1=Fault
BV34DefGroupCon1Condensing unit 1 faultRead1=Fault
BV35DefGroupCon2Condensing unit 2 faultRead1=Fault
BV37DefTempHautHigh temperature faultRead1=Fault
BV38DefTempBasLow temperature faultRead1=Fault
BV39DefHygroHautHigh humidity faultRead1=Fault
BV40DefHygroBasLow humidity faultRead1=Fault
BVmin13OnOffOn/offWrite0=Off, 1=On
BV26SecuExtExternal safety (p278)Read0=Open
Object ID lookup: Carrier CCU Controller close control unit 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 CCU Controller close control unit (Modbus to BACnet gateway option) 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 Carrier CCU Controller close control unit (Modbus to BACnet gateway option)

How many BACnet points does the Carrier CCU Controller close control unit (Modbus to BACnet gateway option) have?

This list has 41 BACnet objects: 18 analog values, 23 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Carrier CCU Controller close control unit (Modbus to BACnet gateway option) BACnet points are writable?

6 of the 41 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 Carrier CCU Controller close control unit (Modbus to BACnet gateway option) BACnet documentation?

The source is Control Manual, Close control units, Carrier CCU Controller (EN7519369-06), revision 2023-02, published free by Carrier at https://brandportal.carrier.com/asset/a3ef0f71-85f8-4053-9dd3-eaafdf78559c/EN7519369-06_IOM_Control_02_2023_CCU-Controller.pdf.

What are the minimum BACnet points to integrate the Carrier CCU Controller close control unit (Modbus to BACnet gateway option)?

Start with BV 13 OnOff (Unit on/off command, 1 = on); AV 7 CoolSetpt (Cooling temperature setpoint); AV 4 HeatSetpt (Heating temperature setpoint); AV 5 DeshuSetpt (Dehumidification humidity setpoint); AV 6 HumidSetpt (Humidification humidity setpoint); BV 14 VentilSouf (Supply fan running); AV 1 TempRegulee (Controlled (room/return) temperature); AV 15 HygroRegulee (Controlled humidity); BV 28 DefImportant (Critical fault summary); BV 27 DefSimple (Non-critical fault summary).

How do I enable BMS control of the Carrier CCU Controller close control unit (Modbus to BACnet gateway option)?

P706 must be set to Remote on the controller for gateway (BMS) control.

How do I check these points on the real CCU Controller close control unit (Modbus to BACnet gateway option)?

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 Carrier BACnet points lists

Source: Control Manual, Close control units, Carrier CCU Controller · EN7519369-06 · rev. 2023-02. Object names, instances and units are reproduced as published; descriptions are our own.