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Self-contained unit controller · BACnet points list

Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) BACnet points list

Updated 7 November 2026

Short answer

The SCU Open program runs on a UC Open XP controller and talks BACnet MS/TP or ARC156 on its EIA-485 port. The points list has 168 objects: setpoints and configuration as AVs, alarms and enables as BVs, and a few multistate values such as BAS On/Off and System Mode. It covers single-zone (space temperature) and VAV (supply air temperature and duct static) operation, plus water economizer, hot gas reheat and auxiliary hot water heat options.

This page lists 168 BACnet objects for the Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) — 80 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
50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)
Equipment
Self-contained unit controller
Equipment type
Rooftop units, AHUs & DOAS
BACnet objects
168 (80 writable)
Transport
BACnet MS/TP
Firmware
Not stated
Also known as
50BV, 50BVT, 50BVV, 50BVQ, 50VQP, 50BVW, SCU Open, UC Open XP, 50BV-SCU-3T, water-cooled self-contained unit
Source document
50BVT, 50BVV, 50BVQ 024-034, 50VQP 210-360 (Cooling Only), and 50BVW with SCU Open Controller - Controls, Start-Up, Operation and Troubleshooting (Appendix B, BACnet Points List) · 50BV-SCU-3T · rev. 2025-07
Download CSV 168 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 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)

Integration in brief

Address the UC Open XP with its two rotary switches, set the MS/TP baud rate with the DIP switches, then command occupancy through BAS On/Off (MV 1001) and read System Mode, temperatures and alarms. Setpoints and enables are writable AVs and BVs.

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
MV 1001keypad_ovrdeBAS occupancy: 1=Inactive (schedule), 2=Occ, 3=UnoccWrite
AV 3001occ_cl_stptOccupied cooling setpointWrite
AV 3002occ_ht_stptOccupied heating setpointWrite
AV 3029sat_cl_stptSupply air setpoint (VAV units)Write
MV 2002run_statusSystem mode (cooling, heating, economize, shutdown...)Read
BV 2008occ_statusCurrent occupancy statusRead
AV 2035ctrl_tempControlling temperatureRead
AV 1008sa_tempSupply air temperatureRead
BV 1003sfan_statusSupply fan statusRead
BV 7013comp_alarmCompressor status alarmRead

Enable & remote start

BAS On/Off (MV 1001) sets occupancy from the network: state 1 (default, Inactive) follows the schedule, 2 forces occupied, 3 forces unoccupied. Forcing occupied or unoccupied disables Optimal Start. For BAS scheduling through BAS On/Off, the local Occupancy Schedules must be set to Disable.

Sensors & values from the BMS

The controller can take space temperature, setpoint adjustment, RH, CO2, outdoor air temperature, demand level and occupancy from the network (System Space Temperature AV 1902, System Setpoint Adjustment AV 1913, System Supply Air Temperature AV 1906 and the System network points). A BACnet network occupancy input can also be configured, but local occupancy schedules must be disabled to use it.

Network setup

Watch out for

Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) 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.

168 of 168 shown
Type
AnalogBinaryMulti-state
Access
Show
Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) BACnet Points List
DescriptionStates
AV2608link_satAir Source Supply Air Temp°FRead
BV7030air_linkage_failAirside LinkageRead
BV2601a_link_statusAirside LinkageRead
AV2702link_hwtAuxiliary Heat Boiler Water Temp°FRead
AV3014aux_heat_stptAuxiliary Heat Control Setpoint°FRead
AV2021aux_heat_outputAuxiliary Heat Output%Read
BV2703hw_pumpAuxilary Heat HW Pump StatusRead
BV81004aux_heat_testAuxilary Heat TestWrite
BV7024co2_failCO2 Sensor FailureRead
BV7026comp1_failCompressor 1 FailureRead
AV2100comp1_rntmCompressor 1 RuntimehrRead
BV7014comp1_rntm_alarmCompressor 1 Runtime AlarmRead
AV83106comp1_service_hrsCompressor 1 Service Alarm TimerhrWrite
BV7152comp1_statusCompressor 1 StatusRead
BV7028comp2_failCompressor 2 FailureRead
AV2101comp2_rntmCompressor 2 RuntimehrRead
BV7015comp2_rntm_alarmCompressor 2 Runtime AlarmRead
AV83107comp2_service_hrsCompressor 2 Service Alarm TimerhrWrite
BV7153comp2_statusCompressor 2 StatusRead
BV7032comp3_failCompressor 3 FailureRead
AV2102comp3_rntmCompressor 3 RuntimehrRead
BV7016comp3_rntm_alarmCompressor 3 Runtime AlarmRead
AV83108comp3_service_hrsCompressor 3 Service Alarm TimerhrWrite
BV7156comp3_statusCompressor 3 StatusRead
BV7033comp4_failCompressor 4 FailureRead
AV2103comp4_rntmCompressor 4 RuntimehrRead
BV7017comp4_rntm_alarmCompressor 4 Runtime AlarmRead
AV83109comp4_service_hrsCompressor 4 Service Alarm TimerhrWrite
BV7159comp4_statusCompressor 4 StatusRead
AV5001comp_capCompressor Capacity%Read
BVmin7013comp_alarmCompressor Status AlarmRead
BV81002comp_testCompressor TestWrite
BV7027cwt_alarmCond. Water TemperatureRead
BV7025cwv_failCondenser Valve FailureRead
BV7067ctrl_temp_failControl Temp Sensor FailureRead
AVmin2035ctrl_tempControlling Temperature°FRead
BV1011cl_enableCool EnableWrite
AV9002oat_cl_lockoutCooling Lockout Temperature°FWrite
AV3031sa_static_stpt_valueCurrent Static Pressure Setpointin H2ORead
BV99009cw_dp_enableCW Differential Pressure SwitchWrite
BV7089dp_switchCW Flow SwitchRead
BV7090cw_statusCW Valve StatusRead
AV2022oa_dpr_posDamper Output%Read
BV2006dehumDehumidificationRead
BV81005econ_testEconomizer TestWrite
AV3005eff_cl_stptEffective Cool Setpoint°FRead
AV3006eff_ht_stptEffective Heat Setpoint°FRead
AV2033eff_sat_setpt_valueEffective Supply Air Temp Setpoint°FRead
BV91000fac_test_enableFactory TestWrite
AV9024fan_delay_offFan Off DelaysecondsWrite
AV9025fan_delay_onFan On DelaysecondsWrite
BV81001fan_testFan TestWrite
BV7019filter_alarmFilterRead
AV2015filter_rntmFilter RuntimehrRead
AV2019filter_service_hrsFilter Service Alarm TimerhrWrite
BV1005filter_statusFilter Status InputRead
BV7007fire_alarmFire / Smoke ShutdownRead
BV99002rh_enableHardwired Humidity SensorWrite
BV1012ht_enableHeat EnableWrite
AV9003oat_ht_lockoutHeating Lockout Temperature°FWrite
AV2026hgrh_outputHGRH Output%Read
BV81003dehum_testHGRH TestWrite
BV7060sp_hi_alarmHi Static Pressure ShutdownRead
BV7011spt_hi_alarmHigh Space TemperatureRead
BV99004hgrh_enableHot Gas ReheatWrite
BV91010reheat_typeHot Water CoilWrite
BV7005iaq_alarmIndoor Air QualityRead
AV1009iaqIndoor Air Quality CO2ppmRead
AV1017cwl_tempLeaving Cond. Water Temp°FRead
AV2024loop_requestLoop Pump RequestRead
BV2702loop_pumpLoop Pump StatusRead
BV7012spt_lo_alarmLow Space TemperatureRead
BV7062sp_low_alarmLow Static Pressure ShutdownRead
AV3026max_vfd_spdMaximum VFD Output%Write
AV83004sat_ht_maxMaximum Heating SAT°FWrite
AV3027min_vfd_spdMinimum VFD Output%Write
AV83003sat_cl_minMinimum Cooling SAT°FWrite
BVmin2008occ_statusOccupancy StatusRead
BV2031occ_heatOccupied HeatingWrite
AV9028occ_ovr_delayOccupied Override DelayminWrite
AV3011occ_dehum_stptOccupied Relative Humidity Setpoint%rhWrite
BV81007dpr_openOpen Vent Damper 100%Write
AV9026optm_startOptimal StarthrWrite
BV7029oat_failOutdoor Air Temp. Sensor FailureRead
AV1003oa_tempOutdoor Air Temperature°FRead
BV7006ovrld_alarmOverload ShutdownRead
AV2016ovrde_timeOverride Time RemainingminRead
AV9007start_delayPower Fail Restart DelaysecondsWrite
BV81006dpr_preloadPreload OA Damper PositionWrite
BV7514comp1_rntm_clrReset Comp 1 Runtime AlarmWrite
BV7515comp2_rntm_clrReset Comp 2 Runtime AlarmWrite
BV7516comp3_rntm_clrReset Comp 3 Runtime AlarmWrite
BV7517comp4_rntm_clrReset Comp 4 Runtime AlarmWrite
BV1908lsl_resetReset Low Static ShutdownWrite
AV9040sat_cl_stpt_reset_maxReset Maximum Limitdelta °FWrite
AV9041sat_cl_stpt_resetReset RatioWrite
BV7518filter_rntm_clrReset Runtime Filter AlarmWrite
BV7021loc_rat_sensor_failReturn Air Temp Sensor FailureRead
AV1010ra_tempReturn Air Temperature°FRead
BV7035rat_alarmReturn Air TemperatureRead
BV99005rev_vlvReversing ValveWrite
AVmin3001occ_cl_stptOccupied cooling setpoint°FWrite
AVmin3002occ_ht_stptOccupied heating setpoint°FWrite
AV3003unocc_cl_stptUnoccupied cooling setpoint°FWrite
AV3004unocc_ht_stptUnoccupied heating setpoint°FWrite
AV1006stpt_adjSetpoint Adjustmentdelta °FRead
BV1013stpt_adj_enableSetpoint AdjustmentWrite
AV9015stpt_adj_rangeSetpoint Adjustment Rangedelta °FWrite
BV81000test_enableService TestWrite
BV9001shutdownShutdownWrite
BV1004smk_detectSmoke Detector InputRead
BV2701cw_link_statusSource Water LinkageRead
BV7031cond_water_linkage_failSource Water LinkageRead
AV69lo_sp_limitSP Low Limit Trip Setpoint (Shutdown)in H2OWrite
AV1011space_rhSpace Relative Humidity%rhRead
BV7018sprh_hi_alarmSpace Relative HumidityRead
AV2007space_tempSpace Temperature°FRead
AV2028static_pressStatic Pressurein H2ORead
BV7061sp_failStatic Pressure Sensor FailureRead
AV3030sa_static_stptStatic Pressure Setpointin H2OWrite
AVmin3029sat_cl_stptSupply Air Setpoint°FWrite
BV9004sa_reset_enSupply Air Temp ResetWrite
BV7020sat_sensor_failSupply Air Temp. Sensor FailureRead
AVmin1008sa_tempSupply Air Temperature°FRead
BV7004sat_alarmSupply Air TemperatureRead
BV7008sfan_fail_alarmSupply Fan FailureRead
BVmin1003sfan_statusSupply Fan StatusRead
AV2027vfd_outputSupply Fan VFD Output%Read
AV9006cool_demand_levelSystem Cooling Demand LevelRead
AV9036heat_demand_levelSystem Heating Demand LevelRead
AV1901system_oatSystem Outdoor Air Temperature°FWrite
AV1920system_ratSystem Return Air Temperature°FWrite
AV1913system_stpt_adjSystem Setpoint Adjustment°FWrite
AV1903system_iaqSystem Space IAQppmWrite
AV1904system_rhSystem Space RH%Write
AV1902system_sptSystem Space Temperature°FWrite
AV1906system_satSystem Supply Air Temperature°FWrite
AV92001ao_oneTest AO-1%Write
AV92002ao_twoTest AO-2%Write
AV92003ao_threeTest AO-3%Write
BV91001do_oneTest DO-1Write
BV91002do_twoTest DO-2Write
BV91003do_threeTest DO-3Write
BV91004do_fourTest DO-4Write
BV91005do_fiveTest DO-5Write
BV91006do_sixTest DO-6Write
AV92004ao_one_threeTest Expander 1 AO-3%Write
BV91007do_one_oneTest Expander 1 DO-1Write
BV91008do_one_twoTest Expander 1 DO-2Write
BV7022upm1_almUnit Protection Module 1 AlarmRead
BV7023upm2_almUnit Protection Module 2 AlarmRead
BV99001unit_typeUnit TypeWrite
AV3012unocc_dehum_stptUnoccupied Relative Humidity Setpoint%rhWrite
AV4005econ_minVent Damper Pos / DCV Min Pos%Write
AV3015h2o_econ_ctrl_stptWater Economizer Control Setpoint°FRead
AV2023h2o_econ_outputWater Economizer Output%Read
AV2701link_cwtWater Loop Temp°FRead
BV7055zs_config_failZS Sensor ConfigurationRead
BV7051zst_sensor_failZS Temperature Sensor FailureRead
MV2005link_ahu_modeAir Source ModeRead1=OFF, 2=WARMUP, 3=HEAT, 4=COOLING, 5=FREECOOL, 6=PRESSURE, 7=EVAC, 8=VENT
MVmin1001keypad_ovrdeBAS On / OffWrite1=Inactive, 2=Occupied, 3=Unoccupied
MV2013ctrl_temp_srcControl Temp SourceRead1=Sensor Failure, 2=Space, 3=Return Air, 4=Linkage Zone, 5=Locked Value
MV91001h2o_econ_typeEntering Air Water EconomizerWrite1=None, 2=2-Pos
MV2009start_typeOptimal Start TypeWrite1=None, 2=Temp Compensated, 3=Learning Adaptive
MV9033sp_reset_dmd_lvlSP Reset Demand LevelWrite1=Not Active, 2=Cool Dmd Lvl 1, 3=Cool Dmd Lvl 2, 4=Cool Dmd Lvl 3
MV2004fan_runSupply Fan SpeedRead1=Off, 2=Low, 3=Medium, 4=High, 5=On
MVmin2002run_statusSystem ModeRead1=OFF, 2=Fan Only, 3=Economize, 4=Cooling, 5=Heating, 6=Cont Fan, 7=Test, 8=Start Delay, 9=Dehumidify, 10=Fire Shutdown, 11=Shutdown, 12=IAQ Override
MV91002dpr_typeVentilation Damper TypeWrite1=None, 2=2-Pos, 3=DCV
Object ID lookup: Carrier 50BV SCU Open 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 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) 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 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)

How many BACnet points does the Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) have?

This list has 168 BACnet objects: 74 analog values, 85 binary values, 9 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) BACnet points are writable?

80 of the 168 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 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP) BACnet documentation?

The source is 50BVT, 50BVV, 50BVQ 024-034, 50VQP 210-360 (Cooling Only), and 50BVW with SCU Open Controller - Controls, Start-Up, Operation and Troubleshooting (Appendix B, BACnet Points List) (50BV-SCU-3T), revision 2025-07, published free by Carrier at https://brandportal.carrier.com/asset/da433b3f-04c2-4303-b317-269c7e85b240/50BV-SCU-3T.pdf.

What are the minimum BACnet points to integrate the Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)?

Start with MV 1001 keypad_ovrde (BAS occupancy: 1=Inactive (schedule), 2=Occ, 3=Unocc); AV 3001 occ_cl_stpt (Occupied cooling setpoint); AV 3002 occ_ht_stpt (Occupied heating setpoint); AV 3029 sat_cl_stpt (Supply air setpoint (VAV units)); MV 2002 run_status (System mode (cooling, heating, economize, shutdown...)); BV 2008 occ_status (Current occupancy status); AV 2035 ctrl_temp (Controlling temperature); AV 1008 sa_temp (Supply air temperature); BV 1003 sfan_status (Supply fan status); BV 7013 comp_alarm (Compressor status alarm).

How do I enable BMS control of the Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)?

BAS On/Off (MV 1001) sets occupancy from the network: state 1 (default, Inactive) follows the schedule, 2 forces occupied, 3 forces unoccupied. Forcing occupied or unoccupied disables Optimal Start. For BAS scheduling through BAS On/Off, the local Occupancy Schedules must be set to Disable.

Can the BMS supply sensor values to the Carrier 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)?

The controller can take space temperature, setpoint adjustment, RH, CO2, outdoor air temperature, demand level and occupancy from the network (System Space Temperature AV 1902, System Setpoint Adjustment AV 1913, System Supply Air Temperature AV 1906 and the System network points). A BACnet network occupancy input can also be configured, but local occupancy schedules must be disabled to use it.

How do I check these points on the real 50BVT/50BVV/50BVQ/50VQP/50BVW Indoor Self-Contained Units (SCU Open, UC Open XP)?

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: 50BVT, 50BVV, 50BVQ 024-034, 50VQP 210-360 (Cooling Only), and 50BVW with SCU Open Controller - Controls, Start-Up, Operation and Troubleshooting (Appendix B, BACnet Points List) · 50BV-SCU-3T · rev. 2025-07. Object names, instances and units are reproduced as published; descriptions are our own.