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Scroll chiller / heat pump / condensing unit (via SC-EQ card) · BACnet points list

York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) BACnet points list

Updated 4 November 2026

Short answer

This SC-EQ list covers the YORK scroll product family: air- and water-cooled scroll chillers, heat pumps and condensing units. The SC-EQ card serves BACnet MS/TP (or Modbus RTU / N2). The BAS can start/stop the unit or each system, write setpoints, range, load limit stage and heat pump mode. Several objects change meaning with the unit type (condensing unit, heat pump, YCWL, EEV, refrigerant), so the sheet prints more than one row for them.

This page lists 85 BACnet objects for the York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) — 7 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from York’s own free documentation, linked below.

Manufacturer
York
Model
Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)
Equipment
Scroll chiller / heat pump / condensing unit (via SC-EQ card)
Equipment type
Chillers
BACnet objects
85 (7 writable)
Transport
BACnet MS/TP
Firmware
SC-EQ software 3.5.0.11
Default device instance
5000 + MAC address
Also known as
YORK scroll chiller, YORK scroll heat pump, YORK condensing unit, YCWL, SC-EQ, SE-SCC1001-1
Source document
Scroll SC-EQ BAS Points List · rev. Rev 2.4, 2021-01-11
Download CSV 85 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 York’s current documentation and the live device before use. Not official York information. Terms of use.

BMS integration notes: York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)

Integration in brief

Put the unit in remote control (BV 21 reads Remote), then start/stop it with BV 1 and write the remote setpoint (AV 1) and, if needed, the load limit stage (AV 2). Read the leaving chilled liquid temperature, compressor run status, the per-system alarms (BV 5, BV 6) and the per-system operational and fault codes.

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 1REM START STOP CMD / SYS1 REM START STOP CMDRemote start/stop (1 = run)Command
AV 1REMOTE SETPOINT / SYS 1 REM SETPRemote cooling setpoint (99 = auto)Command
AV 2REM LOAD LIMIT STAGERemote load limit stage (0, 1, 2)Command
MV 1SYS 1 OPERATIONAL CODESys 1 operating stateRead
BV 9SYS 1 COMP 1 RUNSys 1 compressor 1 runningRead
BV 21LOCAL REMOTE CONTROL MODEMust read Remote (1) for BMS controlRead
AV 5LEAVING CHILLED LIQ TEMPLeaving chilled liquid temperatureRead
BV 5SYS 1 ALARMSystem 1 alarmRead
BV 6SYS 2 ALARMSystem 2 alarmRead
MV 2SYS 1 FAULT CODESys 1 fault/inhibit code (1 = no fault)Read

Enable & remote start

BV 21 shows Local or Remote control mode. The points list gives no point to change it and no write-enable point. AV 4 selects panel, cool or heat on heat pump units.

Network setup

Watch out for

York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) 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.

85 of 85 shown
Type
AnalogBinaryMulti-state
Access
Show
York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) BACnet Points List
DescriptionStates
AVmin1REMOTE SETPOINT / SYS 1 REM SETPRemote setpoint, 99 = auto (°F); or Sys 1 remote setpoint (PSIG)°F / PSIGCommand
AVmin2REM LOAD LIMIT STAGERemote load limit stage (0, 1 or 2)Command
AV3REM COOLING RANGE / REM HEATING SETP / SYS 2 REM SETPRemote cooling range, heating setpoint (999 = auto) or Sys 2 setpoint°F (diff) / °F / PSIGCommand
AV4REM HEATPUMP MODERemote heat pump modeCommand0=Panel, 1=Cool, 2=Heat
BVmin1REM START STOP CMD / SYS1 REM START STOP CMDRemote start/stop, unit or Sys 1 (sheet prints both)Command0=Stop, 1=Run
BV2SYS2 REM START STOP CMDSys 2 Remote Start / Stop CommandCommand0=Stop, 1=Run
BV4HISTORY REQUESTHistory buffer 1 request (live / history data)Command0=Live Data, 1=History 1 Data
AVmin5LEAVING CHILLED LIQ TEMPLeaving Chilled Liquid Temp°FRead
AV6ENTERING CHILLED LIQ TEMPEntering Chilled Liquid Temp°FRead
AV7LEAVING LIQ TEMP HOTLeaving Liquid Temp Hot (YCWL)°FRead
AV8DISCHARGE AIR TEMP / RETURN LIQ TEMP HOTDischarge air temp (condensing unit) or return hot liquid temp (YCWL)°FRead
AV9SYS 1 SUCT TEMPSys 1 Suction Temperature (If EEV or R-410a)°FRead
AV10OUTSIDE AMBIENT AIR TEMPOutside Ambient Air Temperature°FRead
AV11SYS 1 SUCT SUPERHEATSys 1 Suction Superheat (EEV units)°F (diff)Read
AV12SYS 1 RUN TIMESys 1 run time, secondsSecRead
AV13SYS 1 SUCT PRESSSys 1 Suction PressurePSIGRead
AV14SYS 1 DISCH PRESSSys 1 Discharge PressurePSIGRead
AV15SYS 1 SUCT TEMP COND UNIT / SYS 1 COOLER INLET REF TEMPSys 1 suction temp (condensing unit) or cooler inlet refrigerant temp (R-407c)°FRead
AV16SYS 1 DEFROST TEMPSys 1 Defrost Temperature (heat pump)°FRead
AV17SYS 1 EEV OUTPUT PCTSys 1 EEV Output Percent (EEV units)%Read
AV18SYS 1 ANTI RECYCLE TIMERSys 1 anti-recycle timer, secondsRead
AV19ANTI COINCIDENT TIMERAnti-coincident timer, secondsRead
AV20SYS 2 SUCT TEMPSys 2 Suction Temperature°FRead
AV21SYS 2 RUN TIMESys 2 run time, secondsSecRead
AV22SYS 2 SUCT PRESSSys 2 Suction PressurePSIGRead
AV23SYS 2 DISCH PRESSSys 2 Discharge PressurePSIGRead
AV24SYS 2 SUCT TEMP COND UNIT / SYS 2 COOLER INLET REF TEMPSys 2 suction temp (condensing unit) or cooler inlet refrigerant temp (R-407c)°FRead
AV25SYS 2 DEFROST TEMPSys 2 Defrost Temperature°FRead
AV26SYS 2 SUCT SUPERHEATSys 2 Suction Superheat°F (diff)Read
AV27SYS 2 ANTI RECYCLE TIMERSys 2 anti-recycle timer, secondsRead
AV28SYS 2 EEV OUTPUT PCTSys 2 EEV Output Percent%Read
AV29NUMBER COMPRESSORSNumber of CompressorsRead
BVmin5SYS 1 ALARMSys 1 AlarmRead0=No Alarm, 1=Alarm Active
BVmin6SYS 2 ALARMSys 2 AlarmRead0=No Alarm, 1=Alarm Active
BV7EVAPORATOR HEATER STATUSEvaporator Heater StatusRead0=Off, 1=On
BV8EVAPORATOR PUMP STATUSEvaporator Pump StatusRead0=Off, 1=On
BVmin9SYS 1 COMP 1 RUNSys 1 Comp 1 RunRead0=Off, 1=On
BV10SYS 2 COMP 1 RUNSys 2 Comp 1 RunRead0=Off, 1=On
BV11SYS 1 LIQUID LINE SOL VALVE / SYS 1 MODE SOL VALVESys 1 liquid line solenoid, or mode solenoid on heat pumpsRead0=Off, 1=On
BV12SYS 1 HOT GAS BYPASS VALVESys 1 Hot Gas Bypass Valve (If Not Heatpump)Read0=Off, 1=On
BV13SYS 1 COMP 2 RUNSys 1 Comp 2 RunRead0=Off, 1=On
BV14SYS 2 COMP 2 RUNSys 2 Comp 2 RunRead0=Off, 1=On
BV15SYS 2 LIQUID LINE SOL VALVE / SYS 2 MODE SOL VALVESys 2 liquid line solenoid, or mode solenoid on heat pumpsRead0=Off, 1=On
BV16LEAD SYSTEM NUMBERLead System NumberRead0=Sys1, 1=Sys2
BV17SYS 1 COMP 3 RUNSys 1 Comp 3 RunRead0=Off, 1=On
BV18SYS 2 COMP 3 RUNSys 2 Comp 3 RunRead0=Off, 1=On
BV19COOLING TYPECooling TypeRead0=Water, 1=Glycol
BV20AMBIENT CONTROL MODEAmbient Control ModeRead0=Standard Ambient, 1=Low Ambient
BVmin21LOCAL REMOTE CONTROL MODELocal Remote Control ModeRead0=Local, 1=Remote
BV22DISPLAY UNITSDisplay UnitsRead0=Imperial, 1=SI
BV23LEAD LAG CONTROL MODELead Lag Control ModeRead0=Manual, 1=Auto
BV24SYS 2 HOT GAS BYPASS VALVESys 2 Hot Gas Bypass ValveRead0=Off, 1=On
MVmin1SYS 1 OPERATIONAL CODESys 1 Operational CodeRead1=No Abnormal Condition, 2=Unit Switch Off, 3=System Switch Off, 4=Lockout, 5=Unit Fault, 6=System Fault, 7=Remote Shutdown, 8=Daily Schedule Shutdown, 9=No Run Permissive, 10=No Cool Load, 11=Anti-Coincidence Timer Active, 12=Anti-Recycle Timer Active, 13=Manual Override, 14=Suction Limiting, 15=Discharge Limiting, 16=Current Limiting, 17=Load Limiting, 18=Compressor(s) Running, 19=Heat pump Load Limiting, 20=Pumping Down
AV501SYS 1 OPERATIONAL CODE AVSys 1 Operational Code AVRead0=No Abnormal Condition, 1=Unit Switch Off, 2=System Switch Off, 3=Lockout, 4=Unit Fault, 5=System Fault, 6=Remote Shutdown, 7=Daily Schedule Shutdown, 8=No Run Permissive, 9=No Cool Load, 10=Anti-Coincidence Timer Active, 11=Anti-Recycle Timer Active, 12=Manual Override, 13=Suction Limiting, 14=Discharge Limiting, 15=Current Limiting, 16=Load Limiting, 17=Compressor(s) Running, 18=Heat pump Load Limiting, 19=Pumping Down
MVmin2SYS 1 FAULT CODESys 1 Fault CodeRead1=No Fault, 2=VAC Under Voltage, 3=Low Ambient Temperature, 4=High Ambient Temperature, 5=Low Leaving Chilled Liquid Temp, 6=High Discharge Pressure, 7=High Differential Oil Pressure, 8=Low Suction Pressure, 9=High Motor Current, 10=LLSV Not On, 11=Low Battery Warning, 12=High Oil Temperature, 13=High Discharge Temperature, 14=Improper Phase Rotation, 15=Low Motor Current / MP / HPCO, 16=Motor Current Unbalanced, 17=Low Differential Oil Pressure, 18=Ground Fault, 19=MP/HPCO Fault, 20=Low Evaporator Temperature, 21=Incorrect Refrigerant Programmed, 22=Power Failure, Manual Reset Required, 23=Unit Motor Current, 24=Low Superheat, 25=Sensor Fault, 26=Discharge Inhibit, 27=MP/HPCO Inhibit, 28=Pump Trip, 29=Pump Fail Make Flow, 30=High Ambient Temperature, 31=Anti-Vacuum Low Pressure Cutout, 32=Flow Switch Open, 33=Leaving Chilled Liquid Temperature Sensor Fault
AV502SYS 1 FAULT CODE AVSys 1 Fault Code AVRead0=No Fault, 1=VAC Under Voltage, 2=Low Ambient Temperature, 3=High Ambient Temperature, 4=Low Leaving Chilled Liquid Temp, 5=High Discharge Pressure, 6=High Differential Oil Pressure, 7=Low Suction Pressure, 8=High Motor Current, 9=LLSV Not On, 10=Low Battery Warning, 11=High Oil Temperature, 12=High Discharge Temperature, 13=Improper Phase Rotation, 14=Low Motor Current / MP / HPCO, 15=Motor Current Unbalanced, 16=Low Differential Oil Pressure, 17=Ground Fault, 18=MP/HPCO Fault, 19=Low Evaporator Temperature, 20=Incorrect Refrigerant Programmed, 21=Power Failure, Manual Reset Required, 22=Unit Motor Current, 23=Low Superheat, 24=Sensor Fault, 25=Discharge Inhibit, 26=MP/HPCO Inhibit, 27=Pump Trip, 28=Pump Fail Make Flow, 29=High Ambient Temperature, 30=Anti-Vacuum Low Pressure Cutout, 31=Flow Switch Open, 32=Leaving Chilled Liquid Temperature Sensor Fault
MV3SYS 2 OPERATIONAL CODESys 2 Operational CodeRead1=No Abnormal Condition, 2=Unit Switch Off, 3=System Switch Off, 4=Lockout, 5=Unit Fault, 6=System Fault, 7=Remote Shutdown, 8=Daily Schedule Shutdown, 9=No Run Permissive, 10=No Cool Load, 11=Anti-Coincidence Timer Active, 12=Anti-Recycle Timer Active, 13=Manual Override, 14=Suction Limiting, 15=Discharge Limiting, 16=Current Limiting, 17=Load Limiting, 18=Compressor(s) Running, 19=Heat pump Load Limiting, 20=Pumping Down
AV503SYS 2 OPERATIONAL CODE AVSys 2 Operational Code AVRead0=No Abnormal Condition, 1=Unit Switch Off, 2=System Switch Off, 3=Lockout, 4=Unit Fault, 5=System Fault, 6=Remote Shutdown, 7=Daily Schedule Shutdown, 8=No Run Permissive, 9=No Cool Load, 10=Anti-Coincidence Timer Active, 11=Anti-Recycle Timer Active, 12=Manual Override, 13=Suction Limiting, 14=Discharge Limiting, 15=Current Limiting, 16=Load Limiting, 17=Compressor(s) Running, 18=Heat pump Load Limiting, 19=Pumping Down
MV4SYS 2 FAULT CODESys 2 Fault CodeRead1=No Fault, 2=VAC Under Voltage, 3=Low Ambient Temperature, 4=High Ambient Temperature, 5=Low Leaving Chilled Liquid Temp, 6=High Discharge Pressure, 7=High Differential Oil Pressure, 8=Low Suction Pressure, 9=High Motor Current, 10=LLSV Not On, 11=Low Battery Warning, 12=High Oil Temperature, 13=High Discharge Temperature, 14=Improper Phase Rotation, 15=Low Motor Current / MP / HPCO, 16=Motor Current Unbalanced, 17=Low Differential Oil Pressure, 18=Ground Fault, 19=MP/HPCO Fault, 20=Low Evaporator Temperature, 21=Incorrect Refrigerant Programmed, 22=Power Failure, Manual Reset Required, 23=Unit Motor Current, 24=Low Superheat, 25=Sensor Fault, 26=Discharge Inhibit, 27=MP/HPCO Inhibit, 28=Pump Trip, 29=Pump Fail Make Flow, 30=High Ambient Temperature, 31=Anti-Vacuum Low Pressure Cutout, 32=Flow Switch Open, 33=Leaving Chilled Liquid Temperature Sensor Fault
AV504SYS 2 FAULT CODE AVSys 2 Fault Code AVRead0=No Fault, 1=VAC Under Voltage, 2=Low Ambient Temperature, 3=High Ambient Temperature, 4=Low Leaving Chilled Liquid Temp, 5=High Discharge Pressure, 6=High Differential Oil Pressure, 7=Low Suction Pressure, 8=High Motor Current, 9=LLSV Not On, 10=Low Battery Warning, 11=High Oil Temperature, 12=High Discharge Temperature, 13=Improper Phase Rotation, 14=Low Motor Current / MP / HPCO, 15=Motor Current Unbalanced, 16=Low Differential Oil Pressure, 17=Ground Fault, 18=MP/HPCO Fault, 19=Low Evaporator Temperature, 20=Incorrect Refrigerant Programmed, 21=Power Failure, Manual Reset Required, 22=Unit Motor Current, 23=Low Superheat, 24=Sensor Fault, 25=Discharge Inhibit, 26=MP/HPCO Inhibit, 27=Pump Trip, 28=Pump Fail Make Flow, 29=High Ambient Temperature, 30=Anti-Vacuum Low Pressure Cutout, 31=Flow Switch Open, 32=Leaving Chilled Liquid Temperature Sensor Fault
AV406SYS 1 COND FAN STAGES RUNSys 1 Condenser Fan StageRead
AV408SYS 2 COND FAN STAGES RUNSys 2 Condenser Fan StageRead
MV10UNIT CONTROL MODEUnit control modeRead0=Leaving Water, 1=Return Water, 2=Discharge Air, 3=Suction Press, 4=Heatpump Cooling, 5=Heatpump Heating
AV505UNIT CONTROL MODE AVUnit control mode (analog copy)Read0=Leaving Water, 1=Return Water, 2=Discharge Air, 3=Suction Press, 4=Heatpump Cooling, 5=Heatpump Heating
AV30ANTI RECYCLE TIME PROGAnti-Recycle Time ProgrammedRead
AV31LOW LEAVING CHILL LIQ CUTOUTLow Leaving Chilled Liquid Temp Cutout°FRead
AV32LOW AMBIENT TEMP CUTOUTLow Ambient Temp Cutout°FRead
AV33LOW SUCT PRESS CUTOUT HEATINGLow Suction Press Cutout Heating (heat pump)PSIGRead
AV34LOW SUCT PRESS CUTOUT COOLINGLow Suction Press Cutout CoolingPSIGRead
AV35HIGH DISCH PRESS CUTOUTHigh Discharge Press CutoutPSIGRead
AV36COOLING SETPOINT / SYS 1 COOLING SETPOINTCooling setpoint, or Sys 1 cooling setpoint (PSIG, SP control)°F / PSIGRead
AV37COOLING RANGE / SYS 1 COOLING RANGECooling range, or Sys 1 cooling range (PSIG, SP control)°F (diff) / PSIGRead
AV38SYS 2 COOLING SETPOINT / HEATING SETPOINTSys 2 cooling setpoint (SP control) or heating setpoint (HP)PSIG / °FRead
AV39SYS 2 COOLING RANGE / HEATING RANGESys 2 cooling range (SP control) or heating range (heat pump)PSIG / °F (diff)Read
AV40SYS 1 DISCH TEMPSys 1 Discharge Temperature (EEV units)°FRead
AV41SYS 1 DISCH SUPERHEATSys 1 Discharge Superheat (EEV units)°F (diff)Read
AV42SYS 2 DISCH TEMPSys 2 Discharge Temperature°FRead
AV43SYS 2 DISCH SUPERHEATSys 2 Discharge Superheat°F (diff)Read
BV25BIVALENT HT SOURCE TRAY HTBivalent Heat Source/Tray Heater (heat pump)Read0=Off, 1=On
AV116SYS 1 COMP 1 RUN HOURSSys 1 Comp 1 Run HoursHrRead
AV117SYS 1 COMP 2 RUN HOURSSys 1 Comp 2 Run HoursHrRead
AV118SYS 1 COMP 3 RUN HOURSSys 1 Comp 3 Run HoursHrRead
AV125SYS 2 COMP 1 RUN HOURSSys 2 Comp 1 Run HoursHrRead
AV126SYS 2 COMP 2 RUN HOURSSys 2 Comp 2 Run HoursHrRead
AV127SYS 2 COMP 3 RUN HOURSSys 2 Comp 3 Run HoursHrRead
Object ID lookup: York YORK Scroll (SC-EQ) 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 Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) 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 York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)

How many BACnet points does the York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) have?

This list has 85 BACnet objects: 56 analog values, 24 binary values, 5 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) BACnet points are writable?

7 of the 85 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. The source has no read/write column, so this is inferred from object type.

Where is the official York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ) BACnet documentation?

The source is Scroll SC-EQ BAS Points List, revision Rev 2.4, 2021-01-11, published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/47mW1GA_AXbFLIz2QICYeQ/content.

What are the minimum BACnet points to integrate the York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)?

Start with BV 1 REM START STOP CMD / SYS1 REM START STOP CMD (Remote start/stop (1 = run)); AV 1 REMOTE SETPOINT / SYS 1 REM SETP (Remote cooling setpoint (99 = auto)); AV 2 REM LOAD LIMIT STAGE (Remote load limit stage (0, 1, 2)); MV 1 SYS 1 OPERATIONAL CODE (Sys 1 operating state); BV 9 SYS 1 COMP 1 RUN (Sys 1 compressor 1 running); BV 21 LOCAL REMOTE CONTROL MODE (Must read Remote (1) for BMS control); AV 5 LEAVING CHILLED LIQ TEMP (Leaving chilled liquid temperature); BV 5 SYS 1 ALARM (System 1 alarm); BV 6 SYS 2 ALARM (System 2 alarm); MV 2 SYS 1 FAULT CODE (Sys 1 fault/inhibit code (1 = no fault)).

How do I enable BMS control of the York Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)?

BV 21 shows Local or Remote control mode. The points list gives no point to change it and no write-enable point. AV 4 selects panel, cool or heat on heat pump units.

How do I check these points on the real Scroll Chiller / Heat Pump / Condensing Unit (SC-EQ)?

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 York BACnet points lists

Source: Scroll SC-EQ BAS Points List · rev. Rev 2.4, 2021-01-11. Object names, instances and units are reproduced as published; descriptions are our own.