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Water-cooled centrifugal chiller (via SC-EQ card) · BACnet points list
York YT Centrifugal Chiller (SC-EQ) BACnet points list
Updated 28 October 2026
YORK by Johnson Controls YT centrifugal chillers reach a BAS through the SC-EQ communication card, which serves BACnet MS/TP (or Modbus RTU / N2) and replaced the older E-Link gateway. The SC-EQ list has four remote commands (start/stop, leaving chilled liquid setpoint, current limit, VSD fixed-speed select), temperatures, pressures, starter and VSD values, and multistate operation, safety, cycling and warning codes with matching analog copies.
This page lists 71 BACnet objects for the York YT Centrifugal Chiller (SC-EQ) — 5 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
- YT Centrifugal Chiller (SC-EQ)
- Equipment
- Water-cooled centrifugal chiller (via SC-EQ card)
- Equipment type
- Chillers
- BACnet objects
- 71 (5 writable)
- Transport
- BACnet MS/TP
- Firmware
- SC-EQ software 4.2.0.20
- Default device instance
- 5000 + MAC address
- Also known as
- YORK YT, YT chiller, OptiView YT, SC-EQ, SE-SCC1001-1
- Source document
- YT SC-EQ BAS Points List · rev. Rev 2.5, 2021-12-08
BMS integration notes: York YT Centrifugal Chiller (SC-EQ)
Start and stop it with BV 1 and write the leaving chilled liquid setpoint (AV 1) and current limit (AV 2). Read MV 1 for the operating state, BV 5 for motor run, the leaving water temperature and % FLA, and MV 2/MV 3 for safety and cycling shutdowns.
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.
| Object | Name | Why | Access |
|---|---|---|---|
| BV 1 | REM START STOP CMD | Remote start/stop (1 = start) | Command |
| AV 1 | REM LEAVING CHL TEMP SP | Remote leaving chilled liquid setpoint | Command |
| AV 2 | REMOTE CURRENT SP | Remote motor current limit, % | Command |
| MV 1 | UNIT OPERATION CODE | Operating state (stopped, starting, running) | Read |
| BV 5 | COMPR MOTOR STATUS | Compressor motor running | Read |
| MV 5 | UNIT CONTROL SOURCE | Control source; ISN (BAS) for BMS control | Read |
| AV 5 | LEAVING CH LIQ TEMP | Leaving chilled liquid temperature | Read |
| AV 12 | MOTOR CURRENT PCT FLA | Motor current, % FLA (load indication) | Read |
| MV 2 | UNIT SAFETY FAULT CODE | Safety shutdown code (1 = none) | Read |
| MV 3 | UNIT CYCLING FAULT CODE | Cycling shutdown code (1 = none) | Read |
Enable & remote start
BV 1 REM START STOP CMD (0 = Stop, 1 = Start) is the BAS start/stop, and AV 1-2 are the remote setpoints. MV 5 Unit Control Source shows Local, ISN (BAS), Analog, Digital or Modem; check it reads ISN (BAS). The points list has no write-enable point and doesn't say how the source is chosen at the chiller panel.
Network setup
- The BAS connects to the SC-EQ J12 port (RS-485: +, -, COM/REF, SHLD). The card detects BACnet MS/TP, Modbus RTU or N2 and the baud rate by itself; allow up to 120 seconds after power-up.
- The MAC address (1-127) is set on DIP switch SW1 (switch 8 unused). Cycle the card's power after changing it.
- The device instance defaults to 5000 + the MAC address (MAC 6 gives 5006). To use another number, set Device Instance Mode to Manual and enter the instance with the SC-AP / MAP tool, or write BV 65000 (mode) and AV 65000 (instance ID).
- MV 65001 Units sets whether the BAS sees IP or SI values, independent of the chiller display; set it to match the chiller.
Watch out for
- The remote (commandable) setpoints read as unreliable until the BAS writes them the first time.
- The SC-EQ only exposes the points that apply to the chiller it detects; if it replaces an E-Link, re-discover the device so old non-applicable points don't sit offline.
- Starter type changes what several AVs mean (see notes); check the starter before trending AV 13-15, 35 and 36.
York YT Centrifugal Chiller (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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AVmin | 1 | REM LEAVING CHL TEMP SP | Remote Leaving Chilled Liquid Setpoint | °F | Command | |
| AVmin | 2 | REMOTE CURRENT SP | Remote Current Limit Setpoint | % | Command | |
| BVmin | 1 | REM START STOP CMD | Remote Start/Stop | Command | 0=Stop, 1=Start | |
| BV | 3 | VSD FIXED SPEED SELECT | Variable Speed Drive Fixed Speed | Command | 0=Auto, 1=Fixed | |
| MV | 65001 | Units | Unit system reported by the SC-EQ | Write | 0=IP (English), 1=SI (Metric) | |
| AVmin | 5 | LEAVING CH LIQ TEMP | Leaving Chilled Liquid Temperature | °F | Read | |
| AV | 6 | ENTERING CHW TEMP | Return Chilled Liquid Temperature | °F | Read | |
| AV | 7 | EVAPORATOR PRESSURE | Evaporator Pressure | PSIA | Read | |
| AV | 8 | CONDENSER PRESSURE | Condenser Pressure | PSIA | Read | |
| AV | 9 | OIL PRESSURE DIFERENTIAL | Oil Pressure Differential | PSID | Read | |
| AV | 10 | ENTERING COND WATER TEMP | Return Condenser Liquid Temperature | °F | Read | |
| AV | 11 | LEAVING COND WATER TEMP | Leaving Condenser Liquid Temperature | °F | Read | |
| AVmin | 12 | MOTOR CURRENT PCT FLA | Motor Current Percent FLA | % | Read | |
| AV | 13 | VSD PHASE A MOTOR CURRENT / SSS PHASE A MOTOR CURRENT | Phase A motor current (VSD or solid-state starter) | Amps | Read | |
| AV | 14 | VSD PHASE B MOTOR CURRENT / SSS PHASE B MOTOR CURRENT | Phase B motor current (VSD or solid-state starter) | Amps | Read | |
| AV | 15 | VSD PHASE C MOTOR CURRENT / SSS PHASE C MOTOR CURRENT | Phase C motor current (VSD or solid-state starter) | Amps | Read | |
| AV | 16 | PHASE A_B LINE VOLTS | Solid State Starter Phase A Voltage (SSS only) | Volts | Read | |
| AV | 17 | PHASE B_C LINE VOLTS | Solid State Starter Phase B Voltage (SSS only) | Volts | Read | |
| AV | 18 | PHASE C_A LINE VOLTS | Solid State Starter Phase C Voltage (SSS only) | Volts | Read | |
| AV | 19 | LEAVING CH LIQ TEMP ACT SP | Leaving Chilled Liquid Setpoint - Selected | °F | Read | |
| AV | 20 | MOTOR CURRENT ACTUAL SP | Motor Current Limit Setpoint - Selected | % | Read | |
| AV | 21 | EVAP SATURATION TEMP | Evaporator Saturation Temp | °F | Read | |
| AV | 22 | COND SATURATION TEMP | Condenser Saturation Temp | °F | Read | |
| AV | 23 | DISCHARGE TEMP | Discharge Temperature | °F | Read | |
| AV | 24 | OIL SUMP TEMPERATURE | Oil Sump Temperature | °F | Read | |
| AV | 25 | PURGE PRESSURE | Purge Pressure | PSIA | Read | |
| AV | 26 | ACCUM OPERATING HOURS | Unit Operating Hours | Hr | Read | |
| AV | 27 | ACCUM SYSTEM STARTS | Unit System Starts | Read | ||
| BVmin | 5 | COMPR MOTOR STATUS | Motor Run Contacts | Read | 0=Off, 1=On | |
| BV | 6 | VENT LINE SOLENOID | Vent Line Solenoid | Read | 0=Off, 1=On | |
| BV | 7 | CHW PUMP STAT | Chilled Liquid Pump | Read | 0=Off, 1=On | |
| BV | 8 | STOP SWITCH STATUS | Panel Stop Switch | Read | 0=Start Enabled, 1=Stop | |
| BV | 9 | CHW FLOW SWITCH STAT | Chilled Liquid Flow Switch | Read | 0=Open, 1=Closed | |
| BV | 17 | ACC VALVE SURGE MAP | Adaptive Capacity Control Valid Surge Map (VSD only) | Read | 0=False, 1=True | |
| BV | 18 | ACC NEW SURGE POINT | Adaptive Capacity Control New Surge Point (VSD only) | Read | 0=False, 1=True | |
| BV | 19 | VSD COOL PUMP RUN RELAY | Variable Speed Drive Water Pump Relay (VSD only) | Read | 0=Off, 1=On | |
| BV | 20 | VSD HARMONIC FILTER INST | Harmonic Filter Installed (VSD only) | Read | 0=False, 1=True | |
| BV | 21 | ACC SURGE DETECTION TYPE | Adaptive Capacity Control Surge Type (VSD only) | Read | 0=Delta P/P, 1=Current | |
| MVmin | 1 | UNIT OPERATION CODE | Unit Operation Code | Read | 1=Unit Stopped - Ready To Start, 2=Unit Stopped - Local Shutdown, 3=Unit Stopped - Remote Shutdown, 4=Unit Stopped - Warning Active, 5=Unit Stopped - Cycling Shutdown, 6=Unit Stopped - Safety Shutdown, 7=Unit Start Inhibit, 8=Unit Starting, 9=Unit Running - No Abnormal Condition, 10=Unit Running - Warning Active, 11=Unit Running - Chiller Unload Before Shutdown, 12=Unit Coastdown | |
| AV | 401 | UNIT OPERATION CODE AV | Unit Operation Code AV | Read | 0=Unit Stopped - Ready To Start, 1=Unit Stopped - Local Shutdown, 2=Unit Stopped - Remote Shutdown, 3=Unit Stopped - Warning Active, 4=Unit Stopped - Cycling Shutdown, 5=Unit Stopped - Safety Shutdown, 6=Unit Start Inhibit, 7=Unit Starting, 8=Unit Running - No Abnormal Condition, 9=Unit Running - Warning Active, 10=Unit Running - Chiller Unload Before Shutdown, 11=Unit Coastdown | |
| MVmin | 2 | UNIT SAFETY FAULT CODE | Unit Safety Fault Code | Read | 1=No Abnormal Condition, 2=Evaporator - Low Pressure, 3=Evaporator - Transducer Or Leaving Liquid Probe, 4=Evaporator - Temperature Transducer, 5=Condenser - High Pressure Contacts Open, 6=Condenser - High Pressure, 7=Condenser - Pressure Transducer Out Of Range, 8=Auxiliary Safety - Contacts Closed, 9=Discharge - Low Temperature, 10=Discharge - High Temperature, 11=Oil - High Temperature, 12=Oil - Low Differential Pressure, 13=Oil - High Differential Pressure, 22=Control Panel - Power Failure, 24=Motor Or Starter - Current Imbalance, 30=VSD - High Heatsink Temperature, 31=VSD - 105% Motor Current Overload, 32=VSD - High Phase A Inverter Heatsink Temperature, 33=VSD - High Phase B Inverter Heatsink Temperature, 34=VSD - High Phase C Inverter Heatsink Temperature, 35=VSD - High Converter Heatsink Temperature, 36=VSD - Precharge Lockout, 37=Harmonic Filter - High Heatsink Temperature, 38=Harmonic Filter - High Total Demand Distortion, 39=LCSSS - Phase Loss, 40=LCSSS - Current Imbalance, 41=LCSSS - 105% Motor Current Overload, 42=LCSSS - High Current, 43=LCSSS - Open SCR, 44=LCSSS - Shorted Phase A SCR, 45=LCSSS - Shorted Phase B SCR, 46=LCSSS - Shorted Phase C SCR, 47=LCSSS - High Phase A Temperature - Running, 48=LCSSS - High Phase B Temperature - Running, 49=LCSSS - High Phase C temperature - Running, 50=Starter - Invalid Motor Selection, 52=Evaporator - Low Pressure, 53=Evaporator - Low Pressure - Smart Freeze | |
| AV | 402 | UNIT SAFETY FAULT CODE AV | Unit Safety Fault Code AV | Read | 0=No Abnormal Condition, 1=Evaporator - Low Pressure, 2=Evaporator - Transducer Or Leaving Liquid Probe, 3=Evaporator - Temperature Transducer, 4=Condenser - High Pressure Contacts Open, 5=Condenser - High Pressure, 6=Condenser - Pressure Transducer Out Of Range, 7=Auxiliary Safety - Contacts Closed, 8=Discharge - Low Temperature, 9=Discharge - High Temperature, 10=Oil - High Temperature, 11=Oil - Low Differential Pressure, 12=Oil - High Differential Pressure, 21=Control Panel - Power Failure, 23=Motor Or Starter - Current Imbalance, 29=VSD - High Heatsink Temperature, 30=VSD - 105% Motor Current Overload, 31=VSD - High Phase A Inverter Heatsink Temperature, 32=VSD - High Phase B Inverter Heatsink Temperature, 33=VSD - High Phase C Inverter Heatsink Temperature, 34=VSD - High Converter Heatsink Temperature, 35=VSD - Precharge Lockout, 36=Harmonic Filter - High Heatsink Temperature, 37=Harmonic Filter - High Total Demand Distortion, 38=LCSSS - Phase Loss, 39=LCSSS - Current Imbalance, 40=LCSSS - 105% Motor Current Overload, 41=LCSSS - High Current, 42=LCSSS - Open SCR, 43=LCSSS - Shorted Phase A SCR, 44=LCSSS - Shorted Phase B SCR, 45=LCSSS - Shorted Phase C SCR, 46=LCSSS - High Phase A Temperature - Running, 47=LCSSS - High Phase B Temperature - Running, 48=LCSSS - High Phase C temperature - Running, 49=Starter - Invalid Motor Selection, 51=Evaporator - Low Pressure, 52=Evaporator - Low Pressure - Smart Freeze | |
| MVmin | 3 | UNIT CYCLING FAULT CODE | Unit Cycling Fault Code | Read | 1=No Abnormal Condition, 2=Multi-Unit Cycling - Contacts Open, 3=System Cycling - Contacts Open, 5=Oil - Low Temperature, 6=Control Panel - Power Failure, 7=Leaving Chilled Liquid - Low Temperature, 8=Leaving Chilled Liquid - Flow Switch Open, 9=Condenser - Flow Switch Open, 10=Motor Controller - Contacts Open, 11=Motor Controller - Loss Of Current, 12=Power Fault, 13=Control Panel - Schedule, 14=Starter - Low Supply Line Voltage, 15=Starter - High Supply Line Voltage, 18=VSD Initialization Failure, 19=VSD Shutdown - Requesting Fault Data, 20=VSD - High Phase A Instantaneous Current, 21=VSD - High Phase B Instantaneous Current, 22=VSD - High Phase C Instantaneous Current, 23=VSD - Phase A Gate Driver, 24=VSD - Phase B Gate Driver, 25=VSD - Phase C Gate Driver, 26=VSD - Single Phase Input Power, 27=VSD - High DC Bus Voltage, 28=VSD - Logic Board Power Supply, 29=VSD - Low DC Bus Voltage, 30=VSD - DC Bus Voltage Imbalance, 31=VSD - High Internal Ambient Temperature, 32=VSD - Invalid Current Scale Selection, 33=VSD - Low Phase A Inverter Heatsink Temperature, 34=VSD - Low Phase B Inverter Heatsink Temperature, 35=VSD - Low Phase C Inverter Heatsink Temperature, 36=VSD - Low Converter Heatsink Temperature, 37=VSD - Precharge - DC Bus Voltage Imbalance, 38=VSD - Precharge - Low DC Bus Voltage, 39=VSD - Logic Board Processor, 40=VSD - Run Signal, 41=VSD - Serial Communications, 42=VSD - Stop Contacts Open, 43=Harmonic Filter - Logic Board Or Communications, 44=Harmonic Filter - High DC Bus Voltage, 45=Harmonic Filter - High Phase A Instantaneous Current, 47=Harmonic Filter - High Phase C Instantaneous Current, 48=Harmonic Filter - Phase Locked Loop, 49=Harmonic Filter - Precharge - Low DC Bus Voltage, 50=Harmonic Filter - Low DC Bus Voltage, 51=Harmonic Filter - DC Bus Voltage Imbalance, 52=Harmonic Filter - 110% Input Current Overload, 53=Harmonic Filter - Logic Board Power Supply, 54=Harmonic Filter - Run Signal, 55=Harmonic Filter - DC Current Transformer 1, 56=Harmonic Filter - DC Current Transformer 2, 57=LCSSS Initialization Failure, 58=LCSSS Shutdown - Requesting Fault Data, 59=LCSSS - Low Phase A Heatsink Temperature, 60=LCSSS - Low Phase B Heatsink Temperature, 61=LCSSS - Low Phase C Heatsink Temperature, 62=LCSSS - Phase Locked Loop, 63=LCSSS - Power Fault, 64=LCSSS - High Supply Line Voltage, 65=LCSSS - Low Supply Line Voltage, 66=LCSSS - Invalid Model Selection, 67=LCSSS - Run Signal, 68=LCSSS - Serial Communications, 69=LCSSS - Stop Contacts Open, 71=LCSSS - Logic Board Processor, 73=LCSSS - Power Fail, 74=VSD - Serial Communications, 75=LCSSS - Serial Communications, 76=LCSSS - Phase Loss | |
| AV | 403 | UNIT CYCLING FAULT CODE AV | Unit Cycling Fault Code AV | Read | 0=No Abnormal Condition, 1=Multi-Unit Cycling - Contacts Open, 2=System Cycling - Contacts Open, 4=Oil - Low Temperature, 5=Control Panel - Power Failure, 6=Leaving Chilled Liquid - Low Temperature, 7=Leaving Chilled Liquid - Flow Switch Open, 8=Condenser - Flow Switch Open, 9=Motor Controller - Contacts Open, 10=Motor Controller - Loss Of Current, 11=Power Fault, 12=Control Panel - Schedule, 13=Starter - Low Supply Line Voltage, 14=Starter - High Supply Line Voltage, 17=VSD Initialization Failure, 18=VSD Shutdown - Requesting Fault Data, 19=VSD - High Phase A Instantaneous Current, 20=VSD - High Phase B Instantaneous Current, 21=VSD - High Phase C Instantaneous Current, 22=VSD - Phase A Gate Driver, 23=VSD - Phase B Gate Driver, 24=VSD - Phase C Gate Driver, 25=VSD - Single Phase Input Power, 26=VSD - High DC Bus Voltage, 27=VSD - Logic Board Power Supply, 28=VSD - Low DC Bus Voltage, 29=VSD - DC Bus Voltage Imbalance, 30=VSD - High Internal Ambient Temperature, 31=VSD - Invalid Current Scale Selection, 32=VSD - Low Phase A Inverter Heatsink Temperature, 33=VSD - Low Phase B Inverter Heatsink Temperature, 34=VSD - Low Phase C Inverter Heatsink Temperature, 35=VSD - Low Converter Heatsink Temperature, 36=VSD - Precharge - DC Bus Voltage Imbalance, 37=VSD - Precharge - Low DC Bus Voltage, 38=VSD - Logic Board Processor, 39=VSD - Run Signal, 40=VSD - Serial Communications, 41=VSD - Stop Contacts Open, 42=Harmonic Filter - Logic Board Or Communications, 43=Harmonic Filter - High DC Bus Voltage, 44=Harmonic Filter - High Phase A Instantaneous Current, 46=Harmonic Filter - High Phase C Instantaneous Current, 47=Harmonic Filter - Phase Locked Loop, 48=Harmonic Filter - Precharge - Low DC Bus Voltage, 49=Harmonic Filter - Low DC Bus Voltage, 50=Harmonic Filter - DC Bus Voltage Imbalance, 51=Harmonic Filter - 110% Input Current Overload, 52=Harmonic Filter - Logic Board Power Supply, 53=Harmonic Filter - Run Signal, 54=Harmonic Filter - DC Current Transformer 1, 55=Harmonic Filter - DC Current Transformer 2, 56=LCSSS Initialization Failure, 57=LCSSS Shutdown - Requesting Fault Data, 58=LCSSS - Low Phase A Heatsink Temperature, 59=LCSSS - Low Phase B Heatsink Temperature, 60=LCSSS - Low Phase C Heatsink Temperature, 61=LCSSS - Phase Locked Loop, 62=LCSSS - Power Fault, 63=LCSSS - High Supply Line Voltage, 64=LCSSS - Low Supply Line Voltage, 65=LCSSS - Invalid Model Selection, 66=LCSSS - Run Signal, 67=LCSSS - Serial Communications, 68=LCSSS - Stop Contacts Open, 70=LCSSS - Logic Board Processor, 72=LCSSS - Power Fail, 73=VSD - Serial Communications, 74=LCSSS - Serial Communications, 75=LCSSS - Phase Loss | |
| MV | 4 | UNIT WARNING CODE | Unit Warning Code | Read | 1=No Abnormal Condition, 2=Real-Time Clock Failure, 3=Default Setpoints Loaded, 4=Evaporator Or Condenser Transducer Error, 5=Evaporator - Low Pressure Limit, 6=Condenser - High Pressure Limit, 11=Purge - High Pressure, 12=Purge - Float Switch Error, 13=Purge - Excess Purge, 15=Motor - High Current Limit, 16=Vanes Uncalibrated, 17=Vanes Uncalibrated - Fixed Speed Operation, 18=Harmonic Filter - Operation Inhibited, 19=Harmonic Filter - Data Loss, 20=Harmonic Filter - Input Frequency Out Of Range, 27=External I/O Board Serial Communications | |
| AV | 404 | UNIT WARNING CODE AV | Unit Warning Code AV | Read | 0=No Abnormal Condition, 1=Real-Time Clock Failure, 2=Default Setpoints Loaded, 3=Evaporator Or Condenser Transducer Error, 4=Evaporator - Low Pressure Limit, 5=Condenser - High Pressure Limit, 10=Purge - High Pressure, 11=Purge - Float Switch Error, 12=Purge - Excess Purge, 14=Motor - High Current Limit, 15=Vanes Uncalibrated, 16=Vanes Uncalibrated - Fixed Speed Operation, 17=Harmonic Filter - Operation Inhibited, 18=Harmonic Filter - Data Loss, 19=Harmonic Filter - Input Frequency Out Of Range, 26=External I/O Board Serial Communications | |
| MVmin | 5 | UNIT CONTROL SOURCE | Unit Control Source | Read | 0=Local, 1=ISN (BAS), 2=Analog, 3=Digital, 4=Modem | |
| AV | 405 | UNIT CONTROL SOURCE AV | Unit control source (analog copy) | Read | 0=Local, 1=ISN (BAS), 2=Analog, 3=Digital, 4=Modem | |
| AV | 32 | VSD ANTI RECYCLE TIME REMAIN | Variable Speed Drive Anti-Recycle Time Remaining (VSD only) | Min | Read | |
| AV | 33 | ACC MAP PRV POS | Adaptive Capacity Control Map PRV Position (VSD only) | % | Read | |
| AV | 34 | VSD OUTPUT VOLTAGE | Variable Speed Drive Output Voltage (VSD only) | Volts | Read | |
| AV | 35 | VSD INPUT KW / SSS ANTI RECYCLE TIME REMAIN | VSD: input power, kW. SSS/EM starter: anti-recycle time, min | kW / Min | Read | |
| AV | 36 | VSD INPUT KWH / PRE ROTATION VANE POS | VSD: input kWh. SSS/EM starter: pre-rotation vane position, % | kWh / % | Read | |
| AV | 37 | VSD DC LINK VOLTAGE | Variable Speed Drive DC Bus Voltage (VSD only) | Volts | Read | |
| AV | 38 | VSD DC LINK CURRENT | Variable Speed Drive Inverter Link Current (VSD only) | Amps | Read | |
| AV | 39 | VSD SURGE COUNT | Adaptive Capacity Control Surge Count (VSD only) | Read | ||
| AV | 40 | VSD OUTPUT FREQUENCY | Variable Speed Drive Output Frequency (VSD only) | Hz | Read | |
| AV | 41 | VSD MAX VOLTAGE THD | Harmonic Filter Maximum Voltage Total Harmonic Distortion (VSD only) | % | Read | |
| AV | 42 | VSD MAX CURRENT TDD | Harmonic Filter Maximum Current Total Demand Distortion (VSD only) | % | Read | |
| AV | 43 | FILTER SUPPLY KVA | Harmonic Filter Total Supply KVA (VSD only) | kVA | Read | |
| AV | 110 | VSD INTERNAL AMBIENT TEMP | VSD Internal Ambient Temp (VSD only) | °F | Read | |
| AV | 111 | VSD CONVERTER HSINK TEMP | VSD Converter Heatsink Temp (VSD only) | °F | Read | |
| AV | 112 | VSD PRE ROTATION VANE POS | Variable Speed Drive Pre Rotation Vanes Position (VSD only) | % | Read | |
| AV | 113 | ACC MAP OUTPUT FREQ | ACC Map Output Frequency (VSD only) | Hz | Read | |
| AV | 114 | REFRIGERANT LEVEL SP | Refrigerant Level Setpoint (VSD only) | % | Read | |
| AV | 115 | DROP LEG REFRIG TEMP | Drop Leg Refrigerant Temperature (VSD only) | °F | Read | |
| AV | 120 | INPUT KWH | Input Kilowatt Hours (SSS only) | kWh | Read | |
| AV | 121 | INPUT KWH LO SSS / INPUT KWH LO | Input kWh low part (kWh modulo 10,000) | Read | ||
| AV | 122 | INPUT KWH OFFSET SSS / INPUT KWH OFFSET | Input kWh offset part (kWh divided by 10,000) | Read | ||
| AV | 123 | OPERATING HOURS LO | Operating hours low part (hours modulo 10,000) | Read | ||
| AV | 124 | OPERATING HOURS OFFSET | Operating hours offset part (hours divided by 10,000) | Read |
No points match these filters.
Integration notes
- Access is inferred: the sheet has no read/write column. The remote block (AV 1-2, BV 1, BV 3) is treated as commandable and MV 65001 as writable; everything else as read-only.
- Some instances depend on the starter: AV 13-15, AV 35, AV 36, AV 121 and AV 122 carry VSD values on VSD units and solid-state or electro-mechanical starter values otherwise. These are merged into one row each.
- Status-code MVs (operation, fault, warning, modified run, start inhibit, internal fault) are the printed code + 1, as the doc's status code tables say; the AV copies (AV 401 and up) carry the raw code. MVs with their own enum in the points table (Units, control sources) are shown as printed, from 0; BACnet multistate values start at 1, so the card may report the printed number + 1. Confirm by discovery.
- Units shown are the IP units; with MV 65001 set to SI the card reports °C, kPa and so on.
- Operating hours and kWh are also split into low/offset pairs (value = offset x 10,000 + low).
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. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the YT Centrifugal Chiller (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 YT Centrifugal Chiller (SC-EQ)
How many BACnet points does the York YT Centrifugal Chiller (SC-EQ) have?
This list has 71 BACnet objects: 53 analog values, 12 binary values, 6 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which York YT Centrifugal Chiller (SC-EQ) BACnet points are writable?
5 of the 71 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 YT Centrifugal Chiller (SC-EQ) BACnet documentation?
The source is YT SC-EQ BAS Points List, revision Rev 2.5, 2021-12-08, published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/qySCXKFcGaJK93xZ8jJBmA/content.
What are the minimum BACnet points to integrate the York YT Centrifugal Chiller (SC-EQ)?
Start with BV 1 REM START STOP CMD (Remote start/stop (1 = start)); AV 1 REM LEAVING CHL TEMP SP (Remote leaving chilled liquid setpoint); AV 2 REMOTE CURRENT SP (Remote motor current limit, %); MV 1 UNIT OPERATION CODE (Operating state (stopped, starting, running)); BV 5 COMPR MOTOR STATUS (Compressor motor running); MV 5 UNIT CONTROL SOURCE (Control source; ISN (BAS) for BMS control); AV 5 LEAVING CH LIQ TEMP (Leaving chilled liquid temperature); AV 12 MOTOR CURRENT PCT FLA (Motor current, % FLA (load indication)); MV 2 UNIT SAFETY FAULT CODE (Safety shutdown code (1 = none)); MV 3 UNIT CYCLING FAULT CODE (Cycling shutdown code (1 = none)).
How do I enable BMS control of the York YT Centrifugal Chiller (SC-EQ)?
BV 1 REM START STOP CMD (0 = Stop, 1 = Start) is the BAS start/stop, and AV 1-2 are the remote setpoints. MV 5 Unit Control Source shows Local, ISN (BAS), Analog, Digital or Modem; check it reads ISN (BAS). The points list has no write-enable point and doesn't say how the source is chosen at the chiller panel.
How do I check these points on the real YT Centrifugal Chiller (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
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YORK YCAV and YCIV air-cooled variable-speed screw chillers (up to four refrigerant systems) with the 031-03478 microboard and its native BAS port.
Also known as: YORK YCAV, YORK YCIV, 031-03478, YCAV_IV Native, Latitude - Water-cooled dual-compressor centrifugal chiller (via SC-EQ card)
York YD Dual-Compressor Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YD water-cooled centrifugal chillers with two compressors, fitted with the SC-EQ communication card.
Also known as: YD, YORK YD, SC-EQ, SC-EQUIP, SE-SCC1001-1, OptiView - Water-cooled centrifugal chiller (via SC-EQ card)
York YK Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YK water-cooled centrifugal chillers (OptiView panel) fitted with the SC-EQ communication card.
Also known as: YK, YORK YK, SC-EQ, SC-EQUIP, SE-SCC1001-1, OptiView - Water-cooled centrifugal chiller with economizer compressor (via SC-EQ card)
York YK-EP Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YK-EP (Efficiency Plus) water-cooled centrifugal chillers, which pair the main compressor with an economizer compressor, fitted with the SC-EQ communication card.
Also known as: YK-EP, YKEP, YK EP, YK-EP Efficiency Plus, SC-EQ, SC-EQUIP, SE-SCC1001-1 - Air-to-water modular heat pump (four-pipe)
York YMAE Four-Pipe Modular Heat Pump
YORK YMAE air-to-water modular heat pumps with inverter compressors in the four-pipe (simultaneous heating and cooling) version.
Also known as: YORK YMAE, YMAE-130, YMAE four pipe, air-to-water heat pump - Water-cooled magnetic-bearing centrifugal chiller (via SC-EQ card)
York YMC2 Magnetic-Bearing Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YMC2 oil-free, magnetic-bearing centrifugal chillers with a variable speed drive, fitted with the SC-EQ communication card.
Also known as: YMC2, YORK YMC2, YMC², SC-EQ, SC-EQUIP, SE-SCC1001-1 - Steam-turbine-driven centrifugal chiller (via SC-EQ card)
York YST Steam Turbine Chiller (SC-EQ)
YORK YST steam-turbine-driven centrifugal chillers fitted with the SC-EQ communication card.
Also known as: YORK YST, YST chiller, steam turbine drive chiller, SC-EQ, SE-SCC1001-1 - Air-cooled variable-speed screw chiller (via E-Link gateway)
York YVAA / YVFA / YAGK E-Link (YorkTalk 2)
YORK YVAA, YVFA (free cooling) and YAGK air-cooled variable-speed screw chillers with 031-02478 or 031-03478 microboards, connected through a YORK E-Link gateway over YorkTalk 2.
Also known as: YORK YVAA, YORK YVFA, YAGK, E-Link, eLink, YorkTalk 2, 031-02478, 031-03478 - Air-cooled variable-speed screw chiller (via SC-EQ card)
York YVAA Style B Chiller (SC-EQ)
YORK YVAA Style B air-cooled variable-speed screw chillers (two refrigerant systems) fitted with the SC-EQ communication card.
Also known as: YORK YVAA, YVAA Style B, YVAA-B, SC-EQ, SE-SCC1001-1 - Water-cooled screw chiller / water-to-water heat pump (via SC-EQ card)
York YVWH / YVWE / YGWH Water-Cooled Screw (SC-EQ)
YORK YVWH and YGWH water-to-water screw heat pumps and YVWE water-cooled screw chillers fitted with the SC-EQ communication card.
Also known as: YORK YVWH, YVWH-200, YORK YVWE, YORK YGWH, SC-EQ, water-to-water screw heat pump
Source: YT SC-EQ BAS Points List · rev. Rev 2.5, 2021-12-08. Object names, instances and units are reproduced as published; descriptions are our own.