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Water-cooled dual-compressor centrifugal chiller (via SC-EQ card) · BACnet points list
York YD Dual-Compressor Centrifugal Chiller (SC-EQ) BACnet points list
Updated 28 October 2026
The YD's SC-EQ card puts the chiller on a BACnet MS/TP trunk (or Modbus RTU / N2). Most motor, vane, oil and drive points come in #1/#2 pairs, one per compressor. Besides run/stop and the setpoints, the BAS can write the compressor operation mode (staged, single, dual) and lock out one compressor.
This page lists 150 BACnet objects for the York YD Dual-Compressor Centrifugal Chiller (SC-EQ) — 6 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
- YD Dual-Compressor Centrifugal Chiller (SC-EQ)
- Equipment
- Water-cooled dual-compressor centrifugal chiller (via SC-EQ card)
- Equipment type
- Chillers
- BACnet objects
- 150 (6 writable)
- Transport
- BACnet MS/TP
- Firmware
- SC-EQ software 4.2.0.20
- Default device instance
- 5000 + MAC address
- Also known as
- YD, YORK YD, SC-EQ, SC-EQUIP, SE-SCC1001-1, OptiView
- Source document
- YD SC-EQ BAS Points List · rev. Rev 2.4, 2021-12-08
BMS integration notes: York YD Dual-Compressor Centrifugal Chiller (SC-EQ)
Wire the BAS to the SC-EQ J12 RS-485 port, set the MAC address on the DIP switch and let the card detect BACnet MS/TP. Write the remote run/stop, leaving chilled liquid setpoint and current limit (optionally the compressor mode and lockout), then read both motor run states, the operation code, leaving chilled liquid temperature, % FLA and the safety fault code.
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 RUN STOP CMD | Remote run/stop (1 = run) | 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 1 | Compressor 1 motor running | Read |
| BV 6 | COMPR MOTOR STATUS 2 | Compressor 2 motor running | Read |
| MV 8 | UNIT CONTROL SOURCE | Control source; ISN (BAS) for BMS control | Read |
| AV 5 | LEAVING CH LIQ TEMP | Leaving chilled liquid temperature | Read |
| AV 13 | MOTOR CURRENT FLA 1 | Compressor 1 motor current, % FLA | Read |
| MV 2 | UNIT SAFETY FAULT CODE | Safety shutdown code (1 = none) | Read |
Enable & remote start
BV 1 REM RUN STOP CMD (0 = Stop, 1 = Run) is the BAS run/stop, and AV 1-4 are the remote setpoints and compressor mode/lockout. MV 8 Unit Control Source reports Local, ISN (BAS), Analog, Digital, Modem or Remote. The YD list has no per-function source points and no write-enable point, and it 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.
- Turn the card's RS-485 end-of-line switches on only when it is at the end of the trunk.
Watch out for
- The BAS port is RS-485 only (BACnet MS/TP, Modbus RTU or N2); the card has no BACnet IP port.
- Most compressor points are #1/#2 pairs; map both for a full picture.
- Remote setpoints show as unreliable until the BAS has written them once.
- The card only exposes points that apply to the detected chiller and its options. Replacing an E-Link leaves the old, non-applicable points offline in the BAS until you rediscover the device.
- Code points come in pairs: the MV state is the code + 1, and the AV copy (AV 401 and up) carries the raw code.
York YD Dual-Compressor 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 Unit Current Limit Setpoint | % | Command | |
| AV | 3 | REM COMP OPERATION MODE | Remote Compressor Operation Mode | Command | 0=Staged, 1=Single, 2=Dual | |
| AV | 4 | REM COMP LOCKOUT | Remote Compressor Remote Lockout | Command | 0=None, 1=Comp #1, 2=Comp #2 | |
| BVmin | 1 | REM RUN STOP CMD | Remote Run/Stop | Command | 0=Stop, 1=Run | |
| 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 CH LIQ TEMP | Entering Chilled Liquid Temperature | °F | Read | |
| AV | 7 | EVAPORATOR PRESSURE | Evaporator Pressure | PSIG | Read | |
| AV | 8 | CONDENSER PRESSURE | Condenser Pressure | PSIG | Read | |
| AV | 9 | OIL DIFERENTL PRESSURE 1 | Oil Pressure Differential #1 | PSID | Read | |
| AV | 10 | OIL DIFERENTL PRESSURE 2 | Oil Pressure Differential #2 | PSID | Read | |
| AV | 11 | ENTERING COND WATER TEMP | Entering Condenser Liquid Temperature | °F | Read | |
| AV | 12 | LEAVING COND WATER TEMP | Leaving Condenser Liquid Temperature | °F | Read | |
| AVmin | 13 | MOTOR CURRENT FLA 1 | Motor Current Percent FLA #1 | % | Read | |
| AV | 14 | MOTOR CURRENT FLA 2 | Motor Current Percent FLA #2 | % | Read | |
| AV | 15 | EVAP REFRIGERANT TEMP | Evaporator Refrigerant Temperature | °F | Read | |
| AV | 16 | DROP LEG REFRIG TEMP | Drop Leg Refrigerant Temperature (Drop Leg Temp Enabled only) | °F | Read | |
| AV | 17 | LEAVING CH LIQ TEMP ACT SP | Leaving Chilled Liquid Setpoint - Selected | °F | Read | |
| AV | 18 | MOTOR CURRENT ACTUAL SP | Unit Current Limit Setpoint - Selected | % | Read | |
| AV | 19 | EVAP SATURATION TEMP | Evaporator Saturation Temperature | °F | Read | |
| AV | 20 | COND SATURATION TEMP | Condenser Saturation Temperature | °F | Read | |
| AV | 21 | DISCHARGE TEMP 1 | Discharge Temperature #1 | °F | Read | |
| AV | 22 | DISCHARGE TEMP 2 | Discharge Temperature #2 | °F | Read | |
| AV | 23 | OIL SUMP TEMPERATURE | Oil Sump Temperature | °F | Read | |
| AV | 24 | COND REFRIGERANT LEVEL | Condenser Refrigerant Level | % | Read | |
| AV | 25 | ACCUM OPERATING HOURS | Unit Operating Hours | Hr | Read | |
| AV | 26 | ACCUM SYSTEM STARTS | Unit System Starts | Read | ||
| AV | 27 | OIL SUMP PRESSURE | Oil Sump Pressure PSIG | PSIG | Read | |
| AV | 28 | OIL PUMP PRESSURE 1 | Oil Pump Pressure #1 PSIG | PSIG | Read | |
| AV | 29 | OIL PUMP PRESSURE 2 | Oil Pump Pressure #2 PSIG | PSIG | Read | |
| BVmin | 5 | COMPR MOTOR STATUS 1 | Motor Run #1 | Read | 0=Off, 1=On | |
| BVmin | 6 | COMPR MOTOR STATUS 2 | Motor Run #2 | Read | 0=Off, 1=On | |
| BV | 7 | CND LIQ PUMP STAT | Condenser Liquid Pump | Read | 0=Off, 1=On | |
| BV | 8 | CH LIQ PUMP STAT | Chilled Liquid Pump | Read | 0=Off, 1=On | |
| BV | 9 | START STOP SWITCH STATUS | Panel Stop Switch | Read | 0=Off, 1=On | |
| BV | 10 | CH LIQ FLOW SWITCH STAT | Chilled Liquid Flow Switch | Read | 0=Open, 1=Closed | |
| BV | 11 | CND FLOW SWITCH STAT | Condenser Liquid Flow Switch | Read | 0=Open, 1=Closed | |
| BV | 12 | DISCH HI PRESS SW 1 | Discharge High Pressure Switch #1 | Read | 0=Open, 1=Closed | |
| BV | 13 | DISCH HI PRESS SW 2 | Discharge High Pressure Switch #2 | Read | 0=Open, 1=Closed | |
| BV | 14 | VANE MOTOR SW 1 | Vane Motor Switch #1 | Read | 0=Open, 1=Closed | |
| BV | 15 | VANE MOTOR SW 2 | Vane Motor Switch #2 | Read | 0=Open, 1=Closed | |
| BV | 16 | REFRIGERANT LEVEL LOWER | Refrigerant Level Lower | Read | 0=Off, 1=On | |
| BV | 17 | REFRIGERANT LEVEL RAISE | Refrigerant Level Raise | Read | 0=Off, 1=On | |
| BV | 18 | OIL RETURN SOLENOID | Oil Return Solenoid | Read | 0=Off, 1=On | |
| BV | 19 | PRV OPENING 1 | Pre-Rotation Vane Opening #1 | Read | 0=Off, 1=On | |
| BV | 20 | PRV OPENING 2 | Pre Rotation Vane Opening #2 | Read | 0=Off, 1=On | |
| BV | 21 | PRV CLOSING 1 | Pre-Rotation Vane Closing #1 | Read | 0=Off, 1=On | |
| BV | 22 | PRV CLOSING 2 | Pre-Rotation Vane Closing #2 | Read | 0=Off, 1=On | |
| 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 Start Inhibit, 6=Unit Stopped - Cycling Shutdown, 7=Unit Stopped - Safety Shutdown, 8=Unit Stopped - Internal Shutdown, 9=Unit Starting, 10=Unit Running - No Abnormal Condition, 11=Unit Running - Modified Run, 12=Unit Running - Warning Active, 13=Unit Coastdown, 14=Unit Running - Chiller Unload Before Shutdown, 15=Unit Starting - MVVSD Startup - Drive Not Ready | |
| AV | 401 | UNIT OPERATION CODE AV | Unit Operation Code, raw code (MV 1 shows code + 1) | Read | ||
| MVmin | 2 | UNIT SAFETY FAULT CODE | Unit Safety Fault Code | Read | 1=No Safety Faults Present; other values (up to 209) are YD Safety Fault Code table SC.2 codes plus 1 (208 codes listed in the source doc) | |
| AV | 402 | UNIT SAFETY FAULT CODE AV | Unit Safety Fault Code, raw code (MV 2 shows code + 1) | Read | ||
| MV | 3 | UNIT CYCLING FAULT CODE | Unit Cycling Fault Code | Read | 1=No Cycling Faults Present; other values (up to 282) are YD Cycling Fault Code table SC.3 codes plus 1 (281 codes listed in the source doc) | |
| AV | 403 | UNIT CYCLING FAULT CODE AV | Unit Cycling Fault Code, raw code (MV 3 shows code + 1) | Read | ||
| MV | 4 | UNIT WARNING CODE | Unit Warning Code | Read | 1=No Warnings Present; other values (up to 90) are YD Warning Code table SC.4 codes plus 1 (85 codes listed in the source doc) | |
| AV | 404 | UNIT WARNING CODE AV | Unit Warning Code, raw code (MV 4 shows code + 1) | Read | ||
| MV | 5 | UNIT MODIFIED RUN CODE | Unit Modified Run Code | Read | 1=No Modified Run Conditions Present, 2=Leaving Chilled Liquid Control, 3=System Unloading Before Shutdown, 4=Lag Compressor Unloading Before Shutdown, 5=Lead Motor - Pulldown Limit, 6=Lead Motor - High Current Limit, 7=Motor #1 Start Inhibit - Anti-Recycle, 8=Motor #2 Start Inhibit - Anti-Recycle, 9=Vanes #1 Start Inhibit - Motor Switch Open, 10=Vanes #2 Start Inhibit - Motor Switch Open, 11=Lag Compressor Prelube, 12=Lag Compressor Coastdown, 13=System In Lead Compressor Pulldown, 14=Lead VSD – INPUT PULLDOWN LIMIT, 15=Lead VSD – HIGH INPUT CURRENT LIMIT | |
| AV | 405 | UNIT MODIFIED RUN CODE AV | Unit Modified Run Code, raw code (MV 5 shows code + 1) | Read | ||
| MV | 6 | UNIT START INHIBIT CODE | Unit Start Inhibit Code | Read | 1=No Start Inhibits Present, 2=Motor #1 - Anti-Recycle, 3=Motor #2 - Anti-Recycle, 4=Vanes #1 - Motor Switch Open, 5=Vanes #2 - Motor Switch Open, 6=Motor #1 - Current > 15% Fla, 7=Motor #2 - Current > 15% Fla, 8=VSD #1 - Frequency > 0 Hz, 9=VSD #2 - Frequency > 0 Hz, 10=LINE FREQUENCY NOT SET, 11=PRV #1 NOT CALIBRATED, 12=PRV #2 NOT CALIBRATED, 13=VGD #1 NOT CALIBRATED, 14=VGD #2 NOT CALIBRATED, 15=LINE VOLTAGE NOT SET, 16=MVSSS #1 – HIGH HEATSINK TEMPERATURE – STOPPED, 17=MVSSS #2 – HIGH HEATSINK TEMPERATURE – STOPPED, 18=MVSSS #1 – HIGH HEATSINK 1 TEMPERATURE – STOPPED, 19=MVSSS #2 – HIGH HEATSINK 1 TEMPERATURE – STOPPED, 20=MVSSS #1 – HIGH HEATSINK 2 TEMPERATURE – STOPPED, 21=MVSSS #2 – HIGH HEATSINK 2 TEMPERATURE – STOPPED, 22=MVSSS #1 – HIGH HEATSINK 3 TEMPERATURE – STOPPED, 23=MVSSS #2 – HIGH HEATSINK 3 TEMPERATURE – STOPPED | |
| AV | 406 | UNIT START INHIBIT CODE AV | Unit Start Inhibit Code, raw code (MV 6 shows code + 1) | Read | ||
| MV | 7 | UNIT INTERNAL FAULT CODE | Unit Internal Fault Code | Read | 1=No Internal Faults Present, 2=Internal Error - No Timer Handles Available, 3=Watchdog - Software Reboot, 4=Internal Error - Cannot Create Task | |
| AV | 407 | UNIT INTERNAL FAULT CODE AV | Unit Internal Fault Code, raw code (MV 7 shows code + 1) | Read | ||
| MVmin | 8 | UNIT CONTROL SOURCE | Unit Control Source | Read | 0=Local, 1=ISN (BAS), 2=Analog, 3=Digital, 4=Modem, 5=Remote | |
| AV | 408 | UNIT CONTROL SOURCE AV | Unit Control Source, same codes as MV 8 | Read | 0=Local, 1=ISN (BAS), 2=Analog, 3=Digital, 4=Modem, 5=Remote | |
| AV | 30 | PROX SENSOR ACT POS 1 | High Speed Thrust Bearing Proximity Position #1 | Mils | Read | |
| AV | 31 | PROX SENSOR ACT POS 2 | High Speed Thrust Bearing Proximity Position #2 | Mils | Read | |
| AV | 32 | REFRIGERANT LEVEL SP | Refrigerant Level Setpoint | % | Read | |
| AV | 33 | ANTI RECYC TIME REMAIN 1 | Motor Anti-Recycle Time Remaining #1 | Sec | Read | |
| AV | 34 | ANTI RECYC TIME REMAIN 2 | Motor Anti-Recycle Time Remaining #2 | Sec | Read | |
| AV | 35 | PRV POSITION 1 | Pre Rotation Vanes Position #1 | % | Read | |
| AV | 36 | PRV POSITION 2 | Pre Rotation Vanes Position #2 | % | Read | |
| AV | 37 | VGD POSITION 1 | VGD Position #1 | % | Read | |
| AV | 38 | VGD POSITION 2 | VGD Position #2 | % | Read | |
| AV | 39 | OIL LEVEL SUMP | Oil Level (Sump) | % | Read | |
| AV | 40 | COMP OP MODE | Compressor Op Mode | Read | 0=Staged, 1=Single, 2=Dual | |
| AV | 41 | COMP REM LOCKOUT MODE | Compressor Remote Lockout | Read | 0=None, 1=Comp #1, 2=Comp #2 | |
| BV | 25 | DISCH VLV OPENING 1 | Discharge Valve Opening #1 | Read | 0=Off, 1=On | |
| BV | 26 | DISCH VLV OPENING 2 | Discharge Valve Opening #2 | Read | 0=Off, 1=On | |
| BV | 27 | DISCH VLV CLOSING 1 | Discharge Valve Closing #1 | Read | 0=Off, 1=On | |
| BV | 28 | DISCH VLV CLOSING 2 | Discharge Valve Closing #2 | Read | 0=Off, 1=On | |
| AV | 44 | HOT GAS BYPASS COMMAND | Hot Gas Bypass Command (Hot Gas Bypass enabled only) | % | Read | |
| AV | 105 | MC 1 INPUT POWER | Input Power #1 (VSD only) | kW | Read | |
| AV | 106 | MC 2 INPUT POWER | Input Power #2 (VSD only) | kW | Read | |
| AV | 107 | MC 1 INPUT KWH | Input Kilowatt Hours #1 (VSD only) | kWh | Read | |
| AV | 108 | MC 2 INPUT KWH | Input Kilowatt Hours #2 (VSD only) | kWh | Read | |
| AV | 109 | VSD 1 OUTPUT VOLTAGE | VSD #1 Output Voltage (VSD only) | Volts | Read | |
| AV | 110 | VSD 2 OUTPUT VOLTAGE | VSD #2 Output Voltage (VSD only) | Volts | Read | |
| AV | 111 | VSD 1 OUTPUT FREQUENCY | VSD #1 Output Frequency (VSD only) | Hz | Read | |
| AV | 112 | VSD 2 OUTPUT FREQUENCY | VSD #2 Output Frequency (VSD only) | Hz | Read | |
| AV | 113 | MOTOR 1 PHASE A CURRENT | Motor #1 Phase A Current (VSD only) | Amps | Read | |
| AV | 114 | MOTOR 2 PHASE A CURRENT | Motor #2 Phase A Current (VSD only) | Amps | Read | |
| AV | 115 | MOTOR 1 PHASE B CURRENT | Motor #1 Phase B Current (VSD only) | Amps | Read | |
| AV | 116 | MOTOR 2 PHASE B CURRENT | Motor #2 Phase B Current (VSD only) | Amps | Read | |
| AV | 117 | MOTOR 1 PHASE C CURRENT | Motor #1 Phase C Current (VSD only) | Amps | Read | |
| AV | 118 | MOTOR 2 PHASE C CURRENT | Motor #2 Phase C Current (VSD only) | Amps | Read | |
| AV | 119 | VSD 1 DC BUS VOLTAGE | VSD #1 DC Bus Voltage (VSD only) | Volts | Read | |
| AV | 120 | VSD 2 DC BUS VOLTAGE | VSD #2 DC Bus Voltage (VSD only) | Volts | Read | |
| AV | 121 | VSD 1 DC BUS CURRENT | VSD #1 DC Bus Current (LVVSD only) | Amps | Read | |
| AV | 122 | VSD 2 DC BUS CURRENT | VSD #2 DC Bus Current (LVVSD only) | Amps | Read | |
| AV | 123 | VSD 1 INTERNAL AMBIENT TEMP | VSD #1 Internal Ambient Temperature (LVVSD only) | °F | Read | |
| AV | 124 | VSD 2 INTERNAL AMBIENT TEMP | VSD #2 Internal Ambient Temperature (LVVSD only) | °F | Read | |
| AV | 125 | VSD 1 CONVERTER HSINK TEMP | VSD #1 Converter Heatsink Temp (LVVSD only) | °F | Read | |
| AV | 126 | VSD 2 CONVERTER HSINK TEMP | VSD #2 Converter Heatsink Temp (LVVSD only) | °F | Read | |
| AV | 127 | FILTER 1 SUPPLY KVA | Harmonic Filter #1 Total Supply KVA (LVVSD/HF only) | kVA | Read | |
| AV | 128 | FILTER 2 SUPPLY KVA | Harmonic Filter #2 Total Supply KVA (LVVSD/HF only) | kVA | Read | |
| BV | 105 | VSD 1 COOLING SYS RUN | VSD #1 Cooling System Run (VSD only) | Read | 0=Not Running, 1=Running | |
| BV | 106 | VSD 2 COOLING SYS RUN | VSD #2 Cooling System Run (VSD only) | Read | 0=Not Running, 1=Running | |
| BV | 107 | VSD 1 HARMONIC FILTER INST | Harmonic Filter #1 Installed (LVVSD only) | Read | 0=False, 1=True | |
| BV | 108 | VSD 2 HARMONIC FILTER INST | Harmonic Filter #2 Installed (LVVSD only) | Read | 0=False, 1=True | |
| AV | 130 | FILTER 1 MAX VOLTAGE THD | Harmonic Filter #1 Max Voltage Total Harmonic Distortion (LVVSD/HF only) | % | Read | |
| AV | 131 | FILTER 2 MAX VOLTAGE THD | Harmonic Filter #2 Max Voltage Total Harmonic Distortion (LVVSD/HF only) | % | Read | |
| AV | 132 | FILTER 1 MAX CURRENT TDD | Harmonic Filter #1 Max Current Total Demand Distortion (LVVSD/HF only) | % | Read | |
| AV | 133 | FILTER 2 MAX CURRENT TDD | Harmonic Filter #2 Max Current Total Demand Distortion (LVVSD/HF only) | % | Read | |
| AV | 138 | MC 1 INPUT KWH LO | Input Kilowatt Hours Low #1 | Read | ||
| AV | 139 | MC 1 INPUT KWH OFFSET | Input Kilowatt Hours Offset #1 | Read | ||
| AV | 140 | MC 2 INPUT KWH LO | Input Kilowatt Hours Low #2 | Read | ||
| AV | 141 | MC 2 INPUT KWH OFFSET | Input Kilowatt Hours Offset #2 | Read | ||
| AV | 142 | OPERATING HOURS LO | Operating Hours Low | Read | ||
| AV | 143 | OPERATING HOURS OFFSET | Operating Hours Offset | Read | ||
| AV | 144 | EVAP SMALL TEMP DIFF | Evaporator Small Temp Difference | °F (diff) | Read | |
| AV | 145 | COND SMALL TEMP DIFF | Condenser Small Temp Difference | °F (diff) | Read | |
| AV | 146 | DISCHARGE SUPERHEAT 1 | Discharge Superheat #1 | °F (diff) | Read | |
| AV | 147 | DISCHARGE SUPERHEAT 2 | Discharge Superheat #2 | °F (diff) | Read | |
| AV | 148 | SUBCOOLLER EFFECTIVENESS | Subcooler Effectiveness | Read | ||
| AV | 149 | SUBCOOLING TEMP | Subcooling Temperature (Drop Leg Temp Enabled only) | °F (diff) | Read | |
| AV | 150 | DELTA P DIV P | Delta P / P | Read | ||
| AV | 151 | HEAD PRESSURE | Head Pressure | PSID | Read | |
| AV | 152 | STALL VOLTAGE 1 | Stall Voltage #1 | Volts | Read | |
| AV | 153 | STALL VOLTAGE 2 | Stall Voltage #1 | Volts | Read | |
| AV | 154 | MTR 1 SHAFT END VIBR | Motor #1 Bearing Shaft End Vibration (motor monitoring option) | Read | ||
| AV | 155 | MTR 2 SHAFT END VIBR | Motor #2 Bearing Shaft End Vibration (motor monitoring option) | Read | ||
| AV | 156 | MTR 1 OP SHAFT END VIBR | Motor #1 Bearing Opposite Shaft End Vibration (motor monitoring option) | Read | ||
| AV | 157 | MTR 2 OP SHAFT END VIBR | Motor #2 Bearing Opposite Shaft End Vibration (motor monitoring option) | Read | ||
| AV | 158 | MTR 1 SHAFT END TEMP | Motor #1 Bearing Shaft End Temperature (motor monitoring option) | °F | Read | |
| AV | 159 | MTR 2 SHAFT END TEMP | Motor #2 Bearing Shaft End Temperature (motor monitoring option) | °F | Read | |
| AV | 160 | MTR 1 OP SHAFT END TEMP | Motor #1 Bearing Opposite Shaft End Temperature (motor monitoring option) | °F | Read | |
| AV | 161 | MTR 2 OP SHAFT END TEMP | Motor #2 Bearing Opposite Shaft End Temperature (motor monitoring option) | °F | Read | |
| AV | 162 | MTR 1 WINDING PH A TEMP | Motor #1 Winding Phase A Temperature (motor monitoring option) | °F | Read | |
| AV | 163 | MTR 2 WINDING PH A TEMP | Motor #2 Winding Phase A Temperature (motor monitoring option) | °F | Read | |
| AV | 164 | MTR 1 WINDING PH B TEMP | Motor #1 Winding Phase B Temperature (motor monitoring option) | °F | Read | |
| AV | 165 | MTR 2 WINDING PH B TEMP | Motor #2 Winding Phase B Temperature (motor monitoring option) | °F | Read | |
| AV | 166 | MTR 1 WINDING PH C TEMP | Motor #1 Winding Phase C Temperature (motor monitoring option) | °F | Read | |
| AV | 167 | MTR 2 WINDING PH C TEMP | Motor #2 Winding Phase C Temperature (motor monitoring option) | °F | Read | |
| AV | 168 | MTR 1 WINDING PH A2 TEMP | Motor #1 Winding Phase A2 Temperature (motor monitoring option) | °F | Read | |
| AV | 169 | MTR 2 WINDING PH A2 TEMP | Motor #2 Winding Phase A2 Temperature (motor monitoring option) | °F | Read | |
| AV | 170 | MTR 1 WINDING PH B2 TEMP | Motor #1 Winding Phase B2 Temperature (motor monitoring option) | °F | Read | |
| AV | 171 | MTR 2 WINDING PH B2 TEMP | Motor #2 Winding Phase B2 Temperature (motor monitoring option) | °F | Read | |
| AV | 172 | MTR 1 WINDING PH C2 TEMP | Motor #1 Winding Phase C2 Temperature (motor monitoring option) | °F | Read | |
| AV | 173 | MTR 2 WINDING PH C2 TEMP | Motor #2 Winding Phase C2 Temperature (motor monitoring option) | °F | Read |
No points match these filters.
Integration notes
- Points list for the SC-EQ (SC-EQUIP) communication card, which replaced the E-Link gateway. The list has no read/write column: the REM remote command/setpoint objects are treated as commandable and MV 65001 Units as writable; everything else as read-only.
- AV 3 and AV 4 are writable remote compressor operation mode (0=Staged, 1=Single, 2=Dual) and compressor lockout (0=None, 1=Comp #1, 2=Comp #2); AV 40 and AV 41 read back the values in use.
- Operating hours and kWh are also split into Low and Offset AVs: total = Offset x 10,000 + Low.
- Units shown are the IP units; with MV 65001 set to SI the card reports °C, kPa and so on.
- 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.
- Long fault and warning code tables are summarised in the MV states; the full text is in the source document.
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 YD Dual-Compressor 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 YD Dual-Compressor Centrifugal Chiller (SC-EQ)
How many BACnet points does the York YD Dual-Compressor Centrifugal Chiller (SC-EQ) have?
This list has 150 BACnet objects: 114 analog values, 27 binary values, 9 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which York YD Dual-Compressor Centrifugal Chiller (SC-EQ) BACnet points are writable?
6 of the 150 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 YD Dual-Compressor Centrifugal Chiller (SC-EQ) BACnet documentation?
The source is YD SC-EQ BAS Points List, revision Rev 2.4, 2021-12-08, published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/ryVLb5Rnf89iVUfsCgygZw/content.
What are the minimum BACnet points to integrate the York YD Dual-Compressor Centrifugal Chiller (SC-EQ)?
Start with BV 1 REM RUN STOP CMD (Remote run/stop (1 = run)); 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 1 (Compressor 1 motor running); BV 6 COMPR MOTOR STATUS 2 (Compressor 2 motor running); MV 8 UNIT CONTROL SOURCE (Control source; ISN (BAS) for BMS control); AV 5 LEAVING CH LIQ TEMP (Leaving chilled liquid temperature); AV 13 MOTOR CURRENT FLA 1 (Compressor 1 motor current, % FLA); MV 2 UNIT SAFETY FAULT CODE (Safety shutdown code (1 = none)).
How do I enable BMS control of the York YD Dual-Compressor Centrifugal Chiller (SC-EQ)?
BV 1 REM RUN STOP CMD (0 = Stop, 1 = Run) is the BAS run/stop, and AV 1-4 are the remote setpoints and compressor mode/lockout. MV 8 Unit Control Source reports Local, ISN (BAS), Analog, Digital, Modem or Remote. The YD list has no per-function source points and no write-enable point, and it doesn't say how the source is chosen at the chiller panel.
How do I check these points on the real YD Dual-Compressor 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
- Air-cooled variable-speed screw chiller
York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)
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 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 - Water-cooled centrifugal chiller (via SC-EQ card)
York YT Centrifugal Chiller (SC-EQ)
YORK YT water-cooled centrifugal chillers with OptiView controls, fitted with the SC-EQ communication card (VSD, solid-state or electro-mechanical starters).
Also known as: YORK YT, YT chiller, OptiView YT, 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: YD SC-EQ BAS Points List · rev. Rev 2.4, 2021-12-08. Object names, instances and units are reproduced as published; descriptions are our own.