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Air-cooled variable-speed screw chiller · BACnet points list
York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) BACnet points list
Updated 28 October 2026
YORK by Johnson Controls YCAV and YCIV chillers with the 031-03478 microboard have BACnet MS/TP, Modbus RTU and N2 built in, so no gateway is needed. The BAS writes a remote setpoint, current limit, sound limit and start/stop (AV 1-3, BV 1). Everything else is read-only analog and binary inputs: chilled liquid and ambient temperatures, per-system pressures, temperatures, % FLA, hours, starts, flash tank values, operational and fault codes, and alarms.
This page lists 112 BACnet objects for the York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) — 4 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
- YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)
- Equipment
- Air-cooled variable-speed screw chiller
- Equipment type
- Chillers
- BACnet objects
- 112 (4 writable)
- Transport
- BACnet MS/TP
- Firmware
- Y.ACS.14.03 to Z.ACS.31.03 (031-03476 program parts listed in the sheet)
- Also known as
- YORK YCAV, YORK YCIV, 031-03478, YCAV_IV Native, Latitude
BMS integration notes: York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)
Put the chiller in remote control (BI 14 reads Remote), then start/stop it with BV 1 and write the remote setpoint (AV 1) and current limit (AV 2). Read each system's state, the leaving chilled liquid temperature and VSD frequency, and the two alarm inputs.
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 | START_STOP | Remote start/stop (1 = run) | Write |
| AV 1 | REM_SETP | Remote leaving chilled liquid setpoint | Write |
| AV 2 | DMD_LIMIT | Remote current limit, % FLA | Write |
| BI 14 | LOCAL_REMOTE | Must read Remote (1) for BMS control | Read |
| AI 86 | S1_SYS_STATE | System 1 state (stopped, running, faulted) | Read |
| AI 1 | LCHLT | Leaving chilled liquid temperature | Read |
| AI 45 | VSD_OUT_FR | Compressor VSD frequency (load indication) | Read |
| BI 1 | S13_ALARM | Systems 1/3 alarm | Read |
| BI 2 | S24_ALARM | Systems 2/4 alarm | Read |
Enable & remote start
BI 14 shows Local or Remote control mode. The sheet gives no point to change it and no write-enable point.
Heartbeat & communication loss
Operational code 67 is 'Loss Of External Communications'; the sheet gives no timeout or heartbeat point.
Network setup
- BACnet MS/TP, Modbus RTU and N2 are native on the 031-03478 board; a gateway is only needed for Connected Services.
- The sheet gives no default MAC address, baud rate or device instance.
Watch out for
- Most data are AI/BI objects, not AV/BV; only the four write points are values.
- Fault and operational codes are per system (AI 50-57); there is no single unit fault code, so alarm on BI 1 and BI 2.
York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AVmin | 1 | REM_SETP | Remote Setpoint | °F | Write | |
| AVmin | 2 | DMD_LIMIT | Remote Current Limit Setpoint | % FLA | Write | |
| AV | 3 | SND_LIMIT | Remote Sound Limit | % | Write | |
| BVmin | 1 | START_STOP | Remote Start / Stop Command | Write | 0=Stop, 1=Run | |
| AImin | 1 | LCHLT | Leaving Chilled Liquid Temperature | °F | Read | |
| AI | 2 | ECHLT | Entering Chilled Liquid Temperature | °F | Read | |
| AI | 3 | VSD_IA_TEMP | VSD Internal Ambient Temperature | °F | Read | |
| AI | 4 | S1_SUCT_TEMP | Sys 1 Suction Temperature | °F | Read | |
| AI | 5 | S2_SUCT_TEMP | Sys 2 Suction Temperature | °F | Read | |
| AI | 6 | S3_SUCT_TEMP | Sys 3 Suction Temperature | °F | Read | |
| AI | 7 | S4_SUCT_TEMP | Sys 4 Suction Temperature | °F | Read | |
| AI | 8 | S1_DSCH_TEMP | Sys 1 Discharge Temperature | °F | Read | |
| AI | 9 | S2_DSCH_TEMP | Sys 2 Discharge Temperature | °F | Read | |
| AI | 10 | S3_DSCH_TEMP | Sys 3 Discharge Temperature | °F | Read | |
| AI | 11 | S4_DSCH_TEMP | Sys 4 Discharge Temperature | °F | Read | |
| AI | 12 | OAT | Ambient Air Temperature | °F | Read | |
| AI | 13 | S1_OIL_TEMP | Sys 1 Oil Temperature | °F | Read | |
| AI | 14 | S2_OIL_TEMP | Sys 2 Oil Temperature | °F | Read | |
| AI | 15 | S3_OIL_TEMP | Sys 3 Oil Temperature | °F | Read | |
| AI | 16 | S4_OIL_TEMP | Sys 4 Oil Temperature | °F | Read | |
| AI | 17 | S1_OIL_PRESS | Sys 1 Oil Pressure | PSI | Read | |
| AI | 18 | S2_OIL_PRESS | Sys 2 Oil Pressure | PSI | Read | |
| AI | 19 | S3_OIL_PRESS | Sys 3 Oil Pressure | PSI | Read | |
| AI | 20 | S4_OIL_PRESS | Sys 4 Oil Pressure | PSI | Read | |
| AI | 21 | S1_SUCT_PRES | Sys 1 Suction Pressure | PSI | Read | |
| AI | 22 | S2_SUCT_PRES | Sys 2 Suction Pressure | PSI | Read | |
| AI | 23 | S3_SUCT_PRES | Sys 3 Suction Pressure | PSI | Read | |
| AI | 24 | S4_SUCT_PRES | Sys 4 Suction Pressure | PSI | Read | |
| AI | 25 | S1_DSCH_PRES | Sys 1 Discharge Pressure | PSI | Read | |
| AI | 26 | S2_DSCH_PRES | Sys 2 Discharge Pressure | PSI | Read | |
| AI | 27 | S3_DSCH_PRES | Sys 3 Discharge Pressure | PSI | Read | |
| AI | 28 | S4_DSCH_PRES | Sys 4 Discharge Pressure | PSI | Read | |
| AI | 29 | S1_MC_FLA | Sys 1 Motor Current FLA | % | Read | |
| AI | 30 | S2_MC_FLA | Sys 2 Motor Current FLA | % | Read | |
| AI | 31 | S3_MC_FLA | Sys 3 Motor Current FLA | % | Read | |
| AI | 32 | S4_MC_FLA | Sys 4 Motor Current FLA | % | Read | |
| AI | 33 | S1_OP_HRS | Sys 1 Operating Hours | Read | ||
| AI | 34 | S2_OP_HRS | Sys 2 Operating Hours | Read | ||
| AI | 35 | S3_OP_HRS | Sys 3 Operating Hours | Read | ||
| AI | 36 | S4_OP_HRS | Sys 4 Operating Hours | Read | ||
| AI | 37 | S1_COMP_ST | Sys 1 Compressor Starts | Read | ||
| AI | 38 | S2_COMP_ST | Sys 2 Compressor Starts | Read | ||
| AI | 39 | S3_COMP_ST | Sys 3 Compressor Starts | Read | ||
| AI | 40 | S4_COMP_ST | Sys 4 Compressor Starts | Read | ||
| AI | 41 | S1_HI_MTR_T | Sys 1 Highest Motor Temperature | °F | Read | |
| AI | 42 | S2_HI_MTR_T | Sys 2 Highest Motor Temperature | °F | Read | |
| AI | 43 | S3_HI_MTR_T | Sys 3 Highest Motor Temperature | °F | Read | |
| AI | 44 | S4_HI_MTR_T | Sys 4 Highest Motor Temperature | °F | Read | |
| AImin | 45 | VSD_OUT_FR | VSD Output Frequency | Hz | Read | |
| AI | 46 | S1_FEED | Sys 1 Flash Tank Feed Valve % | % | Read | |
| AI | 47 | S2_FEED | Sys 2 Flash Tank Feed Valve % | % | Read | |
| AI | 48 | S3_FEED | Sys 3 Flash Tank Feed Valve % | % | Read | |
| AI | 49 | S4_FEED | Sys 4 Flash Tank Feed Valve % | % | Read | |
| AI | 50 | S1_OP_CODE | Sys 1 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch OFF, 66=Remote Controlled Shutdown, 67=Loss Of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 71=Password Shutdown (AGR), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch OFF, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 83=ISN/BAS Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Pre-Charging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=System HPCO (Fan Special) | |
| AI | 51 | S2_OP_CODE | Sys 2 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch OFF, 66=Remote Controlled Shutdown, 67=Loss Of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 71=Password Shutdown (AGR), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch OFF, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 83=ISN/BAS Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Pre-Charging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=System HPCO (Fan Special) | |
| AI | 52 | S3_OP_CODE | Sys 3 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch OFF, 66=Remote Controlled Shutdown, 67=Loss Of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 71=Password Shutdown (AGR), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch OFF, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 83=ISN/BAS Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Pre-Charging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=System HPCO (Fan Special) | |
| AI | 53 | S4_OP_CODE | Sys 4 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch OFF, 66=Remote Controlled Shutdown, 67=Loss Of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 71=Password Shutdown (AGR), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch OFF, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 83=ISN/BAS Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Pre-Charging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=System HPCO (Fan Special) | |
| AI | 54 | S1_FTL_CODE | Sys 1 Fault Code | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Pre-charge Low DC Bus Voltage (Unit), 9=Pre-charge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 32=High Oil Temperature, 33=Low Suction Superheat, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Pre-charge Low DC Bus Voltage (System 1/3, 2/4), 38=Pre-charge DC Bus Voltage Imbalance (System 1/3, 2/4), 39=High DC Bus Voltage (System 1/3, 2/4), 40=Low DC Bus Voltage (System 1/3, 2/4), 41=DC Bus Voltage Imbalance (System 1/3, 2/4), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System 1/3, 2/4), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware - HPCO), 49=High Flash Tank Level, 50=Control Voltage Fault, 51=Low Discharge Superheat | |
| AI | 55 | S2_FLT_CODE | Sys 2 Fault Code | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Pre-charge Low DC Bus Voltage (Unit), 9=Pre-charge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 32=High Oil Temperature, 33=Low Suction Superheat, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Pre-charge Low DC Bus Voltage (System 1/3, 2/4), 38=Pre-charge DC Bus Voltage Imbalance (System 1/3, 2/4), 39=High DC Bus Voltage (System 1/3, 2/4), 40=Low DC Bus Voltage (System 1/3, 2/4), 41=DC Bus Voltage Imbalance (System 1/3, 2/4), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System 1/3, 2/4), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware - HPCO), 49=High Flash Tank Level, 50=Control Voltage Fault, 51=Low Discharge Superheat | |
| AI | 56 | S3_FTL_CODE | Sys 3 Fault Code | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Pre-charge Low DC Bus Voltage (Unit), 9=Pre-charge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 32=High Oil Temperature, 33=Low Suction Superheat, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Pre-charge Low DC Bus Voltage (System 1/3, 2/4), 38=Pre-charge DC Bus Voltage Imbalance (System 1/3, 2/4), 39=High DC Bus Voltage (System 1/3, 2/4), 40=Low DC Bus Voltage (System 1/3, 2/4), 41=DC Bus Voltage Imbalance (System 1/3, 2/4), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System 1/3, 2/4), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware - HPCO), 49=High Flash Tank Level, 50=Control Voltage Fault, 51=Low Discharge Superheat | |
| AI | 57 | S4_FLT_CODE | Sys 4 Fault Code | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Pre-charge Low DC Bus Voltage (Unit), 9=Pre-charge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 32=High Oil Temperature, 33=Low Suction Superheat, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Pre-charge Low DC Bus Voltage (System 1/3, 2/4), 38=Pre-charge DC Bus Voltage Imbalance (System 1/3, 2/4), 39=High DC Bus Voltage (System 1/3, 2/4), 40=Low DC Bus Voltage (System 1/3, 2/4), 41=DC Bus Voltage Imbalance (System 1/3, 2/4), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System 1/3, 2/4), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware - HPCO), 49=High Flash Tank Level, 50=Control Voltage Fault, 51=Low Discharge Superheat | |
| AI | 58 | S1_LEVEL | Sys 1 Flash Tank Level % | % | Read | |
| AI | 59 | S2_LEVEL | Sys 2 Flash Tank Level % | % | Read | |
| AI | 60 | S3_LEVEL | Sys 3 Flash Tank Level % | % | Read | |
| AI | 61 | S4_LEVEL | Sys 4 Flash Tank Level % | % | Read | |
| AI | 62 | S1_FAN_STG | Sys 1 Condenser Fan Stage | Read | ||
| AI | 63 | S2_FAN_STG | Sys 2 Condenser Fan Stage | Read | ||
| AI | 64 | S3_FAN_STG | Sys 3 Condenser Fan Stage | Read | ||
| AI | 65 | S4_FAN_STG | Sys 4 Condenser Fan Stage | Read | ||
| AI | 66 | LEAD | Lead refrigerant system number | Read | ||
| AI | 67 | LCHLT_SETP | Leaving Chilled Liquid Setpoint | °F | Read | |
| AI | 68 | LCHLT_CUTOUT | Leaving Chilled Liquid Cutout | °F | Read | |
| AI | 69 | S1_DRAIN | Sys 1 Flash Tank Drain Valve % | % | Read | |
| AI | 70 | S2_DRAIN | Sys 2 Flash Tank Drain Valve % | % | Read | |
| AI | 71 | S3_DRAIN | Sys 3 Flash Tank Drain Valve % | % | Read | |
| AI | 72 | S4_DRAIN | Sys 4 Flash Tank Drain Valve % | % | Read | |
| AI | 73 | SUCT_PRS_CUT | Suction Pressure Cutout | PSI | Read | |
| AI | 74 | VSD_DCB_V_13 | VSD DC Bus Voltage Sys 1/3 | Volts | Read | |
| AI | 75 | VSD_DCB_V_24 | VSD DC Bus Voltage Sys 2/4 | Volts | Read | |
| AI | 76 | REM_SETPOINT | Remote Leaving Chilled Liquid Setpoint | °F | Read | |
| AI | 77 | S1_SUC_SHEAT | Sys 1 Suction Superheat | °F (diff) | Read | |
| AI | 78 | S2_SUC_SHEAT | Sys 2 Suction Superheat | °F (diff) | Read | |
| AI | 79 | S3_SUC_SHEAT | Sys 3 Suction Superheat | °F (diff) | Read | |
| AI | 80 | S4_SUC_SHEAT | Sys 4 Suction Superheat | °F (diff) | Read | |
| AI | 81 | COOLING_RNG | Cooling Range | °F | Read | |
| AI | 82 | S1_DSC_SHEAT | Sys 1 Discharge Superheat | °F (diff) | Read | |
| AI | 83 | S2_DSC_SHEAT | Sys 2 Discharge Superheat | °F (diff) | Read | |
| AI | 84 | S3_DSC_SHEAT | Sys 3 Discharge Superheat | °F (diff) | Read | |
| AI | 85 | S4_DSC_SHEAT | Sys 4 Discharge Superheat | °F (diff) | Read | |
| AImin | 86 | S1_SYS_STATE | Sys 1 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| AI | 87 | S2_SYS_STATE | Sys 2 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| AI | 88 | S3_SYS_STATE | Sys 3 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| AI | 89 | S4_SYS_STATE | Sys 4 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| AI | 90 | S1_MTR_OVER | Sys 1 Motor Current Overload Setting | Amps | Read | |
| AI | 91 | S2_MTR_OVER | Sys 2 Motor Current Overload Setting | Amps | Read | |
| AI | 92 | S3_MTR_OVER | Sys 3 Motor Current Overload Setting | Amps | Read | |
| AI | 93 | S4_MTR_OVER | Sys 4 Motor Current Overload Setting | Amps | Read | |
| BImin | 1 | S13_ALARM | Sys 1/3 Alarm | Read | 0=No Alarm, 1=Alarm | |
| BImin | 2 | S24_ALARM | Sys 2/4 Alarm | Read | 0=No Alarm, 1=Alarm | |
| BI | 3 | EVAP_HEATER | Evaporator Heater Status | Read | ||
| BI | 4 | EVAP_PUMP | Evaporator Pump Status | Read | ||
| BI | 5 | S1_COMP_RUN | Sys 1 Compressor Run Status | Read | ||
| BI | 6 | S2_COMP_RUN | Sys 2 Compressor Run Status | Read | ||
| BI | 7 | S3_COMP_RUN | Sys 3 Compressor Run Status | Read | ||
| BI | 8 | S4_COMP_RUN | Sys 4 Compressor Run Status | Read | ||
| BI | 9 | S1_ECON_SV | Sys 1 Economizer Solenoid Valve Status | Read | ||
| BI | 10 | S2_ECON_SV | Sys 2 Economizer Solenoid Valve Status | Read | ||
| BI | 11 | S3_ECON_SV | Sys 3 Economizer Solenoid Valve Status | Read | ||
| BI | 12 | S4_ECON_SV | Sys 4 Economizer Solenoid Valve Status | Read | ||
| BI | 13 | WATER_GLYCOL | Cooling Type | Read | 0=Water, 1=Glycol | |
| BImin | 14 | LOCAL_REMOTE | Local Remote Control Mode | Read | 0=Local, 1=Remote | |
| BI | 15 | DISP_UNITS | Display Units | Read | 0=Imperial, 1=SI |
No points match these filters.
Integration notes
- Access follows the sheet's sections: analog and binary write points (AV 1-3, BV 1) and read-only points (AI, BI).
- Points for systems 3 and 4 only report on units with that many systems; values that don't apply are sent as zero.
- Operational and fault codes are numeric AIs; the states list the code values from the sheet's code table.
- Spare objects (AV 4, BV 2-3) are left out. Units shown are imperial; SI units are in the sheet (pressures in bar).
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 YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) 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 YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)
How many BACnet points does the York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) have?
This list has 112 BACnet objects: 93 analog inputs, 3 analog values, 15 binary inputs, 1 binary value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) BACnet points are writable?
4 of the 112 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 York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) BACnet documentation?
The source is YCAV YCIV Modbus, BACnet MS/TP, N2 Data Map (YCAV_IV Native), revision 2017-02-17, published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/DsvsbvlZNgkCrndB1NvZpg/content.
What are the minimum BACnet points to integrate the York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)?
Start with BV 1 START_STOP (Remote start/stop (1 = run)); AV 1 REM_SETP (Remote leaving chilled liquid setpoint); AV 2 DMD_LIMIT (Remote current limit, % FLA); BI 14 LOCAL_REMOTE (Must read Remote (1) for BMS control); AI 86 S1_SYS_STATE (System 1 state (stopped, running, faulted)); AI 1 LCHLT (Leaving chilled liquid temperature); AI 45 VSD_OUT_FR (Compressor VSD frequency (load indication)); BI 1 S13_ALARM (Systems 1/3 alarm); BI 2 S24_ALARM (Systems 2/4 alarm).
How do I enable BMS control of the York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)?
BI 14 shows Local or Remote control mode. The sheet gives no point to change it and no write-enable point.
Does the York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP) need a BACnet heartbeat or have a communication timeout?
Operational code 67 is 'Loss Of External Communications'; the sheet gives no timeout or heartbeat point.
How do I check these points on the real YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)?
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.
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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: YCAV YCIV Modbus, BACnet MS/TP, N2 Data Map (YCAV_IV Native) · rev. 2017-02-17. Object names, instances and units are reproduced as published; descriptions are our own.