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Air-to-water heat pump / air-cooled chiller controller · BACnet points list

Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) BACnet points list

Updated 4 November 2026

Short answer

The EWAK-CZ chillers and EWYK-CZ heat pumps use a MicroTech controller running the ICARO software. BACnet MS/TP comes from a POL904 module and BACnet IP from a POL908 module. The list covers unit enable, cool/heat mode and network setpoints, capacity and current limits, domestic hot water, bivalent (boiler backup) and collective housing functions, variable-flow pump data, per-circuit compressor data, alarm words and master/slave status.

This page lists 96 BACnet objects for the Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) — 34 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Daikin Applied’s own free documentation, linked below.

Manufacturer
Daikin Applied
Model
EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)
Equipment
Air-to-water heat pump / air-cooled chiller controller
Equipment type
Chillers
BACnet objects
96 (34 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Default device instance
1 (BACnet IP module); MS/TP module derives it from the production number and date code
Also known as
EWYK-CZ, EWAK-CZ, EWYK CZ, EWAK CZ, EWA(Y)K-CZ, ICARO, D-EIGOC00104
Source document
BAS integration guide - BACnet protocol (EWAK-CZ/EWYK-CZ, ICARO) · D-EIGOC00104-26_00EN-EWYK-CZ
Download CSV 96 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 Daikin Applied’s current documentation and the live device before use. Not official Daikin Applied information. Terms of use.

BMS integration notes: Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)

Integration in brief

Set the unit to network control, then enable it with ChillerEnableStp (BV 2) and write the operating mode (MV 3) and the cool or heat setpoint at priority 8. Monitor unit status, leaving water temperature, the general alarm and the 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.

ObjectNameWhyAccess
BV 2ChillerEnableStpNetwork enable/disable of the unitCommand
MV 3ChillerOperationModeCool / heat mode commandCommand
AV 4NetworkCoolTempSetpointLeaving water cool setpoint from the BMSCommand
AV 6NetworkHeatTempSetpointLeaving water heat setpoint from the BMSCommand
AV 3CapacityLimitSetptCapacity limit from the BMSCommand
BV 8ClearAlarmClear alarms from the networkCommand
BI 3ChillerLocalRemoteShows whether network control is activeRead
MV 1UnitStatusUnit run stateRead
AI 2LvgEvapWaterTempUnitLeaving water temperatureRead
BI 10AlarmDigitalOutputAny active unit alarmRead

Enable & remote start

ChillerLocalRemote (BI 3) shows 0 = Local / 1 = Network and is read-only; the guide lists no writable local/network selector, so network control is chosen at the unit. With network control active the BMS writes ChillerEnableStp (BV 2) = Enable, then the mode (MV 3) and the network setpoints.

Network setup

Watch out for

Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) 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.

96 of 96 shown
Type
Multi-state
Access
Show
Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) BACnet Points List
DescriptionStates
BImin3ChillerLocalRemoteLocal/Network SourceRead0=Local; 1=Network
BI7ChillerEnableOutputEnabled StateRead0=Disabled; 1=Enabled
BI6ChillerLimitedCapacity LimitedRead0=No; 1=Yes
BImin10AlarmDigitalOutputUnit general alarmRead0=No; 1=Yes
BI4ThermostatStatusThermoregulation StateRead0=Off; 1=On
BVmin2ChillerEnableStpUnit Enable Setpoint - NetworkCommand0=Disable; 1=Enable
BVmin8ClearAlarmClear Alarms - NetworkCommand0=Normal; 1=Clear
MV2ActiveModeOperation Mode (reduced)Read1=Not Used; 2=Cool; 3=Heat; 4=Not Used; 5=Defrost
AV5ActiveLvgWaterTargetActive Setpoint (reduced)°CRead
AV2ChillerCapacityActual Capacity (reduced)%Read
AV1ActiveCapacityLimitActive Capacity Limit Output (reduced)%Read
MVmin1UnitStatusStatus (reduced)Read1=Off; 2=Start; 3=Run; 4=Preshutdown; 5=Service
AI1EntEvapWaterTempEvaporator Entering Water Temp°CRead
AImin2LvgEvapWaterTempUnitEvaporator Leaving Water Temp Unit°CRead
AI5OutdoorAirTempOutdoor Air Temperature°CRead
AV903AVWarningAlarmCodeWarning CODE (reduced)Read0=No Alarm; 1=External event
AV904AVProblemAlarmCodeProblem CODE (reduced)Read0=No Alarm; 1=Circuit Alarm
AV905AVFaultAlarmCodeFault CODE (reduced)Read0=No Alarm; 1=Unit or both Circuit Alarm
MVmin3ChillerOperationModeOperation Mode Setpoint - NetworkCommand0=NULL; 1=Not Used; 2=Cool; 3=Heat; 4=Not Used
AVmin4NetworkCoolTempSetpointCool Setpoint - Network°CCommand
AVmin6NetworkHeatTempSetpointHeat Setpoint - Network°CCommand
AVmin3CapacityLimitSetptCapacity Limit Setpoint - Network%Command
AV39CurrentLimitSetptCurrent Limit Setpoint - NetworkACommand
MV47UnitsUnit of Measure (reduced)Write1=Metric; 2=Imperial
MV48SilentModeSetptNoise Reduction Enable Setpoint (reduced)Write1=Off; 2=On
MV62DefrostOpStateDefrost - Operating State (reduced)Read0=Off; 1=On
MV70BivOpsEnableStpBivalent Operation - Enable Setpoint (reduced)Write0=Off; 1=On
AV71BivOps'TCutOffBivalent Operation - Temperature Cut-Off (reduced)°CWrite
AV72BivOps'TbivalentBivalent Operation - Temperature Bivalent Mode (reduced)°CWrite
AV73BivOps'BoilerStDelayBivalent Operation - Boiler Start Delay (reduced)minWrite
MV80ColHsng'EnableStpCollective Housing - Enable Setpoint (reduced)Write0=Off; 1=On
AI81CollHsng'TankTempCollective Housing - Tank Temperature°CRead
AV82CollHsng'CngovrUpperLimCollective Housing - Changeover Upper Limit (reduced)°CWrite
AV83CollHsng'CngovrLowerLimCollective Housing - Changeover Lower Limit (reduced)°CWrite
AV84CollHsng'TankTempStpCollective Housing - Tank Temperature Stp (reduced)°CWrite
BV90DHWRemoteEnDHW Enable SetpointCommand0=Off; 1=On
AV91DHWTempSpDHW Temperature Setpoint (reduced)°CWrite
AI92DHWWaterTempDHW Temperature°CRead
MV93DHW3WVStateDHW Switching Valve State (reduced)Read1=DHW Off; 2=Switching; 3=DHW Run; 4=Error
MV94DHWAntiLegCycleDHW Anti Legionella Cycle (reduced)Read0=Off; 1=On
MV95DHWStandbyModeDHW Standby Mode (reduced)Write0=Off; 1=On
BI101EvapPumpSta1Evaporator Pump #1 StatusRead0=Pump Off Request; 1=Pump On Request
AV102EvapPumpRunHrs1Evaporator Pump #1 Run Hours (reduced)hWrite
AV150VPF'FixSpeedSetpt1Evaporator VFD Pump - Fixed Speed 1 (reduced)%Write
AV151VPF'FixSpeedSetpt2Evaporator VFD Pump - Fixed Speed 2 (reduced)%Write
AV152VPF'StbySpeedSetptEvaporator VFD Pump - Standby Speed (reduced)%Write
AV153VPF'ActSpeedEvaporator VFD Pump - Actual Speed (reduced)%Read
AV154VPF'LoadDifPresSetptEvaporator VFD Pump - Building Differential Pressure Setpoint (reduced)kPaWrite
AV155VPF'EvapDifPresSetptEvaporator VFD Pump - Unit Differential Pressure Setpoint (reduced)kPaWrite
AI156VPF'LoadDifPresEvaporator VFD Pump - Building Differential PressurekPaRead
AI157VPF'EvapDifPressEvaporator VFD Pump - Unit Differential PressurekPaRead
MV158VPF'BypVlvStaEvaporator VFD Pump - Bypass Valve State (reduced)Read1=Closed; 2=Opened
AV159VPF'DeltaTempSpEvaporator VFD Pump - DeltaTemperature Setpoint (reduced)dKWrite
AV160VPF'DeltaTempEvaporator VFD Pump - DeltaTemperature (reduced)dKRead
MV201SiemensControllerSiemens Controller type (reduced)Read1=N/A; 2=POL687; 3=POL638; 4=POL687.00; 5=POL687.70; 6=POL688.80; 7=POL688.80UPS; 8=POL468
MV202ApplSaveSpApplication Save (reduced)Write1=Off; 2=On
BV288ExternalAlarmExternal AlarmRead0=No Alarm; 1=InAlarm
BV289UnitExternalEventExternal EventRead0=No Event; 1=Event
AV295UnitAlarmsWord4Unit Alarm Word #5 (reduced)Read
AV296UnitAlarmsWord4Unit Alarm Word #4 (reduced)Read
AV297UnitAlarmsWord3Unit Alarm Word #3 (reduced)Read
AV298UnitAlarmsWord2Unit Alarm Word #2 (reduced)Read
AV299UnitAlarmsWord1Unit Alarm Word #1 (reduced)Read
MV300C1StateCircuit #1 State (reduced)Read1=Off; 2=Preopen; 3=Run; 4=Pumpdown
BV321C1Comp1StatusCircuit #1 Comp #1 - StatusRead0=Off; 1=On
AV322C1Comp1StartsCircuit #1 Comp #1 - Starts (reduced)Write
AV323C1Comp1HoursCircuit #1 Comp #1 - Run Hours (reduced)Write
AV325C1Comp1ActCapCircuit #1 Comp #1 - Actual Capacity (reduced)%Read
AV326C1Comp1RLACircuit #1 Comp #1 - Percent RLA (reduced)%Read
AV396C1AlarmWord4Circuit #1 or Cir1Comp1 Alarm Word #4 (reduced)Write
AV397C1AlarmWord3Circuit #1 or Cir1Comp1 Alarm Word #3 (reduced)Read
AV398C1AlarmWord2Circuit #1 or Cir1Comp1 Alarm Word #2 (reduced)Read
AV399C1AlarmWord1Circuit #1 or Cir1Comp1 Alarm Word #1 (reduced)Read
MV400C2StateCircuit #2 State (reduced)Read1=Off; 2=Preopen; 3=Run; 4=Pumpdown
BV421C2Comp1StatusCircuit #2 Comp #1 - StatusRead0=Off; 1=On
AV422C2Comp1StartsCircuit #2 Comp #1 - Starts (reduced)Write
AV423C2Comp1HoursCircuit #2 Comp #1 - Run Hours (reduced)Write
AV425C2Comp1ActCapCircuit #2 Comp #1 - Actual Capacity (reduced)%Read
AV426C2Comp1RLACircuit #2 Comp #1 - Percent RLA (reduced)%Read
AV496C2AlarmWord4Circuit #2 or Cir2Comp1 Alarm Word #4 (reduced)Read
AV497C2AlarmWord3Circuit #2 or Cir2Comp1 Alarm Word #3 (reduced)Read
AV498C2AlarmWord2Circuit #2 or Cir2Comp1 Alarm Word #2 (reduced)Read
AV499C2AlarmWord1Circuit #2 or Cir2Comp1 Alarm Word #1 (reduced)Read
AI151SysCtrlTmpM/S Leaving Water Temperature°CRead
BV502CommonLWTSenfM/S LWT Sensor FaultRead0=No Alarm; 1=In Alarm
MV5StandaloneModeSpM/S Disconnect Setpoint (reduced)Write1=No; 2=Yes
BV20MasterCommErrMaster Comm ErrorRead0=No Alarm; 1=In Alarm
BV21Slave1CommErrSlave 1 Comm ErrorRead0=No Alarm; 1=In Alarm
BV22Slave2CommErrSlave 2 Comm ErrorRead0=No Alarm; 1=In Alarm
BV23Slave3CommErrSlave 3 Comm ErrorRead0=No Alarm; 1=In Alarm
AV1150Slave1LoadSlave Load #1 (reduced)%Read
MV1154Slave1StateSlave State #1 (reduced)Read1=Stop; 2=Run; 3=Alarm; 4=ComErr
AV1168Slave2LoadSlave Load #2 (reduced)%Read
MV1172Slave2StateSlave State #2 (reduced)Read1=Stop; 2=Run; 3=Alarm; 4=ComErr
AV1186Slave3LoadSlave Load #3 (reduced)%Read
MV1190Slave3StateSlave State #3 (reduced)Read1=Stop; 2=Run; 3=Alarm; 4=ComErr
Object ID lookup: Daikin Applied EWAK-CZ / EWYK-CZ 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 EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) 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 Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)

How many BACnet points does the Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) have?

This list has 96 BACnet objects: 8 analog inputs, 50 analog values, 6 binary inputs, 12 binary values, 20 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) BACnet points are writable?

34 of the 96 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 Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe) BACnet documentation?

The source is BAS integration guide - BACnet protocol (EWAK-CZ/EWYK-CZ, ICARO) (D-EIGOC00104-26_00EN-EWYK-CZ), published free by Daikin Applied at https://www.daikinapplied.uk/hubfs/portale-documentale/D_EIGOC00104_26_00EN_EWYK_CZ.pdf.

What are the minimum BACnet points to integrate the Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)?

Start with BV 2 ChillerEnableStp (Network enable/disable of the unit); MV 3 ChillerOperationMode (Cool / heat mode command); AV 4 NetworkCoolTempSetpoint (Leaving water cool setpoint from the BMS); AV 6 NetworkHeatTempSetpoint (Leaving water heat setpoint from the BMS); AV 3 CapacityLimitSetpt (Capacity limit from the BMS); BV 8 ClearAlarm (Clear alarms from the network); BI 3 ChillerLocalRemote (Shows whether network control is active); MV 1 UnitStatus (Unit run state); AI 2 LvgEvapWaterTempUnit (Leaving water temperature); BI 10 AlarmDigitalOutput (Any active unit alarm).

How do I enable BMS control of the Daikin Applied EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)?

ChillerLocalRemote (BI 3) shows 0 = Local / 1 = Network and is read-only; the guide lists no writable local/network selector, so network control is chosen at the unit. With network control active the BMS writes ChillerEnableStp (BV 2) = Enable, then the mode (MV 3) and the network setpoints.

How do I check these points on the real EWAK-CZ / EWYK-CZ air-to-water heat pump and chiller (Daikin Applied Europe)?

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 Daikin Applied BACnet points lists

Source: BAS integration guide - BACnet protocol (EWAK-CZ/EWYK-CZ, ICARO) · D-EIGOC00104-26_00EN-EWYK-CZ. Object names, instances and units are reproduced as published; descriptions are our own.