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Water source heat pump controller · BACnet points list
Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage BACnet points list
Updated 28 October 2026
Enfinity single-stage water source heat pumps with the MicroTech III unit controller join a BACnet MS/TP trunk through the plug-in BACnet communication module. The point list covers water and air temperatures, occupancy setpoints and differentials, compressor timers, network space temperature and setpoint inputs, alarm status and occupancy, mode and fan controls. Points marked as configuration properties are stored in non-volatile memory, so they should not be written continuously.
This page lists 66 BACnet objects for the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage — 39 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
- MicroTech III WSHP Controller - Enfinity Single Stage
- Equipment
- Water source heat pump controller
- Equipment type
- Heat pumps
- BACnet objects
- 66 (39 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 3101000 + MS/TP MAC address (e.g. 3101007)
- Also known as
- Enfinity, MHC, MHW, CCH, CCW, VFC, VFW, LVC, LVW, VHC, VHF, MicroTech III water source heat pump, ED 15103
BMS integration notes: Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage
Join the heat pump to the MS/TP trunk with a unique MAC and instance, then command occupancy and application mode and supply the space temperature or setpoint from the BMS if needed. Use Receive Heartbeat if overrides must fall back when the BMS goes quiet.
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 |
|---|---|---|---|
| MV 7 | OccManCmd | Occupancy override from the BMS | Command |
| MV 10 | ApplicMode | Application mode (Auto/Heat/Cool/Off/Fan Only/Dehumid) | Command |
| AV 19 | Setpoint | Network reference setpoint | Command |
| BV 1 | ClearAlarm | Clear the current alarm | Write |
| MV 4 | McQWSHPStatus | Unit operating status | Read |
| AV 22 | EffectSpaceTemp | Space temperature used for control | Read |
| AI 2 | LWT | Leaving water temperature | Read |
| MV 2 | CurrentAlarm | Highest-priority active alarm | Read |
Enable & remote start
No local/remote switch is described. Network override objects take effect when written: Application Mode Input (MV 10) selects Auto/Heat/Cool/Off/Fan Only/Dehumid, Occupancy Override Input (MV 7) and Occupancy Scheduler Input (MV 8) set occupancy, and Compressor Enable Input (MV 1) permits compressor operation. Overrides revert to their default (Null) values after a controller reboot.
Heartbeat & communication loss
Receive Heartbeat (AV 20, cpRcvHrtBt, 0-6553.4 s, default 0 = disabled) is the maximum time a supported override may go without being rewritten before it reverts to its default. Each supported point has its own timer: AV 18, AV 35, MV 1, MV 8, MV 9, MV 10, MV 11 and MV 12. Send Heartbeat is not supported by the BACnet module; use COV instead.
Sensors & values from the BMS
Write the space temperature to Space Temperature Input (AV 18); Effective Space Temperature (AV 22) uses the local AI 1 sensor unless AV 18 holds a valid value. Temperature Setpoint Input (AV 19) sets the reference setpoint for Occupied/Standby, but local setpoint adjust must first be disabled with MV 14. Temperature Setpoint Offset Input (AV 35) shifts the occupied/standby setpoints. Occupancy Sensor Input (MV 9) accepts a network occupancy sensor.
Network setup
- Default device instance is 3101000 plus the MS/TP MAC address (example 3101007); System Minimum Instance (AV 412) sets the base.
- MS/TP baud rate (9600, 19200, 38400 or 76800) must be set in the BACnet module's serial configuration menu (DB-9 port, 19200 8-N-1).
- MS/TP MAC address comes from address switch S3; it can only be set from the BAS or menu when S3 is at 255.
- Set MaxMasters to the highest MS/TP master address on the segment to cut token traffic.
Watch out for
- Configuration (cp...) objects are stored in non-volatile memory with a limited write life; do not write them cyclically.
- Network overrides revert to default on controller reboot, so the BMS must restore them.
- ReinitializeDevice password is McQuay (or MicroTech on newer software); a cold reset restores module defaults.
Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage 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 | |||||
|---|---|---|---|---|---|---|
| AI | 1 | LocalSpaceTemp | Local Space Temperature Output | °F | Read | |
| AImin | 2 | LWT | Leaving Water Temperature | °F | Read | |
| AI | 3 | EWT | Entering Water Temperature | °F | Read | |
| AI | 4 | DischAirTemp | Discharge Air Temperature | °F | Read | |
| AI | 5 | LocalSetpt | Local Setpoint Adjust Output | °F | Read | |
| AI | 6 | SuctionTemp1 | Compressor #1 Suction Temperature | °F | Read | |
| AI | 7 | SuctionTemp2 | Compressor #2 Suction Temperature | °F | Read | |
| AI | 8 | Brownout | Brownout Voltage Reading | counts | Read | |
| AV | 1 | cpOccupied_Cool_Setpt | Occupied Cooling Setpoint | °F | Write | |
| AV | 2 | cpStandby_Cool_Setpt | Standby Cool Setpoint | °F | Write | |
| AV | 3 | cpUnoccupied_Cool_Setpt | Unoccupied Cool Setpoint | °F | Write | |
| AV | 4 | cpOccupied_Heat_Setpt | Occupied Heat Setpoint | °F | Write | |
| AV | 5 | cpStandby_Heat_Setpt | Standby Heat Setpoint | °F | Write | |
| AV | 6 | cpUnoccupied_Heat_Setpt | Unoccupied Heat Setpoint | °F | Write | |
| AV | 7 | cpBypassTime | Local Bypass Time Setpoint | min | Write | |
| AV | 8 | cpCoolIntStgTmr | Cooling Interstage Timer | s | Write | |
| AV | 9 | cpBrownoutRef | Brownout Reference Setpoint | Write | ||
| AV | 10 | cpOccDiff | Occupied Setpoint Differential | °F | Write | |
| AV | 11 | cpLowTempProtGL | Compressor Low Suction Temp Protection SP for Glycol | °F | Write | |
| AV | 12 | cpLowTempProt | Compressor Low Suction Temp Protection SP for Water | °F | Write | |
| AV | 13 | cpLowTmpProtDif | Compressor Low Suction Temp Protection Differential | °F | Write | |
| AV | 14 | cpHeatIntStgTmr | Heating Interstage Timer | s | Write | |
| AV | 15 | cpMinCompOffTmr | Compressor Minimum OFF Timer | s | Write | |
| AV | 16 | cpMinCompOnTmr | Compressor Minimum ON Timer | s | Write | |
| AV | 17 | cpUnoccDiff | Unoccupied Setpoint Differential | °F | Write | |
| AV | 18 | NetworkSpaceTemp | Space Temperature Input | °F | Command | |
| AVmin | 19 | Setpoint | Temperature Setpoint Input | °F | Command | |
| AV | 20 | cpRcvHrtBt | Receive Heartbeat | s | Write | |
| AV | 21 | cpSndHrtBt | Send Heartbeat | s | Write | |
| AVmin | 22 | EffectSpaceTemp | Effective Space Temperature Output | °F | Read | |
| AV | 23 | EffectSetpt | Effective Setpoint Output | °F | Read | |
| AV | 24 | Occupied_CoolShift | Occupied Cooling Setpoint Shift Output | °F | Read | |
| AV | 25 | Standby_CoolShift | Standby Cooling Setpoint Shift Output | °F | Read | |
| AV | 26 | Unoccupied_CoolShift | Unoccupied Cooling Setpoint Shift Output | °F | Read | |
| AV | 27 | Occupied_HeatShift | Occupied Heating Setpoint Shift Output | °F | Read | |
| AV | 28 | Standby_HeatShift | Standby Heating Setpoint Shift Output | °F | Read | |
| AV | 29 | Unoccupied_HeatShift | Unoccupied Heating Setpoint Shift Output | °F | Read | |
| AV | 30 | cpClgSptHiLim | Cooling Setpoint High Limit (software v3.2 and older) | °F | Write | |
| AV | 31 | cpClgSptLoLim | Cooling Setpoint Low Limit | °F | Write | |
| AV | 32 | cpHtgSptHiLim | Heating Setpoint High Limit | °F | Write | |
| AV | 33 | cpHtgSptLoLim | Heating Setpoint Low Limit (software v3.2 and older) | °F | Write | |
| AV | 34 | cpLowPresAlmDly | Compressor Low Pressure Alarm Delay | s | Write | |
| AV | 35 | SetptOffset | Temperature Setpoint Offset Input | °F | Command | |
| AV | 411 | MacAddress | MAC address; named MacAddressSwitch when address switch is set | Write | ||
| AV | 412 | SystemMinInstance | System Minimum Instance | Write | ||
| BI | 1 | BinaryIn | Binary Input Status | Read | ||
| BVmin | 1 | ClearAlarm | Clear Alarm | Write | 0=Normal, 1=Clear Alarm | |
| BV | 2 | BinaryOut | Binary Output Status | Read | ||
| MI | 1 | CondOverFlow | Condensate Overflow Status | Read | 1=Dry, 2=Wet, 3=Null (no sensor present) | |
| MI | 2 | FanOnAuto | Fan ON/Auto Switch Status (Room Sensor) | Read | 1=On, 2=Auto, 3=Null (no switch present) | |
| MI | 3 | HeatCoolAuto | System Mode Switch (Heat/Cool/Auto) Status | Read | 1=Off, 2=Heat, 3=Cool, 4=Auto, 5=Null (no switch present) | |
| MV | 1 | ComprEnable | Compressor Enable Input | Command | 1=Disabled, 2=Enabled, 3=Null (compressors are enabled) | |
| MVmin | 2 | CurrentAlarm | Current Alarm | Read | 1=No Alarms, 2=Low Voltage Brownout, 3=Comp #1 High Pressure, 4=Comp #2 High Pressure, 5=Comp #1 Low Pressure, 6=Comp #2 Low Pressure, 7=Comp #1 Suctn Temp Snsr Fail, 8=Comp #2 Suctn Temp Snsr Fail, 9=Comp #1 Low Suction Temp, 10=Comp #2 Low Suction Temp, 11=Room Temp Sensor Fail, 12=Entering Water Temp Sensor Fail, 13=Condensate Overflow, 14=Serial EEPROM Corrupted, 15=Invalid Configuration, 16=Low Entering Water Temp | |
| MV | 3 | Fan Speed | Fan Speed Output | Read | 1=Off, 2=Low, 3=Medium, 4=High, 5=On | |
| MVmin | 4 | McQWSHPStatus | McQuay WSHP Status | Read | 1=Off Alarm, 2=Off*, 3=Start, 4=Fan Only* (fan is allowed to operate), 5=Prepare to Heat, 6=Heating, 7=Prepare to Cool, 8=Cooling, 9=Prepare to Dehumidify, 10=Dehumidification | |
| MV | 5 | PreviousAlarm | Previous Alarm | Read | 1=No Alarms, 2=Low Voltage Brownout, 3=Comp #1 High Pressure, 4=Comp #2 High Pressure, 5=Comp #1 Low Pressure, 6=Comp #2 Low Pressure, 7=Comp #1 Suctn Temp Snsr Fail, 8=Comp #2 Suctn Temp Snsr Fail, 9=Comp #1 Low Suction Temp, 10=Comp #2 Low Suction Temp, 11=Room Temp Sensor Fail, 12=Entering Water Temp Sensor Fail, 13=Condensate Overflow, 14=Serial EEPROM Corrupted, 15=Invalid Configuration, 16=Low Entering Water Temp | |
| MV | 6 | EffectOccup | Effective Occupancy Output | Read | 1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby, 5=Null | |
| MVmin | 7 | OccManCmd | Occupancy Override Input | Command | 1=Occupied, 2=Unoccupied, 3=Bypass, 4=Standby, 5=Null | |
| MV | 8 | OccSchedule | Occupancy Scheduler Input | Command | 1=Occupied, 2=Unoccupied, 3=Standby, 4=Null | |
| MV | 9 | OccSensor | Occupancy Sensor Input | Command | 1=Occupied, 2=Unoccupied, 3=Null | |
| MVmin | 10 | ApplicMode | Application Mode Input | Command | 1=Auto, 2=Heat, 3=Cool, 4=Off, 5=Fan Only, 6=Dehumid, 7=Null | |
| MV | 11 | AuxHeatEnable | Auxiliary Heat Enable Input | Command | 1=Disabled, 2=Enabled, 3=Null | |
| MV | 12 | EnergyHoldOff | Energy Hold Off Input | Command | 1=Normal, 2=Energy Hold Off, 3=Null | |
| MV | 13 | PumpRequest | Pump Request Output | Read | 1=No Request for Flow, 2=Request for Flow, 3=Null | |
| MV | 14 | cpLocSpEnable | Room Sensor Setpoint Adjust Enable/Disable | Write | 1=Disabled, 2=Enabled | |
| MV | 15 | Units | Units (English/Metric) | Write | 1=English (E), 2=Metric (M) |
No points match these filters.
Integration notes
- BACnet MS/TP only; there is no BACnet IP option on this controller.
- Configuration (cp...) objects are stored in non-volatile memory with a limited write life; avoid frequent writes.
- AV 5 is printed truncated as 'cpStandby_' in this table; the SmartSource table prints the full name cpStandby_Heat_Setpt.
- AV 411 is named MacAddress or MacAddressSwitch depending on the physical address switch setting.
- BinaryIn (BI 1) and BinaryOut (BV 2) are bit-packed status values explained in the guide.
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 MicroTech III WSHP Controller - Enfinity Single Stage 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 MicroTech III WSHP Controller - Enfinity Single Stage
How many BACnet points does the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage have?
This list has 66 BACnet objects: 8 analog inputs, 37 analog values, 1 binary input, 2 binary values, 3 multi-state inputs, 15 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage BACnet points are writable?
39 of the 66 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 MicroTech III WSHP Controller - Enfinity Single Stage BACnet documentation?
The source is MicroTech III Water Source Heat Pump Unit Controller Protocol Information (ED 15103-9), revision 2021-08, published free by Daikin Applied at https://tahoeweb.daikinapplied.com/api/general/DownloadDocumentByName/media/MicroTech%20III%20WSHP%20Unit%20Controller%20Protocol%20Information%20Daikin%20ED%2015103.pdf.
What are the minimum BACnet points to integrate the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage?
Start with MV 7 OccManCmd (Occupancy override from the BMS); MV 10 ApplicMode (Application mode (Auto/Heat/Cool/Off/Fan Only/Dehumid)); AV 19 Setpoint (Network reference setpoint); BV 1 ClearAlarm (Clear the current alarm); MV 4 McQWSHPStatus (Unit operating status); AV 22 EffectSpaceTemp (Space temperature used for control); AI 2 LWT (Leaving water temperature); MV 2 CurrentAlarm (Highest-priority active alarm).
How do I enable BMS control of the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage?
No local/remote switch is described. Network override objects take effect when written: Application Mode Input (MV 10) selects Auto/Heat/Cool/Off/Fan Only/Dehumid, Occupancy Override Input (MV 7) and Occupancy Scheduler Input (MV 8) set occupancy, and Compressor Enable Input (MV 1) permits compressor operation. Overrides revert to their default (Null) values after a controller reboot.
Does the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage need a BACnet heartbeat or have a communication timeout?
Receive Heartbeat (AV 20, cpRcvHrtBt, 0-6553.4 s, default 0 = disabled) is the maximum time a supported override may go without being rewritten before it reverts to its default. Each supported point has its own timer: AV 18, AV 35, MV 1, MV 8, MV 9, MV 10, MV 11 and MV 12. Send Heartbeat is not supported by the BACnet module; use COV instead.
Can the BMS supply sensor values to the Daikin Applied MicroTech III WSHP Controller - Enfinity Single Stage?
Write the space temperature to Space Temperature Input (AV 18); Effective Space Temperature (AV 22) uses the local AI 1 sensor unless AV 18 holds a valid value. Temperature Setpoint Input (AV 19) sets the reference setpoint for Occupied/Standby, but local setpoint adjust must first be disabled with MV 14. Temperature Setpoint Offset Input (AV 35) shifts the occupied/standby setpoints. Occupancy Sensor Input (MV 9) accepts a network occupancy sensor.
How do I check these points on the real MicroTech III WSHP Controller - Enfinity Single Stage?
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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Source: MicroTech III Water Source Heat Pump Unit Controller Protocol Information · ED 15103-9 · rev. 2021-08. Object names, instances and units are reproduced as published; descriptions are our own.