Daikin EWWQ-KC User manual

Water to water heat pump units with scroll compressors
EWWQ~KC/ EWLQ~KC
Original Instruction
REV
00
Date
01/2022
Supersedes
/
Operating Manual
D-EOMHP01501-22_00EN

D-EOMHP01501-22_00EN 2/28
Contents
1. SAFETY CONSIDERATIONS.................................................................................................................................................. 3
1.1. General................................................................................................................................................................................................ 3
1.2. Before switching the unit................................................................................................................................................................... 3
1.3. Avoid electrocution ............................................................................................................................................................................ 3
2. GENERAL DESCRIPTION....................................................................................................................................................... 4
2.1. Basic Information ............................................................................................................................................................................... 4
2.2. Controller Operating Limits ............................................................................................................................................................... 4
2.3. Controller Architecture....................................................................................................................................................................... 4
2.4. Controller maintenance...................................................................................................................................................................... 4
2.5. Embedded Web Interface (Optional).................................................................................................................................................. 5
2.6. Application Save and Reset............................................................................................................................................................... 5
3. WORKING WITH THIS UNIT ................................................................................................................................................... 6
3.1. Unit Interface....................................................................................................................................................................................... 6
3.1.1. Icons Description ......................................................................................................................................................................... 7
3.2. Insert Password.................................................................................................................................................................................. 7
3.3. Chiller On/Off ...................................................................................................................................................................................... 7
3.3.1. Keypad On/Off .............................................................................................................................................................................. 8
3.3.2. Scheduler...................................................................................................................................................................................... 8
3.3.3. Network On/Off............................................................................................................................................................................. 9
3.3.4. Unit On/Off Switch........................................................................................................................................................................ 9
3.4. Water Setpoints ................................................................................................................................................................................ 10
3.5. The path in the Web HMI interface for Water Setpoint configuration is “Main Menu →Unit Mode →Mode” ............Errore. Il
segnalibro non è definito.
3.5.1. Heat/Cool Mode .......................................................................................................................................................................... 11
3.6. Pumps and Variable Flow................................................................................................................................................................. 11
3.6.1. Fixed Speed................................................................................................................................................................................ 11
3.6.2. DeltaT.......................................................................................................................................................................................... 12
3.7. Network Control................................................................................................................................................................................ 13
3.8. Thermostatic Control........................................................................................................................................................................ 13
3.9. External Alarm .................................................................................................................................................................................. 14
3.9.1. Thermostatic Source Control .................................................................................................................................................... 14
3.9.1.1. Entering Water Temperature Control............................................................................................................................... 14
3.9.1.2. Leaving Water Temperature Control................................................................................................................................ 15
3.10. Unit Capacity..................................................................................................................................................................................... 16
3.11. Power Conservation......................................................................................................................................................................... 16
3.11.1. Setpoint Reset ............................................................................................................................................................................ 16
3.11.1.1. Setpoint Reset by 0-10V signal ........................................................................................................................................ 17
3.11.1.2. Setpoint Reset by DT........................................................................................................................................................ 17
3.12. Controller IP Setup ........................................................................................................................................................................... 18
3.13. Daikin On Site ................................................................................................................................................................................... 18
3.14. Date/Time .......................................................................................................................................................................................... 19
3.15. Master/Slave...................................................................................................................................................................................... 19
3.16. Customer Unit Configuration........................................................................................................................................................... 20
3.17. Water Reversing Valve..................................................................................................................................................................... 20
3.18. Connectivity Kit & BMS Connection................................................................................................................................................ 21
3.19. About Chiller..................................................................................................................................................................................... 22
3.20. HMI Screen Saver ............................................................................................................................................................................. 22
3.21. Generic Controller Operation........................................................................................................................................................... 22
3.22. HMI Parameters Navigation Table.................................................................................................................................................... 22
4. ALARMS AND TROUBLE SHOOTING..................................................................................................................................26
4.1. Alarms List: Overview...................................................................................................................................................................... 26
4.2. Troubleshooting ............................................................................................................................................................................... 27
List of tables
Graph 1 –Compressors start-up sequence - Cool mode....................................................................................................... 13
Graph 2 –External signal 0-10V vs Active Setpoint - Cooling mode(left)/ Heating mode(right)......................................... 17
Graph 3 –Evap ∆T vs Active Setpoint - Cooling mode(left)/ Heating mode(right)............................................................... 17

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1. SAFETY CONSIDERATIONS
1.1. General
Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the installation are not considered:
operating pressures, presence of electrical components and voltages and the installation site (elevated plinths and built-up up
structures). Only properly qualified installation engineers and highly qualified installers and technicians, fully trained for the
product, are authorized to install and start-up the equipment safely.
During all servicing operations, all instructions and recommendations, which appear in the installation and service instructions for
the product, as well as on tags and labels fixed to the equipment and components and accompanying parts supplied separately,
must be read, understood and followed.
Apply all standard safety codes and practices.
Wear safety glasses and gloves.
WARNING The emergency stop causes all motors to stop, but does not switch off power to the unit.
Do not service or operate on the unit without having switched off the main switch.
1.2. Before switching the unit
Before switching on the unit read the following recommendations:
•When all the operations and all the settings have been carried out, close all the switchbox panels
•The switchbox panels can only be opened by trained personnel
•When the UC requires to be accessed frequently the installation of a remote interface is strongly recommended
•LCD display of the unit controller may be damaged by extremely low temperatures (see chapter 2.3). For this reason, it
is strongly recommended to never power off the unit during winter, especially in cold climates.
1.3. Avoid electrocution
Only personnel qualified in accordance with IEC (International Electrotechnical Commission) recommendations may be permitted
access to electrical components. It is particularly recommended that all sources of electricity to the unit be shut off before any
work is begun. Shut off main power supply at the main circuit breaker or isolator.
IMPORTANT: This equipment uses and emits electromagnetic signals. Tests have shown that the equipment conforms
to all applicable codes with respect to electromagnetic compatibility.
WARNING Direct intervention on the power supply can cause electrocution, burns or even death. This
action must be performed only by trained persons.
WARNING RISK OF ELECTROCUTION: Even when the main circuit breaker or isolator is switched off,
certain circuits may still be energized, since they may be connected to a separate power source.
WARNING RISK OF BURNS: Electrical currents cause components to get hot either temporarily or
permanently. Handle power cable, electrical cables and conduits, terminal box covers and motor frames
with great care.
WARNING In accordance with the operating conditions the fans can be cleaned periodically. A fan can start
at any time, even if the unit has been shut down.

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2. GENERAL DESCRIPTION
2.1. Basic Information
POL468.85/MCQ/MCQ is a system for controlling single or dual-circuit air/water cooled chillers. POL468.85/MCQ/MCQ controls
compressor start-up necessary to maintain the desired heat exchanger leaving water temperature. In each unitmode, by installing
proper bypass options, it can control the operation of the condensers to maintain the proper condensation process in each circuit.
Safety devices are constantly monitored by POL468.85/MCQ/MCQ to ensure their safe operation.
Abbreviations used
In this manual, the refrigeration circuits are called circuit #1 and circuit #2. The compressor in circuit #1 is labelled Cmp1. The
other in circuit #2 is labelled Cmp2. The following abbreviations are used:
W/C
Water Cooled
ESRT
Evaporating Saturated Refrigerant Temperature
CP
Condensing Pressure
EXV
Electronic Expansion Valve
CSRT
Condensing Saturated Refrigerant Temperature
HMI
Human Machine Interface
DSH
Discharge Superheat
MOP
Maximum operating pressure
DT
Discharge Temperature
SSH
Suction Super-Heat
EEWT
Evaporator Entering Water Temperature
ST
Suction Temperature
ELWT
Evaporator Leaving Water Temperature
UC
Unit controller (POL468.85/MCQ/MCQ)
EP
Evaporating Pressure
R/W
Readable/Writable
2.2. Controller Operating Limits
Operation (IEC 721-3-3):
•Temperature -40...+70 °C
•Humidity < 95 % r.h (no condensation)
•Air pressure min. 700 hPa, corresponding to max. 3,000 m above sea level
Transport (IEC 721-3-2):
•Temperature -40...+70 °C
•Humidity < 95 % r.h (no condensation)
•Air pressure min. 260 hPa, corresponding to max. 10,000 m above sea level.
2.3. Controller Architecture
The overall controller architecture is the following:
•One POL468.85/MCQ main controller
•Peripheral Bus is used to connect I/O extensions to the main controller.
2.4. Controller maintenance
The controller requires to maintain the installed battery. Every two years it’s required to replace the battery. Battery model is:
BR2032 and it is produced by many different vendors.
WARNING To replace the battery, it is important to remove the power supply to all unit.
Refer to picture below for battery installation.

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2.5. Embedded Web Interface (Optional)
The POL468.85/MCQ/MCQ controller has an embedded web interface, available with accessory EKRSCBMS (Connectivity for
external BMS communication), that can be used to monitor the unit when connected to a TCP-IP network. It is possible to
configure the IP addressing of the POL468.85/MCQ as a fixed IP of DHCP depending on the network configuration.
With a common web browser, a PC can connect with the unit controller entering the IP address.
When connected, it will be required to enter a username and a password. Enter the following credential to get access to the web
interface:
User Name: ADMIN
Password: SBTAdmin!
2.6. Application Save and Reset
Every variations of the HMI parameters will be lost after a power loss and it’s necessary to execute a saving command to make
them permanent. This action can be done via the Application Save command.
The controller automatically makes an Application Save after a change of value of one of following parameters:
Parameters
Name
1.00
Unit Enable
1.01
Circuit 1 Enable
1.02
Circuit 2 Enable
2.00
Available Modes
4.00
Control Source(da collegare in sapro
se necessario)
5.00
Cool Setpoint 1
5.01
Cool Setpoint 2
5.02
Heat Setpoint 1
5.03
Heat Setpoint 2
8.07
Evaporator Delta T setpoint
8.20
Condenser Delta T Setpoint
9.09
Thermostatic Source Control
13.00
DHCP Enable
14.03
Number of circuit
14.01
Evaporator Pump control mode
15.03
EWT Sensor Enable
15.10
Water reversing valve Normal
behaviour
15.11
Water reversing valve Delay To Cool
15.12
Water reversing valve Delay To Heat
15.13
Low Pressure Unload Restart Number
15.16
Low Pressure Alarm First Run Delay
18.00
Reset Type
19.15
Bas Protocol
WARNING Some parameters present in the interface require a restart of the UC to become effective after a
change of value. This operation can be done using the Apply Changes command.
These commands can be found in Page [23]:
Menu
Parameter
R/W
20
(PLC)
00 (Application Save)
W
01(Apply Changes)
W
The path in the Web HMI interface for Application Save is “Main Menu”.
The path in the Web HMI interface for Apply Changes is “Main Menu →View/Set Unit →Controller IP Setup →Settings”.

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3. WORKING WITH THIS UNIT
3.1. Unit Interface
The user interface installed in the unit is divided into 4 functional groups:
1. Numeric value Display (f.g.1)
2. Actual Parameter/Sub-Parameter group (f.g.2)
3. Icon indicators (f.g.3)
4. Menu/Navigation keys (f.g.4)
The interface has a multi-level structure divided as follows:
Main Menu
Parameters
Sub-Parameters
Page [1]
Parameter [1.00]
Sub-Parameter [1.0.0]
…
Sub-Parameter [1.0.XX]
…
…
Parameter [1.XX]
Sub-Parameter [1.XX.0]
…
Sub-Parameter
[1.XX.YY]
Page [2]
Parameter [2.00]
Sub-Parameter [2.0.0]
…
Sub-Parameter [2.0.XX]
…
…
Parameter [2.XX]
Sub-Parameter [2.XX.0]
…
Sub-Parameter
[2.XX.YY]
…
…
…
Page [N]
Parameter [N.00]
Sub-Parameter [N.00.0]
…
Sub-Parameter
[N.XX.YY]
..
…
Parameter [N.XX]
Sub-Parameter [N.00.0]
…
Sub-Parameter
[N..XX.YY]

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Parameters can be writable, only readable or give access to other sub-parameters (see table in 3.22 chapter).
The list of actions for browsing through the menu is:
1. Press [▲] [▼], in the navigation keys, to browse through the parameter groups, that is shown in (f.g.2) by its number,
and in (f.g.1) by its name.
2. Press [SET] to select a parameter group.
3. Press [▲] [▼] to browse through the parameters in the specific group or menu.
4. Press [SET] to start value setting phase.
a. During this phase, the value string (f.g.1) of the HMI will start to blink
5. Press [▲] [▼] to set/change the parameter value, that is shown in the numeric display (f.g.1).
6. Press [SET] to accept the value.
a. After exiting the setting phase, the value string of the HMI will stop to blink. If an unavailable value is selected
the value will continue to blink and value won’t be set.
In order to go back through the pages, press the On/Stand-by button .
3.1.1. Icons Description
Icons provide an indication about current unit status.
ICON
Description
LED ON
LED OFF
LED BLINKING
LED Functioning mode Chiller
Running in cooling mode
-
-
LED Functioning mode Heat Pump
-
Running in heat mode
-
LED Compressor ON (Circuit 1 Left,
Circuit 2 Right)
Compressor ON
Compressor OFF
Compressor performing
preopen or pump-down
procedure
LED Circulation Pump ON
Pump ON
Pump OFF
-
°C
LED Temperature
Temperature Value displayed
-
-
Bar
LED Pressure
Pressure Value displayed
-
-
%
LED Percentage
Percentage Value displayed
-
-
LED Alarm
-
No Alarm
Alarm Presence
LED Setting mode
Customer parameter
unlocked
-
-
LED Connection status on Daikin on
site
Connected
No Connection
Requesting Connection
LED on/stand-by
Unit Enabled
Unit Disabled
-
LED remote BMS control
BMS control ON
BMS control OFF
-
3.2. Insert Password
In order to unlock customer functionalities, the User has to insert the Password through the HMI menu [0]:
Menu
Parameter
Range
Description
R/W
00
00
(Insert
Password)
0-9999
To insert all the 4 digits of the password, press “Set” after the insertion of the
number to move on the next digit.
W
The password to access the customer’ setting pages is: 2526
3.3. Chiller On/Off
Unit controller provides several features to manage unit start/stop:
1. Keypad On/Off
2. Scheduler (Time programmed On/Off)
3. Network On/Off (optional with Accessory EKRSCBMS)
4. Unit On/Off Switch

D-EOMHP01501-22_00EN 8/29
3.3.1. Keypad On/Off
Keypad On/Off allows to enable or disable the unit from local controller. If needed, single refrigerant circuit can be also enabled
or disabled. By default, all refrigerant circuits are enabled.
Menu
Parameter
Range
Description
R/W
01
00
(Unit Enable)
0-2
0 = Unit disabled
W
1 = Unit enabled
W
2 = Unit enabling state based on Scheduler programming. Refer to chapter 3.3.2
W
01
(Circuit 1 Enable)
0-1
0 = Circuit 1 disabled
W
1 = Circuit 1 enabled
W
02
(Circuit 2 enable)
0-1
0 = Circuit 2 disabled
W
1 = Circuit 2 enabled
W
The path in the Web HMI interface is “Main Menu → Unit Enable”.
3.3.2. Scheduler
The activation / deactivation of the unit can be managed automatically through the Schedule function, activated when the Unit
Enable parameter is set to Schedule.
The operating modes during the different daily time bands are managed through the interface page [17] containing the following
registers to be set:
Menu
Page
Parameter
R/W
Psw
[17] = Scheduler
(Scheduler)
[17.00] = Monday
(Monday)
[17.0.0] Time 1
W
1
[17.0.1] Value 1
W
1
[17.0.2] Time 2
W
1
[17.0.3] Value 2
W
1
[17.0.4] Time 3
W
1
[17.0.5] Value 3
W
1
[17.0.6] Time 4
W
1
[17.0.7] Value 4
W
1
[17.01] = Tuesday
(Tuesday)
[17.1.0] Time 1
W
1
[17.1.1] Value 1
W
1
[17.1.2] Time 2
W
1
[17.1.3] Value 2
W
1
[17.1.4] Time 3
W
1
[17.1.5] Value 3
W
1
[17.1.6] Time 4
W
1
[17.1.7] Value 4
W
1
[17.02] = Wednesday
(Wednesday)
[17.2.0] Time 1
W
1
[17.2.1] Value 1
W
1
[17.2.2] Time 2
W
1
[17.2.3] Value 2
W
1
[17.2.4] Time 3
W
1
[17.2.5] Value 3
W
1
[17.2.6] Time 4
W
1
[17.2.7] Value 4
W
1
[17.03] = Thursday
(Thursday)
[17.3.0] Time 1
W
1
[17.3.1] Value 1
W
1
[17.3.2] Time 2
W
1
[17.3.3] Value 2
W
1
[17.3.4] Time 3
W
1
[17.3.5] Value 3
W
1
[17.3.6] Time 4
W
1
[17.3.7] Value 4
W
1
[17.04] = Friday
(Friday)
[17.4.0] Time 1
W
1
[17.4.1] Value 1
W
1
[17.4.2] Time 2
W
1
[17.4.3] Value 2
W
1
[17.4.4] Time 3
W
1
[17.4.5] Value 3
W
1
[17.4.6] Time 4
W
1
[17.4.7] Value 4
W
1
[17.05] = Saturday
(Saturday)
[17.5.0] Time 1
W
1
[17.5.1] Value 1
W
1
[17.5.2] Time 2
W
1
[17.5.3] Value 2
W
1
[17.5.4] Time 3
W
1
[17.5.5] Value 3
W
1
[17.5.6] Time 4
W
1
[17.5.7] Value 4
W
1
[17.06] = Sunday
(Sunday)
[17.6.0] Time 1
W
1
[17.6.1] Value 1
W
1
[17.6.2] Time 2
W
1
[17.6.3] Value 2
W
1

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[17.6.4] Time 3
W
1
[17.6.5] Value 3
W
1
[17.6.6] Time 4
W
1
[17.6.7] Value 4
W
1
The path in the Web HMI interface is “Main Menu →View/Set Unit →Scheduler”.
The user can indicate four time slots for each day of the week and set one of the following modes for each of them:
Parameter
Range
Description
Value
[17.x.x]
0 = Off
Unit disabled
1 = On 1
Unit enabled –Water primary setpoint selected
2 = On 2
Unit enabled –Water secondary setpoint selected
The Time slots can be set from in “Hour:Minute”:
Parameter
Range
Description
Time
[17.x.x]
“00:00-24:60”
Time of the day can vary from 00:00 to 23:59.
If Hour = 24 the HMI will display “An:Minute” as string and the Value# related to Time# is set for all hours
of the associated day.
If Minute = 60 the HMI will display “Hour:An” as string and the Value# related to Time# is set for all
minutes of the selected hours of the day.
3.3.3. Network On/Off
Chiller On/Off can be managed also with BACnet or Modbus RTU communication protocol.
To control the unit over the network, follow below instructions:
1. Unit On/Off switch = closed
2. Unit Enable = Enable (refer to 3.3.1)
3. Control Source = 1 (refer to 3.7)
The HMI menu is:
Menu
Parameter
Range
R/W
04
00
(Control Source)
Off = Local
W
On = Network
W
Modbus RTU is available as default protocol on RS485 port. The HMI page [22] is used to change between Modbus and BACnet
protocol and set parameters for both MSTP and TCP-IP communication, as shown in chapter 3.22.
The path in the Web HMI interface for Network Control Source is “Main Menu View/Set →Unit →Network Control”.
3.3.4. Unit On/Off Switch
For unit start up is mandatory to close the electrical contact between terminals: XD-703 →UC-D1 (UNIT ON/OFF SWITCH).
This short circuit can be realized through:
•External electrical switch
•Cable

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3.4. Water Setpoints
Purpose of this unit is to cool or to heat (in case of heat mode) the water, to the setpoint value defined by the user and displayed
in the main page:
The unit can work with a primary or a secondary setpoint, that can be managed as indicated below:
1. Keypad selection + Double Setpoint digital contact
2. Keypad selection + Scheduler Configuration
3. Network
4. Setpoint Reset function
As first step the primary and secondary setpoints need to be defined.
Menu
Parameter
Range
Description
R/W
05
00 (Cool LWT 1)
-10°C … 20°C
Primary cooling setpoint.
W
01 (Cool LWT 2)
-10°C … 20°C
Secondary cooling setpoint.
W
02 (Heat LWT 1)
20°C … 55°C
Primary heating setpoint.
W
03 (Heat LWT 1)
20°C … 55°C
Secondary heating setpoint.
W
The change between primary and secondary setpoint can be performed using the Double setpoint contact, available with
accessory EKRSCBMS, or through the Scheduler function.
Double setpoint contact works as below:
▪Contact opened, the primary setpoint is selected
▪Contact closed, the secondary setpoint is selected
In order to change between primary and secondary setpoint with the Scheduler function, refer to the section 3.3.2.
WARNING When the scheduler function is enabled, the Double setpoint contact is ignored.
To modify the active setpoint through network connection, refer to “Network control”section 3.7.
The active setpoint can be further modified using the “Setpoint Reset”function as explained in section 3.11.1.

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3.5. Unit mode
The Unit Mode is used to define if the chiller is configured to produce chilled or heated water. This parameter is related to the unit
type and is set in factory or during commissioning operation.
Current mode is reported in the main page.
The path in the Web HMI interface for Unit mode configuration is “Main Menu →Unit Mode →Mode”.
Menu
Parameter
Range
Description
02
00
(Unit Mode)
0 = Cool
Set if chilled water temperature up to 4°C is required. No glycol is
generally needed in the water circuit unless ambient temperature may
reach low values. In case of water greater than 4°C, but water circuit with
glycol, set mode “Cool with glycol”.
1 = Cool with glycol
Set if chilled water temperature below 4°C is required. This operation
requires proper glycol/water mixture in the plate heat exchanger water
circuit.
2 = Cool / Heat
Set in case a dual cool/heat mode is required. This setting implies an
operation with double functioning which is activated through the physical
switch or BMS control. =”=!
•COOL: The unit will work in cooling mode with the Cool LWT as the
Active Setpoint.
•HEAT: The unit will work in heat pump mode with the Heat LWT as
the Active Setpoint.
3 = Cool / Heat with glycol
Same behavior of “Cool / Heat” mode but Chilled water temperature below
4°C is required or glycol is present in the water circuit.
3.5.1. Heat/Cool Mode
Heat/Cool operating mode can be set using a Digital Input.
All settings related to Cooling-Heating operation will produce a real mode change only if Unit Mode parameter (refer to menu 01) is
set to:
▪Heat/Cool
▪Heat/Cool w/Glycol
In all other cases no mode switch will be allowed
Menu
Parameter
Range
Description
02
00
(Unit Mode)
0 = Cool
Only cooling mode is permitted
1 = Cool with glycol
2 = Cool / Heat
Both heating and cooling mode is permitted
3 = Cool
/ Heat with glycol
Digital input reference
Digital input state
Description
Cool/Heat switch
Opened
Cooling mode is selected
Closed
Heating mode is selected
3.6. Pumps and Variable Flow
The UC can manage one water pump connected to the water plate heat exchanger. The pump control type is configured in page
[15] and can operate in two different ways:
1. Fixed Speed
2. DeltaT
Menu
Parameter
Descriptiion
R/W
Psw
15
(Customer Configuration)
00
(Evaporator Pump Ctrl Mode)
0 = On- Off
1 = Fixed Speed
3 = DeltaT
W
1
04
(Cond Pump Ctrl Mode)
0 = On- Off
1 = Fixed Speed
3 = DeltaT
W
1
The path in the Web HMI interface for Pump Ctrl Type is “Main Menu →Commission Unit →Configuration →Options →
Evap Pump Type”/ “Main Menu →Commission Unit →Configuration →Options →Cond Pump Type”.
3.6.1. Fixed Speed
First control mode, Fixed Speed, allows an automatic pump speed variation, between two different speeds.
Main Settings are:
1. Speed 1
2. Standby Speed

D-EOMHP01501-22_00EN 12/29
Unit controller switches the pump frequency on the basis of:
1. Actual unit capacity
2. Double Speed digital input state
If there are no active compressors (Unit Capacity = 0%) pump speed is set to Standby Speed, otherwise Speed 1is selected
depending on the Double Speed input state.
3.6.2. DeltaT
The third control mode is the DeltaT mode where the pump speed is modulated through a PID to ensure a constant difference
between Evaporator Entering Water Temperature and Evaporator Leaving Water Temperature.
This mode is regulated by following setting:
▪Evaporator DeltaT in Cool Mode
▪Condenser Delta T in Heat Mode
All settings related to pump management are available in the menu [8].
Menu
Parameter
Range
Description
R/W
Psw
08
00
(Recirculation time)
0-300
Minimum time required within flow switch has to be closed to allow unit
startup.
W
1
01
(Standby Speed)
0-100
Pump speed with Unit Capacity = 0
W
1
02
(Evap pump Speed)
0-100
Actual Evaporator feedback pump speed.
R
1
03
(Max Speed)
0-100
Maximum value for pump speed.
W
1
04
(Min Speed)
0-100
Minimum value for pump speed.
W
1
05
(Sp Speed1)
0-100
First target value for pump speed in Fixed Speed control conditions.
W
1
06
(Parameter-K)
1-10
This value scales the PI algorithm parameters to obtain a faster response.
W
1
07
(Evap Setpoint DeltaT)
0-10
Evaporator Water Temperature difference setpoint.
W
1
08
(Evap Delta T)
0-10
Evaporator Delta temperature Between EWT and LWT
R
1
09
(Evap Pump Run Hours 1)
0-99999
Evaporator Operation Hours
R
1
10
(Evap Pump Run Hours 2)
0-99999
Evaporator Operation Hours
R
1
11
(Evap Pump Mode)
Auto/Manual
Pump mode. This parameter allows to switch the control of the pump to a
fixed speed.
W
1
12
(Evap Manual Speed)
0-100
Manual Pump Speed. Pump speed when the manual mode is selected.
W
1
13
(Evap Thermo Off
Stanby Speed)
0-100
Pump Speed in Thermostat Off Unit condition
W
1
14
(Cond Stanby Speed)
0-100
Speed when there are no compressors running
W
1
15
(Cond Pump Speed)
0-100
Actual Condenser feedback pump speed.
R
1
16
(Cond Max Speed)
0-100
Maximum value for pump speed.
W
1
17
(Cond Min Speed)
0-100
Minimum value for pump speed.
W
1
18
(Cond Speed 1)
0-100
Speed when the input Speed Switch is open
W
1
19
(Cond Parameter-K)
0-10
This value scales the PI algorithm parameters to obtain a faster response.
W
1
20
(Cond Setpoint DT)
0-10
Condenser Water Temperature difference setpoint.
W
1
21
(Cond Delta T)
0-10
Condenser Delta temperature Between EWT and LWT
R
1
22
(Cond Pump Run Hours)
0-99999
Condenser Operation Hours
R
1
23
(Cond Pump Mode)
Auto/Manual
Pump mode. This parameter allows to switch the control of the pump to a
fixed speed.
W
1
24
(Cond Manual Speed)
0-100
Manual Pump Speed. Pump speed when the manual mode is selected.
W
1
25
(Cond Thermo Off
Stably Speed)
0-100
Pump Speed in Thermostat Off Unit condition
W
1
The path in the Web HMI interface for Pump Settings is “Main Menu à View/Set Unit à Pumps”.
Delta T control must have both water probes at the evaporator inlet in order to operate. The path in the Web HMI interface
for EWT Sensor enabling is “Main Menu à Commission Unit à Configuration →Options”.

D-EOMHP01501-22_00EN 13/29
3.7. Network Control
To allow unit’s control from BMS system the Control Source parameter [4.00] needs to be set in Network. All settings related to
BSM control communication can be visualized in Page [4]:
Menu
Parameter
Range
Description
R/W
04
00
(Control Source)
0-1
0 = Network control disabled
On/Off command from network
W
1 = Network control enabled
01
(Enable)
0-1
0 = Unit is Enable
On/Off command from network visualization
R
1 = Unit is Disabled
02
(Cool LWT)
0..30°C
-
Cooling water temperature setpoint from network
R
03
(Heat LWT)
30..60°C
-
Heating water temperature setpoint from network
R
04
(Mode)
CH/HP
-
Operating mode from network
R
Refer to communication protocol documentation for specific registers addresses and the related read/write access level.
The path in the Web HMI interface is “Main Menu à View/Set Unit à Network Control”.
3.8. Thermostatic Control
Thermostatic control settings allow to set up the response to temperaturevariations. Default settings are valid for most application,
however plant specific conditions may require adjustments to have a smooth control or a quicker response of the unit.
The unit controller will start the first compressor if the controlled temperature is higher (Cool Mode) or lower (Heat Mode) than the
active setpoint of at least a Start Up DT value, whereas second compressor when available is started if the controlled temperature
is higher (Cool Mode) or lower (Heat Mode) than the active setpoint (AS) of at least a Stage Up DT (SU) value. Compressors stop
if performed following same procedure looking to the parameters Stage Down DT and Shut Down DT.
Cool Mode
Heat Mode
First compressor start
Controlled Temperature > Setpoint + Start Up DT
Controlled Temperature < Setpoint - Start Up DT
Other compressors start
Controlled Temperature > Setpoint + Stage Up DT
Controlled Temperature < Setpoint - Stage Up DT
Last compressor stop
Controlled Temperature < Setpoint - Shut Dn DT
Controlled Temperature > Setpoint + Shut Dn DT
Other compressors stop
Controlled Temperature < Setpoint - Stage Dn DT
Controlled Temperature > Setpoint + Stage Dn DT
A qualitative example of compressors start-up sequence in cool mode operation is shown in the graph below.
Graph 1 –Compressors start-up sequence - Cool mode
Thermostatic control settings are accessible from menu [9]:
Menu
Parameter
Range
Description
R/W
Psw
09
00
(Start Up DT)
0-10
Delta temperature respect the active setpoint to start the unit
(startup of first compressor)
W
1
01
(Shut Down DT)
0-MIN(5, 60.5-LwtSp)
Delta temperature respect the active setpoint to stop the unit
(shutdown of latest compressor)
W
1

D-EOMHP01501-22_00EN 14/29
02
(Stage Up DT)
0-5
Delta temperature respect the active setpoint to start second
compressor
W
1
03
(Stage Down DT)
0-MIN(5, 60-LwtSp)
Delta temperature respect the active setpoint second
compressor
W
1
04
(Stage Up Delay)
1÷60 [min]
Minimum time between the compressor startup
W
1
05
(Stage Down Delay)
0÷30 [min]
Minimum time between the compressor shutdown
W
1
06
(Evaporator Freeze)
if Unit mode = 1 or 3
-18 ÷ 6 [°C]
if Unit mode = 0 or 2
+2 ÷ 6 [°C]
Defines the minimum water temperature before the unit alarm
for evaporator freezing in triggered
W
2
07
(Condenser Freeze)
if Unit mode = 1 or 3
-18 ÷ 6 [°C]
if Unit mode = 0 or 2
+2 ÷ 6 [°C]
Defines the minimum water temperature before the unit alarm
for condenser freezing in triggered
08
(Low Pressure Unload)
if Unit mode = 1 or 3
150÷800 [kPa]
if Unit mode = 0 or 2
600÷800 [kPa]
Minimum pressure before compressor starts unload action in
order to increase evaporating pressure
The path in the Web HMI interface is “Main Menu → View/Set Unit → Thermostatic Control”.
3.9. External Alarm
The External Alarm is a digital contact that can be used to communicate to the UC an abnormal condition, coming from an external
device connected to the unit. This contact is located in the customer terminal box and depending on the configuration can causes
a simple event in the alarm log or also the unit stop. The alarm logic associated to the contact is the following:
Contact state
Alarm State
Note
Opened
Alarm
The alarm is generated if the contact remains opened for at least 5 seconds
Closed
No Alarm
The alarm is reset just the contact is closed
The configuration is performed from Page [15] as shown below:
Menu
Parameter
Range
Description
15
09
(Ext Alarm)
0 = No
External Alarm disabled
1 = Event
Event configuration generates an alarm in the controller but takes
the unit running
2 = Rapid Stop
Rapid Stop configuration generates an alarm in the controller and
performs a rapid stop of the unit
The web HMI path for the External Alarm configuration is: Commissioning →Configuration →Options
3.9.1. Thermostatic Source Control
The unit allows water control based on entering water temperature or leaving water temperature.
Thermostatic Control Parameters (Page 9) must be set according to customer requirements in order to fit as much as possible
the Water Plant conditions.
Thermostatic Control can be set into:
•EWT Control (Selectable only if EWT Sensor are enabled (15.03→1)
•LWT Control (Default)
3.9.1.1. Entering Water Temperature Control
In EWT Control, compressor starts/stops depend on Entering Water Temperature value, with respect to the thermostatic control
parameters.
Parameter
Description/Value
Control Temperature
Entering Water Temperature
SP
Based on Entering Water Temperature
Startup DT
2.7 dK (default value as described in previous chapter)
Shutdown DT
1.7 dK (default value as described in previous chapter)
Nominal DT
Depends on Unit Mode, set it in 15.14, 15.15 parameters (Nominal Evap DT, Nominal Cond DT)

D-EOMHP01501-22_00EN 15/29
3.9.1.2. Leaving Water Temperature Control
In LWT Control, compressor starts/stops depend on Leaving Water Temperature value with respect to the thermostatic control
parameters.
Depending on setting of StartupDT, thermoregulation control could lead to:
1. More accurate Thermostatic control →Frequent compressor starts/stops. (Default Configuration)
Note: UC always ensures amount of compressor start and stop does not exceed safety limit
2. Reduced amount of compressor Start/Stop →Less accurate Thermostatic Control.
To reduce amount of compressor start/stop, customer can modify the StartupDT parameter according to following
indication:
𝑆𝑡𝑎𝑟𝑡𝑈𝑝𝐷𝑇 > 𝑁𝑜𝑚𝑖𝑛𝑎𝑙 𝐷𝑇∗
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑈𝑛𝑖𝑡 𝐶𝑜𝑚𝑝𝑟𝑒𝑠𝑠𝑜𝑟𝑠
Parameter
Description/Value
Control Temperature
Leaving Water Temperature
SP
Based on Leaving Water Temperature
Startup DT
2.7 dK (default value as described in previous chapter)
Shutdown DT
1.7 dK (default value as described in previous chapter)
Nominal DT
Depends on Unit Mode, set it in 15.14, 15.15 parameters (Nominal Evap DT, Nominal Cond DT)

D-EOMHP01501-22_00EN 16/29
*Nominal DT is the difference between entering and leaving water temperature when the unit is operating at full capacity
with nominal plant water flow rate.
Parameter
Description/Value
Control Temperature
Leaving Water Temperature
SP
Based on Leaving Water Temperature
Startup DT
7.7 dK (example with 5 °C of nominal flow rate and unit with 1 compressor)
Shutdown DT
1.7 dK (default value as described in previous chapter)
Nominal DT
Depends on Unit Mode, set it in 15.14, 15.15 parameters (Nominal Evap DT, Nominal Cond DT)
3.10. Unit Capacity
Information about the unit's current and individual circuit capacities can be accessed from menu Page [3].
Menu
Parameter
Range
Description
R/W
03
00
(Circuit 1 Capacity)
0-100%
Circuit 1 capacity in percentage
R
01
(Circuit 2 Capacity)
0-100%
Circuit 2 capacity in percentage
R
In the HMI Web Interface, some of this information is available in the paths:
•Main Menu → View/Set Circuit → Circuit 1 (or Circuit 2) → Data
•Main Menu → View/Set Circuit → Circuit 1 (or Circuit 2) → Compressors
3.11. Power Conservation
In this chapters will be explained the functions used to reduce the unit power consumption.
3.11.1.Setpoint Reset
The “Setpoint Reset” function can override the chiller water temperature active setpoint when certain circumstances occur. The
aim of this function is to reduce the unit energy consumption whilst maintaining the same comfort level. To this purpose, three
different control strategies are available:
•Setpoint Reset by an external signal (0-10V)
•Setpoint Reset by Evaporator/Condenser ΔT (EEWT/CEWT)
The controlled Delta T is set in accord of actual unit mode: if unit is operating in Cool Mode, Evaporator Delta T will be considered
to activate Setpoint Reset, otherwise if it is operating in Heat Mode, Condenser Delta T will be considered to activate Setpoint
Reset.
In order to set the desired setpoint-reset strategy, go to the parameter group number [20] “Setpoint Reset”, according to the
following table:
Menu
Parameter
Range
Description
R/W
18
00
(Reset Type)
0-2
0 = No
W
1 = 0-10V
2 = DT

D-EOMHP01501-22_00EN 17/29
The path in the HMI Web interface to set the desired strategy is “Main Menu à Commission Unit à Configuration à
Options”and modify the Setpoint Reset parameter.
Parameter
Range
Description
LWT Reset
No
Setpoint reset not enabled
0-10V
Setpoint reset enabled by an external signal between 0 and 10V
DT
Setpoint reset enabled by Evaporator Water Temperature
Each strategy needs to be configured (although a default configuration is available) and its parameters can be set navigating to
“Main Menu à View/Set Unit à Power Conservation à Setpoint Reset”in the HMI Web interface.
WARNING Note that the parameters corresponding to a specific strategy will be available only once the
Setpoint Reset has been set to a specific value and the UC has been restarted.
3.11.1.1. Setpoint Reset by 0-10V signal
When the 0-10V is selected as Setpoint Reset option, the LWT active setpoint(AS) is calculated applying a correction based on
an external 0-10V signal: 0 V corresponds to 0°C correction, i.e. AS = LWT setpoint, whereas 10 V corresponds to a correction of
the Max Reset (MR) quantity, i.e. AS = LWT setpoint + MR(-MR) as shown in the following picture:
Graph 2 –External signal 0-10V vs Active Setpoint - Cooling mode(left)/ Heating mode(right)
Several parameters can be configured, and they are accessible from the Setpoint Reset menu, go to the parameter group
number [16] “Setpoint Reset”, according to the following table:
Menu
Parameter
Range
Description
R/W
20
01
(Max Reset)
0..10 [°C]
Max Reset setpoint. It represents the maximum temperature variation that the
selection of the Setpoint Reset logic can cause on the LWT.
W
3.11.1.2. Setpoint Reset by DT
When the DT is selected as Setpoint Reset option, the LWT active setpoint(AS) is calculated applying a correction based on the
temperature difference ΔT between the leaving water temperature(LWT) and the evaporator entering(returning) water temperature
(EWT). When the |ΔT| becomes smaller than the Start Reset ΔT setpoint(SRΔT), the LWT active setpoint is proportionally
increased (if Cooling mode set) or decreased (if Heating mode is set) of a maximum value equal to the Max Reset(MR) parameter.
Graph 3 –Evap ∆T vs Active Setpoint - Cooling mode(left)/ Heating mode(right)
Several parameters can be configured, and they are accessible from the Setpoint Reset menu, as shown below:

D-EOMHP01501-22_00EN 18/29
Menu
Parameter
Range
Description
R/W
18
01
(Max Reset)
0..10 [°C]
Max Reset setpoint. It represents the maximum temperature variation that the
selection of the Setpoint Reset logic can cause on the LWT.
W
02
(Start Reset DT)
0..10 [°C]
It represents the “threshold temperature” of the DT to activate the LWT setpoint
reset, i.e. the LWT setpoint is overwritten only if the DT reaches/overpasses the
SRΔT.
W
3.12. Controller IP Setup
The Controller IP Setup can be accessed from menu [13] where is possible to choose between the static or dynamic IP and
manually set IP and network Mask.
Menu
Parameter
Sub-Parameter
Description
R/W
13
00
(DHCP)
N/A
Off = DHCP Off
The DHCP option is disabled.
W
On = DHCP On
The DHCP option is enabled.
01
(IP)
N/A
“xxx.xxx.xxx.xxx”
Represent the current IP address. Once entered [13.01] parameter, the HMI will
automatically switch between all four IP-Address fields.
R
02
(Mask)
N/A
“xxx.xxx.xxx.xxx”
Represent the current Subnet Mask address. Once entered [13.02] parameter, the HMI
will automatically switch between all four Mask fields.
R
03
(Manual IP)
00 IP#1
Defines the first field of IP-Address
W
01 IP#2
Defines the second field of IP-Address
W
02 IP#3
Defines the third field of IP-Address
W
03 IP#4
Defines the fourth field of IP-Address
W
04
(Manual Mask)
00 Msk#1
Defines the first field of Mask
W
01 Msk#2
Defines the second field of Mask
W
02 Msk#3
Defines the third field of Mask
W
03 Msk#4
Defines the fourth field of Mask
W
In order to modify the MTIV IP Network configuration, do the following operations:
•access the Settings menu
•set the DHCP option to Off
•modify the IP, Mask, Gateway, PrimDNS and ScndDNS addresses, if needed, taking care of the current network
settings
•set Apply changes parameter to Yes to save the configuration and restart the MTIV controller.
The default internet configuration is:
Parameter
Default Value
IP
192.168.1.42
Mask
255.255.255.0
Gateway
192.168.1.1
PrimDNS
0.0.0.0
ScndDNS
0.0.0.0
Note that if the DHCP is set to On and the MTIV internet configurations shows the following parameter values then an internet
connection problem has occurred (probably due to a physical problem, like the Ethernet cable breaking).
Parameter
Value
IP
169.254.252.246
Mask
255.255.0.0
Gateway
0.0.0.0
PrimDNS
0.0.0.0
ScndDNS
0.0.0.0
3.13. Daikin On Site
Daikin on site connection can be enabled and monitored through menu [12]:
Menu
Parameter
Range
Description
R/W
Psw
12
00
(Enable)
Off = Connection Off
DoS connection is disabled
W
1
On = Connection On
DoS connection is enabled
01
(State)
0-6 = Not connected
7 = Connected
DoS actual connection state
R
1

D-EOMHP01501-22_00EN 19/29
In order to use the DoS utility, the customer has to communicate the Serial Number to Daikin company and subscribe to the DoS
service. Then, from this page, it is possible to:
•Start/Stop the DoS connectivity
•Check the connection status to DoS service
•Enable/Disable the remote update option
In the unlikely event of UC replacement, the DoS connectivity can be switched from the old PLC to the new one just communicating
the current Activation Key to Daikin company.
The Daikin on Site (DoS) page can be accessed navigating through the HMI Web Interface, with path Main Menu →View/Set
Unit →Daikin On Site.
3.14. Date/Time
The unit controller can take stored the actual date and time, that are used for Scheduler, and can be modified going in [10] and
[11] menu:
Menu
Parameter
Range
Description
R/W
10
00
(Day)
0…7
Defines actual day stored in UC
W
01
(Month)
0…12
Defines actual month stored in UC
W
02
(Year)
0..9999
Defines actual year stored in UC
W
11
00
(Hour)
0…24
Defines actual hour stored in UC
W
(Minute)
01
0…60
Defines actual minute stored in UC
W
The Date/Time information can be found at path “Main Menu →View/Set Unit →Date/Time”.
WARNING Remember to check periodically the controller battery in order to maintain updated date and
time even when there is no electrical power. Refer to controller maintenance section.
3.15. Master/Slave
Master/Slave protocol integration requires the selection of the address for each unit that we want to control. In each system we
can have only one master and a maximum of three slaves and it’s necessary to indicate the correct number of slaves. Address
and Number of Units can be selected through the parameters [15.04] and [15.07].
Notice that Master/Slave is not compatible with Pump Control Mode VPF and DT.
.
Menu
Parameter
Description
R/W
15
(Customer Configuration)
08
(Address)
0 = Standalone
1 = Master
2 = Slave1
3 = Slave2
4 = Slave3
W
10
(Number of Units)
0 = 2 Units
1 = 3 Units
2 = 4 Units
W
Address and Number of Units can be also set in the Web HMI path “Main Menu →Commission Unit →Configuration →
Options”.
Master Slave parameter can be set in Page [16] and are available only in Master Unit:
Menu
Parameter
Range
R/W
Psw
[16]
Master/Slave
(Available only for Master Unit)
[16.00] Start Up Limit
0-5
W
1
[16.01] Shut Dn Limit
0-5
W
1
[16.02] Stage Up Time
0-20 min
W
1
[16.03] Stage Dn Time
0-20 min
W
1
[16.04] Stage Up Load
30-100
W
1
[16.05] Stage Dn Load
30-100
W
1
[16.06] PrioSlave#1
1-4
W
1
[16.07] PrioSlave#2
1-4
W
1
[16.08] PrioSlave#3
1-4
W
1
[16.09] MasterPriority
1-4
W
1
[16.10] Master Enable
Off-On
W
1
[16.11] Standby Chiller
None/Auto/Master/Slave1/Slave2/Slave3
W
1
[16.12] Cycling Type
Run Hours/Sequence
W
1

D-EOMHP01501-22_00EN 20/29
[16.13] Interval Time
1-365
W
1
[16.14] Switch Time
1-24
W
1
[16.15] Temp Compensation
Off-On
W
1
[16.16] Tmp Cmp Time
0-600 minutes
W
1
[16.17] M/S Alarm Code
0..511
R
1
The path in the Web HMI interface for Master/Slave configuration is “Main Menu →Commission Unit →Configuration →
Master/Slave”. Please refer to specific documentation for more information about of this topic.
3.16. Customer Unit Configuration
Except for factory configurations, the client can custom the unit depending on his needs and options acquired. The allowed
modifications regard Unit Boost, Fan Boost, IO Ext Module, HMI Type, Pump Ctrl Type, SCM Address,
External Alarm, Costant Heating Capacity, SCM Number OF Units, Fan Silent Speed, Domestic Hot
Water.
All these customer configurations for the unit can be set in page [15].
Page
Parameter
Range
Description
R/W
Psw
15
00
(Evaporator Pump Ctrl Mode)
0-3
0 =On-Off Mode
1 = Fixed Speed
3 = DeltaT Mode
W
1
01
(Evap Control Measure)
0-2
0=No
1=EvapIn
2=EvapOut
W
1
02
(Evap Control Device)
0-2
0=No
1=Valve
2=VFP
W
1
03
(EWT Sensor Enable)
0-1
0=Sensor not connected
1=Sensor Connected
W
1
04
(Condenser Pump Ctrl Mode)
0-3
0 =On-Off Mode
1 = Fixed Speed
3 = DeltaT Mode
W
1
05
(Cond Control Measure)
0-2
0=No
1=CondIn
2=CondOut
W
1
06
(Cond Control Device)
0-2
0=No
1=Valve
2=VFP
W
1
07
(SCM Address)
0-4
0 = Standalone
1 = Master
2 = Slave1
3 = Slave2
4 = Slave3
W
1
08
(External Alarm)
0-3
0 = No
1 = Event
2 = Rapid Stop
W
1
09
(Number of Units)
0-2
0 = 2 Units
1 = 3 Units
2 = 4 Units
W
1
10 (Water Reversing Valve
Behaviour)
0-1
0=Normally Close
1=Normally Open
W
1
11
(Water Reversing Valve To Cool
Delay)
0-120
0-120s
W
1
12
(Water Reversing Valve To Heat
Delay)
0-120
0-120s
W
1
13
(Evap Nominal DT)
0-10
0-10
W
1
14
(Cond Nominal DT)
0-10
0-10
W
1
15
(HMI Sel)
0-1
0=Evco
1=Siemens
W
1
The path in the Web HMI interface for Customer Configuration settings is “Main Menu →Commission Unit →Options”
3.17. Water Reversing Valve
The Water Reversing Valve(WRV), depending on the model (NC/NO), goes to exchange externally to the chiller the hot water
with the cold water or the other way around. to control the correct functioning of the valve it has been given the possibility to give
a delay to the opening in the passage between cold and hot water and the other way around.
Page
Parameter
Range
Description
R/W
Psw
15
11
(Water Reversing Valve Behaviour)
0-1
0=Normally Close
1=Normally Open
W
1
12
(Water Reversing Valve To Cool
Delay)
0-120
0-120s
W
1