Daikin DWSC - Vintage C User manual

WATER COOLED CENTRIFUGAL CHILLERS
•DWSC Vintage C
•DWDC Vintage C
REV
01
Date
08/2022
Supersedes
D-EOMWC00803-6_00EN
Operating Manual
D-EOMWC00803-26_01EN

D-EOMWC00803-26_01EN - 2/39
TABLE OF CONTENTS
1SAFETY CONSIDERATIONS......................................................................................................................................... 4
1.1 General.................................................................................................................................................................... 4
1.2 Before switching the unit......................................................................................................................................... 4
1.3 Avoid electrocution.................................................................................................................................................. 4
2GENERAL DESCRIPTION ............................................................................................................................................. 5
2.1 Basic Information .................................................................................................................................................... 5
2.2 Abbreviations used..................................................................................................................................................5
2.3 Controller Operating Limits ..................................................................................................................................... 5
2.4 Controller Architecture ............................................................................................................................................5
2.5 Communication Modules......................................................................................................................................... 6
3USING THE CONTROLLER ........................................................................................................................................... 7
3.1 Navigating ...............................................................................................................................................................8
3.2 Passwords...............................................................................................................................................................8
3.3 Editing ..................................................................................................................................................................... 9
3.4 Basic Control System Diagnostic............................................................................................................................ 9
3.5 Controller maintenance......................................................................................................................................... 10
3.6 Optional Remote User Interface ...........................................................................................................................10
3.7 Embedded Web Interface ..................................................................................................................................... 11
4MENU STRUCTURE ..................................................................................................................................................... 12
4.1 Main Menu ............................................................................................................................................................ 12
4.2 View/Set Unit......................................................................................................................................................... 12
Thermostat Ctrl............................................................................................................................................. 13
Network Ctrl.................................................................................................................................................. 13
Pumps........................................................................................................................................................... 13
Condenser....................................................................................................................................................13
Evaporator....................................................................................................................................................14
Master/Slave................................................................................................................................................. 14
4.2.6.1 Data......................................................................................................................................................14
4.2.6.2 Options................................................................................................................................................. 15
4.2.6.3 Thermostat Ctrl ....................................................................................................................................15
4.2.6.4 Timers ..................................................................................................................................................15
4.2.6.5 Standby Chiller..................................................................................................................................... 16
Rapid Restart................................................................................................................................................ 16
Date/Time .....................................................................................................................................................16
Scheduler...................................................................................................................................................... 16
Power Conservation .....................................................................................................................................17
4.2.10.1 Demand Limit....................................................................................................................................... 17
4.2.10.2 Current Limit......................................................................................................................................... 17
4.2.10.3 SoftLoad............................................................................................................................................... 17
4.2.10.4 Setpoint Reset ..................................................................................................................................... 17
Controller IP setup........................................................................................................................................ 17
Daikin on Site ...............................................................................................................................................18
Software Options.......................................................................................................................................... 18
4.2.13.1 Changing the Password for buying new Software Options .................................................................18
4.2.13.2 Inserting the Password in a Spare Controller ......................................................................................19
4.2.13.3 Modbus MSTP Software Option ..........................................................................................................20
4.2.13.4 BACNET MSTP ................................................................................................................................... 21
4.2.13.5 BACNET IP ..........................................................................................................................................22
Menu Password............................................................................................................................................ 23
4.3 Active Setpoint...................................................................................................................................................... 23
4.4 Evaporator LWT.................................................................................................................................................... 23
4.5 Condenser LWT.................................................................................................................................................... 23

D-EOMWC00803-26_01EN - 3/39
4.6 Unit Capacity.........................................................................................................................................................23
4.7 Unit Mode.............................................................................................................................................................. 24
4.8 Unit Enable............................................................................................................................................................ 24
4.9 Timers ...................................................................................................................................................................24
4.10 Alarms...................................................................................................................................................................24
4.11 Commission Unit...................................................................................................................................................25
Alarm Limits..................................................................................................................................................25
Calibrate Sensors.........................................................................................................................................25
4.11.2.1 Unit Calibrate Sensors.........................................................................................................................25
4.11.2.2 Compressor Calibrate Sensors............................................................................................................ 26
Scheduled Maintenance............................................................................................................................... 26
4.12 About this Chiller................................................................................................................................................... 26
5WORKING WITH THIS UNIT ........................................................................................................................................ 27
5.1 Unit Setup ............................................................................................................................................................. 27
Control Source..............................................................................................................................................27
Available Mode Setting................................................................................................................................. 27
Temperature Settings................................................................................................................................... 28
5.1.3.1 LWT Setpoint Setting........................................................................................................................... 28
5.1.3.2 Thermostat Control Settings ................................................................................................................ 28
5.1.3.3 Pumps.................................................................................................................................................. 29
Power Conservation .....................................................................................................................................29
5.1.4.1 Demand Limit....................................................................................................................................... 29
5.1.4.2 Current Limit......................................................................................................................................... 30
5.1.4.3 Setpoint Reset ..................................................................................................................................... 30
5.1.4.4 Setpoint Reset by External 4-20 mA Signal......................................................................................... 30
5.1.4.5 Setpoint Reset by Evaporator Return Temperature ............................................................................30
5.1.4.6 Soft Load.............................................................................................................................................. 31
Scheduler...................................................................................................................................................... 31
5.2 Unit Start-up..........................................................................................................................................................31
Unit Status....................................................................................................................................................31
Prepare the unit to start................................................................................................................................32
5.2.2.1 Unit Switch Enable............................................................................................................................... 32
5.2.2.2 Keypad Enable.....................................................................................................................................32
5.2.2.1 BMS Enable.........................................................................................................................................32
5.3 Condensation Control (Optional) .......................................................................................................................... 32
6OPERATOR INTERFACE TOUCHSCREEN-OITS...................................................................................................... 34
6.1 Overview ............................................................................................................................................................... 34
6.2 Set user level ........................................................................................................................................................35
6.3 Homepage............................................................................................................................................................. 35
6.4 Global settings ...................................................................................................................................................... 36
6.5 Tab pages ............................................................................................................................................................. 37
6.6 Live trend............................................................................................................................................................... 37
7OPTIONS....................................................................................................................................................................... 38
7.1 Energy Meter including Current Limit (Optional)................................................................................................... 38
7.2 Rapid Restart (Optional) .......................................................................................................................................38
LIST OF FIGURES
Figure 1 –Controller Architecture ......................................................................................................................................... 6
Figure 2 –MicroTech POL688.80 Controller ........................................................................................................................7
Figure 3 –Using the controller ..............................................................................................................................................7
Figure 4 –Inbuilt HMI............................................................................................................................................................ 7
Figure 5 –Thermostat Control Settings .............................................................................................................................. 29
Figure 6 –Condenser Water Temperatur ........................................................................................................................... 33

D-EOMWC00803-26_01EN - 4/39
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.
Use the proper tools to move heavy objects. Move units carefully and set them down gently.
Do not operate on a faulty fan, pump or compressor before the main switch has been shut off.
Overtemperature protection is auto-reset, therefore the protected component may restart
automatically if temperature conditions allow it.
In some unit a push button is placed on a door of the unit electrical panel. The button is highlighted by a red color in yellow
background. A manual pressure of the emergency stop button stops all loads from rotating, thus preventing any accident
which may occur. An alarm is also generated by the Unit Controller. Releasing the emergency stop button enables the
unit, which may be restarted only after the alarm has been cleared on the controller.
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 2.4). 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.
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.
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.
ATTENTION: 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.

D-EOMWC00803-26_01EN - 5/39
2 GENERAL DESCRIPTION
2.1 Basic Information
MicroTech is a system for controlling single or dual-circuit air/water-cooled liquid chillers. MicroTech controls compressor
start-up necessary to maintain the desired heat exchanger leaving water temperature. In each unit mode it controls the
operation of the condensers to maintain the proper condensation process in each circuit.
Safety devices are constantly monitored by MicroTech to ensure their safe operation. MicroTech also gives access to a
Test routine covering all inputs and outputs. All MicroTech controls can work in accordance with three independent modes:
•Local mode: the machine is controlled by commands from the user interface.
•Remote mode: the machine is controlled by remote contacts (volt-free contacts).
•Network mode: the machine is controlled by commands from a BAS system. In this case, a data communication
cable is used to connect the unit to the BAS.
When the MicroTech system operates autonomously (Local or Remote mode) it retains all of its own control capabilities
but does not offer any of the features of the Network mode. In this case monitoring of the unit operational data is still
allowed.
2.2 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:
CEWT
Condenser Entering Water Temperature
CLWT
Condenser LeavingWater Temperature
CP
Condensing Pressure
CSRT
Condensing Saturated Refrigerant Temperature
DSH
Discharge Superheat
DT
Discharge Temperature
E/M
Energy Meter Module
EEWT
Evaporator Entering Water Temperature
ELWT
Evaporator LeavingWater Temperature
EP
Evaporating Pressure
ESRT
Evaporating Saturated Refrigerant Temperature
EXV
Electronic Expansion Valve
HMI
Human Machine Interface
MOP
Maximum operating pressure
SSH
Suction SuperHeat
ST
Suction Temperature
UC
Unit controller (MicroTech)
W/C
Water Cooled
2.3 Controller Operating Limits
Operation (IEC 721-3-3):
•Temperature -40...+70 °C
•Restriction LCD -20… +60 °C
•Restriction Process-Bus -25…+70 °C
•Humidity < 90 % 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.
2.4 Controller Architecture
The overall controller architecture is the following:
•One MicroTech main controller
•I/O extensions as needed depending on the configuration of the unit
•Communications interface(s) as selected
•Peripheral Bus is used to connect I/O extensions to the main controller.

D-EOMWC00803-26_01EN - 6/39
Figure 1 –Controller Architecture
Controller/Extension Module
Siemens Part Number
Address
Usage
EWWD/H-VZ/DWSC/DWDC
Main Controller
POL688.00/MCQ
n/a
Used on all configurations
Unit Extension Module
POL985.00/MCQ
2
Used on all configurations
Compressor Module 1
POL985.00/MCQ
3
Used on all configurations
Compressor Module 2
POL985.00/MCQ
4
Used on some configurations
HGBP Module 1
POL94U.00/MCQ
5
Optional
HGBP Module 2
POL94U.00/MCQ
6
Optional
All boards are supplied from a common 24 Vac source. Extension boards can be directly powered by the Unit Controller.
All boards can be also supplied by a 24Vdc source.
CAUTION: Maintain the correct polarity when connecting the power supply to the boards, otherwise
the peripheral bus communication will not operate and the boards may be damaged.
2.5 Communication Modules
Any of the following modules can be connected directly to the left side of the main controller to allow a BAS or other remote
interface to function. Up to three can be connected to the controller at a time. The controller should automatically detect
and configure itself for new modules after booting up. Removing modules from the unit will require manually changing the
configuration.
Module
Siemens Part Number
Usage
BacNet/IP
POL908.00/MCQ
Optional
Lon
POL906.00/MCQ
Optional
Modbus
POL902.00/MCQ
Optional
BACnet/MSTP
POL904.00/MCQ
Optional

D-EOMWC00803-26_01EN - 7/39
3 USING THE CONTROLLER
The control system consists of a unit controller (UC) equipped with a set of extension modules that implement additional
features. All boards communicate via aninternal peripheral bus with the UC. The UC continuously manages theinformation
received from the various pressure and temperature probes installed on the unit. The UC incorporates a program that
controls the unit.
Figure 2 –MicroTech POL688.80 Controller
Figure 3 –Using the controller
Figure 4 –Inbuilt HMI
This HMI is provided of three buttons and one wheel button.
Back Button
Menu Button
Alarm Button
Navigation Wheel
TCP/IP Port

D-EOMWC00803-26_01EN - 8/39
Alarm status (from any page it links with the page with alarm list, alarm log and alarm snapshot if available).
INFO
Back to Main Page.
ESC
Back to the previous level (it can be the Main Page).
Wheel
Button
Used to scroll between the different menu pages, settings and data available on the HMI for the active
password level. Rotating the wheel allows to navigate between lines on a screen (page) and to increase and
decrease changeable values when editing. Pushing the wheel acts as an Enter Button and will jump from a
link to the next set of parameters.
3.1 Navigating
When power is applied to the control circuit, the controller screen will be active and display the Home screen, which can
also be accessed by pressing the Menu Button. The navigating wheel is the only navigating device necessary, although
the MENU, ALARM, and BACK buttons can provide shortcuts as explained previously.
An example of the HMI screens is shown in the following picture.
M
a
i
n
M
e
n
u
1
/
11
E
n
t
e
r
P
a
s
s
w
o
r
d

U
n
i
t
S
t
a
t
u
s
=
O
f
f
:
U
n
i
t
S
W
A
c
t
i
v
e
S
e
t
p
t
=
7
.
0
°
C
A bell ringing in the top right corner will indicate an active alarm. If the bell doesn’t move it means that the alarm has be en
acknowledged but not cleared because the alarm condition hasn’t been removed. A LED will also indicate where the alarm
is located between the unit or circuits.
M
a
i
n
M
e
n
u
1
/

E
n
t
e
r
P
a
s
s
w
o
r
d

U
n
i
t
S
t
a
t
u
s
=
O
f
f
:
U
n
i
t
S
W
A
c
t
i
v
e
S
e
t
p
t
=
7
.
0
°
C
The active item is highlighted in contrast, in this example the item highlighted in Main Menu is a link to another page. By
pressing the push’n’roll, the HMI will jump to a different page. In this case the HMI will jump to the Enter Password page.
E
n
t
e
r
P
a
s
s
w
o
r
d
2
/
2
E
n
t
e
r
P
W
*
*
*
*
3.2 Passwords
The HMI structure is based on access levels that means that each password will disclose all the settings and parameters
allowed to that password level. Basic informations about the status can be accessed without the need to enter the
password. The user UC handles two level of passwords:
USER
5321
MAINTENANCE
2526
The following information will cover all data and settings accessible with the maintenance password. User password will
disclose a subset of the settings explained in chapter 4.
In the Enter Password screen, the line with the password field will be highlighted to indicate that the field on the right can
be changed. This represents a setpoint for the controller. Pressing the push’n’roll the individual field will be highlighted to
allow an easy introduction of the numeric password. By changing all fields, the 4 digits password will be entered and, if
correct, the additional settings available with that password level will be disclosed.
E
n
t
e
r
P
a
s
s
w
o
r
d
2
/
2
E
n
t
e
r
P
W
5
*
*
*
The password will time out after 10 minutes and is cancelled if a new password is entered or the control powers down.
Entering an invalid password has the same effect as continuing without a password. It is changeable from 3 to 30 minutes
via the Timer Settings menu in the Extended Menus.

D-EOMWC00803-26_01EN - 9/39
3.3 Editing
The Editing Mode is entered by pressing the navigation wheel while the cursor is pointing to a line containing an editable
field. Once in the edit mode pressing the wheel again causes the editable field to be highlighted. Turning the wheel
clockwise while the editable field is highlighted causes the value to be increased. Turning the wheel counter-clockwise
while the editable field is highlighted causes the value to be decreased. The faster the wheel is turned, the faster the value
is increased or decreased. Pressing the wheel again cause the new value to be saved and the keypad/display to leave the
edit mode and return to the navigation mode.
3.4 Basic Control System Diagnostic
MicroTech controller, extension modules and communication modules are equipped with two status LED (BSP and BUS)
toindicate the operational status of thedevices. TheBUS LED indicates thestatus of the communication with the controller.
The meaning of the two status LED is indicated below.
Main Controller (UC)
BSP LED
Mode
Solid Green
Application running
Solid Yellow
Application loaded but not running (*) or BSP Upgrade mode active
Solid Red
Hardware Error (*)
Flashing Green
BSP startup phase. The controller needs time for starting.
Flashing Yellow
Application not loaded (*)
Flashing Yellow/Red
Fail safe mode (in case that the BSP upgrade was interrupted)
Flashing Red
BSP Error (software error*)
Flashing Red/Green
Application/BSP update or inizialization
(*) Contact Service.
Extension modules
BSP LED
Mode
BUS LED
Mode
Solid Green
BSP running
Solid Green
Communication running, I/O working
Solid Red
Hardware Error (*)
Solid Red
Communication down (*)
Flashing Red
BSP Error (*)
Solid Yellow
Communication running but parameter from the application
wrong or missing, or uncorrect factory calibration
Flashing Red/Green
BSP upgrade mode
Communication modules
BSP LED (same for all modules)
BSP LED
Mode
Solid Green
BPS running, communication with controller
Solid Yellow
BSP running, no communication withcontroller (*)
Solid Red
Hardware Error (*)
Flashing Red
BSP Error (*)
Flashing Red/Green
Application/BSP update
(*) Contact Service.
BUS LED
BUS LED
LON
Bacnet MSTP
Bacnet IP
Modbus
Solid Green
Ready for Communication.
(All Parameter loaded,
Neuron configured).
Doesn't indicate a
communication with other
devices.
Ready for Communication.
The BACnet Server is
started. It doesn't indicate
an active communication.
Ready for Communication.
The BACnet Server is
started. It doesn't indicate
an active communication.
All Communication
running.
Solid Yellow
Startup
Startup
Startup. The LED stays
yellow until the module
receives a IP Address,
therefore a link must be
established.
Startup, or one configured
channel not
communicating to the
Master.
Solid Red
No Communication to
Neuron (internal error,
could be solved by
downloading a new LON
application).
BACnet Server down.
Automatically a restart
after 3 seconds are
initiated.
BACnet Server down.
Automatic restart after 3
seconds is initiated.
All configured
Communications down.
Means no communication
to the Master. The timeout
can be configured. In case
that the timeout is zero the
timeout is disabled.
Flashing
Yellow
Communication not
possible to the Neuron.
The Neuron must be
configured and set online
over the LON Tool.

D-EOMWC00803-26_01EN - 10/39
3.5 Controller maintenance
The controller requires to maintain the installed battery. Every two years it’s required to replace the battery. Battery mode l
is: BR2032 and it is produced by many different vendors.
To replace the battery remove the plastic cover of the controller display using a screw driver as shown in the following
pictures:
Be careful to avoid damages to the plastic cover. The new battery shall be placed in the proper battery holder which is
highlighted in the picture, respecting the polarities indicated into the holder itself.
3.6 Optional Remote User Interface
As an option an external Remote HMI can be connected on the UC. The Remote HMI offers the same features as the
inbuilt display plus the alarm indication done with a light emitting diode located below the bell button.
The Remote can be ordered with the unit and shipped loose as a field installed option. It can also be ordered any time after
chiller shipment and mounted and wired on the job as explained on the following page. The remote panel is powered from
the unit and no additional power supply is required.
All viewing and setpoint adjustments available on the unit controller are available on the remote panel. Navigation is
identical to the unit controller as described in this manual.
The initial screen when the remote is turned on shows the units connected to it. Highlight the desired unit and press the
wheel to access it. The remote will automatically show the units attached to it, no initial entry is required.
The Remote HMI can be extended up to 700m using the process bus connection available on the UC. With a daisy-chain
connection as below, a single HMI can be connected to up to 8 units. Refer to the specific HMI manual for details.


MicroTech