Carrier Touch Pilot Control Series, 19PV 550, 19PV 1600 Control Manual

CONTROLS MANUAL

Touch Pilot Control

19PV 550-1600

Original document

CONTENTS

1 - GENERAL DESCRIPTION ............................................................................................................................................................4

1.1 - General......................................................................................................................................................................................4

1.2 - Abbreviations ............................................................................................................................................................................. 4

2 - SAFETY CONSIDERATIONS ........................................................................................................................................................ 5

2.1 - Safety guidelines ....................................................................................................................................................................... 5

2.2 - Safety precautions.....................................................................................................................................................................5

3 - CONTROL OVERVIEW .................................................................................................................................................................6

3.1 - Control system ..........................................................................................................................................................................6

3.2 - System functionalities................................................................................................................................................................6

3.3 - Touch Pilot components ............................................................................................................................................................6

3.4 - Operating modes ....................................................................................................................................................................... 6

4 - HARDWARE DESCRIPTION .........................................................................................................................................................7

4.1 - Control boards ........................................................................................................................................................................... 7

4.2 - Power supply to boards ............................................................................................................................................................. 7

4.3 - Light emitting diodes on boards ................................................................................................................................................7

4.4 - Pressure transducers ................................................................................................................................................................ 7

4.5 - Temperature sensors .................................................................................................................................................................7

4.6 - Actuators ................................................................................................................................................................................... 8

4.7 - Terminal block connections .......................................................................................................................................................8

5 - HOW TO USE TOUCH PILOT CONTROL ....................................................................................................................................9

5.1 - User interface ............................................................................................................................................................................ 9

5.2 - Connections ..............................................................................................................................................................................9

5.3 - Touch Pilot buttons ....................................................................................................................................................................9

5.4 - Menu structure ........................................................................................................................................................................10

6 - SETTING UP TOUCH PILOT CONTROL .................................................................................................................................... 11

6.1 - General description ................................................................................................................................................................. 11

6.2 - Welcome screen ...................................................................................................................................................................... 11

6.3 - Synoptic screen ....................................................................................................................................................................... 11

6.4 - Unit start/stop .......................................................................................................................................................................... 11

6.5 - Display settings ....................................................................................................................................................................... 12

6.6 - Display language ..................................................................................................................................................................... 12

6.7 - System of measurement .........................................................................................................................................................12

6.8 - User login ................................................................................................................................................................................ 12

6.9 - Password change .................................................................................................................................................................... 12

6.10 - Main menu.............................................................................................................................................................................13

6.11  -  Conguration menu ............................................................................................................................................................... 13

6.12  -  System conguration override ............................................................................................................................................... 13

6.13 - Schedule setting .................................................................................................................................................................... 14

6.14 - Web connection .....................................................................................................................................................................15

7 - DETAILED MENU STRUCTURE .................................................................................................................................................16

7.1 - Main menu (MAINMEN1) ........................................................................................................................................................ 16

7.2  -  Conguration menu (CONFIG1)..............................................................................................................................................22

7.3 - Alarms menu ...........................................................................................................................................................................24

8 - STANDARD CONTROL OPERATIONS AND OPTIONS ............................................................................................................25

8.1 - Start/stop control ..................................................................................................................................................................... 25

8.2 - Cooling / Heating ..................................................................................................................................................................... 25

8.3 - Control interlock contact .......................................................................................................................................................... 25

8.4 - Control point ............................................................................................................................................................................ 26

8.5 - Ramp loading .......................................................................................................................................................................... 27

8.6 - Capacity control.......................................................................................................................................................................27

8.7 - Demand limit ...........................................................................................................................................................................27

8.8 - Water exchanger pumps .........................................................................................................................................................28

8.9 - Customer variable speed pump ..............................................................................................................................................28

8.10 - Condenser water valve (option 152) .....................................................................................................................................28

8.11 - Unit short cycling protection ..................................................................................................................................................28

8.12 - Refrigerant leak detection (option 159) ................................................................................................................................. 28

8.13 - Night mode ............................................................................................................................................................................ 28

8.14 - BACnet (option 149) .............................................................................................................................................................. 29

8.15 - Dry cooler (option 154) .......................................................................................................................................................... 29

8.16 - Dry cooler free cooling (option 313) ...................................................................................................................................... 29

8.17 - Master/Slave control .............................................................................................................................................................29

2

CONTENTS

9 - DIAGNOSTICS ............................................................................................................................................................................30

9.1 - Control diagnostics .................................................................................................................................................................. 30

9.2 - Current alarms.........................................................................................................................................................................30

9.3 - Alarms history ..........................................................................................................................................................................30

9.4 - Resetting alarms .....................................................................................................................................................................30

9.5  -  E-mail notications .................................................................................................................................................................. 30

9.6 - Alarms description ...................................................................................................................................................................31

10 - MAINTENANCE ......................................................................................................................................................................... 34

The illustrations in this document are for illustrative purposes only and not part of any offer for sale or contract. The manufacturer
reserves the right to change the design at any time without notice.

3

1 - GENERAL DESCRIPTION

1.1 - General

The goal of this manual is to give a broad overview of the main
functions of the Touch Pilot control system used to control and
monitor the operation of 19PV water-cooled chillers using MagLev
compressors with an integrated variable frequency drive.

Instructions in this manual are given as a guide to good practice
in the installation, start-up and operation of the control system.
This document does not contain full service procedures for the
correct operation of the equipment.

The  support  of a  qualied  Manufacturer  Service  Engineer  is 

strongly recommended to ensure optimal operation of the
equipment as well as the optimization of all available functionalities.

Note that this document may refer to optional components and
certain functions, options or accessories may not be available for

the specic unit.

IMPORTANT: All screenshots of the user interface provided
in this manual include text in English. After changing the
language of the system, all labels will be in the language
selected by the user.

Please read all instructions prior to proceeding with any work.
Pay attention to all safety warnings.

The information provided herein is solely for the purpose of
allowing customers to operate and service the equipment and it is

not  to  be reproduced,  modied  or  used  for  any  other  purpose 

without the prior consent of the Manufacturer.

1.2 - Abbreviations

In this manual, the refrigerant circuits are called circuit A and
circuit B.

Compressors in circuit A are labelled A1, A2 and compressors in
circuit B are labelled B1 and B2.

The following abbreviations are used frequently:

BMS Building Management System

EWT Entering Water Temperature

EXV Electronic Expansion Valve

LED Light Emitting Diode

LEN Internal communication bus linking the controller and

the boards

LWT Leaving Water Temperature

MagLev Magnetic Levitation

OAT Outdoor Air Temperature

4

2 - SAFETY CONSIDERATIONS

2.1 - Safety guidelines

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
structures).

Only properly qualied installation engineers and highly qualied 

installers and technicians, fully trained for the product, are
authorised 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.

Failure to comply with the instructions provided by the manufacturer 

may result in injury or product damage.

■ 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.

2.2 - Safety precautions

Only  personnel  qualied  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 the main power
supply at the main circuit breaker or isolator.

IMPORTANT: This equipment conforms to all applicable codes
regarding electromagnetic compatibility.

RISK OF ELECTROCUTION! Even when the main circuit

breaker or isolator is switched off, specic circuits may still

be energised as they may be connected to a separate power
source. MagLev compressors keep running up to 15 minutes
after power off.

RISK OF BURNS! Electrical currents may cause components
to get hot. Handle the power cable, electrical cables and
conduits, terminal box covers and motor frames with great
care.

5

3 - CONTROL OVERVIEW

3.1 - Control system

19PV units come with the Touch Pilot control that serves as a user

interface and a conguration tool for controlling the operation of 

the chiller.

3.2 - System functionalities

The system controls the start-up of the compressors needed to
maintain the desired heat exchanger entering and leaving water
temperature. It constantly manages the operation of the unit to
maintain the correct refrigerant pressure in the circuits and
monitors safety devices that protect the unit against failure and
guarantee its optimal functioning.

Touch Pilot controls:

- compressor start-up to control the water loop

- fixed or variable-speed pumps to optimise water loop
operation

3.3 - Touch Pilot components

The controller manages a number of mechanisms that allow the
unit to operate effectively, including the following:

- 7-inch touch screen

- BMS connection

- Oil-free centrifugal compressor technology

- Diagnostics

- Web connectivity / e-mail transmission

- Cooling / Heating control

- Dry Cooler Free Cooling control (optional)

- Condenser dry cooler control (optional) – only LEN connector
provided (dry cooler installed separately)

3.4 - Operating modes

Touch Pilot control may operate in three independent modes:

- Local: The unit is controlled by commands from the user
interface.

- Remote: The unit is controlled by dry contacts.

- Network: The unit is controlled by network commands. Data
communication cable is used to connect the unit to IP
connection.

When the control operates autonomously (Local or Remote),
it retains all of its control capabilities but does not offer any features
of the Network mode.

IMPORTANT: Emergency stop!
The Network emergency stop command stops the unit
regardless of its active operating type.

6

4 - HARDWARE DESCRIPTION

4.1 - Control boards

Touch Pilot is the main controller that constantly monitors the unit
and manages the information received from various pressure and
temperature probes.

The control system includes the following modules:

- Touch Pilot (controller + 7-inch user interface).

- SIOB boards that manage the major inputs and outputs of

the controller (two SIOB boards for single-circuit units and
three SIOB boards for dual-circuit units).

- AUX1 board used for controlling options such as refrigerant

leak detection, master/slave assembly control or condenser
three-way valve.

- Dry Cooler Condenser AUX1 board which is installed in the

dry cooler (see section 8.15).

- Dry Cooler Free Cooling AUX1 board which is installed in the 

dry cooler (see section 8.16).

All boards communicate via an internal bus.

4.2 - Power supply to boards

All boards are supplied from a common 24 VAC supply referred
to earth. In the event of a power supply interrupt, the unit restarts
automatically without the need for an external command. However,
any faults active when the supply is interrupted are saved and
may in certain cases prevent the unit from restarting.

CAUTION: Maintain correct polarity when connecting
the power supply to the boards, otherwise the boards may
be damaged.

4.3 - Light emitting diodes on boards

All boards continuously check and indicate the proper operation
of their electronic circuits. A light emitting diode (LED) lights on
each board when it is operating properly.

The red  LED  ashing for a two-second  period  indicates correct 

operation. A different rate indicates a board or a software failure.

The green  LED ashes continuously  on all boards to show  that 

the board is communicating correctly over its internal bus. If the

green LED is  not  ashing,  this  indicates the internal bus wiring 
problem or a conguration issue.

4.4 - Pressure transducers

The control implements two types of pressure transducers (high
pressure and low pressure) which are used to measure the suction
and discharge pressure in the circuit.

■ Discharge pressure transducers (high pressure type):

These transducers measure the discharge pressure in the circuit.
They are used to control condensing pressure or high pressure
load shedding. Discharge pressure sensors are mounted on the
discharge line piping of the circuit.

■ Suction pressure transducers (low pressure type): These
transducers measure the suction pressure in the circuit. They
are used to control EXV, evaporating pressure (in heating mode)
and monitor suction pressure safeties related to the compressor
operating envelope. Suction pressure sensors are located on
the suction piping of the circuit.

4.5 - Temperature sensors

Temperature sensors constantly measure the temperature of
various components of the unit, ensuring the correct operation
of the system.

■ Cooler entering/leaving water temperature sensors:

The cooler entering and leaving water temperature sensors are
used for capacity control and safety purposes. The water
temperature sensors are installed in the entering and leaving side.

■ Condenser entering/leaving water temperature sensors:

The condenser entering and leaving water temperature sensors
are used for heating capacity control and safety purposes.

■ Suction temperature sensors: Suction temperature sensors
are used to control temperature at the compressor inlet line in
order to ensure correct capacity control management (one sensor
per circuit).

■ Space temperature sensor: This sensor is used to measure
the space temperature.

■ DCFC option, Leaving Water Temperature sensor: This sensor
measures the dry cooler leaving water temperature. The sensor
measurement is used to control the operation of the dry cooler.

■ DCFC option, Water Loop Temperature sensor: This sensor
is used to measure the water loop temperature and it is mounted
before the water valve installed on the dry cooler. The sensor
measurement is used to verify if current conditions are suitable
for the free cooling process.

■ Air Condensing Control, Dry Cooler Leaving Water
Temperature sensor: This sensor is used to measure the

condenser water loop temperature at the exit of the Dry Cooler.
The sensor measurement is used to regulate the air exchange.

■ Air Condensing Control, Outdoor Air Temperature sensor:

This sensor is used to measure the air temperature around the
Dry Cooler. The sensor measurement is used to regulate the air
exchange.

■ Suction gas temperature sensors: Suction temperature
sensors (embedded / one per compressor) are used to control
temperature at the compressor inlet line in order to ensure
correct capacity control management. This sensor is located
at the suction side of each compressor.

■ Discharge gas temperature sensors: Discharge temperature
sensors (embedded / one per compressor) are used to control
the discharge gas temperature, and permit control of the
discharge superheat. This sensor is located at the discharge
side of each compressor.

■ Master/Slave water sensor (optional): This sensor measures
the common water temperature in the master/slave system
capacity control. It is installed only in the case of master/slave
units.

7

4 - HARDWARE DESCRIPTION

4.6 - Actuators

■ Electronic Expansion Valve: The electronic expansion valve

(EXV) is used to adjust the refrigerant ow to changes in the 

operating conditions of the machine. The high degree of
accuracy with which the piston is positioned provides precise

control of the refrigerant ow and suction superheat.

■ Staging valve: The staging valve is used during the start of

the compressor to route its ow through a bypass and to enable 

the compressor start in proper conditions.

■ Evaporator ow switch: A ow switch is mounted to ensure 
that the minimum ow rate required for the correct operation and 
protection of the system is maintained. If the ow switch fails, the 
alarm condition  shuts off the unit. The ow switch  can also be

added in the condenser exchanger (not provided with the unit).

■ Variable-speed water pumps: The controller provides a
command of speed for the evaporator water loop. The water

ow  control  is  based  on  the  heat  exchanger  temperature 

difference.

■ Water pumps (optional): The  unit can  be  tted  with  one 

evaporator and one condenser pump. The controller can
independently regulate each water heat exchanger pump.

4.7 - Terminal block connections

The “Terminal block connections” table given below summarizes
connections at the user terminal block. Connections available at
the user terminal block may vary depending on the selected options.

IMPORTANT: Some contacts can be accessed only when the
unit operates in Remote mode.

4.7.1 - Volt-free contact (on/off and cool/heat)

Contact Off Cooling Heating

On/Off switch open closed closed

Heat/Cool switch open open closed

4.7.2 - Volt-free setpoint selection contact

When the unit is under remote control, the volt-free contact is used
to determine the active setpoint. This dry contact is used to switch
between setpoints.

Contact Setpoint 1 Setpoint 2 Setpoint 3
Setpoint switch open closed closed

* Ice done contact must be open to enable “setpoint 3”

4.7.3 - Volt-free demand limit selection contact

Two dry contacts can be used to limit unit capacity.

Contact 100%

Demand limit switch #1 open closed open closed

Demand limit switch #2 open open closed closed

Limit 1

[lim_sp1]

Limit 2

[lim_sp2]

Limit 3

[lim_sp3]

Terminal block connections

Description Board Connector Remarks

On/Off switch SIOB #1 DI-01, 32-33

Heat/Cool Switch SIOB #1 DI-02, 63-64 Used to switch between heating and cooling (Remote mode only)

Demand Limit Switch #1 SIOB #1 DI-03, 73-74

Customer interlock SIOB #1

Setpoint Switch SIOB #1 DI-05, 65-66

Setpoint reset SIOB #1 AI-10, 71-72 4-20 mA signal to offset the active setpoint of the unit

Alarm relay * SIOB #1 DO-05, 30A-31A

Running Relay SIOB #1 DO-06, 37-38 Used to signal a running status (at least one compressor start)

External Pump Speed Command
of the evaporator

3-way valve control AUX1 #1 Ch 9, 80+ 80- Used to control a three way valve on the condenser water loop (optional)

Occupied Override Switch SIOB #3 DI-01, 77-78 In Remote mode closing this switch set occupancy to "yes"

Demand Limit Switch #2 SIOB #3 DI-02, 73A-74A In remote mode enables the 2nd capacity limit setpoint

Ice setpoint SIOB #3 DI-03, 75-76 Closing this input disables the ice setpoint

Condenser ow switch SIOB #3

Space temperature for reset
control

Capacity limit control SIOB #3 AI-10, 67-68 4-20 mA signal to set the demand limit of the unit

Chiller Alert state * SIOB #3 DO-05, 30B-31B Closed if an alert is present

Chiller shutdown state * SIOB #3 DO-06, 30-31 Closed if chiller is shutdown

Chiller capacity running output
(0 to 10V)

* These signals can be reversed by setting the parameter al_rever to “yes” in the GEN_CONF table.

SIOB #1 AO-01, 90+ 90 - Used to control the speed of a pump by a 0-10V signal

SIOB #3 AI-01, 71A-72A Space temperature for reset control

SIOB #3 AO-01, 79+ 79-

DI-04, 34-35

- Bypass

DI-05, 96-97

- Bypass

Used for the unit on/off control (Remote mode only):
open = unit is Off
closed = unit is on

Used to control demand limit:
open = 100% capacity can be used, no demand limitation is applied
closed = demand limitation applied

Used to control unit start/stop:
open = unit shuts down
closed = unit is allowed to operate

When the unit is under remote control, the volt-free contact is used to
determine the active setpoint (see section 8.4.1)

Used to signal an alarm:
open = inactive (no alarms active)
closed = alarm(s) active

Used to detect  the  ow  on  the  condenser  side.  It should be closed  to 

authorise the unit to start

Used to transmit the voltage level corresponding to unit production
(10V = production at full capacity)

8

5 - HOW TO USE TOUCH PILOT CONTROL

5.1 - User interface

Touch Pilot is a 7” colour touch screen with quick display of alarms,
current unit operating status, etc. It allows for web connectivity
and custom language support (control parameters displayed in
the language selected by the user).

This picture is for information only. It may differ from the actual look.

If the touch screen is not used for a long period of time,
the Welcome screen is displayed, and then it goes blank.
The control is always active and the operating mode remains
unchanged. Press anywhere on the screen and the Welcome
screen will be displayed.

5.2 - Connections

Connections are located on the bottom side of the controller.

The controller comes with two RS485 ports, where the rst port is 

used to connect to Modbus and the second RS485 port is used
for internal communication. The Ethernet port allows for TCP/IP
communication or BMS (Building Management System) connection
thanks to BACnet/IP communication.

E

Legend

1. USB connector

2. Ethernet connector

3. Internal bus (RS485)

4. Internal bus (RS485)

5. Power supply connector (24 VAC)

B

C

D

F

5.3 - Touch Pilot buttons

Home button Main Menu button Back button

Home screen displayed Main Menu displayed Go back to the previous screen

Login button Start/Stop button Alarm button

Basic access Unit is stopped (grey icon) No alarm active on the unit

User access Unit is running (green icon)

Login screen Parameters screen(s)

Login: Conrm advanced access login Save changes

Logout: Reset the user level access and go to the splash
screen

Blinking icon: Partial alarm
(one compressor affected by the
existing alarm) or Alert (no action
taken on the unit),
Steady icon: Alarm(s) active on
the unit

Cancel your modications 

Force screen (override) Navigation buttons

Set force: Override the current command (if possible)

Remove force: Remove the forced command

Displayed when the menu includes more than one page:
Go to the previous page

Displayed when the menu includes more than one page:
Go to the next page

9

5 - HOW TO USE TOUCH PILOT CONTROL

5.4 - Menu structure

Main MenuHome

Log in / Log out

Start / Stop Alarms Menu

Main menu

General Parameters

Inputs Status

Run Times Miscellaneous Status

DC Free Cooling Status

Conguration Menu

Temperatures

Outputs Status

Modes

Air Condenser Status

Pressures

Pump Status

Setpoint Table

Conguration menu

General Conguration

Reset Conguration Schedule Menu

Date/Time conguration

Pump Conguration User Conguration

Legend

Basic access

(0 = user password)

User password required

Holiday Menu

Alarms menu

Reset Alarms

Current Alarms

Alarm Historic

10

6 - SETTING UP TOUCH PILOT CONTROL

6.1 - General description

Touch Pilot includes the 7 in. touch screen allowing for easy system
control. Navigation through the Touch Pilot control is either using
the touch screen interface or by connecting to the web interface.

The navigation menus are the same for both connection methods
(Touch Pilot user interface and web browser). It is recommended
to use a stylus pen for the navigation via the touch screen.

NOTE: Some functions are unavailable when using the web
browser interface.

The Touch Pilot interface includes the following screens:

- Welcome screen

- Synoptic screen

- Operating mode selection screen

- Data/conguration screens

- Password entry and language selection screen

- Alarms screen

- Parameter modication screen

6.2 - Welcome screen

The Welcome screen is the rst screen shown  after starting the 

user interface. It displays the application name as well as the
current software version number.

To exit the Welcome screen and go to the Home screen
(see section 6.3), press the Home button.

B

6.3 - Synoptic screen

The Synoptic screen allows you to monitor the vapour-refrigeration
cycle. The diagram indicates the current status of the unit, giving
information on the unit capacity, the status of water heat exchanger

pumps, and the pre-dened setpoint parameter. 

All unit functions can be accessed by pressing the Main menu
button.

B

C

D

E

F

G

I

K

H

J

Example: Synoptic view. This picture is for information only.
It may differ from the actual look, depending on pumps and OAT sensor availability.

Legend

1. Home button

2. Main menu button

3. Login button (restricted access to menus)

4. Start/Stop button

5. Alarm button

6. Compressor + unit capacity

7. LWT and EWT (condenser)

8. Setpoint

9. Unit running status

10. LWT and EWT (evaporator)

C

D

Legend

1. Home button

2. Software version number

3. Information message box

Information message box: The information displayed in the status
bar at the bottom of the screen includes relevant messages
regarding the current user action.

Message Status

COMMUNICATION
FAILURE!

ACCESS DENIED!

LIMIT EXCEEDED! The value entered exceeds the parameter limit.

Save changes?

HIGHER FORCE IN
EFFECT!

Too many users
connected ! Please
try again later ...

Equipment controller did not respond while
reading the table content.

Equipment controller denies access to one of
the tables.

Modications have been made. The exit must 
be conrmed by pressing "Save" or "Cancel".

Equipment controller rejects Force or Auto 

command.

Too many users connected at the same time

(WEB INTERFACE ONLY)

6.4 - Unit start/stop

With the unit in the Local off mode:

• To display the list of operating modes and select the required
mode, press the Start/Stop button in the upper-right corner
of the Synoptic screen.

IMPORTANT: When entering the menu, please note that the
currently selected item corresponds to the last running
operating mode.

11

6 - SETTING UP TOUCH PILOT CONTROL

Unit start/stop screen (operating modes)

Local On

Local Schedule

Network

Remote

Master

Local On: The unit is in the local control mode and
allowed to start.

Local Schedule: The unit is in the local control mode
and allowed to start if the period is occupied.

Network: The unit is controlled by network commands
and allowed to start if the period is occupied.

Remote: The unit is controlled by external commands
and allowed to start if the period is occupied.

Master: The unit operates as the master in the master/
slave assembly and allowed to start if the period is
occupied.

To start the unit

• Press the Start/Stop button.

• Select the required Machine Mode.

• The Welcome screen will be displayed.

To stop the unit

• Press the Start/Stop button.

• Conrm  the  unit  shutdown  by  pressing  Conrm  Stop  or 
cancel the unit shutdown by pressing the Back button.

The bell located in the upper-right part of the screen lights
when any fault is detected (see section 9.1).

6.6 - Display language

Display language  can be modied  in  the User Login  Screen on 

the user interface.

To change a display language

• Press the Login button to open User Login Screen.

• Select the new language of the display.

• Press the Logged-in button to save your changes or the
Logged-off button to exit the screen without making

modications.

The control system allows users to add new languages to the
control. To learn more about language customization, please
contact your local service representative.

6.7 - System of measurement

The control offers the possibility of selecting the system of
measurement displayed on the user interface (metric / imperial).

To change a system of measurement

• Press the Login button to open User Login Screen.

• Select the system of measurement (metric or imperial).

• Press the Logged-in button to save your changes or the
Logged-off button to exit the screen without making

modications.

6.8 - User login

Only logged-in users can access congurable unit parameters. 

By default, user password is “11”.

To log in as user

• Press the Login button to open User Login Screen.

• Press the Password box. A dialog box appears.

• Provide the password (11) and press OK.

• The User Login screen appears.

• Press the Logged-in button to save your changes or the
Logged-off button to exit the screen without making

modications.

NOTE: You may also leave the User Login screen by pressing
the Back button. Your changes will be saved.

6.5 - Display settings

The User Login screen allows the user to do any of the following:

- Select the language of the controller.

- Change the system of measurement (imperial or metric).

- Gain access to more control options.

To access the User Login screen, press the Login button in the
upper-right corner of the Synoptic screen.

B

F

E

D

C

Legend

1. Cursor indicating the selected language

2. Logged-in button

3. Logged-off button

4. Password dialog box

5. System of measurement: Metric/Imperial

Security access settings

- User-level security ensures that only authorised users
are allowed to modify critical unit parameters.

- Only logged-in users are allowed to access the

Conguration menu.

- It is strongly recommended to change the default
password of the user interface to exclude the possibility

of changing any parameters by an unqualied person.

- Only people  qualied  to  manage  the  unit  should  be 
familiarized with the password.

6.9 - Password change

User password can be modied in the User Conguration menu.

To change your password

• Go to the Main Menu.

• Navigate to the Conguration menu (logged-in users only) 

and select User Conguration (USERCONF).

• Select the User Password box and provide the new

password.

• Press OK. The User Conguration screen appears.

• Press the Save button to save your changes or the Cancel

button to exit the screen without making modications.

12

6 - SETTING UP TOUCH PILOT CONTROL

6.10 - Main menu

The Main menu provides access to the main control parameters,
including general parameters, inputs and outputs status, etc.

• To access the menu, press the Main menu button located
in the upper-left part of the Synoptic screen.

• Specic unit parameters can be accessed by pressing the 
icon corresponding to the desired category.

• To go back to the Synoptic screen, press the Home button.

General parameters screen

The General parameters screen provides access to a set of general
unit parameters.

• To access the General parameters screen, go to the Main
menu and select General Parameters (GENUNIT).

• Press the Up/Down buttons to navigate between the
screens.

6.11 - Conguration menu

The  Conguration  menu  gives  access  to  a  number  of  user­modiable  parameters  such  as  pump  conguration,  schedule 
menu, etc. The Conguration menu is password-protected.

• To access the Conguration  menu, press the  Main menu 
button located in the upper-left part of the Synoptic screen,

and then nd and press Conguration Menu. 

• Press the field corresponding to the parameter to be

modied and introduce all the necessary changes. 

• Press the Up/Down buttons to navigate between the
screens.

• Once  all  the  necessary  modications  have  been  made, 
press the Save button to save your changes or the Cancel

button to exit the screen without making modications.

6.12 - System conguration override

In  some  cases  it  is  possible  to  override  system  conguration. 

The override screen provides the option to issue the command
overriding the current operation of the unit.

• To access the override screen, press the forceable point of
the data screen. Note that not all parameters can be
overridden by the control.

Legend

1. Forceable point (see section 6.12)

B

B

C

Legend

1. Set force

2. Auto (force removed)

3. Forced value

D

13

6 - SETTING UP TOUCH PILOT CONTROL

6.13 - Schedule setting

The rst timer program (schedule 1, OCCPC01S) provides a
means to automatically switch the unit from an occupied mode to
an unoccupied mode: the unit is started during occupied periods.

The second timer program (schedule 2, OCCPC02S) provides
a means to automatically switch the active setpoint from an
occupied setpoint to an unoccupied setpoint: cooling/heating
setpoint 1 is used during occupied periods and cooling/heating
setpoint 2 during unoccupied periods.

Occupancy periods

The control offers the user the possibility of setting eight occupancy
periods where each occupancy period includes the following

elements to be dened:

■ Day of the week: Select the days when the period is occupied.

■ Occupancy time (“occupied from” to “occupied to”): Set
occupancy hours for the selected days.

■ Timed Override Extension: Extend the schedule if necessary.
This parameter can be used in the case of some unplanned
events. Example: If the unit is normally scheduled to run
between 8:00 to 18:00, but one day you want the air-conditioning
system to operate longer, then set this timed override extension.
If you set the parameter to “2”, then the occupancy will end at
20:00.

To set the unit start/stop schedule

1. Go to the Main menu.

2.  Navigate to the Conguration menu (logged-in users only) and 

select Schedule (SCHEDULE).

3. Go to OCCPC01S.

4. Select appropriate check boxes to set the unit occupancy on

specic days.

5.  Dene the time of occupancy.

6. Then the time schedule is set, the selected period will be
presented in the form of the green band on the timeline.

7. Press the Save button to save your changes or the Cancel

button to exit the screen without making modications.

Example: Schedule setting (schedule 1)

Hour MON TUE WED THU FRI SAT SUN HOL

00:00 P1

1:00 P1

2:00 P1

3:00

4:00

5:00

6:00

7:00 P2 P2 P3 P4 P4 P5

8:00 P2 P2 P3 P4 P4 P5

9:00 P2 P2 P3 P4 P4 P5

10:00 P2 P2 P3 P4 P4 P5

11:00 P2 P2 P3 P4 P4 P5

12:00 P2 P2 P3 P4 P4

13:00 P2 P2 P3 P4 P4

14:00 P2 P2 P3 P4 P4

15:00 P2 P2 P3 P4 P4

16:00 P2 P2 P3 P4 P4

17:00 P2 P2 P3

18:00 P3

19:00 P3

20:00 P3 P6

21:00

22:00

23:00

Occupied

Unoccupied

MON: Monday
TUE: Tuesday
WED: Wednesday
THU: Thursday

FRI:  Friday

SAT: Saturday
SUN: Sunday
HOL: Holiday

B

C

D

E

Legend

1. Selection of days for the time schedule

2. Start/end of the schedule

3. Save

4. Cancel

5. Previous time period

6. Next time period

■ Each program is in unoccupied mode unless a schedule
time period is active.

■ If two periods overlap and are both active on the same day,
then the occupied mode takes priority over the unoccupied
period.

F

G

Period / Schedule Starts at Stops at Active on (days)
P1: Period 1 0:00 3:00 Monday
P2: Period 2 7:00 18:00 Monday + Tuesday
P3: Period 3 7:00 21:00 Wednesday
P4: Period 4 7:00 17:00 Thursday + Friday
P5: Period 5 7:00 12:00 Saturday
P6: Period 6 20:00 21:00 Holidays
P7: Period 7 Not used in this example
P8: Period 8 Not used in this example

Holidays

The control  allows the user  to dene 16 holiday periods,  where 
each period is dened by three parameters; the month, the start

day and the duration of the holiday period.

During the holiday periods, the controller will be in occupied or
unoccupied mode, depending on the periods validated as holidays.

Each holiday period can be modied by the user via the Conguration 

menu (see section 7.2).

14

6 - SETTING UP TOUCH PILOT CONTROL

6.14 - Web connection

The Touch Pilot control can be accessed via a web browser

(Internet Explorer, Mozilla Firefox, etc.). 

Connection is from a PC using a web browser with Java.

CAUTION: Use rewalls and VPN for secure connection.

6.14.1 - Web interface

To access the control, provide the IP address of the unit in the
address bar of the web browser.

B

C

Legend

1. Technical documentation button

2. Help button

Unit default address: 169.254.0.1. This address can be changed.

IMPORTANT: Only two web connections can be authorised
at the same time.

6.14.2 - Web browser settings

Minimum web browser conguration:

- Internet Explorer  (version  8 or  higher)  or  Mozilla  Firefox 
(version 26 or higher). In the advanced connection options
add the unit IP address to the exceptions list. Do not use a
proxy server.

- Java platform (version 6 or higher). In the control panel, clear

the Keep temporary les on my computer check box and use 

a direct connection.

IMPORTANT: Two users can be connected simultaneously
with no priority between them.

Note that the last modication is always taken into account.

6.14.3 - Technical documentation

When the Touch Pilot control is used via a pc web browser,
the controller allows the user to access the technical documentation
for the product.

■ Once you connect to the Touch Pilot control, click the Technical
documentation button in order to see a list of documents related
to the unit.

Technical documentation includes the following documents:

- Spare parts documentation: The list of spare parts included
in the unit with reference, description and drafting.

- Misc: Documents such as electrical plans, dimension plans,

unit certicates.

- PED: Pressure Equipment Directive.

- IOM: Installation operation and maintenance manual, controls
installation/maintenance manual.

■ Click the Help button to get access to BACnet user guide.

15

7 - DETAILED MENU STRUCTURE

7.1 - Main menu (MAINMEN1)

Icon Displayed text* Description Name

General Parameters General parameters GENUNIT

Temperatures Temperatures TEMP

Pressures Pressures PRESSURE

Inputs Status Inputs status INPUTS

Outputs Status Outputs status OUTPUTS

Modes Modes MODES

Pump Status Pump status PUMPSTAT

Miscellaneous Status Miscellaneous parameters status MSC_STAT

Run Times Run times RUNTIME

DC Free Cooling Status Dry Cooler Free Cooling status DCFC_STA

Air Condenser Status Air Condenser status AIR_COND

Setpoint Table Setpoint settings SETPOINT

Conguration Menu Conguration menu CONFIG1

*Displayed in English by default.

CAUTION: Since specic units may not include additional

features, some tables may contain parameters that cannot

be congured for a given unit.

16

7 - DETAILED MENU STRUCTURE

General Parameters Menu – GENUNIT

No. Name Status Default Unit Displayed text * Description
1 CTRL_TYP 0 to 2 0 - Local=0 Net.=1 Remote=2 Operating mode:

2 STATUS - - - Run Status Off, Running, Stopping, Delay, Trip out, Ready, Override, etc.
3 CHIL_S_S disable/

enable

4 CHIL_OCC no/yes no - Net.: Cmd Occupied Unit time schedule via Network: When the unit is in Network mode,

5 min_left - - min Minutes Left for Start Minutes before the unit start-up
6 HEATCOOL - - - Heat/Cool status Heating/cooling status: Heat/Cool
7 HC_SEL cool/heat - - Heat/Cool Select Heating/cooling selection
8 SP_SEL 0 to 2 0 - Setpoint Select Setpoint selection
9 0=Auto. 1=Spt1. 2=Spt2 0 = Auto (schedule control)

10 SP_OCC no/yes yes - Setpoint Occupied? Setpoint occupancy status
11 CAP_T 0 to 100 0 % Percent Total Capacity Total unit capacity
12 CAPA_T 0 to 100 0 % Circuit A Total Capacity Total capacity, circuit A
13 CAPB_T 0 to 100 0 % Circuit B Total Capacity Total capacity, circuit B
14 SP - - °C / °F Current Setpoint Current setpoint
15 CTRL_PNT - - °C / °F Control Point Control point: Water temperature that the unit must produce
16 TOT_CURR - - A Actual Chiller Current Actual chiller current
17 CURR_LIM 0 to 2000 0 A Chiller Current Limit Chiller current limit
18 EMSTOP disable/

enable

19 DEM_LIM 0 to 100 0 % Active Demand Limit Val Active demand limit value: When the unit is in Network mode, the

*Displayed in English by default.

disable - Net.: Cmd Start/Stop Unit start/stop via Network: When the unit is in Network mode,

disable - Emergency Stop Emergency stop: Used to stop the unit regardless of its active

0 = Local; 1 = Network; 2 = Remote 

start/stop command can be forced

the forced value can be used instead of the real occupancy state

1 = Setpoint 1
2 = Setpoint 2

operating type

minimum value will be used compared to the status of the external
limit switch contact and the demand limit switch setpoint

Temperatures Menu – TEMP

No. Name Status Default Unit Displayed text * Description

1 COOL_EWT - - °C / °F Cooler Entering Fluid Evaporator entering water temperature: Used for capacity control
2 COOL_LWT - - °C / °F Cooler Leaving Fluid  Evaporator leaving water temperature: Used for capacity control
3 COND_EWT - - °C / °F Condenser Entering Fluid Condenser entering water temperature: Used for capacity control
4 COND_LWT - - °C / °F Condenser Leaving Fluid Condenser leaving water temperature: Used for capacity control
5 SPACETMP - - °C / °F Optional Space Temp Optional space temperature
6 CHWSTEMP - - °C / °F CHWS Temperature Master/slave temperature
7 CHWSHEAT - - °C / °F CHWS Heat Temp Master/slave heating temperature
8 DGT_A - - °C / °F Discharge Gas Temp cir A Discharge gas temperature, circuit A
9 SCT_A - - °C / °F Saturated Cond Tmp cir A Saturated condensing temperature, circuit A
10 LIQT_A - - °C / °F SubCooling Temp cir A Subcooling temperature, circuit A
11 SLT_A - - °C / °F Saturated Liquid temp A Saturated liquid temperature, circuit A
12 SST_A - - °C / °F Saturated Suction Temp A Saturated suction temperature, circuit A
13 SUCT_A - - °C / °F Compressor Suction Tmp A Compressor suction temperature, circuit A
14 DGT_B - - °C / °F Discharge Gas Temp cir B Discharge gas temperature, circuit B
15 SCT_B - - °C / °F Saturated Cond Tmp cir B Saturated condensing temperature, circuit B
16 LIQT_B - - °C / °F SubCooling Temp cir B Subcooling temperature, circuit B
17 SLT_B - - °C / °F Saturated Liquid temp B Saturated liquid temperature, circuit B
18 SST_B - - °C / °F Saturated Suction Temp B Saturated suction temperature, circuit B
19 SUCT_B - - °C / °F Compressor Suction Tmp B Compressor suction temperature, circuit B

*Displayed in English by default.

17

7 - DETAILED MENU STRUCTURE

Pressures Menu – PRESSURE

No. Name Status Default Unit Displayed text * Description

1 DP_A - - kPa / PSI Discharge Pressure A Discharge gas pressure, circuit A
2 LIQP_A - - kPa / PSI SubCooling Pressure A Subcooling pressure, circuit A
3 SP_A - - kPa / PSI Main Suction Pressure A Main suction pressure, circuit A
4 DP_B - - kPa / PSI Discharge Pressure B Discharge gas pressure, circuit B
5 LIQP_B - - kPa / PSI SubCooling Pressure B Subcooling pressure, circuit B
6 SP_B - - kPa / PSI Main Suction Pressure B Main suction pressure, circuit B

*Displayed in English by default.

Inputs Status Menu – INPUTS

No. Name Status Default Unit Displayed text * Description

1 ONOFF_SW open/close open - Remote On/Off Switch Remote On/Off Switch
2 HC_SW open/close open - Remote HeatCool Switch Heating/cooling selection switch
3 SETP_SW open/close open - Remote Setpoint Switch Setpoint selection switch
4 LIM_SW1 open/close open - Limit Switch 1 Capacity limitation switch 1
5 SP_RESET - - mA Reset/Setpnt4-20mA Sgnl 4-20 mA signal, setpoint reset
6 LIM_ANAL - - mA Limit 4-20mA Signal 4-20 mA signal, capacity limitation
7 leak_v - - V Leakage detector 1 val Leak detection input 1
8 leak_2_v - - V Leakage detector 2 val Leak detection input 2
9 REM_LOCK open/close open - Customer Interlock Customer interlock status
10 ICE_SW open/close open - Ice Done Storage Switch Ice storage end switch
11 OCC_OVSW open/close open - Occupied Override Switch Occupied override switch
12 CB_Tmst open/close open - Control Box Thermostat Control box thermostat (if "open", the unit will be stopped in order

13 bacdongl no/yes no - BACnet Dongle BACnet dongle
14 HP_SW_A open/close open - High Pressure Switch A High pressure switch, circuit A
15 HP_SW_B open/close open - High Pressure Switch B High pressure switch, circuit B
16 OFA_Fb open/close open - Contactor State Cir A Circuit Contactor state, circuit A
17 OFB_Fb open/close open - Contactor State Cir B Circuit Contactor state, circuit B

*Displayed in English by default.

to limit heat in the control box)

Outputs Status Menu – OUTPUTS

No. Name Status Default Unit Displayed text * Description

1 CP_A1_PW 0 to 100 0 % Compressor A1 Load Compressor A1 load, circuit A
2 CP_A2_PW 0 to 100 0 % Compressor A2 Load Compressor A2 load, circuit A
3 EXVPosA 0 to 100 0 % EXV Position Circuit A EXV position, circuit A
4 CP_B1_PW 0 to 100 0 % Compressor B1 Load Compressor B1 load, circuit B
5 CP_B2_PW 0 to 100 0 % Compressor B2 Load Compressor B2 load, circuit B
6 EXVPosB 0 to 100 0 % EXV Position Circuit B EXV position, circuit B
7 CAPT_010 0 to 10 0 V Chiller Capacity signal Chiller capacity signal
8 ALARM off/on off - Alarm Relay Status Alarm relay status
9 RUNNING off/on off - Running Relay Status Running relay status
10 ALERT off/on off - Alert Relay State Alert relay status
11 SHUTDOWN off/on off - Shutdown Indicator State Shutdown indicator status
12 pos_3wv 0 to 100 0 % Cond 3 Way Valve Pos Condenser 3-way valve position
13 OFA_Cmd open/close open - Contactor Control Cir A Contactor Command, circuit A
14 OFB_Cmd open/close open - Contactor Control Cir B Contactor Command, circuit B
15 dcfc_vfn 0 to 100 0 % Dcfc varifan speed Dry Cooler Free Cooling, variable speed
16 dcfc_2wv open/close close - Dcfc 2 ways valve Dry Cooler Free Cooling, 2-way valve
17 dcfc_3wv 0 to 100 0 % Dcfc 3 ways valve Dry Cooler Free Cooling, 3-way valve
18 dcfc_f1 off/on off - Dcfc fan stage 1 Dry Cooler Free Cooling, fan stage 1
19 dcfc_f2 off/on off - Dcfc fan stage 2 Dry Cooler Free Cooling, fan stage 2
20 dcfc_f3 off/on off - Dcfc fan stage 3 Dry Cooler Free Cooling, fan stage 3
21 dcfc_f4 off/on off - Dcfc fan stage 4 Dry Cooler Free Cooling, fan stage 4
22 dcfc_f5 off/on off - Dcfc fan stage 5 Dry Cooler Free Cooling, fan stage 5
23 dcfc_f6 off/on off - Dcfc fan stage 6 Dry Cooler Free Cooling, fan stage 6
24 dcfc_f7 off/on off - Dcfc fan stage 7 Dry Cooler Free Cooling, fan stage 7

*Displayed in English by default.

18

7 - DETAILED MENU STRUCTURE

Modes Menu – MODES

No. Name Status Default Unit Displayed text * Description

1 m_delay no/yes no - Start Up Delay In Effect Start-up delay in effect
2 m_2stpt no/yes no - Second Setpoint In Use Second setpoint in use
3 m_reset no/yes no - Reset In Effect Setpoint reset active
4 m_demlim no/yes no - Demand limit active Demand limit active
5 m_MaxCon no/yes no - Maximum Condens. Limit Maximum condensing limitation active
6 m_MinCoo no/yes no - Minimum Cooling Limit Maximum cooling limitation active
7 m_ramp_l no/yes no - Ramp Limit reached Capacity is limited by ramp logic
8 m_pmpper no/yes no - Pump Periodic Start Periodic cooler pump start-up
9 m_night no/yes no - Night Low Noise Active Night mode active
10 m_slave no/yes no - Master Slave Active Master/slave active
11 m_cpmppr no/yes no - Cond Pump Periodic Start Periodic condenser pump start-up
12 m_ice no/yes no - Ice Mode In Effect Ice storage mode active

*Displayed in English by default.

Pump Status Menu – PUMPSTAT

No. Name Status Default Unit Displayed text * Description

1 SET_FLOW no/yes no - Cooler Flow Setpoint Out Evaporator ow setpoint output
2 CPUMP_1 off/on off - Cooler Pump #1 Command Evaporator pump control command
3 FLOW_SW open/close open - Cooler Flow Switch Cooler ow switch
4 HPUMP_1 off/on off - Condenser Pump

Command1

5 CONDFLOW open/close open - Condenser Flow Status Condenser ow switch 

*Displayed in English by default.

Condenser pump control command

Miscellaneous Status Menu – MSC_STAT

No. Name Status Default Unit Displayed text * Description

1 m_ecopmp no/yes no - Eco Pump Mode Active Eco pump mode active (see section 8.8.3)

*Displayed in English by default.

Run Times Menu – RUNTIME

No. Name Status Default Unit Displayed text * Description

1 HR_MACH - - hour Machine Operating Hours Unit operating hours
2 st_mach - - - Machine Starts Number Number of unit starts
3 hr_cpa1 - - hour Compressor A1 Hours Operating hours, compressor A1
4 st_cpa1 - - - Compressor A1 Starts Number of starts, compressor A1
5 hr_cpa2 - - hour Compressor A2 Hours Operating hours, compressor A2
6 st_cpa2 - - - Compressor A2 Starts Number of starts, compressor A2
7 hr_cpb1 - - hour Compressor B1 Hours Operating hours, compressor B1
8 st_cpb1 - - - Compressor B1 Starts Number of starts, compressor B1
9 hr_cpb2 - - hour Compressor B2 Hours Operating hours, compressor B2
10 st_cpb2 - - - Compressor B2 Starts Number of starts, compressor B2
11 hr_cpum1 - - hour Cooler Pump #1 Hours Operating hours, evaporator pump
12 hr_hpum1 - - hour Condenser Pump #1

Hours

*Displayed in English by default.

Operating hours, condenser pump

19

7 - DETAILED MENU STRUCTURE

DC Free Cooling Status Menu – DCFC_STA

No. Name Status Default Unit Displayed text * Description

1 oat - - °C / °F OAT Free Cooling Free Cooling / Dry cooler: OAT
2 lwt - - °C / °F FC Leaving Water Temp Free Cooling / Dry Cooler: Leaving water temperature
3 wloop - - °C / °F FC Water Loop Temp Free Cooling / Dry Cooler: Water loop temperature
4 m_dcfc no / yes no - Free Cooling Mode Active Free Cooling mode active
5 dcfc_cap 0 to 100 0 % FC Capacity Free Cooling / Dry Cooler capacity
6 dcfc_al normal /

alarm
7 f_stage 0 to 10 0 - Fans Stage Free Cooling / Dry Cooler fan stage (x-speed fans)
8 vf_speed 0 to 100 0 % Varifan Speed Free Cooling / Dry Cooler: Fan speed (variable-speed fans)
9 pid_out 0 to 100 0 % PID Output Status of PID output
10 FC_HOUR 0 to 999999 0 hour DCFC Operating Hours Free Cooling / Dry cooler: Operating hours
11 FC_FAN1S 0 to 999999 0 - DCFC Fan Stage 1 Start DCFC / Fan stage 1: Number of starts
12 FC_FAN1H 0 to 999999 0 hour DCFC Fan Stage 1 Hours DCFC / Fan stage 1: Operating hours
13 FC_FAN2S 0 to 999999 0 - DCFC Fan Stage 2 Start DCFC / Fan stage 2: Number of starts
14 FC_FAN2H 0 to 999999 0 hour DCFC Fan Stage 2 Hours DCFC / Fan stage 2: Operating hours
15 FC_FAN3S 0 to 999999 0 - DCFC Fan Stage 3 Start DCFC / Fan stage 3: Number of starts
16 FC_FAN3H 0 to 999999 0 hour DCFC Fan Stage 3 Hours DCFC / Fan stage 3: Operating hours
17 FC_FAN4S 0 to 999999 0 - DCFC Fan Stage 4 Start DCFC / Fan stage 4: Number of starts
18 FC_FAN4H 0 to 999999 0 hour DCFC Fan Stage 4 Hours DCFC / Fan stage 4: Operating hours
19 FC_FAN5S 0 to 999999 0 - DCFC Fan Stage 5 Start DCFC / Fan stage 5: Number of starts
20 FC_FAN5H 0 to 999999 0 hour DCFC Fan Stage 5 Hours DCFC / Fan stage 5: Operating hours
21 FC_FAN6S 0 to 999999 0 - DCFC Fan Stage 6 Start DCFC / Fan stage 6: Number of starts
22 FC_FAN6H 0 to 999999 0 hour DCFC Fan Stage 6 Hours DCFC / Fan stage 6: Operating hours
23 FC_FAN7S 0 to 999999 0 - DCFC Fan Stage 7 Start DCFC / Fan stage 7: Number of starts
24 FC_FAN7H 0 to 999999 0 hour DCFC Fan Stage 7 Hours DCFC / Fan stage 7: Operating hours
25 FC_VFANS 0 to 999999 0 - DCFC Variable Fan Start DCFC / Variable-speed fan: Number of starts
26 FC_VFANH 0 to 999999 0 hour DCFC Variable Fan Hours DCFC / Variable-speed fan: Operating hours

*Displayed in English by default.

normal - DCFC process is in alarm Dry Cooler Free Cooling process failure

Air Condenser Status Menu – AIR_COND

No. Name Status Default Unit Displayed text * Description

1 oat - - °C / °F Outdoor Air Temperature Outdoor air temperature
2 Dry Cooler Status Status of the Dry Cooler connected on the condenser side
3 DC_LWT - - °C / °F Leaving Water Temp Leaving water temperature
4 DC_FanSt - - - Runing Fan Stages Running fan stages
5 DC_FanSp - - % Variable Speed Variable Speed
6 Air Condensing Status of the air condenser connected to the refrigerant circuits
7 FanSt_A - - - Circuit A Fan Stages Circuit A Fan Stages
8 FanSp_A - - % Variable Speed Fan A Variable-speed Fan, circuit A
9 FanSt_B - - - Circuit B Fan Stages Circuit B Fan Stages
10 FanSp_B - - % Variable Speed Fan B Variable-speed Fan, circuit B
11 Runtime Runtime
12 COND_F1S - - - Condensing Fan 1 Start Condensing fan 1: Number of starts
13 COND_F1H - - hour Condensing Fan 1 Hours Condensing fan 1: Operating hours
14 COND_F2S - - - Condensing Fan 2 Start Condensing fan 2: Number of starts
15 COND_F2H - - hour Condensing Fan 2 Hours Condensing fan 2: Operating hours
16 COND_F3S - - - Condensing Fan 3 Start Condensing fan 3: Number of starts
17 COND_F3H - - hour Condensing Fan 3 Hours Condensing fan 3: Operating hours
18 COND_F4S - - - Condensing Fan 4 Start Condensing fan 4: Number of starts
19 COND_F4H - - hour Condensing Fan 4 Hours Condensing fan 4: Operating hours
20 COND_F5S - - - Condensing Fan 5 Start Condensing fan 5: Number of starts
21 COND_F5H - - hour Condensing Fan 5 Hours Condensing fan 5: Operating hours
22 COND_F6S - - - Condensing Fan 6 Start Condensing fan 6: Number of starts
23 COND_F6H - - hour Condensing Fan 6 Hours Condensing fan 6: Operating hours
24 COND_F7S - - - Condensing Fan 7 Start Condensing fan 7: Number of starts
25 COND_F7H - - hour Condensing Fan 7 Hours Condensing fan 7: Operating hours
26 COND_F8S - - - Condensing Fan 8 Start Condensing fan 8: Number of starts
27 COND_F8H - - hour Condensing Fan 8 Hours Condensing fan 8: Operating hours
28 CirA_VFS - - - Cond VariFan CirA Start Condensing variable-speed fan (circuit A): Number of starts
29 CirA_VFH - - hour Cond VariFan CirA Hour Condensing variable-speed fan (circuit A): Operating hours
30 CirB_VFS - - - Cond VariFan CirB Start Condensing variable-speed fan (circuit B): Number of starts
31 CirB_VFH - - hour Cond VariFan CirB Hour Condensing variable-speed fan (circuit B): Operating hours

*Displayed in English by default.

20

7 - DETAILED MENU STRUCTURE

Setpoint Table Menu – SETPOINT

No. Name Status Default Unit Displayed text * Description

1 csp1 -28.9 to 26.0

2 csp2 -28.9 to 26.0

3 ice_sp -28.9 to 26.0

4 cramp_sp 0.11 to 11.11

5 hsp1 26.7 to 63.0

6 hsp2 26.7 to 63.0

7 hramp_sp 0.11 to 11.11

8 w_sct_sp 26.67 to 48.89

9 lim_sp1 0 to 100 100 % Switch Limit Setpoint 1 Demand limit setpoint 1
10 lim_sp2 0 to 100 100 % Switch Limit Setpoint 2 Demand limit setpoint 2
11 lim_sp3 0 to 100 100 % Switch Limit Setpoint 3 Demand limit setpoint 3

*Displayed in English by default.

-20 to 78.8

-20 to 78.8

-20 to 78.8

0.2 to 20

80 to 145.4

80 to 145.4

0.2 to 20

80 to 120

6.7
44

6.7
44

6.7
44

0.6
1

37.8
100

37.8
100

0.6
1

35
95

°C

°F

°C

°F

°C

°F

^C

^F

°C

°F

°C

°F

^C

^F

°C

°F

Cooling Setpoint 1 Cooling setpoint 1 (used during occupied periods)

Cooling Setpoint 2 Cooling setpoint 2 (used during unoccupied periods)

Cooling Ice Setpoint Cooling ice setpoint

Cooling Ramp Loading Cooling ramp loading setpoint (rate at which the water temperature

may change within one minute)

Heating Setpoint 1 Heating setpoint 1 (used during occupied periods)

Heating Setpoint 2 Heating setpoint 2 (used during unoccupied periods)

Heating Ramp Loading Heating ramp loading setpoint (rate at which the water temperature

may change within one minute)

Water Val Condensing Stp Condensing setpoint

21

7 - DETAILED MENU STRUCTURE

7.2 - Conguration menu (CONFIG1)

Icon Displayed text* Description Name

General Conguration General conguration parameters GEN_CONF 

Pump Conguration Pump conguration PUMPCONF

User Conguration User conguration USERCONF

Reset Conguration Reset conguration RESETCFG

Schedule Menu Schedule settings SCHEDULE

Holiday Menu Holiday settings HOLIDAY

Date/Time conguration Date/Time settings DATETIME

*Displayed in English by default.

CAUTION: Since specic units may not include additional

features, some tables may contain parameters that cannot

be congured for a given unit.

General Conguration Menu – GEN_CONF

No. Name Status Default Unit Displayed text * Description

1 prio_cir 0 to 2 0 - Cir Priority Sequence Circuit priority
2 0=Auto, 1=A Prio 0 = Automatic circuit selection

3 2=B Prio 2 = Circuit B priority
4 ramp_sel no/yes no - Ramp Loading Select Ramp loading selection
5 off_on_d 1 to 15 1 min Unit Off to On Delay Unit Off to On delay
6 lim_sel 0 to 2 0 - Demand Limit Type Select Demand limit type
7 0 = None 0 = None
8 1 = Switch Control 1 = Switch control
9 2 = 4-20mA Control 2 = 4-20mA control
10 nh_start 00:00 00:00 - Night Mode Start Hour Night mode start hour
11 nh_end 00:00 00:00 - Night Mode End Hour Night mode end hour
12 nh_limit 0 to 100 100 % Night Capacity Limit Night capacity limit
13 curr_sel no/yes no - Current Limit select Current limitation select
14 ice_cnfg no/yes no - Ice Mode Enable Ice mode
15 curr_max 0 to 4000 2000 A Maximum Current Limit Maximum current limitation
16 shortcyc no/yes no - short cycle management Short cycle management
17 al_rever no/yes no - Reverse Alarms Relay Reverse alarm/alert signals
18 capre_en no/yes no - Enable capacity recovery Capacity recovery in case of power outage
19 capre_t 0 to 10 0 min Capa rec max off time Maximum time with power off for capacity recovery

*Displayed in English by default.

1 = Circuit A priority

22

7 - DETAILED MENU STRUCTURE

Pump Conguration Menu – PUMPCONF

No. Name Status Default Unit Displayed text * Description

1 hpumpseq 0 to 1 0 - Condenser Pumps

2 cpumpseq 0 to 1 0 - Cooler Pumps Sequence Cooler pumps sequence
3 0 = No Pump 0 = no pump
4 1 = One Pump Only 1 = one pump only
5 pump_per no/yes no - Pump Sticking Protection Pump anti-sticking protection
6 pump_sby no/yes no - Stop Pump During Standby Pump stopped during standby
7 pump_loc no/yes yes - Flow Checked If Pump Off Water ow is checked when the pump is off
8 stopheat no/yes no - Cooler Pump Off In Heat Cooler pump is off when the unit is in Heating
9 stopcool no/yes no - Cond Pump Off In Cool Condenser pump is off when the unit is in Cooling

*Displayed in English by default.

Sequence

Reset Conguration Menu – RESETCFG

No. Name Status Default Unit Displayed text * Description

1 cr_sel 0 to 4 0 - Cooling Reset Select Reset source in Cooling
2 hr_sel 0 to 4 0 - Heating Reset Select Reset source in Heating
3 0=None, 1=OAT 0 = None

4 2=Delta T, 4=Space Temp 2 = Delta T

5 3=4-20mA control 3 = 4-20 mA signal
6
7 Cooling Cooling
8 oat_crno -10 to 51.7

9 oat_crfu -10 to 51.7

10 dt_cr_no 0 to 13.9

11 dt_cr_fu 0 to 13.9

12 v_cr_no 0 to 20 0 mA Current No Reset Value Current, no reset value
13 v_cr_fu 0 to 20 0 mA Current Full Reset Value Current, max. reset value
14 spacr_no -10 to 51.7

15 spacr_fu -10 to 51.7

16 cr_deg -16.7 to 16.7

17
18 Heating Heating
19 oat_hrno -10 to 51.7

20 oat_hrfu -10 to 51.7

21 dt_hr_no 0 to 13.9

22 dt_hr_fu 0 to 13.9

23 v_hr_no 0 to 20 0 mA Current No Reset Value Current, no reset value
24 v_hr_fu 0 to 20 0 mA Current Full Reset Value Current, max. reset value
25 spahr_no -10 to 51.7

26 spahr_fu -10 to 51.7

27 hr_deg -16.7 to 16.7

*Displayed in English by default.

14 to 125

14 to 125

0 to 25

0 to 25

14 to 125

14 to 125

-30 to 30

14 to 125

14 to 125

0 to 25

0 to 25

14 to 125

14 to 125

-30 to 30

-10
14

-10
14

0
0

0
0

-10
14

-10
14

0
0

-10
14

-10
14

0
0

0
0

-10
14

-10
14

0
0

°C°FOAT No Reset Value OAT, no reset value

°C°FOAT Full Reset Value OAT, max. reset value

^C^FDelta T No Reset Value Delta T, no reset value

^C^FDelta T Full Reset Value Delta T, max. reset value

°C°FSpace T No Reset Value Space temperature, no reset value

°C°FSpace T Full Reset Value Space temperature, max. reset value

^C^FCooling Reset Deg. Value Cooling reset value

°C°FOAT No Reset Value OAT, no reset value

°C°FOAT Full Reset Value OAT, max. reset value

^C^FDelta T No Reset Value Delta T, no reset value

^C^FDelta T Full Reset Value Delta T, max. reset value

°C°FSpace T No Reset Value Space temperature, no reset value

°C°FSpace T Full Reset Value Space temperature, max. reset value

^C^FHeating Reset Deg. Value Heating reset value

Condenser pumps sequence

1 = OAT

4 = Space temperature

(applies to units with a Dry Cooler at the condenser)

(applies to units with a Dry Cooler at the condenser)

(applies to units with a DryCooler at the condenser)

(applies to units with a DryCooler at the condenser)

23

7 - DETAILED MENU STRUCTURE

User Conguration Menu – USERCONF

No. Name Status Default Unit Displayed text * Description

1 use_pass 0 to 9999 11 - User Password User  password:  The  user password can be  modied  by  changing 

*Displayed in English by default.

Schedule Menu – SCHEDULE

No. Name Status Default Unit Displayed text * Description

1 OCCPC01S - - - OCCPC01S - Schedule

Menu

2 OCCPC02S - - - OCCPC02S - Schedule

Menu

*Displayed in English by default.

Holiday Menu – HOLIDAY

No. Name Status Default Unit Displayed text * Description

1 HOL_MON 0-12 0 - Holiday Start Month Holiday start month
2 HOL_DAY 0-31 0 - Start Day Holiday start day
3 HOL_LEN 0-99 0 - Duration (days) Holiday duration (days)

*Displayed in English by default.

the value in this line

Unit on/off time schedule

Unit setpoint selection time schedule

Date/Time Conguration Menu – DATETIME

No. Name Status Default Unit Displayed text * Description
Date (DD/MM/YYYY)

1 d_of_m 1 to 31 - - Day of month Day of the month
2 month 1 to 12 - - Month of year Month
3 year 20nn - - Year Year
4 dow Monday-

Sunday

Time (HH:MM)

5 hour 0 to 24 - h Hour Hour
6 minute 0 to 59 min Minute Minutes

Daylight Saving Time

7 dlig_on no/yes - - Daylight sav. time on Daylight saving time active
8 dlig_off no/yes - - Daylight sav. time off Daylight saving time inactive
9 tom_hol no/yes - - Tomorrow is a holiday The following day is a holiday
10 tod_hol no/yes - - Today is a holiday The present day is a holiday

*Displayed in English by default.

- - Day of Week Day of the week

7.3 - Alarms menu

Icon Displayed text* Description Name

Reset Alarms Reset Alarm(s) ALARMRST

Current Alarms Current Alarm(s) CUR_ALRM

Alarm Historic Alarms History ALMHIST1

*Displayed in English by default.

24

8 - STANDARD CONTROL OPERATIONS AND OPTIONS

8.1 - Start/stop control

The unit state is determined based on a number of factors,
including its operating type, active overrides, open contacts,

master/slave conguration, or alarms.

The table given below summarizes the unit control type [ctrl_typ]
and its running status with regard to the following parameters:

■ Operating type: This operation type is selected using the Start/
Stop button on the user interface.

LOFF Local off

L-C Local on

L-SC Local schedule

Rem Remote

Net Network

Mast Master unit

■ Start/stop force command [CHIL_S_S]: Start/stop force
command can be used to control the chiller state in the Network
mode.

- Command set to stop: The unit is halted.

- Command set to start: The unit runs according to schedule 1.

■ Remote start/stop contact status [Onoff_sw]: Start/stop
contact status can be used to control the chiller state in the
Remote operating type.

■ Master control type [ms_ctrl]: When the unit is the master
unit in a two-chiller master/slave arrangement, the master unit
may be set to be controlled locally, remotely or via network.

■ Start/stop schedule [chil_occ]: Occupied or unoccupied
status of the unit.

■ Network emergency stop command [EMSTOP]: If activated,
the unit shuts down regardless of the active operating type.

■ General alarm: The unit shuts down due to failure.

8.2 - Cooling / Heating

The table below summarises the unit operation based on the
following parameters:

■ Unit On/Off status: This parameter indicates whether the unit
is shut down (not authorised to start) or in operation (authorised
to start).

■ Control type: Indicates whether the unit operates in Local,
Remote or Network mode.

■ Heating/Cooling selection in Local mode: The operating mode
is selected via the user interface (GENUNIT menu).

■ Heat/Cool switch status in Remote mode: This contact is active
only when the unit is under remote control.

■ Heat/Cool selection in Network mode: The network command
[HC_SEL] permits heating/cooling control if the unit is in
Network operating mode.

Status

Control

Off - - - - -

On local cool - - cooling

On local heat - - heating

On remote - on_cool - cooling

On remote - on_heat - heating

On network - - cool cooling

On network - - heat heating

type

Heat/Cool

in Local

Heat/Cool

in Remote

Heat/Cool

in Network

Current unit

operating

mode

8.3 - Control interlock contact

This contact checks the status of a loop (customer safety loop).
It prevents the unit from starting if it is open when the delay at
start-up has expired. This open contact leads to an alarm shut­down, if the unit is running (alarm 10014).

Active operating type Parameters' status

LOFF L-C L-Sc Rem Net Mast

active local

active unoccupied local

active open remote

active unoccupied remote

active disable network

active unoccupied network

active local unoccupied local

active open remote remote

active remote unoccupied remote

active disable network network

active network unoccupied network

active disable no local

active occupied disable no local

active closed occupied disable no remote

active enable occupied disable no network

active local occupied disable no local

active closed remote occupied disable no remote

active enable network occupied disable no network

Start/

Stop force

command

Remote start/

stop contact

Master
control

type

Start/Stop

schedule

Network

Emergency

Shutdown

enable

Alarm

shutdown

yes

Control

type

Unit

state

off

off

off

off

off

off

off

off

off

off

off

off

off

on

on

on

on

on

on

on

IMPORTANT: When the unit is stopping or there is a demand to stop the unit, compressors are stopped consecutively. In case
of emergency stop, all compressors are stopped at the same time.

25

8 - STANDARD CONTROL OPERATIONS AND OPTIONS

8.4 - Control point

The control point represents the water temperature that the unit
must produce. The control point calculation is based on the active
setpoint and its reset.

control point = active setpoint + reset

The heat exchanger entering water temperature is controlled by
default, but the heat exchanger leaving water temperature can

also be controlled (service conguration is required).

8.4.1 - Active setpoint

Three setpoints can be selected as active in Cooling mode and
two setpoints in Heating mode.

Setpoint 1 Setpoint 2 Setpoint 3

Cooling Occupied period Unoccupied period

Heating Occupied period Unoccupied period -

The rst cooling/heating setpoint is normally used during occupied 

periods, whereas the second cooling/heating setpoint is used
during unoccupied periods. The third cooling setpoint is used for
ice storage.

Local operating mode

Heat/Cool

[hc_sel]

cool sp-1 - * * - cooling setpoint 1

cool sp-2 no * * - cooling setpoint 2

cool sp-2 yes close * cooling setpoint 2

cool sp-2 yes open * ice setpoint

cool auto - * * occupied cooling setpoint 1

cool auto no * * unoccupied cooling setpoint 2

cool auto yes close * unoccupied cooling setpoint 2

cool auto yes open * unoccupied ice setpoint

heat sp-1 - * * - heating setpoint 1

heat sp-2 - * * - heating setpoint 2

heat auto - * * occupied heating setpoint 1

heat auto - * * unoccupied heating setpoint 2

(*) any conguration, (-) default conguration

Setpoint

[sp_sel]

Ice mode enabled

[Ice_cnfg]

Ice storage

cooling setpoint

Parameters status

Ice done switch

[Ice_sw]

Depending on the current operating type, the active setpoint can
be selected:

- By choosing the active setpoint in the General Parameters
menu (Setpoint Select, GENUNIT).

- Via the volt-free contacts (see section 4.7).

- Via network commands [SP_SEL].

- Via the schedule setting – schedule 2 (OCCPC02S).

Mode Setpoint control

Local

Remote

Network

Regardless of the current setpoint schedule, the user can select
the setpoint manually via the control interface (Setpoint Select,
GENUNIT).

If the setpoint switch is used once, the setpoint schedule control
will be cancelled (setpoint control will be based on setpoint
switch only).

Regardless of the current setpoint schedule, the user can select
the setpoint manually via the control interface (Setpoint Select,
GENUNIT) or the service tool. Once the forced selection is
deactivated, the setpoint schedule will be used again.

The following tables summarise the possible setpoint selections
based on the control type (local, remote, network) and the following
parameters:

- Heating/Cooling operating mode.

- Setpoint select.

- Setpoint selection contact status.

- Schedule 2 status for setpoint selection.

Setpoint switch

[setp_sw]

Setpoint occupancy

[sp_occ]

Active setpoint

Remote operating mode

Parameters status

Heat/Cool

[hc_sel]

cool - - * open - cooling setpoint 1

cool - no * close - cooling setpoint 2

cool yes close close cooling setpoint 2

cool - yes open close - ice setpoint

heat - - * open - heating setpoint 1

heat - - * close - heating setpoint 2

(*) any conguration, (-) default conguration

Setpoint

[sp_sel]

Ice mode enabled

[Ice_cnfg]

Ice done switch

[Ice_sw]

Setpoint switch

[setp_sw]

Setpoint occupancy

[sp_occ]

Active setpoint

Network operating mode

Parameters status

Heat/Cool

[hc_sel]

cool - - * * occupied cooling setpoint 1

cool - - * * unoccupied cooling setpoint 2

heat - - * * occupied heating setpoint 1

heat - - * * unoccupied heating setpoint 2

(*) any conguration, (-) default conguration

Setpoint

[sp_sel]

Ice mode enabled

[Ice_cnfg]

Ice done switch

[Ice_sw]

Setpoint switch

[setp_sw]

Setpoint occupancy

[sp_occ]

Active setpoint

26

8 - STANDARD CONTROL OPERATIONS AND OPTIONS

8.4.2 - Reset

Reset means that the active control point is modied so that the 

machine capacity required is adjusted to be as close as possible
to the demand.

The reset source can be provided by one of the following:

■ Outdoor air temperature that gives a measure of the load
trends for the building. This reset source is applicable only to
units with option 154 (see section 8.15).

■ Return water temperature  (heat  exchanger  ΔT  gives  an 

average building load). Delta T (ΔT) is the difference between 
leaving  and  entering uid  temperatures  (LWT  minus  EWT).

When the load is light, temperature difference across the
exchanger will be relatively small. The reset value should be
configured by the user and its configuration may differ
depending on the size of the water exchanger.

■ 4-20 mA reset signal provided by an active sensor connected
to the input: If the reading of the 4-20 mA signal/external
temperature value increases (load is lighter), then the current
setpoint will be lowered.

■ Space temperature reset based on the space temperature
sensor reading.

The source of the reset can be congured in the Reset Conguration 
menu (RESETCFG). In response to a change in delta T, 4-20 mA

reset signal reading, or space temperature, the control point is
reset to optimise unit performance.

To set the source of the reset

1.  Navigate to the Conguration menu.

2. Select Reset Conguration (RESETCFG).

3. Set Cooling Reset Select [cr_sel] or Heating Reset Select
[hr_sel].

Cooling Reset Select [cr_sel]
Heating Reset Select [hr_sel]

0 = none
1 = OAT *
2 = delta T
3 = 4-20 mA
4 = Space Temp

* OAT reset applies to units with option 154 (see section 8.15).

The unit normally uses two control point reset types, cooling control
point reset or heating control point reset.

Dry cooler condenser option has condensing setpoint reset which
can be applied if the condensing setpoint control depends on
outdoor air temperature reading (reset source = OAT). See also
section 8.15.

Reset is a linear interpolation function based on the following
three parameters:

■ A reference at which reset is zero (OAT / delta T / 4-20 mA
signal / space temp. – no reset value).

■ A reference at which reset is maximum (OAT / delta T / 4-20 mA
signal / space temp. – full reset value).

■ The maximum possible reset value: The difference between
the lowest reset value (no reset value) and the highest possible
reset value (full reset value). Cooling / Heating Reset Deg.
Value represents the maximum possible reset.

Reset parameters, i.e. slope, reset, and maximum value, are

congurable in the Reset Conguration menu (RESETCFG).

Cooling mode: Cooling control point reset is used to control the
evaporator water temperature reset.

Heating mode: Heating control point reset is used to control the
condenser water temperature reset.

Heating reset may be used to reset the condensing setpoint for
optimised condenser operation. This is only possible on the outside
temperature. Delta T is not used.

Reset example in Cooling mode for the space temperature

Reset value

Legend

A: Maximum reset value
B: Space temperature for zero reset
C: Space temperature for maximum reset
D: Building load

8.5 - Ramp loading

The control provides the ramp loading function used to minimise
the rate at which the water temperature changes. The minimum
speed is calculated based on saturated condensing temperature
and saturated suction temperature. Ramp loading sequence can

be enabled  by  the  user (Ramp  Loading  Select,  GEN_CONF  – 
General Conguration).

8.6 - Capacity control

The unit is tted with oil-free centrifugal compressors with magnetic 

bearings. Each circuit may have one or two compressors installed.
Compressors are controlled in such a way in order to provide the
best possible COP. Variable-speed centrifugal compressors exhibit

better performance at part load conditions; therefore, the control 

system would normally start both circuits as soon as needed.
The Touch Pilot control adjusts the compressor capacity to keep
the heat exchanger water temperature at its setpoint.

8.7 - Demand limit

The demand limit functionality is used to limit the unit power
consumption whenever possible.

The control allows limitation of the unit capacity:

■ By means of user-controlled volt-free contacts: The unit capacity
can never exceed the limit setpoint activated by these contacts.

The limit setpoints can be modied in the SETPOINT menu.

■ By setting DEM_LIM when the unit is in Network mode.

■ By lag limit set by the master unit (master/slave assembly).
If the unit is not in the Master/Slave assembly, the lag limit value
is equal to 100%.

■ By  night  capacity  limitation.  The  limit  can  be  modied  in  the 

GEN_CONF menu. 

Capacity limitation is expressed in percentage, where a limit value
of 100% means that the unit may run with its full capacity (no
limitation is implemented).

% Building load

27

8 - STANDARD CONTROL OPERATIONS AND OPTIONS

8.8 - Water exchanger pumps

The unit can control one evaporator water pump and one
condenser water pump. The pump can be turned on only when

this option is congured (PUMPCONF) and when the unit is in 

one of the “on” modes described in section 8.1 or in “delay” mode.

The Touch Pilot control provides the signal to command the pump,
but it does not include the protection of the pump itself (low water
pressure, overload, etc.).

8.8.1 - Pump operation

The pump keeps running for about 20 seconds after the unit goes
to the stopping mode. The pump is turned off if the unit is shut
down due to an alarm unless the fault is a freeze protection error.
The pump can be started in particular operating conditions when
freeze protection of the heat exchanger is active.

Since the minimum value for the delay at start-up is 1 minute

(congurable between 1 and 15 minutes), the pump will run for at 
least one minute before the rst compressor starts.

If congured, the cooler pump can be stopped when the unit is in 

Heating and the condenser pump can be stopped when the unit
is in Cooling mode.

To set cooler pump behaviour in Heating mode OR condenser
pump behaviour in Cooling mode

1.  Navigate to the Conguration menu.

2. Select Pump Conguration (PUMPCONF).

3. Set Cooler Pump Off In Heat [stopheat] or Cond Pump Off In
Cool [stopcool] to “yes”.

Cooler Pump Off In Heat [stopheat]

Cond Pump Off In Cool [stopcool]

no/yes yes

NOTE: The water pump can also be stopped when the unit is
in Standby mode (see section 8.8.3).

8.8.2 - Pump protection (pump anti-stick function)

The control provides a means to automatically start the pump each
day at 14:00 for 2 seconds when the unit is off.

Starting the pump periodically for a few seconds extends the
lifetime of the pump bearings and the tightness of the pump seal.

To set pump sticking protection

1.  Navigate to the Conguration menu.

2. Select Pump Conguration (PUMPCONF).

3. Set Pump Sticking Protection [pump_per] to “yes”.

Pump Sticking Protection [pump_per]

no/yes yes

8.8.3 - Standby pump (xed speed pumps only)

The control provides the Eco pump functionality which allows for

stopping the pump periodically when the unit is in satised mode 

(no cooling or heating is required).

The Eco pump mode can be applied to the condenser pump when
the unit is in Heating mode and the cooler pump when in Cooling
mode.

To verify pump behaviour in Standby mode

1. Navigate to the Main menu.

2. Select Miscellaneous Status (MSC_STAT).

3. Verify Eco Pump Mode Active [m_ecopmp].

Eco Pump Mode Active [m_ecopmp]

no/yes yes

IMPORTANT: The Eco pump functionality can be enabled only
by service technicians.

8.9 - Customer variable speed pump

As standard the unit provides the functionality to control a variable

speed pump. It is possible to control the water ow to keep constant 

temperature difference on the evaporator water exchanger.

Pump speed control may also be optimised by the installer
(service-access level required).

The pump is turned on and off the same way that the xed speed 

pump, excluding the situation when the water loop does not require
production (the pump will be set to its minimum speed).

8.10 - Condenser water valve (option 152)

Saturated condensing temperature control is assured if the three­way valve option is selected. The saturated condensing

temperature is  controlled  based on a  xed  setpoint that can be 
congured by  the user via  the SETPOINT table. The three-way 
valve control can be congured by the service department via the

SERVICE table.

8.11 - Unit short cycling protection

The Touch Pilot control constantly monitors the control point which
determines the operation of compressor(s). Compressors are
turned on and off in order to maintain the required control point
and satisfy the current cooling/heating demand.

The control provides a protection that prevents the premature

starting  of  compressors. The  service-congured  temperature 

threshold (acting upon the control point) is used for compressor(s)
control.

This unit short cycling option can be enabled via the touch screen
by setting the “short cycle management” parameter in the General

Conguration menu (GEN_CONF) to “yes”.

8.12 - Refrigerant leak detection (option 159)

This option permits refrigerant leak detection. Two sensors (not
supplied) that detect the refrigerant concentration in the air must
be installed on the unit.

If one of the two sensors detects an abnormal refrigerant level for
more than one hour, an alarm is triggered (10050), without shutting
the unit down. The refrigerant level and the time before triggering

an alert are congurable. To modify them, contact Manufacturer 

Service Agency.

8.13 - Night mode

Night  mode  allows users  to  congure  the  unit to  operate  with 
specic  parameters  in  a  specic  time  period.  During  the  night

period, the unit capacity is limited and the number of operating
fans is reduced.

The night period is dened by a start time and an end time that 

are the same for each day of the week. The Night mode settings

or the maximum capacity value can be congured in the General 
Conguration menu (GEN_CONF).

During the night period the condensing point is increased to limit
the number of fans operating (units with dry cooler condensing
control option).

To set night mode settings

1.  Navigate to the Conguration menu.

2. Select General Conguration (GEN_CONF).

3. Set night mode parameters.

Night Mode Start Hour [nh_start], Night Mode End Hour [nh_end]

00:00

Night Capacity Limit [nh_limit]

0 to 100% 100%

28

8 - STANDARD CONTROL OPERATIONS AND OPTIONS

8.14 - BACnet (option 149)

The BACnet/IP communication protocol is used by the building
management system or the programmable controllers to
communicate with the Touch Pilot interface. It is activated if the
optional BACnet activation key (dongle) is present on the electronic
control board.

This option may be ordered and installed on site. The BACnet

prole of the Touch Pilot interface is B-ASC. 

For more information about BACnet, please refer to the BACnet 

document included with the control or contact Manufacturer
Service Agency.

8.15 - Dry cooler (option 154)

19PV units have been specially designed to optimise the operation
of split installations, using air-cooled condensers as the chiller heat
rejection system.

19PV units can control a Carrier dry cooler to cool down the
condenser water loop. This air exchanger includes all compatible
control electronics.

8.15.1 - Condensing pressure control

The  control  conguration  of  this  functionality  must  be  done  by 

a specially trained and qualified engineer during the unit

installation. The Manufacturer supplies specic documentation for 

this operation to the trained engineers.

The Touch Pilot control system includes logic to permit the control

of different xed and variable-speed fan variants. 

Touch Pilot continuously optimizes system operation to obtain the

best system efciency by controlling the number of fans required 

for any thermal load and outside temperature conditions.

8.15.2 - Condensing setpoint

The condensing setpoint is adjustable in the Setpoint menu
(SETPOINT).

Condensing setpoint

Minimum value 27°C

Default value 35°C

Maximum value 49°C

The condensing setpoint can be reset by reference to the outside
temperature to optimize the operation of the condensing system.

To set the condensing setpoint reset, the following adjustments
are necessary:

- hr_sel (Heating Reset Select) set to “1” (OAT) in the Reset

Conguration menu (RESETCFG).

- oat_crno (OAT no reset value), oat_crfu (OAT full reset value)
and hr_deg (heating reset degree value) must be set in the

Reset Conguration menu  (RESETCFG). See also section 

8.4.2 for more information about reset control.

8.16 - Dry cooler free cooling (option 313)

19PV units may come with the free cooling option that enables
the control of a Carrier dry cooler. The chiller and the dry cooler
have to be connected through a LEN RS-485.

Units tted with a dry cooler provide the “free cooling” functionality 

which means that the chilled water system directly exchanges
heat using the air-to-water heat exchanger (“dry cooler”).

For chillers with this option, the Touch Pilot control may use low 

outside air temperature to cool down the water loop and satisfy
the cooling demand.

The dry cooler is used not only to assist in producing cooling water
to meet the current cooling demand but it also allows for reducing
energy consumption.

The dry cooler comes with up to 20 fans, i.e. xed-speed or variable­speed fans, which can be installed in different congurations. The 

Touch Pilot control distinguishes between two types of fan control

for a dry cooler free cooling option, where the rst one embraces 

the use of fan staging and the second one includes the use of

variable-speed fans. Mixed conguration can also be used (xed 

and variable-speed fan control at the same time).

8.17 - Master/Slave control

The control system allows for master/slave control of two units
linked by the network. The master unit can be controlled locally,
remotely or by network commands, while the slave unit remains
in Network mode.

All control commands to the master/slave assembly (start/stop,
setpoint selection, heating/cooling control, load shedding, etc.)
are handled by the unit which is configured as the master.
The commands are transmitted automatically to the slave unit.

If the master chiller is turned off, while the master/slave function
is active, then the slave chiller will be stopped. Under certain

circumstances, the slave unit may be started rst to ensure that 

the run times of the two units are equalised.

In the event of a communication failure between the two units,
each unit will return to an autonomous operating mode until
the fault is cleared. If the master unit is stopped due to an alarm,
the slave unit is authorised to start.

IMPORTANT: Master/slave assembly can be congured only

by service technicians.

29

9 - DIAGNOSTICS

9.1 - Control diagnostics

Touch Pilot control system has many fault tracing aid functions,
protecting the unit against risks that could result in the failure of
the unit.

The user interface enables the quick display of the unit status:

- The blinking bell icon indicates that there is an alarm, but the
unit is still running.

- The highlighted bell icon indicates that the unit is shut down
due to a detected fault.

The local interface – Touch Pilot – gives the user quick access to
monitor all unit operating conditions. If an operating fault is
detected, the alarm is triggered.

All information regarding the existing alarms (current and past
alarms) can be found in the Alarms menu.

• Press the Alarm button to access the Alarms menu.

9.4 - Resetting alarms

The alarm can be reset either automatically by the control or
manually through the touch panel display or the web interface
(in the Reset Alarms menu).

■ The Reset alarms menu displays up to 5 alarm codes which
are currently active on the unit.

■ Alarms can be reset without stopping the machine.

■ Only logged-in users can reset the alarms on the unit.

To reset the alarm manually

1. Press the Alarm button in the upper-right part of the screen.

2. Select Reset Alarms.

3.  Set “Alarm Reset” to Yes.

4. Press  to conrm alarm reset.

Alarms menu Access

Current

Alarms

Alarm

Historic

Reset

Alarms

Basic + + +

Basic + + +

User +

Viewing alarm information

Date Hour Code Description

9.2 - Current alarms

The Current alarms menu may display up to 10 current alarms.

To access the list of currently active alarms

1. Press the Alarm button in the upper-right part of the screen.

2. Select Current Alarms.

3. The list of active alarms will be displayed.

9.3 - Alarms history

The Alarm Historic menu may display up to 50 alarms that occurred
on the unit.

To access the alarm history

1. Press the Alarm button in the upper-right part of the screen.

2. Select Alarm Historic.

3. The history of alarms will be displayed.

IMPORTANT: Not all alarms can be reset by the user. Some
alarms are reset automatically when operating conditions
return to normal.

CAUTION: In the event of a power supply interrupt, the unit
restarts automatically without the need for an external
command. However, any faults active when the supply is
interrupted are saved and may in certain cases prevent
a circuit or a unit from restarting.

9.5 - E-mail notications

The  control  system provides  the  option  to  dene  one  or  two 
recipients who receive e-mail notications each time the new alarm

occurs or all existing alarms have been reset.

IMPORTANT: E-mail notications can be set only by service

technicians.

30

9 - DIAGNOSTICS

9.6 - Alarms description

The following table includes all alarms/alerts associated with the
operation of the unit.

Code Description Possible cause Action taken Reset type

Thermistor failure
15001 Cooler Entering Fluid Thermistor  Defective thermistor Unit shuts down Automatic, if thermistor

15002 Cooler Leaving Fluid Thermistor  As above Unit shuts down As above
15006 Condenser Entering Fluid Thermistor  As above Unit shuts down As above
15007 Condenser Leaving Fluid Thermistor  As above Unit shuts down As above
15011 MASTER/Slave Common Fluid Thermistor  As above Master/Slave assembly

15032 MASTER/Slave Common Heat Fluid 

Thermistor

15018 Circuit A Condenser Subcooling Liquid

Thermistor Failure 

15019 Circuit B Condenser Subcooling Liquid

Thermistor Failure 

15021 Space Temperature Thermistor Defective thermistor while reset

15010 OAT Thermistor Failure  Defective thermistor No action (warning only) As above
15046 Free Cooling Water Loop Thermistor Failure  As above Free cooling is disabled, but

15047 Free Cooling Leaving Water Thermistor 

Failure 

15048 Free Cooling OAT Sensor Failure  As above As above As above
15036 External Air Cond. Control: Leaving Water

Thermistor Failure

15099 External Air Cond. Control: Outdoor Air

Thermistor Failure

Pressure transducer failure
12001 Circuit A Discharge Transducer Failure  Defective transducer or

12002 Circuit B Discharge Transducer Failure  As above Circuit B shuts down As above
12004 Circuit A Suction Transducer Failure  As above Circuit A shuts down As above

12005 Circuit B Suction Transducer Failure  As above Circuit B shuts down As above
12031 Circuit A Condenser Subcooling is negative Defective transducer or

12032 Circuit B Condenser Subcooling is negative As above No action (warning only) As above
Communication failure
4901 Loss of communication with SIOB Board

Number 1

4902 Loss of communication with SIOB Board

Number 2

4903 Loss of communication with SIOB Board

Number 3

4601 Loss of communication with AUX1 Board

Number 1

4602 Loss of communication with AUX1

FreeCooling board

4611 Loss of communication with AUX1 Air

Condensing Control board

Unit protections
10001 Cooler Freeze Protection No water ow, defective

10002 Circuit A Condenser Freeze Protection Discharge pressure transducer

10003 Circuit B Condenser Freeze Protection As above Unit is "On": Circuit B shuts

As above As above As above

As above Circuit A shuts down As above

As above Circuit B shuts down As above

by “Space temp.” is activated

As above As above As above

As above Unit shuts down As above

As above Unit shuts down As above

installation fault

installation fault, calculated
condenser subcooling is
negative

Bus installation fault or
defective board

As above Circuit B shuts down As above

As above Unit shuts down As above

As above Unit continues to operate, but

As above Free cooling is disabled As above

As above Unit shuts down As above

thermistor

defective, refrigerant leak or
low condenser water
temperature

control disabled. Unit returns
to the standalone mode

No action (warning only) As above

the unit continues to operate

Circuit A shuts down Automatic, if sensor voltage

No action (warning only) As above

Unit shuts down Automatic, if communication

options related to the board
are disabled, e.g. leak
detection, master/slave
assembly control

Unit shuts down Automatic, if water exchanger

Unit is "On": Circuit A
shuts down, but the
condenser pump is turned on
Unit is “Off”: Condenser
pump is turned on, but the
unit cannot be started

down, but the condenser
pump is turned on
Unit is “Off”: Condenser
pump is turned on, but the
unit cannot be started

reading returns to normal

As above

As above

reading returns to normal

is re-established

As above

LWT is 3 K above the

setpoint, (the rst alarm within 
24 hours); otherwise, Manual

Automatic, if saturated
discharge temperature is

more than 4.4°C; otherwise, 

Manual

As above

31

9 - DIAGNOSTICS

Code Description Possible cause Action taken Reset type

10005 Circuit A Low Suction Temperature Pressure sensor defective,

10006 Circuit B Low Suction Temperature As above Circuit B shuts down As above
10105 Maximum condensing Leaving water temp Leaving water temperature is

10014 Customer Interlock Failure Customer interlock is open Unit shuts down Automatic, if customer

10090 Cooler Flow Switch Setpoint Conguration 

Failure

10091 Cooler Flow Switch Failure Flow switch fails to close within 

10015 Condenser Flow Switch Failure Flow switch is open Unit shuts down Automatic, if ow switch is 

10028 Electrical Box Thermostat Failure Electrical box thermostat input

10030 Master/Slave communication Failure Connection lost with slave unit Units are returning to

10031 Unit is in Network emergency stop Network emergency stop

10032 Cooler pump #1 fault Flow switch or water pump fault Unit shuts down Manual
10050 Refrigerant Leakage Detection Refrigerant escape No action (warning only) Automatic, if voltage reading

10073 Condenser pump #1 fault Water pump fault Unit shuts down Manual
10097 Cooler water exchanger Temperature

Sensors Swapped

10102 Condenser water exchanger Temperature

Sensors Swapped

10098 Discharge pressure sensors swap Pressure sensors swapped Unit shuts down Manual
10099 Suction pressure sensors swap Pressure sensors swapped Unit shuts down Manual
10063 Circuit A Internal safety chain open (HP,

Doors, Power)

10064 Circuit B Internal safety chain open (HP,

Doors, Power)

10101 Free Cooling Process Failure Dry cooler fault Free Cooling continued to 

10216 Wrong wiring main switch A Contactor is closed, but high

10217 Wrong wiring main switch B As above Circuit B shuts down Manual
10218 Electrical fault A Contactor is open, but it is

10219 Electrical fault B As above Circuit B shuts down Manual

Conguration failure

8000 No factory conguration Initial factory conguration 

7001 Illegal factory conguration Number #1 to nn  Incorrect unit conguration or 

9001 Master chiller conguration error Number #1 

to nn

Service Maintenance
13001 Service maintenance alert Number # nn Servicing action required No action (warning only) Manual
13005 Fgas check needed, call your maintenance

company

EXV blocked or lack of
refrigerant

above the congured threshold

Defective ow controller or 

wiring error

the off to on delay

Flow switch is open Unit shuts down Manual

is open

command

Water temperature sensors
swapped

Water temperature sensors
swapped

One of the high pressure
switches is open, electrical
wiring issue, door is open,
circuit breaker is open, pressure
is higher than HP safety

(service valve closed or re)

One of the high pressure
switches is open, electrical
wiring issue, door is open,
circuit breaker is open, pressure
is higher than HP safety

(service valve closed or re)

pressure switch is opened

commanded to be closed; 
wiring issue, short circuit; visual

check of the electrical cabinet
internal state is mandatory

required

new version of compressor FW 

not supported
Incorrect master/slave

conguration

Maintenance date passed No action (warning only) Manual

Circuit A shuts down Automatic (the rst alarm 

Unit shuts down Automatic, if conditions

Unit is not allowed to start Manual

Cooler pump is stopped Automatic (the rst alarm 

Unit shuts down (in order to
limit heat in the control box)

standalone mode
Unit shuts down Automatic, if emergency

Unit shuts down Manual

Unit shuts down Manual

Unit shuts down Manual, HP switch must be

Unit shuts down Manual, HP switch must be

work partially, and
compressor stages are
allowed to start

Circuit A shuts down Manual

Circuit A shuts down Manual

Unit cannot be started Automatic, if conguration is 

Unit cannot be started Automatic, if conguration is 

Master/Slave assembly
control is disabled and the
unit can operate in
standalone mode

within 24 hours); otherwise, 

Manual

return to normal

interlock is closed (the rst 
alarm within 24 hours);

otherwise, Manual

within 24 hours); otherwise, 

Manual

closed (the rst alarm within 
24 hours); otherwise,

Manual

Automatic (the rst alarm 
within 24 hours); otherwise,

Manual
Automatic when

communication is recovered

stop is deactivated

returns to normal

reset manually as well

reset manually as well

Automatic, if operating
conditions return to normal

provided

corrected

Automatic, if conguration is 

corrected or the unit is not in
Master operating type

32

9 - DIAGNOSTICS

Code Description Possible cause Action taken Reset type

Compressor failure XX = 11 (compressor A1); XX = 12 (compressor A2); XX = 21 (compressor B1); XX = 22 (compressor B2)
xx20 Compressor High Inverter Temperature Compressor fault Compressor shuts down Automatic
xx22 Compressor Low Suction Pressure As above Compressor shuts down Automatic
xx23 Compressor High Discharge Pressure As above Compressor shuts down Automatic
xx24 Compressor 3-Phase Overcurrent As above Compressor shuts down Automatic
xx25 Compressor Cavity Temperature As above Compressor shuts down Automatic
xx27 Compressor Pressure Ratio As above Compressor shuts down Automatic
xx28 Compressor Bearing/Motor Controller Fault  As above Compressor shuts down Automatic
xx29 Compressor Sensor Fault  As above Compressor shuts down Automatic
xx30 Compressor SCR Temperature As above Compressor shuts down Automatic
xx31 Compressor Lock Out As above Compressor shuts down Automatic
xx32 Compressor Motor Winding Temperature As above Compressor shuts down Automatic
xx33 Compressor High Suction Superheat As above Compressor shuts down Automatic
xx34 Compressor Earth Leakage As above Compressor shuts down Automatic
xx35 Compressor Soft Start Temp. As above Compressor shuts down Automatic
xx36 Compressor Identication register does not

match

xx37 Compressor Starting is taking too much time As above Compressor shuts down Automatic, if the compressor

xx38 Compressor - Interlock discordance As above Compressor shuts down Manual
xx39 Compressor - Out of map info As above No action (warning only) Automatic
xx90 Compressor Communication lost As above Compressor shuts down Automatic, if communication

LEN & Database modules failure
56001 Lenscan module Failure Software problem. Contact

55001 Database module Failure As above No action (warning only) Manual
Voltage failure
57001 SIOB 1 Low Voltage Failure Unstable electrical supply or

57002 SIOB 2 Low Voltage Failure As above Circuit B shuts down As above
57003 SIOB 3 Low Voltage Failure As above Unit shuts down As above
Stepper motor failure
57020 Main EXV Stepper Motor Failure - Cir A Stepper motor failure Circuit A shuts down Manual
57021 Main EXV Stepper Motor Failure - Cir B As above Circuit B shuts down Manual
57030 Staging Valve stepper motor failure -

Compressor A1

57031 Staging Valve stepper motor failure -

Compressor A2

57040 Staging Valve stepper motor failure -

Compressor B1

57041 Staging Valve stepper motor failure -

Compressor B2

As above Compressor shuts down Manual

is stopped

is re-established

Manufacturer Agency

electrical issue

As above Compressor A1 cannot be

As above Compressor A2 cannot be

As above Compressor B1 cannot be

As above Compressor B2 cannot be

Unit shuts down Automatic

Unit shuts down Automatic, if voltage reading

returns to normal (6 alarms

within 24 hours); otherwise, 

Manual

Manual

started

Manual

started

Manual

started

Manual

started

33

10 - MAINTENANCE

In order to ensure the optimal operation of the equipment as well
as the optimization of all the available functionalities, it is
recommended to activate a Maintenance Contract with your local
Manufacturer Service Agency.

The contract will ensure your equipment is regularly inspected by
specialists so that any malfunction is detected and corrected
quickly and no serious damage can occur to your equipment.

The Manufacturer provides a wide range of service contracts which

embrace  the  assistance of  highly  qualied  HVAC engineering 

professionals ready to help if needed. The Maintenance contracts
represent not only the best way to ensure the maximum operating

life of your equipment, but also, through the expertise of qualied 

personnel, the optimal tool to manage your system in a cost­effective manner.

To find the best type of contract that will meet all of your
expectations, please contact your local Manufacturer
representatives.

34

Order No.: 10267,03.2018. Supersedes order No.: New. Manufactured by: Carrier SCS, Montluel, France.

Manufacturer reserves the right to change any product specications without notice. Printed in the European Union.