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Operation and Maintenance Manual

Aquaflair™ Modulating Air-cooled Chillers, Free-cooling Chillers and Heat Pumps

Uniflair™ ISAC, ISAF, ISAH, ISCC, ISCF, ISCH

Models 0621A, 0921A, 1221A

990-9874-001

06MC0104@00B0120

Publication Date: April 2016

Schneider Electric IT Corporation Legal DisclaimerThe information presented in this manual is not warranted by the Schneider Electric IT Corporation to be authoritative, error free, or complete. This publication is not meant to be a substitute for a detailed operational and site specific development plan. Therefore, Schneider Electric IT Corporation assumes no liability for damages, violations of codes, improper installation, system failures, or any other problems that could arise based on the use of this Publication.

The information contained in this Publication is provided as is and has been prepared solely for the purpose of evaluating data center design and construction. This Publication has been compiled in good faith by Schneider Electric IT Corporation. However, no representation is made or warranty given, either express or implied, as to the completeness or accuracy of the information this Publication contains.

IN NO EVENT SHALL SCHNEIDER ELECTRIC IT CORPORATION, OR ANY PARENT, AFFILIATE OR SUBSIDIARY COMPANY OF SCHNEIDER ELECTRIC IT CORPORATION OR THEIR RESPECTIVE OFFICERS, DIRECTORS, OR EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL, OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, CONTRACT, REVENUE, DATA, INFORMATION, OR BUSINESS INTERRUPTION) RESULTING FROM, ARISING OUT, OR IN CONNECTION WITH THE USE OF, OR INABILITY TO USE THIS PUBLICATION OR THE CONTENT, EVEN IF SCHNEIDER ELECTRIC IT CORPORATION HAS BEEN EXPRESSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SCHNEIDER ELECTRIC IT CORPORATION RESERVES THE RIGHT TO MAKE CHANGES OR UPDATES WITH RESPECT TO OR IN THE CONTENT OF THE PUBLICATION OR THE FORMAT THEREOF AT ANY TIME WITHOUT NOTICE.

Copyright, intellectual, and all other proprietary rights in the content (including but not limited to software, audio, video, text, and photographs) rests with Schneider Electric IT Corporation or its licensors. All rights in the content not expressly granted herein are reserved. No rights of any kind are licensed or assigned or shall otherwise pass to persons accessing this information.

This Publication shall not be for resale in whole or in part.

Table of Contents

Safety.................................................................................1

Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Safety During Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

General Information...........................................................4

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Cross-reference symbol used in this manual . . . . . . . . . . . . . . .4Manual updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Symbols on the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Commissioning ..................................................................6

Check Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Initial inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Free-cooling version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Heating the oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Operation...........................................................................8

Microprocessor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Display Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Language selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Program identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Display information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Pre-operation symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Operation symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Unit Start-up Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Turning the Unit On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Automatic mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Turning off the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Adjusting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Uniflair ISA*, ISC* Operation and Maintenance Manual i

Unit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Unit on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Setpoint remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Alarms history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Software information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13pLan network status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Settings Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Operative settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Set-back cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Hour meter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Manual defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Summer and Winter Commutation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16From the user terminal keyboard . . . . . . . . . . . . . . . . . . . . . . 16From digital input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16From BMS supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Heat Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Clock and Calendar Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Modbus Communication Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Hardware settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Ultracapacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Software settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Sensor calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Memory operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Manual control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Serial communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Alarm addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Network Configuration .....................................................39

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

pLAN address settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Configuring the pLAN address . . . . . . . . . . . . . . . . . . . . . . . . 40Terminal and pCO addresses . . . . . . . . . . . . . . . . . . . . . . . . . 44

pLAN Connections Between the Units. . . . . . . . . . . . . . . . . . . . . . . . . 45

Remote Control of the Terminal with pLAN . . . . . . . . . . . . . . . . . . . . . 46

LAN and Supervision Connection Cable . . . . . . . . . . . . . . . . . . . . . . . 50

Viewing the Network from the Terminal . . . . . . . . . . . . . . . . . . . . . . . . 50

ii Uniflair ISA*, ISC* Operation and Maintenance Manual

LAN Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

EXV Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Parameter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Alarm Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Triggered alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54Alarm descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Default Value Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Configuration parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62Numeric parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Technical Data.................................................................70

Refrigerant Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Water Circuit Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Recommended plant capacity . . . . . . . . . . . . . . . . . . . . . . . . . .70

Maximum Operating Hydraulic Pressure . . . . . . . . . . . . . . . . . . . . . . . 71

Compressor Oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Safety Device Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Troubleshooting...............................................................72

Default Values Update and Protocol Variables................75

Maintenance ....................................................................76

Safety During Maintenance Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Creating a vacuum in the circuit . . . . . . . . . . . . . . . . . . . . . . . .76Filling with refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Check the Compressor Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Double Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Low External Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Units with free-cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79Units without free-cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Scheduled Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

iiiUniflair ISA*, ISC* Operation and Maintenance Manual

Quarterly Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Semi-annual Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Annual Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Other Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

iv Uniflair ISA*, ISC* Operation and Maintenance Manual

Safety

Important Safety InformationRead the instructions carefully to become familiar with the equipment before trying to install, operate, service, or maintain it. The following special messages may appear throughout this manual or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

The addition of this symbol to a Danger or Warning safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a potentially hazardous situation which, if not avoided, can result in death or serious injury.

CAUTION

CAUTION indicates a potentially hazardous situation which, if not avoided, can result in minor or moderate injury.

NOTICE

NOTICE addresses practices not related to physical injury including certain environmental hazards, potential damage or loss of data.

1Uniflair ISA*, ISC* Operation and Maintenance Manual

Safety During OperationRead and adhere to the following important safety considerations when working with this unit.

DANGERHAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462.

• This equipment must be installed and serviced by qualified personnel only.

• Turn off all power supplying this equipment before working on or inside the equipment.

• Always use a properly rated voltage sensing device to confirm power is off.

• Replace all devices, doors, and covers before turning on power to this equipment.

Failure to follow these instructions will result in death or serious injury.

DANGERHAZARD TO PERSONNEL

Water and other conducting substances must not be used in the event of a fire to put out flames near electrical components. This warning must be displayed in the installation location.

If the refrigerants used come into contact with fire, they decompose and produce acids and other irritating substances. The smell of these substances, even in the presence of concentrations below dangerous levels, should be enough warning to allow the area at risk to be evacuated.


DANGERHAZARD TO PERSONNEL

This unit contains pressurized refrigerant gas and chilled water circuits, live electrical components, hot surfaces, sharp edges (the fins on the batteries), and rotating devices, such as fans.

All support and maintenance activities requiring access to the interior of the unit must be performed by qualified personnel who are aware of all safety precautions to be taken.


WARNINGHAZARD FROM MOVING PARTS

Keep hands, clothing, and jewelry away from moving parts. Check the equipment for foreign objects before closing the doors and starting the equipment.

Failure to follow these instructions can result in death, serious injury, or

equipment damage.

Uniflair ISA*, ISC* Operation and Maintenance Manual2

CAUTIONDAMAGE TO EQUIPMENT OR PERSONNEL

The equipment is heavy and can easily be tipped. For safety purposes, adequate personnel must be present when moving this equipment.

Failure to follow these instructions can result in injury or equipment damage.

CAUTIONHAZARD TO EQUIPMENT OR PERSONNEL

All work must be performed by Schneider Electric qualified personnel.



General Information

Overview

Cross-reference symbol used in this manual

See another section of this document or another document for more information on this subject.

Manual updates

Check for updates to this manual on the Schneider Electric Web site, www.schneider-electric.com/support. Select the Download Documents and Software link under the Support tab and enter the manual part number or SKU for your equipment in the search field. See the back cover of this manual for the part number.

Compliance

This unit underwent the risk analysis in compliance with Machinery Directive 2006/42/EC. The technical solutions implemented during the design phase are described in the unit's technical documentation. The appliance was built to operate safely in the areas of application for which it was designed, provided its installation, commissioning and maintenance are performed in compliance with the instructions provided in this manual and on the labels affixed to the unit.

In compliance with European Community Directive 94/9/EC, these units must not be used in potentially explosive atmospheres. In any case, always abide strictly by the applicable laws in force in the place of installation of the system.

Pressurised equipment: This appliance is subject to European Community Directive 97/23/EC concerning Pressurised Equipment. Any and all work performed on the pressure circuit must be expressly authorised by Schneider Electric and personnel must be approved by Schneider Electric. If any one of the following components: compressors, liquid tanks, safety valves, cooling pressure switches needs to be replaced, immediate notification of the serial number of the new device and of the replaced device must be sent to Schneider Electric, otherwise Schneider Electric will not guarantee the entire appliance.

What's more, should it be necessary to replace any welded joint on site, Schneider Electric must be notified immediately of which joint needs repairing and the name of the technician performing the repair work must be notified.


http://www.schneider-electric.com/support

Symbols on the Unit

Symbol Meaning Symbol Meaning

Danger Moving Parts

Important

Warning

Hot Surfaces - Risk of Burns

High Voltage - Risk of Electric Shock Sharp Surfaces

Water Inlet Pipe Water Outlet Pipe


Commissioning

Check Lists

Initial inspection

After installation, complete the following checklists to verify that all components are properly installed, the location of the chiller has been properly prepared, and the chiller is free of damage.

Once installation is complete, perform the following checks:

Free-cooling version

For transportation purposes, the free-cooling circuit taps have been closed and sealed. Remove the seals and open the taps before filling the hydraulic circuit.

Ensure that

All connections on the electrical terminal are tightened.

Voltage to the electrical mains is correct.

Power supply phases are connected correctly.

Gas circuit pressures (pressure gauge) are within the correct parameters.

The percent glycol in the hydraulic circuit is correct.

The electrical panel on the IG switch is closed, making sure first that the power supply phases have been connected correctly.

na58

57a

FREE-COOLING CIRCUIT TAPS


Start-up

Heating the oil

After powering the chiller (IG set to ON, IM9 closed, and unit turned off from control), wait at least 12 hours before the season start-up of the system in order to heat up the compressor oil sufficiently.

Do not disconnect the unit from the power supply for weekly stops.

During prolonged stops, the refrigerant may migrate spontaneously into the compressor casings, which on start-up may cause the oil to foam and damage due to lack of lubrication.

NOTICEHAZARD TO EQUIPMENT

Before starting the unit, read “Semi-hermetic screw compressor start-up procedure” on page 7.

Failure to follow these instructions can result in equipment damage.


Operation

Microprocessor Control

General features

The microprocessor control manages unit operation. The controller consists of the following components:

• microprocessor control card, housed in the switchboard

• graphic user interface

The regulation program is housed in the control card where all operating parameters, which can be viewed and set via the user interface, are saved.

The control system provides the following functions:

• delivery water temperature control based on a settable setpoint

• option of setting a double setpoint (for cooling)

• option of calculating the setpoint based on external temperature compensation

• complete alarm detection system with visual and audible indicators, and messages regarding measures to be taken

• alarm event log

• alarm warning contacts divided by type

• programmable automatic restart when power is restored

• remote unit on/off switching

• control of all compressor operating time settings, pump-down mode management, and compressor operation rotation to ensure their efficiency, and reliability

• three types of condensation regulation: modulating, step, and super silent step

• suction pump management

• antifreeze heater management

• management of the unit operating as heat pump

• defrost management

• password on two programming levels (settings, hardware, and software configuration)

• possibility of communicating with a supervision system via the following communication protocols: NETvisor, Modbus, BACnet, LON, Metasys, SNMP (TCP/IP), and Trend

• clock/calendar management

• operating hour counter for most significant components

• compressor start counter

• operating status display for all unit components and display of all values read by the probes connected to the control card

• differentiated weekly on/off time bands: Weekdays - Saturdays - Holidays

• local network management with the possibility of setting unit rotation in stand-by and the operation of this unit in set-back mode, regulation based on the average temperatures, and regulation steps

• override function via which main component operations can be manually controlled without disabling remote control

• optimized control algorithm that constantly measures external temperature to manage free cooling in the best way possible


Display InterfaceThe display interface consists of the following:

• one back-lit 132 x 64 pixel LCD display with buzzer

• six back-lit buttons to move between and change parameters

The microprocessor board is connected to the user interface by a 6-conductor telephone cable with an RJ11 port connector.

Language selection

The following languages are available:

• EN = English

• DE = German

• IT = Italian

• FR = French

• SP = Spanish

To select a different language at any time, press PRG and then ENTER.

NOTE: Screens that are reserved for use by service personnel (such as the Service Menu) will always appear in English.

The initials of the current language will appear in the bottom right corner of the screen.

To display this screen, press PRG and select Language Menu.

Item Description Function

LCD Display Flat, electronic visual display

ALARM button Views and resets alarms (flashes red when an alarm is activated)

PRG button Enters the Configuration menu

ESC button Exits the screen

UP button Moves up the menu

ENTER button Confirms

DOWN button Moves down the menu

na36

36a

Initiating...Please wait

Esc


Program identification

This menu describes the standard control characteristics for chillers. Some of the special version characteristics may differ from those described herein.

Display information

The display interface normally displays a screen (hereinafter referred to as “main screen”) that provides essential information on system status.

• Field A displays the time and date (if entered in the clock card) and the unit number in the LAN.

• Field B displays the room temperature and humidity (if the probe is installed).

• Field C displays information on machine status.

Pre-operation symbols

When the unit is not in operation, the following symbols display:

• Press ENTER to turn on

• Turned off by remote contact

• Turned off by supervision system

• Turned off with timer

• Unit in automatic rotation cycle

• Setback mode

• Turned off by manual shutdown

• Turned off by no water flow alarm

• Turned off due to blackout

• Turned off due to blackout with Ultracapacitor running

Family Version Language Date

AQUASCREW 1.0 EN xxxxxxxxx

12:00 01/01/15 LAN 1

In 12.0ºCOut 9.7ºC

AB

C


Operation symbols

When the unit is in operation, the following symbols display:

• Evaporator water pump off

• Evaporator water pump on

• Pump alarm

• Cooling function on

• Compressor off

• Compressor on

• Compressor alarm

• Free-cooling on

• Unit switched on by external remote contact

• Unit switched on by BMS

• Unit switched on by time rotation cycle

• Unit switched on by time band

• Unit switched on by manual commands

• Unit forced on

• Unit on in set-back cycle

• Unit alarm

• Ultracapacitor module in load phase

Unit Start-up ConditionsThe following operations must be performed before unit start-up:

1. Make sure the display light is on (power control).

2. Make sure the red ALARM key light is off (no alarm triggered).

3. Make sure the unit is switched on after pressing the ENTER key or alternatively

– The unit is turned on via the remote digital input contact that must be in the closed contact position.

– The unit is switched on via the supervision system, if connected and set (if serial card is installed).

– The unit is switched on via the daily or weekly time bands.

Turning the Unit On and OffThe unit can be turned on in the following ways:

• Local mode: Using the keypad, press ENTER to turn on the unit; a moving bar will appear followed by the pump icon .

• Automatic mode:

– Remote on/off contact

– Supervision system (if serial card is installed)

– Time band system

– Automatic rotation cycle

NOTE: If the unit is programmed to Setback Mode, it will automatically switch on even when it exceeds the set humidity temperature limits .


Automatic mode

When in automatic mode, the unit can only be turned on by overriding it.

1. Go to the main screen and use UP or DOWN to turn on the unit. The symbol will appear.

2. Press ENTER.

3. Enter the password.

4. Press ENTER (the Override Switch On symbol will appear).

NOTE: The password is provided inside the envelope enclosed with this manual.

Turning off the unit

1. Go to the main screen and use UP or DOWN to turn on the unit. The symbol will appear.

2. Press ENTER.

3. Enter the password.

4. Press ENTER to confirm password.

Adjusting parameters

To modify set parameters and to configure a sub-routine (setpoint, differential):

1. Use UP or DOWN to select the screen that shows the parameter (a cursor flashes in the top-left corner).

2. Press ENTER to move the cursor to the parameter to be modified.

3. To select the parameter value, which can be numerical or Boolean (YES/NO) use UP or DOWN.NOTE: Numeric values can be varied within the set control limits.

4. Press ENTER.

5. To return to the previous screen, press ESC.

6. To modify parameters in other screens, press ESC until the cursor is at the start of the first line.

7. Press UP or DOWN to select the desired screen.

Unit ConfigurationThe Unit Configuration screen allows you to view operation information. Only information or data relative to the chosen configuration appears.

1. From the main screen, press UP or DOWN to scroll through the configuration options.

2. Select the desired option.

3. Press ENTER.

Unit on/off

The UNIT ON/OFF screen is used to turn the unit ON and OFF.

Based on the current status of the unit, a different icon is displayed indicating the operation to be performed.

In the event of forced activation/deactivation in the automatic mode (remote contact, supervisor, time bands), the settings password is required for confirmation.

Input/Output

The INPUT/OUTPUT screen is used to check the setpoint and the other calibration parameters for the correct operation of the unit. Because the parameters are read-only, the values cannot be changed.

To set the values and access the parameters in programming mode, enter the settings password.

All variables are factory preset so that the control functions correctly maintain the room temperature.


Setpoint remote

The SETPOINT REMOTE screen is used to check the percent offset sent from the OMI device on the unit with LAN 1 address.

• Signal From OMI x.x%: Signal transmitted by OMI to LAN 1 unit

• Offset xx.x°C: Offset in degrees centigrade, calculated based on the signal sent by OMI and MAX Offset parameter

• Watchdog: Signal that OMI sends to the LAN 1 unit only to check for serial communications

Alarms history

The ALARMS HISTORY screen displays the historical sequence of the alarms activated (the microprocessor stores the last 200 events in its memory).

All the alarms saved can be read in sequence by pressing UP or DOWN. The date and time are recorded for each alarm event.

Software information

The SOFTWARE INFORMATION screen displays the software version, BIOS, boot, and unit serial number.

This information is essential when adding a new unit to a group of connected units in the LAN (the controllers must have the same program version).

When contacting customer support, the version of the control program saved on the control board must be indicated exactly.

pLan network status

The pLAN NETWORK STATUS screen displays the pLan network status, indicating all terminals and pCO cards connected on the same network.


Settings MenuThe Settings Menu sets the unit operating and signal parameters. These include the following settings:

• Operational Settings

• Hour Meter Settings

• Clock

NOTE: This menu describes the functions of the program in general and, based on the configuration set, the fields and configuration screens may be enabled or disabled.

1. Press PRG.

2. Select Settings Menu.

3. Press ENTER.

4. Enter the calibration password by pressing UP or DOWN.

5. Press ENTER.

Operative settings

All variables are preset in the factory so control functions correctly maintain standard conditions in the room.

This screen displays the delivery water temperature setpoint the unit is using as a reference for regulation. The following row displays a message that indicates the origin of the setpoint if different from the factory standard:

• Optional Set Point: This indicates that the second setpoint is active due to the contact switch at digital input set as second setpoint.

• Watch SetP.: This indicates that the set-back cycle setpoint is active.

Cooling setpoint: This screen sets the standard cooling setpoint and any “optional second setpoint” enabled by external consent that can be either digital or via BMS.

Summer compensation: This screen sets cooling setpoint summer compensation according to outdoor temperature following a ramp where the coordinates of the two points P1 and P2 are indicated.

Winter compensation: This screen sets the heating setpoint winter compensation according to outdoor temperature.

SETTINGS MENU

Operational Settings

Hour meter Settings

Clock

1/3

Water Input Reg.

SetP. On C 07.0Mode:Set Point Standard

Summer Input Reg.

SetP. std ºC SetP. opt ºC

Max. hysteresis ºC1.6

-> 7.010.0

Summer Input Reg.

SetP.Sum.

P1 7.0ºCP2 7.0ºC

T.ext

Summer:NO

aa

32.0ºC18.0ºC

P1

P2

na57

79a

SETPOINT

T EXT

Set Point Compensation

SetP.Win.

P1 45.0ºCP2 45.0ºC

T.ext

Winter:NO

aa

-05.0ºC10.0ºC


Alarm thresholds: This screen sets alarm thresholds for water delivery temperature in summer.

Set-back cycle

The set-back cycle, enabled or disabled via keyboard, automatically restarts the stopped, but still powered, unit based on a setpoint for this operating mode. The set-back cycle checks environmental conditions, even when the system is off. Its operations are not influenced by signals coming from any remote control systems, which take priority. The unit starting due to a set-back cycle is not considered an alarm condition.

This screen sets set-back cycle operating mode start and the operating setpoint during the set-back cycle.

This screen sets water circulation pump operations during a set-back cycle for 120 seconds. If set to YES, the pump turns on cyclically based on the set time interval.

Hour meter settings

The Hour Meter Settings menu sets the maintenance intervals for the components of the unit, establishing a threshold for operation hours. When the device reaches this limit, the microprocessor signals the maintenance request, activating an alarm displaying the symbol “ ” on the Status screen.

The following components have maintenance interval monitoring:

• Compressors

• Water circulation pumps

• Free-cooling pumps

The following actions are available for each component:

• Read the accumulated number of hours of duty.

• Set operation thresholds; setting the threshold to 0 inhibits the “SERVICE” warning request.

• Read the number of starts.

• Reset the hour meter (RESET = OK), for example, after component service and/or replacement.

Settings can be edited within the permissible ranges.

Manual defrost

This screen, accessible on heat pump versions, allows manual defrosting.

Alarm thresholds

Water input T.Unload Temp. ºC 5.0Max. Temp. ºC 18.0

Set-back cycle NO

SetP.Summer ºCSetP.Winter ºC

Set-back cycle

00.0000.00

Input

Cyclical start

Min. interval No00

Pump (s120)

Compressor 1

Work hours

C.1C.2

Hour thresholdReset

0000

--

Number of starts

00

res. --res. --

Defrost Circ. 1 --Defrost Circ. 2 --Defrost Circ.1-2

NoNoNo

Manual defrost


Summer and Winter CommutationSummer/winter work season can be changed in the heat pump unit in the following ways:

• Automatic

• From the user terminal keyboard

• From digital input (see wiring diagram enclosed with the unit)

• From BMS supervision

Automatic

If the unit is the heat pump version, the summer/winter work season can be changed automatically based on outdoor temperature.

From this screen, you can set the winter temperature (on hot), summer temperature (on cold), and delay time for actual commutation.

From the user terminal keyboard

If the unit is the heat pump version, the summer/winter work season can be changed from the machine terminal keyboard. In this case, the machine must be turned off and the operator must wait until operations are fully completed.

1. From the main screen, press the DOWN key until the Mode screen appears.

2. To change operating modes, press ENTER, change using the UP or DOWN keys and confirm by pressing ENTER.

3. Turn the unit back on and the winter operating setpoint will automatically be used.

From digital input

If the unit is the heat pump version, the summer/winter work season can be changed using the dedicated digital input.

For digital input settings, open the Service Menu and select Hardware Settings. Scroll screens until the Remote Control screen is displayed and then enable E/I via Contact.

The screen will display “Summer/Winter commutation via remote control.”

See wiring diagram enclosed with the unit.

From BMS supervisor

If the unit is the heat pump version, the summer/winter work season can be changed by a BMS supervisory system.

The screen will display “Summer/Winter commutation via remote control.”

Auto E/I com.

On Ext. Temp.:NoOn Hot to:On Cold to: Commutation delaysin Hot inin Cold in

°C 00.°C 00.

min 000min 000

Mode:

SUMMERTo change

Enter

REMOTE CONTROL

I/O via ContactI/O via SerialE/I via Contact

NNN

Mode:

SUMMER(From Remote Control)See “Default Values Update and Protocol Variables” on page 75 for

more information.


Heat RecoveryBoth partial and total heat recovery is performed by plate exchangers installed in the compressor delivery and air condenser. The following diagram indicates the recovery circuit in the machine and the utility circuit.

For correct chiller operations, the recovery exchanger (R) should not be fed with water at too cold of a temperature (temperature under 30 °C).

We recommend installing a three-way valve (MV) as illustrated.

This screen sets the heat recovery operation setpoint. If the condensation temperature exceeds the setpoint, water heating is allowed for external utilities.

B Condensation coils

C Scroll compressors

V Expansion valve

E Evaporator

R Recovery

RL Liquid receiver

P Circulation pump

W Accumulation tank

MV Three-way valve

W

MV

P

R

C

B

E

V

RL

Heat recovery

SetPoint

Max. hysteresis

ºC 00.0

ºC 00.0


Clock and Calendar SettingsThe date, time, and weekday are shown on the status screen.

The clock settings correspond with the following:

• Start-up and shut-down of the unit according to timed program

• Alarm events recordings

The following items can be set from this screen:

• Time of day (hours, minutes)

• Date (day, month, year)

• Week day classification

This screen manages Daylight Saving Time. The following parameters must be set:

• Time change in minutes

• Daylight Saving Time start/end

Based on the Daylight Saving Time start and end parameters, the program adjusts the time minutes by the Trans.Time value.

Example: To move the time forward one hour on the last Sunday in March at 2 AM, set the following parameters:

• Trans.Time: = 60

• Start: Last Sunday

• in: March

• at (time): 0200

To move the time back one hour on the last Sunday in October at 3 AM, set the following parameters:

• End: Last Sunday

• in: October

• at (time): 0300

At the Daylight Saving Time end date/time, the program will restore Daylight Saving Time.

Time band: This screen programs days of the week to automatically start and stop the unit based on time bands. This screen allows you to program half hour intervals per day in which one of the three programmable time bands will be on or off. The program can also be copied from one day to another in the week.

The screen also allows you to

• select the day of the week.

• move to the time bands and change the set within the limits, moving half-hour windows.

• copy programming from one day to another.

Trans. TimeStart: ---in ---End: ---in ---

Hours/MinutesDD/MM/YYDay of the week

Clock/Date cal.

Clock

Unit on cycles

12:0001/01/13

Fri

000min

at --.00

at --.00

Daylight savings time: OFF

Trans. TimeStart: in March atEnd: in October at

Clock

060minLast Sunday

02.00Last Sunday

03.00

Daylight savings time:

MON copy to TUES: NO 00.00 + 00:3000-08: _ _ _ _ _ _ _ _

08-16:_ _ _ _ _ _ _ _ _

16-24:_ _ _ _ _ _ _ _ _

Enable:

SetPoint 1SetPoint 2

Unit on cycles

YES

7.010.0


Modbus Communication StatusThis screen, visible if logged in with the service password, displays the communication status of devices connected via MODBUS protocol to the pCO controller.

The following unit components are displayed:

• Energy analyzer

• Inverter water circulation pumps

This screen sets Modbus communication protocol settings for the connected devices.

Service MenuThe Service Menu sets devices and their operations in the unit. Please note that the manual provides a general description of program functions. Setting fields and screens will be enabled and disabled based on the configuration.

NOTE: Changes to these settings are to be performed by qualified personnel only.

IMPORTANT: Settings can only be edited with the unit turned off. If you attempt to edit them with the unit on, this screen will warn you to turn the unit off.

1. Press PRG.

2. Select Service Menu.

3. Press ENTER.

4. Enter the service password by pressing UP or DOWN.

5. Press ENTER.

Hardware settings

This screen sets the following:

• Type: Type of unit

– Standard Chiller

– Chiller+Energy Saving

– Heat Pump+Heat Recovery

– Heat Pump

– Chiller+Heat Recovery

– Low Temp.Chiller

MODBUS MASTERMODBUS MASTER Nº1

CountersTotal.Mess.:Total.Mess.:Counter Reset:

MODBUS MASTERMOD_MB_Protocol_MNGVersion:2.3 04/11/10Master 1Sublist number:Sublist trigger:General trigger:Polling time:

n 000n 000

--

NO

00

000ms

SERVICE MENU

Hardware Settings

Software Settings

Sensor Calibration

1/9

SERVICE MENU

Memory Operations

Manual Control

Serial Communication

4/9

SERVICE MENU

Alarm Address

Unit Interconn.

EXV Settings

7/9

UNIT CONFIGURATIONSeries: ***

Type:***Model:***

Low External Temp. N


• Model: Unit model

– ISA*

• 0621A

• 0921A

• 1221A

– ISC*

• 0621A

• 0921A

• 1221A

The number of compressors and the number of cooling circuits will be automatically set after selecting the model and size.

• Low External Temp.: Low outdoor temperature unit (on free-cooling models by default)

Water circulation pump management: This screen sets the number of water circulation pumps on the machine and whether or not an inverter is installed for capacity variation. When an inverter is installed, set the signal type, Modbus or 0/10Vdc, for control.

When the inverter pump is installed with modbus control, the following are the Modbus settings:

• Serial address 7, 2 Stop bit, parity none, baud rate 19200

Fan management: This screen sets the type of refrigerant gas in the cooling circuit, whether an electronic thermostat valve is installed and the model.

• Phase-Cut

• EC (Electronic commutation)

Refrigerant gas management: This screen sets the type of refrigerant gas in the cooling circuit, whether an electronic thermostat valve is installed, and the model.

Double/triple power management:

• Main:

– Single: Standard single power

– ATS: Double power with driven switch

– Dual Manual: Double power with manual switch

• Aux:

– Main: Main power

– Main & UltraCap: Main power + UltraCap

– External UPS: External UPS

– Internal UPS: Internal UPS

UNIT CONFIGURATION

Circulation Pumps: 2Variable Speed: Y

Control Type: Modbus

UNIT CONFIGURATION

Fans Type:EC

UNIT CONFIGURATION

Gas Type:R410AEXV valves:YCircuit 1 Type:Danfoss ETS 12.5 - 25BCircuit 2 Type:Danfoss ETS 12.5 0 25B

Power Supply

POWER CONNECTION/SMain:Single

Aux:Main

Power Supply

POWER CONNECTION/SMain:Single

Aux:Main


If the ATS driven switch is installed, the illustrated screen will be displayed. The driven switch is monitored by the Modbus with the following addresses:

• Serial address 21

• 2 stop bit, parity none

• Baud rate 19200

When the power line is switched, the corresponding icon is displayed .

Mains frequency management: This screen sets mains frequency, if this is different from the default frequency.

Energy analyzer management: This screen sets whether or not an energy analyzer is installed on the machine. You can check information provided by the analyzer in the card input/output status viewing menu.

• Power Meter:=S= PM3250

• Serial address 20

• 2 Stop bit, parity none

• Baud rate 19200

Enable free-cooling on unit in stand-by: This screen enables intelligent free-cooling management when the unit is in stand-by (only with several units hydraulically connected in a LAN).

Power Supply

POWER CONNECTIONS/SMain:ATS(IG Slave Address:21)

Aux:Main

SUPPLY FREQUENCY

Automatic Set.

50 Hz

12:00 01/01/15 LAN 01

T.Water OUTºC 7.0

UNIT CONFIGURATION

Energy Power Meter:Y

Type=S= PM3250(Slave Address:20)

FC on Stand-by Unit(Hydr.Connected)

Enabled

UNIT CONFIGURATION


For a unit with an intelligent free-cooling system, the reference icon appears for the unit in stand-by if activated.

The following figure illustrates an example where unit 1 is in stand-by and units 2 and 3 are running while

connected with an intelligent free-cooling solution. Should external temperatures activate free-cooling, the

control systems of the running units turn on the fans in the stand-by unit (1) and the free-cooling pumps (C) in

the running units (2 and 3). This way, water from the system is sent to all available free-cooling batteries.

NOTE: Free-cooling pump start is delayed by 90 seconds to allow the F-On valve to open.

Item Description

A Main machine pump

B Free-cooling coils

C Free-cooling pump

D Evaporator

E Check valve client side

F Driven free-cooling valve

G Driven valve (field supplied)

na58

56a

A

B

D D D

B B

CCC

E

A

E

A

EG

F

G

F

G

F

UNIT 1 STANDBY UNIT 2 ON UNIT 3 ON

OFF ON

ONOFFOFF

ON

FIELD SUPPLIED


Cut-off valve: This screen sets hydraulic circuit cut-off valve operations if applicable. When the system is turned ON, the control enables valve opening. Control Mode identifies how the fully open control is run (end stroke or timed) and the onboard hydraulic pump is subsequently activated. The water flow alarm is delayed when the valve is open (Alarm Delay).

Pump-Down management: This screen enables pump-down management and the relevant maximum time needed to run this operation.

Optional sensor management: This screen enables the available probes if installed on the unit. With an inverter pump, the water pressure sensor is always installed.

Reading range regulation: This screen sets the chiller circuit high and low pressure transducer reading range.

This screen sets the water pressure transducer reading range.

Remote control management: This screen sets the following remote unit control parameters:

• I/O via contact: Unit On/Off via dedicated digital input

• I/O via serial: Unit On/Off via BMS system

• E/I via contact: Summer/winter commutation via dedicated digital input, for heat pump versions only

UNIT CONFIGURATION

Isolating Valve

CtrlMode:YON Delay Time s

Y

60

PUMP DOWN CONFIG.

Enable

Max.Time:

N

sec 20

SENSOR OPTIONAL

Water PressureRemote Wat. T.SensRefr. Liquid Temp.Additional Temp.

Gas Leakage

NNNN

N

PRESSURE TRANSDUCERS

Range Begin kPaRange End kPa

03500

PRESSURE TRANSDUCERS

WaterRange Begin kPaRange End kPa

01000

REMOTE CONTROL

I/O via ContactI/O via SerialE/I via Contact

NNN

High Press.Sensor

See wiring diagram enclosed with the unit for more information.

See “Default Values Update and Protocol Variables” on page 75 for more information.


Buzzer activation time management: This screen sets the maximum buzzer activation time when an alarm is active.

Serial number management: This screen sets the unit serial number that is displayed on the INFO screen.

Ultracapacitor

The Ultracapacitor module is an optional electronic device that ensures temporary control power in the event of a blackout. The module is made up of two buffer UltraCap condensers, independently charged by the module.

When a blackout occurs, condensers release accumulated energy until depleted. When power returns, the condensers start to charge and, to have efficient power to ensure control at the next blackout, about four minutes of continuous charge are needed.

The Ultracapacitor is set in the Hardware Settings menu. These settings do not enable/disable the device and do not alter operations in any way. This device bases its operations on internal condensers, which power the main control card during a blackout, charging themselves when power returns.

An icon appears in the main screen to indicate the Ultracapacitor charge status where

• UCAP Charging...: Ultracapacitor charge incomplete (if displayed with powered unit)

• UCAP Charge Compl.: Ultracapacitor charge completed

• UCAP Running: Ultracapacitor running (if displayed with unit not powered)

For further details on operating status, access the Hour-meter Settings loop, with the following messages and run times:

• Power Supply Fail.: Mains power outage

• UCAP in charge: Ultracapacitor charging

• Full Charge: Charge completed

• UCAP on working: Ultracapacitor running

• Last Power Fail.: Last mains power outage

NOTE: Enabling this function requires all operating components be turned off and all alarms disabled.

ALARM BUZZER CONFIG.

Activat.Time min (0=never:99=ever)

00

URx 000000

SERIAL NUMBER

ULTRACAP

Full ChargeLast Power Fail. 000

12:00 01/01/15 LAN 1

In 12.0ºCOut 9.7ºC

12:00 01/01/15 LAN 1


Software settings

This menu is used to select the number of software languages stored on the controller. All languages are stored by default and the customer selects which language to use on the display. In the event that a software update is necessary, service personnel can select to upload only one language to the controller to speed up the process. In this case, the language to upload is selected on this screen and the Language option on the main screen is disabled.

Setpoint limits: This screen sets maximum and minimum setpoint limits in cooling and heating modes (for heat pump versions only).

This screen, accessible on ISAC/F models, displays PID parameters to control water temperature that effects inverter compressor frequency.

Fan settings: These screens set parameters for fan regulation based on pressure values read by the sensor.

• Ultra Quiet Mode: Enables low noise modulation (the % second ramp is displayed when Ultra Quiet mode is started).

• Min. Speed %: Sets the minimum fan speed percentage.

• Max. Speed %: Sets the maximum fan speed percentage.

• Max. Speed Ultra Quiet %: Sets the maximum fan speed percentage in silent cooling mode.

• Total FC Mode: Sets the maximum fan speed percentage when total free-cooling is on.

This screen sets fan speed according to the condensation temperature.

• DT. Ext-cond Min.: The condensation temperature setpoint will be given by the external temperature + 10°C (settable).

• Integral Time, Derivat. Time: PID parameters for the condensation temperature setpoint

• Time pulse start: Start time

Fan settings: Fan Speed Setting On/Off and Ramp begin./ending: define the on/or evaporation temperatures and ramp start/end for fan modulation.

SETPOINT LIMITS

Min ValueMax Value

0.00.0

Cooling Mode

Min ValueMax Value

0.00.0

Heating Mode

ºCºC

ºCºC

Fan Speed Setting

Ultra Quiet ModeMin.SpeedMax.Speed Cool.M.

Total FC ModeRegole.Tupe:PID

Fan Speed Setting (summer)

On: 25 CRamp begin.Ramp ending

Ultra Quiet(High RampRamp2 begin.Ramp2 begin.

Off: 20ºC28ºC45ºC

52ºC58ºC

Fan Speed Setting (summer)

DT.Ext-Cond Min.

Integral TimeDerivat. TimeTime Pulse Start

7.0ºC

100s0s

120s

%%

%

N15

100

100

Fan Speed Setting

Ultra Quiet ModeMin.SpeedMax.Speed Cool.M.Low Ramo Speed

Total FC ModeRegole.Tupe:PID

%%%

%

N15

10077

100

Compr.Inv. PID Sett.

Cooling

Prop. Band 40Integ.Time 30 sDerivat.Time 2 s

Fan Speed Reg.(Winter)

On:17ºCRamp begin.Ramp ending

OFF:18ºC16ºC12ºC


Free-cooling enable setpoint: In units with free-cooling, this screen sets the enabling DeltaT. When the external air temperature is lower than the unit feed water temperature by the indicated value, the unit enters free-cooling operating mode, starting the water circulation pump.

Total free-cooling is activated when the following conditions are met:

• The differences in temperature between unit input and output must be higher than DT WATER IN-OUT Total FC Mode. If the temperature difference is higher than indicated value, this means that unit cooling yield in free-cooling mode is greater than or equal to nominal yield.

• Input water temperature must be under a calculated value. If this condition is also met, it means that the water temperature is near setpoint.

To indicatively determine the calculated threshold, add: SetPoint + Hysteresis + DT WATER IN-OUT Total FC Mode.

Two modes can be distinguished

• Standard: The unit operates according to free-cooling with a setpoint shifted by half proportional band, starting and changing compressor start step profiles to increase air-water exchanger efficiency.

• Close Control: The unit operates according to free-cooling maintaining the fixed regulation setpoint.

Antifreeze: This screen sets the following parameters:

• The percent glycol introduced in the water circuit

• The setpoint to activate the antifreeze alarm (display warning only)

• The setpoint to stop running compressors

This screen sets water circulation pump start through the free-cooling batteries according to antifreeze temperature. If the function is enabled in the unit in stand-by, the free-cooling pump is started as soon as the external temperature drops under 1.0°C; it stops when it exceeds 3.0°C.

NOTE: Only an appropriate glycol mix ensures battery antifreeze if the external temperature significantly drops under zero: the indicated function cannot guarantee battery integrity especially with freezing temperatures.

Antifreeze electrical heater management: This screen sets antifreeze electrical heater activation.

The plate exchanger is protected by the antifreeze electrical heater which starts when external temperature reaches hazardous values. It can always be on or only started when the unit is in stand-by.

FC Parameters

ºC 4.0

ºC: 3.0

-DT Water IN-Ambient SetPoint

-DT Water IN-OUT Total FC Mode

-FC

Antifreeze

Glycol

-Alarm Value ºC (Singal.only)-Trip Value ºC (Stop Compressors)

%00

3.0

2.0

Antifreeze

FC Pump Activation On Stand-By N

Electrical Heaters

Ext.Temp. On ºC 00.0Mode On:Unit ON and Standby


Fan management for antifreeze:

This screen enables starting fans in the winter to eliminate ice formation if snow is blocking machine operations.

From this screen, the function can be

• disabled.

• enabled when the unit is in stand-by.

• always enabled.

You can set the set-back time (Wait s), set the fan ON time (On s), and set the percent operating speed (Speed %).

Heat recovery management: This screen sets heat recovery parameters.

• Ref.Wat.Sensor: Reference water temperature sensor (input or output)

• Water Flow FS Alarm: Enable the no water flow alarm in the recovery circuit.

• Cond.Temperature Limit: Condensation temperature limits for heat recovery management

– Switch OFF CMP: Maximum compressor switch off temperature

– Part.Circuit: Circuit partialization temperature

– Alarm: High condensation temperature alarm activation temperature

Heat recovery management: This screen sets water flow switch (FS) reading delays in the water heat recovery circuit:

• FS Start Delay: This is the acquisition delay for the signal coming from the flow switch at machine start.

• FS Run Delay: This is the signal delay of any alarm after water heat recovery circuit pump start.

CAUTIONHAZARD TO PERSONNEL

With antifreeze and/or snow sweeper function on, the fans could start even when the unit is off (only if electrically powered).


HEAT RECOVERY

Ref.Wat.Sensor: InletWater Flow FS Alarm:N

Cond.Temperature Limit

HEAT RECOVERY

Water Flow FS Alarm

FS Start DelayFS Run Delay

Fans Boost Antifr.

DisableWait s:0000 On s:00Speed %00

s00s00


Remote setpoint: This screen sets parameters for remote modulating setpoint control for unit operations.

The zero value is automatically adjusted using the Hardware Setup function (for 0–10 Vdc signal only).

Signal mode includes the following options:

• 0–10Vdc

• 0–20mAmp

• 4–20mAmp

• Digital Input

• RS485 OMI

• LAN from Unit 1

NOTE: RS485 and LAN from Unit 1 are alternatives according to the unit LAN address.

Remote offset is enabled selecting RS485 OMI. This function is only available on units with LAN 1 address.

For units with other LAN addresses, select LAN from Unit 1. This function can be selected when the unit with LAN 1 address is enabled to operate with remote offset: (0–10, 0…20 mA, 4…20 mA, Digital input, OMI).

Optimized Management: This screen sets parameters for communications between the chiller and the OMI device. The chiller and OMI device can be connected in a local network to optimize global system performance. The setpoint can be adjusted on the chiller based on internal unit operating conditions. Internal units only run in proportional mode, based on average suction temperature and communicating the chiller water output setpoint via LAN.

Internal unit software keeps the valve almost fully open while the chiller will adjust the water production temperature to ensure the conditioner or unit setpoint - ambient temperature.

• Delay Com. Start: No communication alarm trigger delay

• Start Com.Trans: Unit on communication monitoring trigger delay

• Com.Error Enable: Alarm enable

• Time Ramp UP: Sets the time required for setpoint offset to switch from minimum to maximum value.

• Time Ramp DOWN: Sets the time required for setpoint offset to switch from maximum to minimum value.

SETPOINT REMOTE

Offset Enable:Y0-10V Signal

Opt.SetP. ºC 00.0Zero Adj. mV 00

Signal % 00.0

SETPOINT REMOTE

OMI Remote Offset

Delay Com.Start s.60Start Com.Trans s.60Com.Error Enable N

Time Ramp UP m 10Time Ramp DOWN m 5

Offset Enable: YRS485 OMI Signal

Max Offset ºC: 5.0

Signal % 0.0

SETPOINT REMOTE

Offset Enable: YLAN From Unit 1

Max Offset ºC: 5.0

Signal % 0.0


Water flow-Sw. Alarm: This screen sets the No Water Flow Alarm reset mode.

The alarm can be reset manually from the keyboard or to automatically reset after a 60-second fixed time. If consecutively repeated for the maximum number set on MAX ALARM/Hour within one hour, the block alarm is triggered (with retention: reset from keyboard).

• FS Fault alarm: Water flow switch contact monitoring with the unit off.If the contact remains closed with the unit off, an FS Fault Alarm (non-blocking) is triggered.

Defrost management: This screen sets defrost settings.

Defrost request: The defrost request is run at the following conditions:

• Phase 1: The evaporation pressure of any circuit must reach the watch value.

• Phase 2: At this evaporation pressure and according to the external area read by the probe, the control immediately calculates the machine yield setting and saves the value in these conditions (∆T = Text.-Tevap. recalculated by the system with ∆T referred to a Text. of 5°C).

• Phase 3: If the evaporation pressure continues to remain under the watch value, the control will continue to save and recalculate yield every instant, comparing it with the previously set value to be able to establish its percent reduction over time.

• Phase 4: When yield reduction is lower than the value calculated by the control during stable operations, defrost is requested and will only be run if the request conditions persist for 1800 seconds (30 minutes) and the request was sent by a single circuit.

Defrost start: After 180 seconds (five minutes), the control will

• reverse the valve or 4-way valves from the heat pump to the chiller (summer mode).

• turn off compressors in any circuit not requested to defrost.

• turn off fans.

The end defrost request and compressor block start will occur if condensation pressure reaches 58°C or defrost reaches the maximum five minute time limit.

Drip cycle start:

• Phase 5: Once the compressors are off, the control runs some checks to evaluate dripping mode and time:

– 1st case: If Text < 5°C, compressors Off for 120 seconds and fans off

– 2nd case: If Text > 6°C, compressors Off for 60 seconds, fans off for 30 seconds and then on at maximum speed for the remaining 30 seconds

Defrost Param.

P.evap.Dt.rec.ºC 00.0P.evap.Dt.Res.ºC 00.0Dt reset time min 00DT.Reduct.SetP. %00

Defrost Param.

T.Evap.Start -2.0ºC Time Wait 5mTime Betw.2 Defr. 30m

Water Flow-Sw.Alarm

Max Alarm/hour:1 (1=Manual Reset)

DT C1 Air-evap.% 000DT C2 Air-evap.% 000DT.Reduct.SetP. % 00Last Def.Cycle s 000C1-C2 Def.No. 000000C1 Single Def. 000000C2 Single Def. 000000NP Def.00000 Res N


End defrost and return to normal operations:

• Phase 6: At the end of the drip cycle the control will:

– reverse the valve or 4-way valves from chiller to heat pump (winter mode)

– switch on compressors

Water pump management with inverter: This screen sets water circulation pump operations with the assistance of an inverter.

Frequency can be regulated in two different logics:

• Auto-adaptive operating logic (Autoadaptive oper.): With this logic, the unit is equipped with additional pressure transducers on the cooling water circuit.

Once the chiller is installed, the available necessary pressure can be set in Set Head Press.

Information from the sensors allows the controller to maintain this set point in all pressure loss conditions and maintain constant water flow through the evaporator even with a 2-way valve or separately installed hydraulic circuits.

This solution is helpful when the system pressure loss can vary during chiller operations with installations in which the units are equipped with 2-way valves or separate water circuits. The controller monitors pressure drops via the unit and modifies inverter speed and initial pump pressure. Required pressure prevalence can be set directly on the local display interface or by the remote BMS supervision system.

• Manual logic (Flexible operat.): With this logic, the control card sets a value for inverter speed and a value for water flow. The unit works with the water flow until it is changed. Changes can be made directly on the display under Speed Request or by the remote BMS supervision system.

This solution is necessary when system pressure loss is not fully known or site expansion is planned. Once the chiller is installed, work pressure/water flow is set on the control card according to site characteristics and the ∆T required by feed water. In the event of site changes, operating parameters can be changed to regulate correct unit operations.

Water pump PID parameter management with inverter: This screen is displayed when the water pump inverter regulation mode is set to AUTO.

The pressure difference between water input and output (working prevalence) is calculated by a PID algorithm which generates a 0-10 V ramp to command the water pump inverter. This way, if utility load loss changes, the system reacts by changing the water flow to load.

Pump Inverter

CTRL Head Press:Y(Autoadaptive oper.)

Act.Head Pres.kPa 0000

Al.Max Speed 100.0%Set Head Press.kPa 150

Pump Inverter

CTRL Head Press:Y (Flexible operat.)

Act.Head Pres.kPa 0000

Speed request 000.0%

Pump PID Regulation

Act.Head Pres. kPa 000Set Head Press.kPa 000Prop.Band 0000Int.Time s 000Der.Time s 000Usage of Pres.Values Local

See “Default Values Update and Protocol Variables” on page 75 for more information.


This screen sets the following parameters:

• Available prevalence setpoint: calculates the difference between water output and input pressures. When the prevalence (∆P out-in unit) is higher than the required setpoint, the pump reduces water flow.

• Proportional band

• Integral time

• Derivative time

This screen (read only) displays the following inverter settings:

• Minimum and maximum frequency

• Acceleration time

• Deceleration time

IMPORTANT: To avoid system oscillations, we recommend you set high proportional band and integral time values.

Pump operations can also be managed with the measured “average” pressure value or with the “local” value measured by the single probe in the unit:

• Mode: Local: The pump is controlled by the pressure values read by the unit probes.

• Mode: Average: The pump is controlled by the average pressure values read by unit probes connected in the local LAN.

Water pressure alarm management: When the inverter pump is installed, this screen sets the following parameters:

• High water pressure alarm

• Low water pressure alarm

• Maximum pressure read in the hydraulic circuit

Low Power Management: This screen sets the compressor low current absorption function reducing cooling power.

You can change between five different options.

• Disable: Always disabled

• Always On: Always enabled

• ON by Timer: Set required time bands in the CLOCK menu

• On by Supervisor: Switched on via BMS (see variable list)

• ON by Digital Input: Enabled by ID11 digital contact

See wiring diagram enclosed with the unit for more information.

Power limit: This sets the maximum current threshold that cannot be exceeded when the Low Power function is on.

Start Next Step: If the measured power is the given percentage less than the Power Limit setpoint, the control re-attempts the compressor call by one step.

Pump Inverter

(Read only)Min frequency: 0.0HzMax frequency: 0.0Hz

Accel.time: 0.0sdecel.time: 0.0s

Water Alarm

Hi P. Alarm kPa 600Low P. Alarm kPa 50Hysteresis kPa 10

Max.P.rec. kPa 123

OptionalLOW POWER Function

Disable

CTRL Type: PowerPower limit SetP kW000Start Next Step <00%


Power Supply Management: This screen manages UPS power from the Ultracapacitor in a blackout.

It sets the following parameters:

• The volt threshold for the Ultra Capacitor to switch on

• The switch time the driven main switch takes to switch power lines

• The time the Ultra Capacitor takes to charge internal condensers

• The maximum assumed Ultra Capacitor activation time

• The delay to trigger a warning alarm before the Ultra Capacitor is fully depleted

QuickStart management: This screen enables the QuickStart function.

If the water temperature is higher than the SetP summer + set setpoint after power returns (Power ON), the compressors will turn on in about three minutes.

Initial transistor management: This screen sets the following initial transistor behavior settings:

• The machine restart delay after a blackout (POWER ON DELAY), it is used to prevent simultaneous peaks in multiple installations; in LAN units, a gradual start sequence is automatic (unit 1, unit 2, etc.) with 5-second intervals between each unit.

• The period of time between machine switch on and regulation start (START TRANS.), it is the period deemed necessary to obtain control system stability. FS water flow switch readings are ignored during this period; this allows for machine start without triggering the No Water Flow alarm.

• Water temperature alarm signal delay from unit start (T Al. Delay)

This screen sets the following water flow switch reading parameters (FS):

• FS Start Delay: This is the acquisition delay for the signal coming from the flow switch at machine start.

• FS Run Delay: This is an alarm signal delay after pump start.

• Pump Changeover (only displayed if two pumps are installed): The pump operating rotation time.

Compressor time management: This screen sets the following compressor times:

• Cycle minimum: Minimum time between two peaks by the same compressor

• Minimum Run Time: Minimum time each compressor remains on

• Minimum Off Time: Minimum time each compressor remains off

• Between 2 diff.: Minimum time between two consecutive starts by different compressors

• Betw.2 diff.min.: Minimum time between two consecutive starts by different compressors with high thermal load

• F.C. K Multipl.: Minimum time between two consecutive starts by different compressors with partial free-cooling on

Emergency Recovery

Enable: Y

Activ.At Power ON IfTemp wout>SetP+ºC 6.0

DELAY SETTINGSPower On Delay s 000Start Trans. s 20Temp.Al.Delay min 15

Power Supply SettingsThresh. Failure V20.0I.G. Time Ch.Over s20

UCAPRecharge Time s300Max Time Life s60Delay Work Alarm s10

DELAY SETTINGSFS Start Delay s 10FS Run Delay s 5Pump Changeover h 12

COMPRESSOR TIMINGCycle minimum s 360Minimum Run Time s 120Minimum Off Time s 180Between 2 diff. s 75Betw.2 diff.min. s 30

F.C. K Multipl. 2.0


This screen sets the following compressor times:

• LP-Start Delay: This is the initial period, from compressor start, during which low-pressure pressure switch readings are ignored; it lets the compressor start in even rigid climates.

• LP-Run Delay: This is the alarm signal delay during normal operations.

Thermoregulation graph management: This screen sets parameters to view temperature/pressure/humidity values read during a certain period of time on a graph on the display interface.

• Sample Time: Identifies the interval used to save data.

• Reset graph: Identifies graph and all saved data reset.

• Autoscale: Identifies automatic scale activation. Values are between the minimum recorded value/10 - 1 and the maximum recorded value/10+1.

• Low limit: Identifies the minimum value plotted on the Y axis when autoscale is off.

• High limit: Identifies the maximum value plotted on the Y axis when autoscale is off.

Sensor calibration

Sensor correction management: These screens set a correction (“adjustment”) to unit temperature and pressure probe readings (“read value”) if a difference is found between the value read by the probe and the actual value measured with a precision instrument.

The following sensors may be included:

• Water IN Temp.Sensor

• Water OUT T. Sensor

• Water Tank T. Sensor

• Ambient Temp.Sensor

• C.1 Evap.Pressure

• C.2 Evap.Pressure

• C.1 Cond.Pressure

• C.2 Cond.Pressure

• Water Input Pressure

• Water Output Pressure

• Liquid C1 T. Sensor

• Liquid C2 T. Sensor

• Heat Rec In T. Sensor

• Heat Rec Out T. Sensor.

Thermoreg.Graph settings

Sample Time: 00:00:00Reset graph: NAutoscale: NLow limit: 000High limit: 000

Offset Adj.

Water IN Temp.SensorRead Value ºC 000.0Adjustment ºC 00.0

COMPRESSOR TIMINGLP-Start Delay s 90LP-Run Delay s 10


Memory operations

This screen is used for the data in the microprocessor Flash EEPROM.

Program Setup:

1. This operation is run automatically when the program in the Flash EEPROM is overwritten.IMPORTANT: At the beginning of the setup program procedure, this screen appears and warns that all settings will be lost.To proceed, confirm by selecting YES.

2. “During the procedure (that lasts several minutes) the Default installation running... Please wait” message appears.

3. Next, electronic thermostat drivers are initialized.

DEFAULT VALUE

Program Set up NAl.Page Clear-up N

DEFAULT VALUEATTENTION!

ALL PARAMETERS WILL BE ERASED

Continue? YES

DEFAULT VALUE

INITIALIZATION

Default installation run-ning....

Please wait

DEFAULT VALUE

INITIALIZATION

EVD EVO default running...


4. Without turning off unit power, wait until the procedure ends and the message “INITIALIZATION COMPLETE” appears. Turn off card power, wait until all LEDs and the user terminal turn off. The procedure may take longer with ultracapacitor module.

This may be helpful when data is “contaminated” (setpoints, settings, etc.) since it clears the memory (including unit HARDWARE configuration data); all default values are restored automatically. Control settings must be reset after this operation and values edited if default settings are not required.

IMPORTANT: When any one configuration parameter is changed (and in the event of overwriting the program in the Flash EEPROM), the RAM memory must also be reset, which turns off control power for several seconds.

• AL. PAGE CLEAR-UP.: This permanently deletes all alarm events in the memory.

This screen displays the data stored in the electronic expansion thermostat (EVD) module memory.

IMPORTANT: The memory must be cleared whenever the electronic expansion thermostat (EVD) is replaced.

Login password settings: This changes the login password

• At calibration (Settings password).

• At configuration (Configurations password or Service password).

Since access to the HARDWARE menu is denied if the relevant password is unknown, we recommend you note the new password before changing the previous one.

Manual control

During normal operations, all components installed on the unit are automatically controlled. However, to facilitate maintenance and regulations or in the event of an emergency, they can be manually forced independent of the single component switch on regulation processes.

To edit parameters, enter the MANUAL CONTROL subroutine in the HARDWARE menu until the CONFIGURATION password request form is reached.

Automatic/Manual operating mode: To change the operating mode for a component, move the cursor to the relevant row, press UP or DOWN to change from automatic (No) to manual (Yes) or vice versa and confirm by pressing ENTER.

Safety devices are on during manual operations.

DEFAULT VALUE

INITIALIZATION COMPLETE

switch-off and back on the controller

DEFAULT VALUE

EVD Set up C1: NEVD Set up C2: N

SET-UP OF PASSWORDS

For Accessing To:Settings 00000Service 00000


In manual mode, peripherals on the unit that can be controlled as follows are displayed:

• Auto: The peripheral is controlled automatically by the unit application

• Man ON: Peripheral manual control on

• Man OFF: Peripheral manual control off

The following peripherals can be controlled:

• Water Circulation Pump (even with inverter) and Free-Cooling Pump control

• Compressor 1/Compressor 2

• SwitchOver: Forces 1-2 pump exchange (version with two pumps installed)

• Fan Speed/Out Ramp

• Solenoid Valve: Liquid solenoid valve and condenser battery partialization control

MANUAL OVERRIDE

Compressor 1 AutoCompressor 2 Man ON

Compressor 1 100%

MANUAL OVERRIDE

Pump 1 YPump 2 NSwitchOver P1-2 N

MANUAL OVERRIDEUnit Start-Up Y

Inverter Req. 000%(0=Auto)

Free-Cooling Pump AUTO

MANUAL OVERRIDE

Fan Speed % 0Out Ramp % 0Ramp (Force) Y1: % 0

MANUAL OVERRIDESolenoid Valve

ETF1 MAN 0NETF2 AUTO

ETC1 MAN OFFETC2 AUTO


Serial communications

Transmission settings for BMS: This screen sets key parameters for commutation via BMS, specifically:

• The serial address of the unit connected to the BMS serial network (it must match the serial address set in the supervision program).

• Data transmission speed (Ser. Speed): 1200, 2400, 4800, 9600, 19200, and 38400.

• The protocol type (Standard or Modbus).

The following shows how the pCO5+ card provides the possibility of interacting with two communication protocols directly from the unit.

The pCO5+ card provides the possibility of interacting with two communication protocols directly from the unit.

The BMS2–J25 connector port is an RS485 embedded connector where data can be exchanged on RTU or Carel® Modbus.

The BMS1 port provides interaction with the main supervisory networks by installing the correct connection card. The protocols that can be reached are TCP/IP, SNMP, BACnet Over IP, BACnet MS/TP, LON, Modbus RTU, Modbus Over IP, KonneX, Metasys (via gateway Johnson Controls), and Trend (via gateway Trend).

NOTICEDAMAGE TO MEMORY CARD

The ‘T’ memory is a FLASH memory which deteriorates at each write cycle. 10,000,000 write cycles are guaranteed in total (regardless of the variables saved). When this limit is exceeded, the memory could be damaged triggering an alarm, making card replacement necessary.

We recommend you avoid continuous writing to avoid deteriorating the card.


Serial Port 1 (BMS1-Ser.Card)To Supervision/BMSSerial Addr.: 1Baudrate: 19200Protocol: Standard

Serial Port 1

RS485 (BMS-J25)To Supervision/BMSSerial Addr.: Baudrate:Protocol:

Serial Port 1

WARNING:Too many BMS

Write from BMS

00119200Standard

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pCO5

J11 pLAN

J25 BMS2 J26 FBUS2

Tx/Rx GND

Tx/Rx GND Tx/Rx GND

J12 J13 J14J15 J16 J17 J18

J21 J22 J23 FBUS2

J19 J20

J8

J7

J6J5J4J3J2J24J1

J10

C7

NO7

C7

NO8

C8

NC8

ID2

ID4

ID6

J25 BMS2

BMS1


Alarm addressing

Alarm addressing: The screens in this section assign an “address type” to each of the alarms in the list and, specifically:

• Type A: The alarm is found on the digital output 8 relay.

• Type AR: The alarm is found on the digital output 8 relay and rotates the unit in stand-by.

• Type B: The alarm is found on the digital output 13 relay.

• Type BR: The alarm is found on the digital output 13 relay and rotates the unit in stand-by.

NOTE: Some alarms may or may not appear based on machine configuration.

legend:--=no actionA=Relay 8AR=Relay 8 + RotationB=Relay 13BR=Relay 13 + Rotation

ALARM ADDRESSING

Water Flow AWater Flow Serious ARPump Therm.Switch A

Antifreeze BAntifreeze Serious ARHigh Ev.Water IN T. BLow Ev.Water In T. B

High Pressure ARCompr.Thermal BCompr.Thermal Ser. ARLow Pressure BLow Pressure SeriousAR

I.G. Offline BToo Much ChangeOver A

Unit IN Sensor --Unit OUT Sensor ARExt.Air Sensor BWater Tank Sensor BCond.Press.Sensors AEvap.Press.Sensors ART.Liquid Sensors BAdditional Probe B

Phases Sequence BPhases Sequece Ser. AREEPROM ARSupply Frequency ARWrong Password --Fan Thermal BFan Thermal Serious ARFuse Fault A

Pumps Run Hours --Compr. Run Hours --

LAN Interrupted ABMS Error --

Heat Recovery:- Not Possible B- Locked AR

Water IN/OUT Sensor AExp.Board Offline AR

CONTACT MODEAlarm A Output:N.O.Alarm B Output:N.C.

Legend:N.O.: Normally OpenN.C.: Normally Close

ALARM ADDRESSING Water Press.Sensors BHi/Low Water Press. AInverter P. Offline ARInv. P. Not Serious BInverter P. Serious A

Gas Detector BGas Det. Run Months B


Network Configuration

OverviewSeveral units installed in the same room can be connected in a local network to manage the environmental conditions as a group.The following guidelines describe group configurations:

NOTE: Units in a network can be connected at a maximum of 500 m (1640 ft).

NOTE: All units connected to the network must have the same version of flash memory on the board.

A terminal can be configured as “private” or “shared”:

• A private terminal shows the status of the single unit connected to it by a telephone cable.

• A shared terminal shows the status of all the units connected to the network.

Each board can “talk” to three terminals at most; there are usually no more than two in normal operation: one in the unit and one possibly in a remote location.

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pLAN32 SHARED

pLAN11 PRIVATE

pLAN12 PRIVATE

NETWORK pLAN

UNIT 1 UNIT 2


Alarm signals always have priority over the terminal even if the parameters of another unit are being viewed when the alarm is triggered.

To communicate on the local network, the units must be configured so that each of them can convey the information necessary to operate properly. The units must be numbered progressively (1, 2, 3,...10) and the various terminals and LAN boards correctly addressed to them. The electrical connections must also be made as described in the following sections.

pLAN address settings

Configuring the pLAN address

The pLAN address for the pCO5 range can be assigned in two ways:

1. With the new function for the pCO5: a dedicated key and a 7-segment LED display

2. With an external terminal (e.g., pGD1)

The default setting of the pLAN address of the pCO5 programmable controller is ‘1’ for board number 1 and ‘21’ for board number 2; it is assigned a private terminal with address ‘11’.

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pLAN32 SHARED

pLAN11 PRIVATE

pLAN12 PRIVATE

UNIT 1 UNIT 2

pLAN14 PRIVATE

pLAN13 PRIVATE

UNIT 4 UNIT 3


Configuring with the key and display

1. On the microprocessor controller, use a screwdriver to press and hold the “A” button. Wait 2–5 seconds; the display flashes and the IP address appears. After releasing the button, the display clears.

2. To change the address, continue pressing the button on the controller until the correct address displays, then remove the screwdriver.

3. When the address starts flashing quickly on the display, the address is saved.

4. Power cycle the controller to activate the selected address.

Configuring with an external terminal: The address of the controller can be set with a remote display interface after connecting it to the J10 connector of the pCO5 controller on the pLAN. All other devices connected to the controller via the pLAN have to be disconnected.

NOTE: The default setting of the pLAN address is ‘1’; the pCO5 is also assigned a private terminal with address ‘32’.

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pCO5

J11 pLAN J25 BMS2 J26 FBUS2Tx/Rx GND Tx/Rx GND Tx/Rx GND

J12 J13 J14J15 J16 J17 J18

J21 J22 J23 FBUS2

J19 J20

J8

J7

J6J5J4J3J2J24J1

J9 J10

C7

NO7

C7

NO8

C8

NC8

ID2

ID4

ID6

“A” BUTTONna

5755

a

pCO5


J12

J3J2J24J1

J9 J10


If the pCO5 with default setting (address = 1) is connected to an external terminal (address = 32), communication is established and the same information is shown on the external terminal as on the local terminal (if there is a local terminal). If instead the pCO5 control has a different address (e.g., 2) and the terminal is not set to communicate with the controller with this address, the screen on the terminal will turn blank when connection is established. If this occurs, perform the following procedure:

1. Press UP, DOWN, and ENTER at the same time to open the terminal address configuration screen.

2. Set the address of the display to ‘00’. Press ENTER to confirm.

3. Power cycle the controller.

4. Press and hold ALARM and UP until the following screen appears:

5. Set the pLAN address of the controller if necessary, and press ENTER to confirm.

Display addressSetting................:11

I/O Board address: 01


############################Selftest

Please wait...############################

pLAN address: 02UP:DOWN:ENTER:

increasedecrease

save & exit


Addressing the external terminal: The address of the pCO5 controller is now known. The address of the terminal needs to be set and a connection between the controller and the terminal needs to be established.

1. Press UP, DOWN, and ENTER at the same time to open the terminal address configuration screen.

2. Change the address, and press ENTER to confirm.

3. No messages appear on the display.

4. Press UP, DOWN, and ENTER at the same time, then press ENTER twice and set the address of the controller to ‘02’. Press ENTER to confirm..




NO LINK




5. Press ENTER to continue.

6. According to the application, set the address of terminal 1 (Trm1) to ‘12’ and as private, and the address of terminal 2 (Trm2) to ‘32’ and as shared. Press ENTER to confirm and exit.The connection is established after a few seconds.

Terminal and pCO addresses

Address of Private Terminal

Address of pCO Board

Address of Private Terminal


Address of Remote Terminal


11 1 16 6 32 All addresses

12 2 17 7

13 3 18 8

14 4 19 9

15 5 20 10

Terminal configPress ENTERto continue

P:02 Adr Priv/SharedTrm1Trm2Trm3

1232None

PrSh--


pLAN Connections Between the Units• The units are connected to the pLAN with AWG20/22 shielded, twisted pair cables with a capacitance of

less than 90 PF/m.

• The maximum length of the network is 500 m with an AWG22 shielded, twisted pair cable.

• The boards are connected in parallel in relation to the J11 connector.

IMPORTANT: Make sure to connect the poles of the network correctly: the RX/TX+ connector of a board must be connected to the RX/TX+ connector of the other boards; the same applies to the RX/TX- connectors.

The following depicts the layout of various boards on a pLAN powered by different transformers (with the G0 not connected to ground). This is a typical application involving various boards belonging to different electrical panels.

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J11 pLANTx/Rx GND

pCO5


J12

J3J2J24J1

J9 J10

pCO5


J12

J3J2J24J1

J9 J10

pCO5


J12

J3J2J24J1

J9 J10

UNIT 1 UNIT 2 UNIT N


Remote Control of the Terminal with pLANWhen the pCO boards are connected on a pLAN, the terminal can be remotely controlled from up to 50 m away using a telephone cable or from 500 m using a twisted pair cable, TCONN6J000, and a separate power supply.

NOTE: For a connection of the maximum length, use a bus cable with branches not exceeding 5 m.

The following sections are examples of the connections of the various configurations. If using the display interface in a domestic environment, the cable must always be screened.

Type of CableMaximum Distance From Power Supply Power Supply

Telephone 10 m From pCO (150 mA)

AWG24 screened cable 200 m From pCO (150 mA)

AWG20/22 screened cable 500 m Separate power supply via TCONN6J000

pCO5


J12

J3J2J24J1

J9 J10

6 5 4 3 2 1 0

1 2 3 1 2 3

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UNIT 1

REMOTE CONTROL WITH A SHARED REMOTE DISPLAY INTERFACE USING TELEPHONE CABLE AT MAXIMUM DISTANCE OF 10 M

pLAN1

pLAN 32SHARED

pLAN 11PRIVATE

MA

XIM

UM

10

M


pCO5


J12

J3J2J24J1

J9 J10

6 5 4 3 2 1 0

1 2 3 1 2 3

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6 5 4 3 2 1 0

1 2 31 2 3

6 5 4 3 2 1 0+ - TX TX - + RX RX + -

UNIT 1

REMOTE CONTROL WITH A SHARED REMOTE DISPLAY INTERFACE USING SCREENED CABLE AT MAXIMUM DISTANCE OF 200 M

pLAN1

pLAN 32SHARED

pLAN 11PRIVATE

MA

XIM

UM

200

M

CONNECTION TO TCONN


pCO5


J12

J3J2J24J1

J9 J10

6 5 4 3 2 1 0

1 2 3 1 2 3

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6 5 4 3 2 1 0

1 2 31 2 3

UNIT 1

REMOTE CONTROL WITH A SHARED REMOTE DISPLAY INTERFACE USING SCREENED CABLE AT MAXIMUM DISTANCE OF 500 M WITH A SEPARATE POWER SUPPLY

pLAN1

pLAN 32SHARED

pLAN 11PRIVATE

MA

XIM

UM

500

M

POWER SUPPLY20...30Vdc – 150mA


NOTE: The length of the network must not exceed a total of 500 m. If the terminal is remote controlled, the length of the terminal cable is included in the total length.

NOTE: The terminal cable represents a branch of the network. If it is more than 5-m long, it can be connected to only the first or last pCO on the network.

If both pin-strip jumpers are located between 2 and 3, the flow of current is interrupted between the separate connectors and the dotted line. For all the connectors to be powered, both jumpers have to be between 1 and 2.

Terminal 0 is a supporting terminal and can be used to connect the screened cable to the earth; the “T” parallel resistance must be connected to a metal part of the unit that is already grounded.

3x2 AWG24 Cable

Terminal Cable Function Connections

0 Earth (braid) Screening

1 +VRL (= 30 Vcc) 1st twisted pair A

2 Gnd 2nd twisted pair A

3 Rx/Tx– 3rd twisted pair A

4 Rx/Tx+ 3rd twisted pair B

5 Gnd 2nd twisted pair B

6 +VRL (= 30 Vcc) 1st twisted pair B

6 5 4 3 2 1 0

1 2 31 2 3

+ -

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REMOTE CONTROL WITH A SHARED REMOTE DISPLAY INTERFACE USING SCREENED CABLE WITH A SEPARATE POWER SUPPLY VIA TCONN6J000

POWER SUPPLY20...30 Vdc –150mA

AWG22ONE TWISTED PAIR

J14 AND J15 ON 2–3ONLY TCONN6J000


LAN and Supervision Connection CableFor connection to both LAN and supervision networks, it is recommended to use a cable with the following specifications:

• Multi-coupled cables with internal flexible conductors made from tin plated copper (AWG 22/7)

• Insulated with polypropylene, singularly coupled, screened with aluminum/polyester tape + continuity wire in tin-plated copper (AWG 24/7) connected on a common axis to reduce the diameter and protected by an external sheath in PVC.

Viewing the Network from the TerminalFrom any terminal in the network, the screen “NetStat” will appear when UP, ENTER, and DOWN are pressed simultaneously and held for at least 10 seconds.

The “NetStat” screen indicates all of the pCO boards with a LAN address and all of the terminals present in the network including the remote shared terminal and its relative addresses.

In the example, the result is that the network is composed of three LAN boards with the addresses 1, 2, and 3 and of four user terminals with the addresses 11, 12, 13, and 32.

Article

Ø External Om.

Conductor Resistance Maximum

Impedence Capacity (pF/m) Operating Voltage

Operating Temperature

(mm) (ohm/km) (ohm) C1 C2 (V) (ºC)

Y08723

2x2xAWG22/74.50 54.8 50 108 198 300 –10/+60

NetStat:T:11EnterTo Exit

1 ----- 89 -----1617 --------24

25 -------- 32

pCO BOARD

PRIVATE TERMINAL

SHARED TERMINAL= BOARD

= TERMINAL


LAN SettingsThese screens set LAN operating parameters. Only units with a pLAN1 address are set so that information is automatically propagated to the other units connected in the network.

This screen displays the following settings:

• LAN Unit No.: The number of units connected to the pLan

• Automatic Switch-Over of Stand-by Unit: Enables unit switch over

• Cycle Time: Set the cycle time to switch units in stand-by Set time to 000, a simple test is run rotating the units at 2 minute intervals).

• No.of Std-By Units: Set the number of units to be kept in stand-by (maximum when the number of connected machine is more than 3).

Stand-By Unit Mode On: Set the unit in standby activation mode which can be the following:

• STANDARD: Unit in standby activated in standard mode

• ON AFTER OFF: Unit in standby only activated after the unit is fully switched off due to a triggered alarm or by cycle time

• OFF AFTER ON: Unit in standby switched off due to a triggered alarm or by cycle time is only switched off after the unit in standby is switched on

REG.STEP CALLING MODE: Sets the regulation step call mode to one of the following options:

• STANDALONE: The control automatically manages water temperature thermal regulation.

• INTERLACED: The control manages water temperature thermal regulation calculating the average temperature of running units.

• CASCADE: The control applies an offset to the regulation set point according to the units connected in the network to allow units to be activated in succession. Each unit keeps its own regulation times.

USAGE OF TEMP. VALUES: This screen is used to select one of the following temperature value options used for machine operations:

• Mode: Local: The machine control uses the temperature values read by the probes on the unit.

• Mode: Mean: Machine control uses the temperature values read by the probes on the running units connected in the local network. Should the difference between the mean value and probe readings exceed “MEAN/LOC”, the control automatically switches from “MEAN” to “LOCAL”. The unit is standby is excluded from the mean calculations.

NOTE: These settings are not propagated on the other units, and are required for each unit.

LAN:Unit number

Automatic Switch-Over:of Std-by Unit:Cycle Time h

N Stand-by units

LAN CONFIGURATION

Standby Unit Mode ON:

Standard

Sustain Unit OFF s 00

LAN CONFIGURATION

Reg.Step Calling Mode:Standalone

Usage of Temp.ValuesMode: Local

LAN CONFIGURATION

Reg.Step Calling Mode:Standalone

Usage of Temp.ValuesMode: MeanMean/Loc.Diff. ºC 0.0

LAN CONFIGURATION

02

Y160

1


EXV Settings

These screens display electronic expansion valve read data and operating settings.

This screen manually controls electronic expansion valve opening and closing (Mode: Man).

NOTICEHAZARD OF EQUIPMENT DAMAGE

These parameters must be modified by qualified and authorized personnel. If incorrectly set, these parameters could cause unit malfunctions and serious damage.


Circuit 1 ValuesCircuit 2 ValuesSettings

EXV WORKING PARAM

C.1 Evap.PressureRead Value BarAdjustment Bar

C.1 Suction Temp.Read Value ºCAdjustment ºC

PROBES OFFSET ADJ.

Opening StepsMode

C.1 MANUAL CONTROL

Capacity req.Opening StepsEvap.Press. BarEvap.Temp.Suct.Temp.SuperHeatSSH SetFirmware version:

% 000n 0000000.000.000.000.000.0

000.0

000.000.0

000.000.0

0000AUT


Parameter settings

These screens set electronic expansion valve operating parameters according to machine operations (Chiller, Heat pump, Defrost) and the number of chiller circuits.

• Setpoint: Sets the super heating setpoint to be maintained when the unit operates in Chiller Mode.

• Prop. Gain/Integ.Time/Derivat.Time: Sets PID logic control.

• Circ./EXV Ratio: Sets valve pre-positioning at compressor start. It is the ratio, in percent, between maximum circuit cooling capacity regulated by the EVD driver and the one that can be obtained with maximum expansion valve opening in the same operating conditions.

• SSH Low Limit: Sets the low super heating limit setpoint.

• MOP Set: Sets the evaporation temperature threshold.

• LOP Set: Sets the evaporation low temperature threshold.

This screen indicates the percent power applied to the valve for the first and second compressor steps in circuit 1. It is used by the valve to calculate pre-opening.

This screen displays the transducer offset.

This screen sets the regulation integral time for the following items:

• LowSSH: Low super heating

• MOP: High evaporation temperature

• LOP: Low evaporation temperature

This screen sets alarm trip delays for the following items:

• LowSSH: Low super heating

• High Suct.T: High suction temperature

• LOP: Low evaporation temperature

• Press.Prob. Failure at comp. Start: Pressure probe disconnected at compressor start

• Press.Prob. Failure at normal working: Pressure probe disconnected during normal use

SetpointProp. GainInteg.TimeDerivate.TimeCirc./EXV Ratio

Circuit 1 Chiller Mode

Circuit 1 Chiller Mode

COMPR. 25% 50% 75%100%

EXV Power Cooling

SSH Low LimitMOP SetLOP Set

0.0ºC0.0ºC0.0ºC

0.0ºC0.0 000s 0.0s 000%

Low SSHHigh Suc.TLOP 0000

Press.Prob. Failure:At Comp.StartAt Normal Working

EXV Alarm Delay (s)

LowSSH Int.TimeMOP Integr.TimeLOP Integr.Time

EXV Power Cooling

00.0s00.0s00.0s

Range Begin. bar 0.0Range End. bar 0.0Brand:Danfoss

EXV Power Cooling

EXV 60% 75% 90%100%


This screen sets the following items:

• MOP Startup delay: MOP control start delay

• Max Suction T.: Maximum suction temperature setpoint

• Overclos. steps: Themostat valve steps with compressor off

This screen sets the model of the valve installed on the machine.

Alarm Reading

Triggered alarms

Press the ALARM key to mute the alarm buzzer. The alarm description is displayed.

If the cause of the alarm was eliminated, the last alarm message can be reset by holding down the ALARM key for several seconds; in this case, the red key light immediately turns off. If the cause of the alarm was not eliminated, the buzzer sounds again.

Alarm log sequence: To reconstruct the alarm log sequence, the microprocessor keeps the last 200 events in its memory. All saved alarms can be read in series in the Alarm log menu.

Hour meter threshold alarms are not saved or read (SERV.). The first event in the sequence corresponds to the last alarm tripped. In control cards equipped with clock cards, each saved alarm event is associated with the date and time it tripped.

Alarm descriptions

Following are all the possible alarm messages that may appear on the user terminal. General troubleshooting information is only provided for alarms still active (thus not those saved in the log sequence) in the last two display rows.

Evaporate circuit no water flow pre-alarm: It is automatically reset after 60 seconds. If it is repeated four times in a row within one hour, the alarm is triggered (with retention: it must be reset from the keyboard). For alarm configuration, see the Water Flow-Sw Alarm in Software Settings menu. If configuration remains in manual mode, only the no water flow alarm is displayed.

NOTE: This alarm screen is only visible when the unit is not equipped with a water pump on the machine.

MOP Startup delay

Max Suction T.

Overclos.Seps

EXV General Set

Valve: SEI50-SEH175Refriger.Gas: R134a

EXV Drive Set

EVAPORATOR:No Water Flow

Nº001 12:00 01/01/15

No Water FlowCheck Hydraulic

Circuit(Automatic Reset)

30

30.0

2000


Incorrect phase sequence or limits exceeded alarm: Components with three-phase power must rotate in the correct direction or lose efficiency. The mains phase sequence may force opposite rotation direction in units with three-phase power only; in this case, as soon as the unit is powered, the microprocessor immediately triggers an alarm preventing any other maneuver. In this case, turn off machine power and invert the two power phases or check wiring.

Circuit 1 low pressure pre-alarm: This warning is automatically reset after 60 seconds. If it is repeated four times in a row within one hour, the alarm is triggered (with retention: it must be reset from the keyboard).

Same signal for circuit 2.

Circuit 1 high pressure alarm for manual reset high pressure pressure

switch trip:


Pump 1 overload alarm (or contactor fault): Same signal for pump 2 and free-cooling pump.

Input water high temperature alarm: Triggered when the maximum set limit is exceeded.

Input water low temperature alarm: Triggered when the minimum set limit is exceeded.

Compressor 1 overload pre-alarm: Triggered when the digital input connected to the compressor overload opens due to internal overheating. Check electrical absorption and refrigerant load.

Same signal for other compressors.

Low PressureCircuit 1

Check Chiller CircuitLoad Refrigerant(Automatic Reset)

High PressureCircuit 1

Check Chiller Circuitand/or Condenser

Pump 1 StoppedCheck Motor protec-

tion/Contactor

Input Water Temp.Over Minimum Limit

Compr. 1 OverloadCheck Absorption/

Power Voltage Phase/limitCheck

(Automatic Reset)

Input Water Temp.Over Maximum Limit


Incorrect password entered alarm: This screen signifies a failed attempt to login to calibration or configuration screens after entering an incorrect password three times in a row.

Resetting the alarm:

1. Open the Hardware Config. menu and enter the correct password.

2. Use the command AL. PAGE CLEAR-UP (screen 157) to delete the alarms in the memory.

3. Exit the subroutine by pressing ESC.

4. Press and hold down the ALARM key for five seconds until the red light turns off.

Input water temperature probe fault alarm: This type of alarm is also displayed for the following reasons:

• Output Water Probe

• Accumulation Water Probe

• External Temp. Probe

• Evaporation/Condensation Pressure Probe

• Input Water/Heat Recovery Output Probe

• Accumulation Tank Probe

• Optional Additional Probe

• Water input/output Pressure Probe

Pump 1 work hours exceeded signal: This type of alarm is also displayed for the following:

• Pump 2

• Free-cooling Pump

• Compressors

Internal EEPROM fault signal: Replace the pCO controller.

LAN interrupted signal: Check LAN electrical connections and disconnected unit operations.

Input Water ProbeInterrupted or Fault:Check Probe/Connect

Pump 1Exceeded 00000 work

hours

EEPROM DamagedReplace the Control Card

LAN downUnits not connected:1 2 3 4 5 6 7 8 9 10

Login AttemptsWith Incorrect Pass-

word(At least 3 Attempts)


Alarm triggered before the pump starts: The control checks flow switch contact status before pumps start; if the contact remains closed, the control interprets it as a fault. Alarm is disabled when there is no water pump installed.

Circuit 1 antifreeze pre-alarm: This warning is automatically reset after 60 seconds. If it is repeated four times in a row within one hour, the alarm is triggered (with retention: it must be reset from the keyboard).


Circuit 1 No electronic thermostat valve communications with pCO control

board: Check tLan electrical connections or driver power.


Suction temperature probe fault alarm: This type of alarm is also displayed for Liquid Refrigerant Temp.Probe.


MOP protection failure alarm: Excessive evaporation pressure or MOP is higher than the set threshold for an interval of time over the Alarms Delay.


Circuit 1 LOP protection failure alarm: Low evaporation pressure or LOP is lower than the set threshold, for an interval of time over the Alarms Delay.


Circuit 1 low super heating alarm: Low super heating for an interval of time over Alarms Delay.


Flow switch faultCheck commutationcontacts/Connect

Antifreeze Circ. 1Check Evap. Clean/Load Refrigerant

(Automatic Reset)

Driver EXV Circ.1:No communicationsTlan Interrupted

EXV1: Suct. T. ProbeInterrupted or Fault:Check Probe/Connect

Driver EXV Circ.1:MOP Prot. Failed

Driver EXV Circ.1:LOP Prot. Failed

Driver EXV Circ.1:LowSSH


EXV driver internal EEPROM memory error: Replace the driver.


Heat recovery not possible alarm: This alarm indicates that the recovery request caused compressor operations out of admitted operating limits or the high pressure threshold was exceeded for recovery 4 times in a row in one hour.


No pCOe expansion board communications with the pCO control board:

Check tLan electrical connections or pCO board power.

Fan overload protection alarm: Fan overload protection contact is opened.

Evaporator water circuit pressure exceeds the Low Press. minimum

threshold Alarm: Set in the Water Alarm screen in the Software Settings menu.

Check the water circuit.

High Pressure Hydraulic circuit alarm: Evaporator water circuit pressure exceeds the high pressure maximum threshold set in the Water Alarm screen in the Software Settings menu.

Check the water circuit.

Antifreeze electrical heater power fuse is in fault: Check and replace the fuse with the same rated value.

Driver EXV Circ.1:EEPROM Error

Heat recoverynot possible

(out of limits)

pCOe:Expansion boardNot Connected

Fan Overloadprotection

Low P.Hydraulic Circ.

High P.Hydraulic Circ.

Fuse 230V F1Electrical Resistance

Fault


Energy meter alarm: Communications are down with the Energy Meter module.

Free-cooling driven valve bloack alarm: Stroke contact remains closed (valve fully open) with a free-cooling driven valve installed and free-cooling pump off.

Inverter pump OFFLINE alarm: Refrigerant gas probe (optional) detects a gas leak in the machine.

Refrigerant gas probe (optional) exceeds the work hour threshold.

OMI not connected alarm: This screen displays the no communication alarm between OMI and LAN 1 chiller: In this situation, all chillers will work at the minimum setpoint.

Fault Code Fault ID Fault name Possible cause Solution

1

1Over current (hardware fault)

The CA inverter found too high current (>4*IH) on the motor cable.• Sudden load peak• Short circuit on motor cables• Unsuitable motor

• Check the load.• Check the motor.• Check cables and connections.• Run identification.• Check ramp times.

2Over current (software fault)

2

10Over voltage(hardware fault)

DC link voltage exceeded set limits.• Deceleration time too short• Brake chopper disabled• High over voltage peaks in feed• Start/stop sequence too fast

• Increase deceleration time.• Use the brake chopper or resistor

(if available). Start the over voltage controller. Check input voltage.

11Over voltage (software fault)

320

Ground fault (hardware fault)

• Current reading found that the sum of the motor phase current is not zero.

• Cable or motor insulation fault

Check motor and relevant cables.

21Ground fault (software fault)

5 40

Load contact The load switch is open when START is selected.• Faulty operations• Component fault

Reset the fault and restart. If the fault persists, contact your nearest distributor.

Energy MeterOffline

FreecoolingDriven Valve

Blocked (Full Open)

Inverter PumpOFFLINE

OMI Not ConnectedCheck RS485 Line


Fault Code Fault ID Fault name Possible cause Solution

8

600System fault Communication interrupted between control

card and power unit.Reset the fault and restart. If the fault persists, contact your nearest distributor.602 Watchdog reset the CPU

603 Unit auxiliary power voltage too low.

604Phase fault: Output phase voltage does not comply with the reference value

605CPLD fault, but no detailed information available on this fault

606Control unit and power unit software are incompatible

Update software. If the fault persists, contact your nearest distributor.

607Cannot read software version. No software installed in power unit.

Update power unit software. If the fault persists, contact your nearest distributor.

608

• CPU overload. Some software parts (for example, application) caused an overload situation.

• The fault origin was suspended.

Reset the fault and restart.If the fault persists, contact your nearest distributor.

609• Memory access failed.• Maintenance variables could not be restored.

610 Cannot read necessary device properties.

647 Software error Update software. If the fault persists, contact your nearest distributor.648

Use of a function block not valid in the application. System software and application are not compatible.

649

• Resource overload. • Initial setting value upload error.• Setting restore error.• Setting save error.

9

80Under voltage (fault)

DC link voltage under the set voltage limits• Most probable cause: too low voltage• CA inverter internal fault• Defective input fuse• External power switch not closed.Note:This fault only occurs if the inverter is running.

• In the event of temporary blackout, reset the fault and restart the CA inverter.

• Check power voltage. If correct, it means that an internal fault occurred.

• Contact your nearest dealer.

81

Under voltage (alarm)

11 100Output phase supervision

Current reading did not find current on a motor phase.

Check motor and relevant cables.

13

120

Insufficient inverter temperature (fault)

Too low temperature found in heat dissipater or power unit card. Heat dissipater temperature under -10° C.

121

Insufficient inverter temperature (alarm)


Fault Code name

Fault ID Fault name Possible cause Solution

14

130Inverter overheating (fault, heat dissipater)

• Too high temperature found in heat dissipater or power unit card.

• Heat dissipater temperature over 100° C.

• Make sure cooling air quantity and flow are sufficient.

• Make sure there is no dust on the heat dissipater.

• Check ambient temperature.• Make sure switching frequency is

not too high compared to ambient temperature and motor load.

131

Inverter overheating (alarm, heat dissipater)

132Inverter overheating (fault, card)

133Inverter overheating (alarm, card)

15 140 Motor stall Motor stalled. Check motor and load.

16 150Motor overheating The motor is overheating. • Reduce motor load.

• If the motor is not overloaded, check temperature model settings.

17 160 Motor under load Motor subject to under load. Check the load.

22 EEPROM checksum error

25 Motor checksum error

Start angle identification failed. Generic motor control fault.

29Motor temperature thermistor.

34 Internal bus communication

35 Application error

40 390Device unknown Unknown device connected (power unit/

optional card)Device currently unavailable.

41 400IGBT temperature IGBT temperature (unit temperature +

I2T) too high.• Check the load.• Check motor size.• Run identification.

51 1051 External fault Digital input.

52 1052 1352

Panel communication fault

Connection between panel and inverter interrupted

Check the connection and panel cable.

53 1053Field bus communication fault

Data connection between field bus master and card interrupted.

Check installation and field bus master.

54

1354 Slot A fault Defective slot or optional card. Check card and slot.

1454 Slot B fault

1654 Slot D fault

1754 Slot E fault

55 Measured value supervision


Default Value Procedure

Configuration parameters

Parameters SettingsExternal low Temp. Probe No

Pump on with inverter Yes

Energy Power Meter On No

Stand-by unit FC on No

Driven FC valve on No

Water circuit driven valve on No

Pump down on No

Water Pressure on No

Remote Wat. T.Sens. on No

Refr. Liquid Temp. No

Compr.Disch.Temp. On No

Additional Temp. On No

Gas Leakage On No

Low Noise Mode On No

FC Pump Activation On Stand-by On No

Fans Boost Antifr. On No

Ref.Wat.Sensor On No

Setpoint Remote On No

CTRL Head Press Pump Inverter On No

LOW POWER Function On No

Low Power Time Bands On No

Emergency Recovery On No

Summer/Winter compensation on No

Set-back cycle on No

Cyclical pump start on No

Unit time bands on No

Automatic Rotation On No

Alarm Addressing

Parameters SettingsWater Flow A

Water Flow Serious AR

Pump Therm.Switch A

FC Pump Th-Switch A

Antifreeze B

Antifreeze Serious AR

High Ev.Water IN T. B

Low Ev.Water IN T. B

High Pressure AR

Compr.Thermal B

Compr.Thermal Ser. AR

Low Pressure B

Low Press.Serious AR


Expansion Valve Offline A

Expansion Valve Evap.Temper.Sensor A

Expansion Valve EEprom AR

Expansion Valve MOP/LOP LowSSH Prot. A

Expansion Valve EXV Failure A

Unit IN Sensor --

Unit OUT Sensor AR

Ext. Air Sensor B

Water Tank Sensor B

Cond. Press. Sensors A

Evap. Press. Sensors AR

T. Liquid Sensors B

Additional Probe B

Phases Sequence B

Phases Sequence Ser. AR

EEPROM AR

Supply Frequency AR

Wrong Password --

Fan Thermal B

Fan Thermal Serious AR

Fuse Fault A

Pumps Run Hours --

Compr. Run Hours --

LAN Interrupted A

BMS Error --

Heat Recovery Not Possible B

Heat Recovery Locked AR

Water IN/OUT Sensor A

Exp.Board Offline AR

Water Press.Sensors B

Hi/Low Water Press. A

Inverter P. Offline AR

Inv. P. Not Serious B

Inverter P. Serious A

I.G. Offline B

Too Much ChangeOver A

Gas Detector B

Gas Det. Run Months B

Alarm Addressing

Parameters Settings


Remote Control, Supervision

Parameters SettingsI/O command from contact No

I/O command from serial No

E/I command from contact No

Serial address 01

Protocol Standard

Serial speed (1200-19600) 1200

Freecooling Parameters

Parameters SettingsFreecooling mode Standard

Electrical Heaters Parameters

Parameters SettingsMode On: Unit ON

and StandBy

Heat Recovery

Parameters SettingsReference water sensor Outlet

No water flow alarm Yes


Numeric parameters

Parameters U.M. DEF.

Standard summer setpoint °C 7.0

Optional summer setpoint °C 10.0

Max. hysteresis °C 1.6

Standard Winter setpoint °C 45.0

Optional winter setpoint °C 40.0

Max. hysteresis °C 1.6

Minimum summer setpoint °C 6.0

Maximum summer setpoint °C 13.0

Minimum winter setpoint °C 25.0

Maximum winter setpoint °C 50.0

Compensation Parameters


P1 summer: setpoint °C 7.0

P1 summer: external temp. °C 32.0

P2 summer: setpoint °C 7.0

P2 summer: external temp. °C 18.0

P1 winter: setpoint °C 45.0

P1 winter: external temp. °C -5.0

P2 winter: setpoint °C 45.0

P2 winter: external temp. °C 10.0

Alarm Thresholds


Minimum summer water feed temp. °C 5.0

Maximum summer water feed temp. °C 18.0

Minimum winter water feed temp. °C 20.0

Maximum winter water feed temp. °C 58.0

Set-back Cycle


Summer watch setpoint °C 12.0

Winter watch setpoint °C 40.0

Pump ON time in set-back cycle sec 120

Pump operating interval in set-back cycle min 30

AUTO Sum/Win Commutation


Hot ON °C 16.0

Cold ON °C 20.0

Hot commutation delays min 60

Cold commutation delays min 20


Heat Recovery


Set point °C 45.0

Maximum Hysteresis °C 6.0

Fan Speed Setting


Minimum Speed % 15

Maximum Speed Cooling Mode % 100

Maximum Speed Low Noise Mode % 66

Maximum Speed Heat Pump Mode % 100

Total FreeCooling Mode % 100

Fan Speed Reg.(Summer) Parameters


On °C 20.0

Off °C 25.0

Ramp Begin °C 30.0

Ramp Ending °C 45.0

LowNoise (High Ramp) Ramp2 Begin. °C 52.0

LowNoise (High Ramp) Ramp2 Ending °C 58.0

Fan Speed Reg.(Winter) Parameters


On °C 17.0

Off °C 18.0

Ramp Begin °C 16.0

Ramp Ending °C 12.0

Free-cooling Parameters


SetP. DT Water Feed–Ambient °C 3.0

SetP. DT Wat. IN - wat. OUT FC Total °C 5.0


Antifreeze Parameters


Alarm Value (Signal Only) °C 3.0

Trip Value (Off Compress.) °C 2.0

Electrical Heaters Parameters


Ext.Temp. On °C 4.0

Fans Boost Antifreeze Parameters


Set-back Time sec 900

Fan Time ON sec 50

Percent Operating Speed % 30

Heat Recovery Parameters


Cond.Temperature Limit–Switch OFF CMP °C 50.0

Cond.Temperature Limit–Part.Circuit °C 60.0

Cond.Temperature Limit–Alarm °C 63.0

Water Flow FS Alarm FS Start Delay sec 20

Water Flow FS Alarm FS Run Delay sec 10

Defrost Parameters


P.evap.Dt.rec. °C -5.0

P.evap.Dt.Res. °C -3.0

Dt Reset Time min 6

DT.Reduct.SetP. % 15

Def.End.SetP. °C 58.0

Off Before Def. sec 0

Off After Def. sec 120

Def.Max.time min 5

DT.Reduct.SetP. % 15

Pump Inverter Parameters


Speed Request % 100

Al.Max Speed % 100

Set Head Press.KPa kPa 15.0

Prop.Band 100

Int.Time sec 120

Der.Time sec 0


Water Alarm Parameters


Hi P. Alarm kPa 600

Low P. Alarm kPa 50

Hysteresis kPa 10

Power Supply Settings


Thresh. Failure V 20.0

I.G. Time Ch.Over sec 10

Max IG Change/h n 4

UCAP Recharge Time sec 600

UPS Delay Work Alarm sec 10

Emergency Recovery


Twout > SetP+ °C 6.0

Power OFF Time sec 0

Maximum Em. Rec. Time sec 0

Timed ON sec 10

DT Rated Water °C 0.0

Delay Settings


Power On Delay sec 0

Start Trans. sec 20

Temp.Al.Delay min 15

FS Start Delay sec 10

FS Run Delay sec 03

Pump Changeover h 12

Compressor Timing


Cycle Minimum sec 360

Minimum Run Time sec 180

Minimum Off Time sec 60

Between 2 diff. sec 75

Betw.2 diff.min. sec 30

F.C. K Multipl. sec 20

LP-Start Delay sec 90

LP-Run Delay sec 10


Offset Adjustment


Adjustment °C 0.0

Water Flow Alarm Parameters


Max Alarm/Hour n 1

Time Reset sec 60

Remote Setpoint


Zero Adj. mV 0.0

0-10V Signal °C 5.0

Low Power


SetP. Absorbed Power Limit kW 200

SetP. Absorbed Current Limit A 200

PID SetP. Absorbed Power Limit kW 200

PID SetP. Absorbed Current Limit A 200

Proportional Band 10.0

Integral Time sec 0

Sensor Range


Begin Compress. Current Reading Range A 0

End Compress. Current Reading Range A 100

Maximum Absorbed Current A 137

Begin High Pressure Range kPa 0

End High Pressure Range kPa 5000

Begin Low Pressure Range kPa 5

End Low Pressure Range kPa 3447

End Water Pressure Range kPa -050

Begin Water Pressure Range kPa 700

Buzzer


Activation Time min 5

Password


Password Settings n 00000

Password Service n *****


Technical Data

Refrigerant ContentNOTE: Quantities may vary slightly due to adjustments made during end-of-line testing.

NOTE: Quantities may vary depending on unit configuration.

Water Circuit CapacityThe table below shows the capacity (liters) of the water circuit in basic units (“cooling only” and “heat pump”).

NOTE: Data refers to standard units without pump group.

The table below shows the capacity (liters) of the water circuit in basic units (“free-cooling”).

NOTE: Data refers to standard units without pump group or tank.

Recommended plant capacity

The table below shows the recommended minimum plant capacity for units without a water tank inside the unit

or an optional water tank capacity.

ISAC/F and ISCC/F

Model 0621A 0921A 1221A

Circuit (kg) 9.3 12.7 18.2

ISAH/ISCH

Model 0621A 0921A 1221A

Circuit (kg) 10.0 13.0 21.5

ISAC/H and ISCC/H

Model 0621A 0921A 1221A

Evaporator (l) 3.1 4.8 6.2

Expansion vessel (l) 5 5 8

ISAF/ISCF

Model 0621A 0921A 1221A

Evaporator (l) 3.1 4.8 6.2

Expansion vessel (l) 5 5 8

Free-cooling coils (l) 12 16 26

ISAC/H/F and ISCC/H/F

Model 0621A 0921A 1221A

Recommended minimum plant capacity (l) 135 240 300


Maximum Operating Hydraulic Pressure

Compressor Oil

Safety Device CalibrationThe operating parameters set on the microprocessor-control are provided in the attached instruction manual. The table below shows the calibration of the safety devices; this information can also be found on the data plate affixed to the unit.

The table below contains information about the safety devices.

See “Operation” on page 6 for the operating parameters set on the microprocessor-control.

This information is available on the data plate affixed to the unit.

Maximum Operating Pressure of the Hydraulic Circuit P0

barg 6

Type of Refrigerant Type of Oil

R410A Danfoss 160SZ: polyester oil

ISAC/H/F and ISCC/H/F

Model 0621A 0921A 1221A

Kg 3.0 5.5 7.0

Component Available Temperature Swing Reset Reset

High-pressure SwitchCircuit 1-2 barg 45 -- Manual

Low-pressure Switch Circuit 1-2 barg 1.5 1 2.5

Component Calibration Available Temperature Swing Reset

High-Pressure Circuit 1-2 barg 6 -- --


Troubleshooting

Problem Possible Cause Check/Corrective Action

Unit does not start

No power supply to the electrical panel.Check that there is voltage present.

Check whether the mains switch is switched off.

The basic control board is not powered.

Check whether the automatic IM8 switch on the auxiliary circuits is armed.

Check whether the board fuse has tripped.

The board is powered but it does not activate machine operation.

Check for the presence of alarm statuses.

High Delivery Pressure or High-pressure Switch Intervention

The air flow to the condenser is insufficient or the inlet temperature is too high.

Check for the presence of any condensing air recirculation and whether the instructions provided in the paragraph entitled ‘Positioning the chiller’ have been observed.

Check whether the air temperature is within the operating values envisaged for the machine.

Check whether the batteries and metal filters are dirty.

Check the direction of rotation of the fans.

The condensing pressure control system is inefficient.

Check the calibration and operation of the speed regulator.

One or more fans is out of order.Check whether the power fan protection has intervened.

Repair or replace broken fans.

Presence of non-condensable (air) in the circuit, which can be detected through the presence of bubbles despite measuring a high level of sub-cooling.

Empty and refill the circuit.

Circuit filled with too much refrigerant, condenser partially flooded

The sub-cooling of the liquid at the condenser outlet is excessive, remove some refrigerant from the circuit.

Condenser or metal filters dirtyRemove the material clogging the condenser (leaves, paper, etc.).

High suction pressureCheck the return temperature of the chilled water and the values set in the control.


Low Delivery Pressure or Low-pressure Switch Intervention

Thermostatic valve incorrectly calibrated or faulty.

Check whether the super-heating of the thermostatic valve is correct (approx. 5°C).

Dryer filter cartridge dirty

Check whether the dryer filter cartridge needs replacing; the difference in temperature measured upstream and downstream of the filter must be less than 2°C.

In cold outdoor climates, the low pressure switch intervenes before the cooling circuit stabilises.

Set the low pressure switch inhibition time at start-up to 120 seconds.

Insufficient quantity of refrigerant

Check whether there is a possible leak and top-up until you measure a sub-cooling of the liquid at the condenser outlet of 3÷5°C.

Insufficient water flow rate (high difference between the inlet and outlet temperatures of the chilled water)

Check the characteristics of the pump and the piping pressure loss.

The Anti-freeze Device Intervenes

The outlet temperature of the chilled water is too low.

Check whether the water flow rate is sufficient and whether the difference between the water inlet and outlet temperatures is not too high.

The calibration of the anti-freeze alarm is incorrect or the sensor is incorrectly calibrated.

Check the calibration of the alarm on the control.

The Compresor Doesn’t Work Despite Being Called by the Thermostat

One of the machine's safety devices has intervened.

Check whether there are any alarms on the user terminal display.

The short-circuit protection intervened.Check the cause of the short-circuit and reset the RCBO switch.

One of the safety devices intervened (low pressure switch or low delivery pressure, anti-freeze safety device).

See paragraphs: “Low Delivery Pressure or Low-pressure Switch Intervention” , “High Delivery Pressure or High-pressure Switch Intervention” , “The Anti-freeze Device Intervenes” .

The control system does not emit the correct signal.

Check the control system.

The flow switch does not provide consent at compressor start-up.

Check the water flow as well as the operation of the flow switch and pump.

The Internal Compressor Protection Intervenes

Note:Before starting the compressor check the heating element and continuity of the compressor windings

Phase missingCheck the electrical connections on the compressor.

Motor overload Check whether the power supply voltage is too high or too low .

Rotor locked Replace the compressor.

The Compressor is Noisy

Liquid is flowing back into the compressor.

Check the operation and the super-heating of the expansion valve.

The compressor has been damaged.Call your nearest service center to have the compressor replaced.


Low Delivery Pressure

The condensing pressure control system is inefficient.

Check the operation of the fan speed regulators.

Check the operation of the air temperature sensor.

The chiller works with an outdoor temperature that is too low.

Check whether the machine is working within the temperature values envisaged.

High Suction Pressure

Return temperature of the chilled water is higher than the normal value.

Check whether the machine is working within the temperature values envisaged.

Refrigerant liquid is flowing back into the compressor.

Check the operation of the thermostatic valve.

Check whether the super-heating of the thermostatic valve is correct (approx. 5°C).


Default Values Update and Protocol Variables

In order to access the latest release of default values and get the protocol variables, check the Schneider Electric webcard portal.

The procedure for getting an account is the following:

1. Open Internet Explorer® browser (release 6.0 or later) and enter the following address: http://webcard-it.schneider-electric.com/activation.asp

2. Enter your personal mail address and company name, then click on Activation Code.You will automatically receive an email with your account details.

3. Open your Internet Explorer browser (release 6.0 or more) and enter the following address: http://webcard-it.schneider-electric.com/

4. Enter your login and password and access the reserved area to find the updated releases for default values and protocol variables.


Maintenance

Safety During Maintenance WorkAll work must be carried out by field service engineers that have been qualified and trained on Schneider Electric cooling products.

RefrigerantThese units are pre-filled at the factory and do not need to be filled with refrigerant unless problems occurred during transportation and installation or in the event of safety valve intervention. If necessary, fill the refrigerant according to the following instructions.

If the circuit has been emptied to replace certain components or for safety valve intervention, the circuit must be emptied first.

Creating a vacuum in the circuit

Connect the vacuum pump to the compressor suction and delivery valves and empty the system to a vacuum level of 500 absolute Pa (3.75 mm Hg); remember that it is a good idea to achieve a vacuum in a relatively slow time frame (at least 120 minutes).

Wait for a “rising time” of 100 seconds and make sure the pressure has not exceeded 200 absolute Pa.

Filling with refrigerant

These units must be filled with refrigerant fluid in the liquid phase through the pin valve situated between the thermostatic expansion valve and the evaporator, until any gaseous bubbles disappear from the liquid indicator.

The refrigerant must be filled in nominal conditions and with a delivery pressure of 10.5–12.0 bar (43–48°C).

Check the data plate for the quantity of refrigerant contained in the circuit, that the temperature of the liquid at the thermostatic valve inlet is between 5° and 10° C less than the condensation temperature read on the pressure gauge scale and that the super-heating is between 5 and 8°C.

NOTE: Before filling with R410A, check that there are no bubbles in the liquid indicator.


Turn off all power supplying this equipment before working on the equipment. All electrical work must be performed by qualified personnel. Practice Lockout/Tagout procedures. Do not wear jewelry when working with electrical equipment.


WARNINGHAZARD FROM MOVING PARTS

Keep hands, clothing, and jewelry away from moving parts. Check the equipment for

foreign objects before closing the doors and starting the equipment.

Failure to follow these instructions can result in death, serious injury, or

equipment damage.


Check the Compressor Oil LevelThe oil level in compressors should be between the minimum and maximum inspection indicators.One of the compressors has the inspection light while the other has a level sensor that generates an alarm when a low oil level is detected.

See “Compressor Oil” on page 71 for more information.

na58

87a

MINIMUM

MAXIMUM

OIL LEVEL SENSOR

OIL LEVEL INDICATOR


Double Power Supply

When the unit is fitted with a double power supply managed by an automatic switch-over driven switch, the switch does not have external operation.

IMPORTANT: Before opening the front panel to access the electrical panel, stop the unit from the display interface according to the instructions provided in the Operation and Maintenance Manual.

The compressor timings must be observed during the swap between the two electricity supply lines. In the absence of voltage on line A (main electricity supply), line B (emergency line) must be kept active for at least six minutes before switching back to line A when the voltage returns. Prepare a dedicated device (under the responsibility of the customer) at the place of installation.

Opening the front panel with the unit in operation causes a micro-switch to trip, which immediately stops the unit. In this case, the switch-off timings envisaged by the control software will not be observed.

With the machine stopped and with the electrical panel door open, there is only voltage upstream of the disconnecting switch. In the event of maintenance work, to have voltage throughout the electrical panel, you will need to set the key operated selector switch to ON; depending on the model, this key-operated selector switch may be installed on the left-hand post of the unit or underneath the electrical panel.

IMPORTANT: Once the maintenance work has been completed, restore automatic operation.


• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462.

• This equipment must be installed and serviced by qualified personnel only.

• Turn off all power supplying this equipment before working on or inside the equipment.

• Always use a properly rated voltage sensing device to confirm power is off.

• Replace all devices, doors, and covers before turning on power to this equipment.



The compressor timings must be observed during the swap between the two power supply lines.



Only use the selector switch for maintenance work. When completed, restore automatic operation.



Low External Air Temperature

Units with free-cooling

Air-cooled water chillers with free-cooling systems must be filled with an anti-freeze mixture.

Units without free-cooling

Drain all water from the system before the winter season to avoid freezing. In periods when the outdoor temperature falls below 0°C, empty the unit in order to avoid serious damage caused by the formation of ice. This precaution is not necessary if the unit is filled with a suitable anti-freeze mixture.

If the unit is equipped with an optional heating cable, it must be turned off without disconnecting the main power supply.

Scheduled Maintenance Guidelines

Quarterly ChecksPerform the following checks every three months:

NOTICEHAZARD TO PERSONNEL

Where a winter shut-down is envisaged, you need to empty out the hydraulic circuit and add the necessary quantity of glycol to any water remaining inside the machine.


NOTICEHAZARD TO PERSONNEL

Periodic inspection of the free-cooling hoses (if equipped) for leaks and potential problems is recommended.


Check the mains voltage.

Check the alarm status .

Check the operating temperatures and pressures.

Check the local and/or remote control operation .

Check and possibly clean the condensation, free-cooling battery/ies and any metal pre-filters.


Semi-annual ChecksPerform the following checks every six months:

Annual ChecksPerform the following checks every twelve months:

Other ChecksPerform the following checks every 60 months (five years):

Check the fastening and operation of condensation fans.

Check the correct water flow rate by measuring the fluid temperature difference.

Check the fastening, the operation and the current absorption of the circulation pump(s) on the machine.

Check the level of dirt in the water filter and clean if necessary.

Check that the paintwork and bolts are all intact.

Check the condition of the hinges, hinge plates and seals.

Check the wiring on the electrical circuits.

Tighten all terminals.

Check and if necessary adjust the calibration of the safety devices (pressure switches, thermostats, flow switches, protections).

Check the flanges and/or the Victaulic couplings.

Check the fastening, operation and current absorption of the compressor(s).

Check for gas leaks and if necessary restore the tightness of the refrigerant circuit(s) and the tightness of couplings and fittings on the machine.

Check and if necessary top-up the refrigerant gas and/or oil fill.

Check and if necessary adjust the calibration of the adjustment devices.

Check the tightness of the water couplings and of the internal fittings and if necessary restore the tightness.

Check the tightness of any adjustment and/or water shut-off valves on the machine.

Check the glycol concentration and top up if necessary.

Check and if necessary replace the gas filters.

Check and if necessary replace the oil in the compressor(s).


Worldwide Customer SupportCustomer support for this or any other product is available at no charge in any of the following ways:

• Visit the Schneider Electric Web site to access documents in the Schneider Electric Knowledge Base and to submit customer support requests.

– www.schneider-electric.com (Corporate Headquarters)Connect to localized Schneider Electric Web sites for specific countries, each of which provides customer support information.

– www.schneider-electric.com/support/Global support searching Schneider Electric Knowledge Base and using e-support.

• Contact the Schneider Electric Customer Support Center by telephone or e-mail.

– Local, country-specific centers: go to www.schneider-electric.com > Support > Operations around the world for contact information.

For information on how to obtain local customer support, contact the representative or other distributors from whom you purchased your product.

As standards, specifications, and designs change from time to time, please ask for confirmation of the information given in this publication.© 2016 Schneider Electric. All Rights Reserved.Uniflair and the Schneider Electric logo are trademarks owned by Schneider Electric Industries SAS S.A.S., or its affiliated companies. All other trademarks are the property of their respective owners.

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