Carrier PRO-DIALOG 30GK User Manual

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30GK Series PRO-DIALOG Control

Air-Cooled Liquid Chillers 50 Hz

Installation, operation and maintenance instructions

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TABLE OF CONTENTS

1 - SAFETY CONSIDERATIONS..................................................................................................................................................4

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

1.2 - Avoiding electrocution.........................................................................................................................................................4

2 - GENERAL DESCRIPTION ......................................................................................................................................................5

2.1 - General .................................................................................................................................................................................5

2.2 - Abbreviations used ...............................................................................................................................................................5

3 - HARDWARE DESCRIPTION....................................................................................................... ...........................................6

3.1 - General .................................................................................................................................................................................6

3.2 - Electronic boards ..................................................................................................................................................................6

3.2.1 - The basic board ............................................................................................................................................................6

3.2.2 - Slave boards .................................................................................................................................................................6

3.2.3 - The user interface.........................................................................................................................................................7

3.2.4 - Connections between boards .......................................................................................................................................7

3.2.5 - Slave board addresses ..................................................................................................................................................7

3.2.6 - Power supply to the boards ..........................................................................................................................................7

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

3.3 - The controls ..........................................................................................................................................................................7

3.3.1 - Electronic expansion valve (EXV)..............................................................................................................................7

3.3.2 - The head pressure controls ..........................................................................................................................................7

3.3.3 - The evaporator pumps .................................................................................................................................................8

3.3.4 - The condenser pump....................................................................................................................................................8

3.3.5 - Pressure sensors ...........................................................................................................................................................8

3.3.6 - Thermistors ..................................................................................................................................................................8

3.4 - User connections ..................................................................................................................................................................9

4 - SETTING UP PRO-DIALOG PLUS CONTROL .................................................................................................................10

4.1 - Local interface general features..........................................................................................................................................10

4.2 - Unit start/stop control .........................................................................................................................................................11

4.2.1 - Description.................................................................................................................................................................11

4.2.2 - Stopping the unit in local mode ................................................................................................................................. 11

4.2.3 - Starting unit and selecting an operating type.............................................................................................................11

4.3 - Menus .................................................................................................................................................................................12

4.3.1 - Selecting a menu ........................................................................................................................................................12

4.3.2 - Selecting a menu item................................................................................................................................................12

4.3.3 - Modifying the value of a parameter/access to a sub-menu........................................................................................12

4.3.4 - Expand display...........................................................................................................................................................12

4.4 - General menu structure.......................................................................................................................................................13

4.5 - Menu tree structure.............................................................................................................................................................14

4.5.1 - Description of the Information menu.........................................................................................................................15

4.5.2 - Description of the Temperatures menu......................................................................................................................16

4.5.3 - Description of the Pressures menu.............................................................................................................................16

4.5.4 - Description of the Setpoints menu.............................................................................................................................17

4.5.5 - Description of the Inputs menu..................................................................................................................................18

4.5.6 - Description of the Outputs/Tests menu .....................................................................................................................18

4.5.7 - Description of the Configuration menu .....................................................................................................................20

4.5.8 - Description of the Alarms menu ................................................................................................................................25

4.5.9 - Description of the Alarms History menu ...................................................................................................................25

4.5.10 - Runtime menu description .......................................................................................................................................26

The cover photograph is solely for illustration, and forms no part of any offer for sale or any sale contract. The manufacturer reserves the right to change the design at any time without notice.

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5 - PRO-DIALOG PLUS CONTROL OPERATION .................................................................................................................27

5.1 - Start/stop control ................................................................................................................................................................27

5.2 - Heating/cooling selection ...................................................................................................................................................27

5.3 - Evaporator water pump control ..........................................................................................................................................28

5.4 - Condenser water pump control...........................................................................................................................................28

5.5 - Control interlock contact ....................................................................................................................................................28

5.6 - Evaporator heater control ...................................................................................................................................................28

5.7 - Control point......................................................................................................................................................................28

5.7.1 - Active setpoint ...........................................................................................................................................................28

5.7.2 - Reset...........................................................................................................................................................................28

5.8 - Demand limit ......................................................................................................................................................................29

5.9 - Capacity control ................................................................................................................................................................29

5.10 - Determining the lead circuit............................................................................................................................................29

5.11 - Circuit loading sequence..................................................................................................................................................29

5.12 - Slave compressor start-up sequence ................................................................................................................................30

5.13 - Controlling the EXV ........................................................................................................................................................30

5.14 - Head pressure control on air-cooled units .......................................................................................................................30

5.15 - Head pressure control on water-cooled units...................................................................................................................30

5.16 - Active setpoint selection ..................................................................................................................................................30

5.17 - High pressure load shedding function..............................................................................................................................31

5.18 - Pumping down..................................................................................................................................................................31

5.19 - Master/slave assembly .....................................................................................................................................................31

5.20 - Controlling Pro-Dialog Plus units with a System Manager.............................................................................................31

5.21 - Optional heat reclaim module ..........................................................................................................................................32

6 - DIAGNOSTICS - TROUBLESHOOTING ............................................................................................................................32

6.1 - General ...............................................................................................................................................................................32

6.2 - Displaying alarms ...............................................................................................................................................................32

6.3 - Resetting alarms .................................................................................................................................................................32

6.4 - Alarm codes........................................................................................................................................................................33

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1 - SAFETY CONSIDERATIONS

1.1 - General

Installation, start-up and servicing of equipment can be hazardous if factors particular to the installation are not considered: operating pressures, electrical components, voltages and the installation site itself (elevated plinths, rooftops and built-up structures).

IMPORTANT: Risk of electrocution: Even when the main power isolator or circuit breaker is off, it is still possible for certain components such as crankcase heaters and trace heaters to be energised, since they are connected to a separate power source.

Even when the unit is switched off, the power circuit remains energised, as long as the unit or circuit disconnect is not open. Refer to the wiring diagram for details.

Only highly trained and qualified installation engineers and technicians, who are fully trained on the product, are authorised to install and start up this equipment.

During all servicing operations, it is important to read, understand and follow all the recommendations and instructions given in the installation and service instructions for the product, including the tags and labels affixed to the equipment, components and any parts supplied separately, and to comply with all other relevant safety regulations.

• Apply all safety codes and practices.

• Wear safety glasses and gloves.

• Use the proper tools to move heavy objects. Move units carefully and set them down gently.

1.2 - Avoiding electrocution

Only personnel qualified in accordance with the recommendations of the IEC (International Electrotechnical Commission) may be permitted access to electrical components. It is particularly recommended that all sources of electricity to the unit be shut off before any work is begun. Shut off the main power supply at the main circuit breaker or isolator.

Attach appropriate safety labels.

Risk of burns: Electrical currents cause components to get hot either temporarily or permanently. Handle power cables, electrical cables and conduits, terminal box covers and motor frames with very great care.

IMPORTANT: This equipment uses and emits electromagnetic signals. The tests carried out on this product have shown that it complies with all applicable codes regarding electromagnetic compatibility.

IMPORTANT : If the boards need to be handled wear antistatic gloves to avoid exposing the electronic components to a destructive voltage. Only unpack the boards from their antistatic bag when they need to be installed.

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2 - GENERAL DESCRIPTION

2.2 - Abbreviations used

2.1 - General

PRO-DIALOG Plus is a system for controlling units which use reciprocating compressors*:

• Single or dual circuit

• Air or water-cooled condensers

• Non-reversible heat pumps

• Split systems

* At present only air-cooled models are available.

PRO-DIALOG Plus controls compressor start-up and demand limits needed to maintain the desired entering or leaving temperature setpoint for water. It automatically sets the position of the electronic expansion valve (if used) to optimise the evaporator charge. It controls operation of the fans (on air-cooled units) or water valves (on water-cooled units) to maintain the correct head pressure in each circuit.

Safety circuits are constantly monitored by PRO-DIALOG Plus to ensure safe operation of the unit. PRO-DIALOG Plus also gives access to a Quick Test program covering all inputs and outputs.

All PRO-DIALOG Plus controls can work in accordance with three independent modes:

• Local mode: the machine is controlled by commands from the user interface.

• Remote mode: the machine is controlled by remote contacts (volt-free contacts, analogue signals).

• CCN mode: the machine is controlled by commands from the Carrier Comfort Network (CCN). In this case a data communication cable is used to connect the unit to the CCN communication bus.

In this manual the circuits are called circuit A and circuit B. The compressors in circuit A are labelled A1, A2, A3 and A4. Those in circuit B are labelled B1, B2, B3 and B4. A1 and B1 are the lead compressors.

The following abbreviations are frequently used: AI - Analogue Input AO - Analogue Output CCn - Operating type: CCN CCN - Carrier Comfort Network.

This is the Carrier communication network DI - Discrete Input DO - Discrete Output EXV - Electronic Expansion Device LED - Light Emitting Diode LOFF - Operating type: Local off L-ON - Operating type: Local operation MASt - Master unit operating type (master/slave assembly) RCPM - Reciprocating Compressor Protection Module rEM - Operating type: by remote control contacts SCT - Saturated disCharge Temperature SIO - Standard Input/Output - internal communication bus

linking the basic board to the slave boards SST - Saturated Suction Temperature

The operating mode must be chosen with the Operating Type selection button described in section 4.2.1.

When the PRO-DIALOG Plus system operates autonomously (Local or Remote mode) it retains all of its own control capabilities but does not offer any of the features of the CCN network.

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3 - HARDWARE DESCRIPTION

3.1 - General

Control board

Legend

1 CCN connector 2 Red LED, status of the board 3 Green LED, communication bus SIO 4 Orange LED, communication bus CCN 5 Remote master board customer control connection contacts 6 Remote master board customer control connection signal 7 Remote master board customer report connection contacts 8 Master PD4 basic board 9 CCN/clock board

The control system consists of at least a PD4 basic board, a user interface, a PD4-EXV slave board and, depending on the application, one or more RCPM compressor boards, 4xDO boards or 4xAI-2xAO boards and an NRCP-BASE slave board. Slave boards are connected to the basic board via an internal communication bus (SIO).

The CCN/clock board is connected and screwed to the master basic board. It permits communication with elements of the Carrier Comfort Network via the CCN bus.

The various control components are arranged in modules within the control cabinet:

• Control module: This comprises the basic board, the

user interface, the EXV control board and option boards, as well as the customer’s terminal block.

• Start-up module: This consists of the start-up boards,

compressor protection boards, as well as the compressor circuit breakers and contactors.

• Fan module (air-cooled unit): Consists of one or two

4xDO boards together with the fan circuit breakers and contactors.

3.2 - Electronic boards

3.2.1 - The basic board

It can be used alone or in conjunction with slave boards. It holds the program that controls the machine. It continuously manages the information coming in from the various pressure and temperature sensors, and communicates with the slave boards via the SIO bus. It can also communicate with elements of the Carrier Comfort Network via the CCN bus.

NOTE: After a power cut the unit restarts in the same operating mode as before the power cut.

3.2.2 - Slave boards

• Compressor board RCPM: This board is used to control

a compressor. Up to eight RCPM boards can be connected to the basic board.

• 4xDO board: This board can be used to control fan stages.

• PD4-EXV board: This board can control two EXV valves

and two suction temperature sensors.

• 4xAI-2xAO board: This optional board can be used to

read sensors (oil pressure), or to control variable speed fans (air-cooled units) or the condenser valve (water-cooled units).

• NRCP-BASE board: This optional board is used to control

the inputs and outputs of the heat reclaim option.

Legend

1 Power supply disconnect switch 2 Fan start-up module

Control box

3 Compressor start-up module 4 Control system 5 User interface

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3.2.3 - The user interface

The user interface is in two parts:

• The main interface: This gives access to all of the

control parameters for the unit. It consists of a 2-digit primary display block and a secondary 4-digit display block with 10 LEDs and 5 buttons.

• The summary interface: This gives quick access to just

the main control parameters for the unit. It comprises 12 buttons and 16 LEDs, and includes a schematic diagram of the unit.

3.2.4 - Connections between boards

The basic board and slave boards communicate with each other over an internal three-wire RS485 communication bus (SIO bus). These three wires link all the boards in parallel.

Terminals 1, 2 and 3 on connector J9 (A, B, C are connected internally) of the basic board are connected to terminals 1, 2 and 3 of terminal J9 of the NRCP-BASE board, terminal J4 of the PD4-EXV board respectively, except for terminal J3 of the 4xDO and 4xAI-2xAO boards where terminals 2 and 3 are reversed.

Incorrect connection will render the system inoperative.

3.2.5 - Slave board addresses

Every slave board (except the NRCP-BASE board) has a unique address controlled by 8 DIP switches. The switch is disabled when it is in the open position (OPEN or OFF). On RCPM boards SIO address switch is labelled 'ADDR'.

3.2.7 - Light emitting diodes on boards

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

Red LED

• The MAIN red LED flashes at about 2 second intervals to show that the module is working properly.

• Irregular flashing or no flashing is a sign of a defective board.

Green LED

(item SIO on the board)

• This LED flashes continuously to show that the board is communicating correctly over its internal bus.

• If this LED is not flashing, check the wiring of the SIO bus and the address of the board (slave board only). If the basic board is not linked to any slave boards, this LED should not flash.

• If all slave boards indicate a communication fault, check the SIO bus connection on the basic board. If this connection is correct and the fault persists, replace the basic board.

Orange LED - CCN/clock board

• This LED flashes to show that the basic board is communicating via the CCN bus.

NOTE: Any incorrect address will prevent the unit from starting. Turn off the power before amending the address of any auxiliary board.

Board addresses

Board Address switch

87654321

PD4-EXV 0 0 011101 4xDO Fan board # 1 0 0 100111 4xDO Fan board # 2 0 0 101011 4xAI-2xAO board # 1 0 0 101111 4xAI-2xAO board # 2 0 1 111000 RCPM # 1 (compressor A1) 1 1 010100 RCPM # 2 (compressor A2) 1 1 011111 RCPM # 2 (compressor A3) 1 1 011001 RCPM # 2 (compressor A4) 1 1 100100 RCPM # 3 (compressor B1) 1 1 101010 RCPM # 4 (compressor B2) 1 1 110101 RCPM # 4 (compressor B3) 1 1 101111 RCPM # 4 (compressor B4) 1 1 110010

3.2.6 - Power supply to the boards

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

NOTE: When connecting the power supply for the boards, maintain polarity.

3.3 - The controls

3.3.1 - Electronic expansion valve (EXV)

The EXV is used to adjust the refrigerant flow to changes in the operating conditions of the machine. For this purpose, a series of calibrated orifices are machined into the wall of the refrigerant inlet port. As the refrigerant passes through these orifices, it expands and becomes a bi-phase mixture (liquid and gas).

T o adjust the refriger ant flow to changes in operating conditions, a piston moves constantly up or down to vary the cross-section of the refrigerant path. This piston is driven by an electronically controlled linear stepper motor. The high degree of accuracy with which the piston is positioned ensures that the flow of refrigerant is precisely controlled.

NOTE: The external connector of the EXV must be cleaned and coated with silicone grease (Part No. 397 EE) to keep out condensation and prevent corrosion.

3.3.2 - The head pressure controls

The controller can deal with the following:

• in the case of air-cooled units, for each circuit, fan stages together with, if necessary, a variable speed fan (controlled by an optional 4xAI-2xAO board)

• in the case of water-cooled units, a water valve. This valve is controlled by an optional 4xAI-2xAO board which can deliver a 0-10 V d.c. or 4-20 mA signal, depending on the configuration.

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3.3.3 - The evaporator pumps

The controller can regulate one or two evaporator pumps, with automatic changeover between the two pumps.

3.3.4 - The condenser pump

In appropriate cases the controller can regulate a condenser pump (for water-cooled units or air-cooled units with heat reclaim option). This control does not require an additional board.

3.3.5 - Pressure sensors

These are used to measure the following pressures in each circuit:

• Discharge gas pressure (high pressure type)

• Suction pressure (low pressure type)

• Oil pressure (option)

These electronic sensors deliver 0 to 5 V d.c. to the main board or to a 4xAI-2xAO slave board. Two sensor versions are used; one is calibrated for high pressure and the other for low pressure and oil pressure.

Discharge pressure sensors

These are on the high pressure side of the lead compressor in each circuit. They replace the usual discharge gas pressure gauges and can be used to control head pressure or by the high pressure load shedding option.

Oil pressure sensors

If installed, these sensors are used to measure the compressor oil pressure on the oil pressure discharge side. The suction pressure is subtracted from the oil pressure value to arrive at the differential oil pressure.

Suction pressure sensors

They are located in the low-pressure side of the unit on the lead compressor of each circuit. The suction pressure sensor reading is used to control the electronic expansion devices EXV. They permit replacement of the low-pressure switches, low-pressure gauges and possibly of the oil pressure safety switch.

3.3.6 - Thermistors

These all have similar characteristics.

Evaporator entering water temperature sensor

The evaporator entering water temperature sensor is installed in the evaporator wall in the free space at the side of the tube bundle.

Evaporator leaving water temperature sensor

The evaporator leaving water temperature sensor is installed in evaporator leaving water piping: The sensor bulb is directly immersed in the water.

Compressor suction sensor

This is located in the lead compressor of each circuit in the suction gas line situated between the motor and the cylinders above the oil pump.

Condenser entering and leaving water temperature sensors

These are used to control the heating capacity on heat pumps. In cooling only units they have no control function. They are installed in the common condenser entering and leaving line.

Heat reclaim condenser entering/leaving water temperatures

These sensors measure the entering and leaving water temperatures of heat reclaim condensers and are used on air-cooled units equipped with the heat reclaim option. If not, they may be fitted as options. In this case they only have informative character.

Temperature setpoint reset sensor

This is an optional 0-10 V sensor which can be installed remotely from the unit. It is used to reset the cooling and heating setpoint on the unit as a function of either the outdoor air temperature or ambient room temperature. The sensor is not supplied by Carrier, and must be configured by the User Menu.

Outdoor temperature sensor

Mounted on the control box. It is used for start-up, setpoint temperature reset and frost protection control.

Master/slave assembly temperature control

The optional water temperature sensor can be used for master/ slave assembly control.

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3.4 - User connections

The connections below are available at the customer’s terminal block. Some of them can only be used in special operating modes. For further details see the sections that describe the functions (section 5) and the configurations (section 4.2.1).

NOTE: The bridge between terminals 32, 63 and 65 on the customer’s terminal block must not be removed.

CONNECTION BLOCK

DESCRIPTION

Alarm relay output, circuit A Alarm relay output, circuit B

User safety loop and chilled water pump interlock

Remote start/stop

Remote cooling setpoint selection

Remote heating/cooling control or

remote heat reclaim control

Demand limit command

0-10 V d.c. setpoint reset or demand limit entry

Connection to CCN

CONNECTOR/CHANNEL

J3 / CH24 J3 / CH25

J4 / CH15a

J4 / CH11

J4 / CH12

J4 / CH13

J4 / CH14

J8 / CH10

J12

TERMINAL

30A - 31A 30B - 31B

34 - 35

32 - 33

65 - 66

63 - 64

73 - 74

71 - 72

1 - 2 - 3

DESCRIPTION

Indicates alarms in circuit A Indicates alarms in circuit B

This contact is mounted in series with the water flow control contact. It can be used for any user safety loop that requires that the unit is shut down, if it is open. The chilled water pump operation auxiliary contact is connected between these two terminals.

The remote start/stop command is only used if the unit is under remote operation control (rEM). See section 4.2.1.

The remote cooling setpoint selection command is only used if the unit is under remote operation control (rEM). See section 4.2.1.

The remote heating/cooling control command is only used if the unit is under remote operation control (rEM). See section 4.2.1.

The command allows selection of the second condensing setpoint or of the heat reclaim mode. It is only used if the unit is under remote operation control (rEM). See section

4.2.1. This contact permits activating the unit demand limit

function. See section 5.8. This contact is active, whate v er the operating type.

This 0-10 V d.c. input is used for setpoint reset or unit demand limit. It is active, whatev er the unit operating type . This 0-10 V signal can be supplied by a user command or a 0-10 V temperature sensor.

A RS-485 bus is used for connection to the CCN. The CCN connector is located on the CCN/clock board (inserted on the PD4 Basic Board)

- Pin 1: signal +

- Pin 2: ground

- Pin 3: signal -

REMARKS

Volt-free contacts 24 V a.c. 48 V d.c. max, 20 V a.c. or V d.c., 3 A max, 80 mA min, external power supply .

Connector: 6 pin WA GO 231-306/026000 pitch 5.08.

24 V a.c., 20 mA Connector: 10 pin WAGO

734-110, pitch 3.5

Connector: 2 pin WAGO 231302/026000 pitch 5.08

Use of a shielded cable (max. length: 1000 m) Shielding: braiding on 95% 100% of the cable surface. Shielding connection at the two cable ends.

AVAILABLE TERMINALS

Description

Condenser water flow switch input

Evaporator 1 and 2 pump operation input

Evaporator 1 control Evaporator 2 control Condenser pump control

Legend

* Associated functions, if selected: automatic changeover, pump 1 and 2; manual or CCN selection; periodical; by default.

Connector/ channel

J5/CH17

J5/CH18

J2/CH19 J2/CH20 J2/CH21

Terminal Description

This contact is used to detect lack of condenser water flow and shuts down the unit.

This contact is used to detect an evaporator pump operation fault and switches over to the other evaporator pump*.

This contact permits control of evaporator 1 pump by the unit*. This contact permits control of evaporator 2 pump by the unit*. This contact permits control of condenser pump by the unit*.

Remarks

24 V a.c - 20mA

24 V a.c. internal supply. Max. consumption

- each output: 20 VA/10W

- for all 3: 40 VA/20 W if all are used

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4 - SETTING UP PRO-DIALOG PLUS CONTROL

4.1 - Local interface general features

MAIN INTERFACE SUMMARY INTERFACE

DUAL-CIRCUIT AIR-COOLED

MENU BLOCK

CHILLER INTERFACE

The local interface enables a number of operating parameters to be displayed and modified.

The interface consists of two distinct parts: the main interface (left hand section) and the summary interface (right hand section).

MAIN INTERFACE SUMMARY INTERFACE

DUAL-CIRCUIT WATER-COOLED

MENU BLOCK

CHILLER INTERFACE

Main interface

It gives access to all PRO-DIALOG PLUS data and operating functions. It consists of:

• A two-digit display showing the number of the item selected.

• A four-digit display showing the contents of the item selected.

• LEDs and buttons for unit start/stop, menu selection, menu item selection and value adjustment.

MAIN INTERFACE BUTTON NAME DESCRIPTION

Menu Permits the selection of a main menu. Each main menu is represented by an icon. The icon is lit if active.

Up arrow Permits scrolling through the menu items (in the two-digit display). If the modification mode is active this button authorises

Down arrow Permits scrolling through the menu items (in the two-digit display). If the modification mode is active this button authorises

Enter Gives access to the modification mode, validates a modification or displays expanded item description.

Start/stop Authorises start or stop of the chiller in local mode or modification of its operating type.

MAIN INTERFACE MENU LEDS LED NAME DESCRIPTION

INFORMA TIONS men u Displays the general operating parameters for the unit.

TEMPERATURES menu Displays the unit operating temperatures.

kPa

PRESSURES menu Displays the unit operating pressures.

SETPOINTS menu Displays the unit setpoints and enables them to be modified.

INPUTS menu Displays the status of the unit digital and analogue inputs.

OUTPUTS/TESTS menu Displays the status of the unit outputs and enables them to be tested.

increase of the value of any parameter.

decrease of the value of any parameter.

CONFIGURATIONS menu Displays the unit configuration and enables it to be modified.

ALARMS menu Displays active alarms.

ALARMS HISTORY menu Displays the history of the alarms.

OPERATING LOG menu Displays the operating times and number of starts for the unit and the compressors.

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The summary interface (right hand section) includes a mimic diagram of the unit, together with push-buttons and LEDs. It gives quick access to the main operating parameters of the unit.

SUMMARY INTERFACE LEDS LED INDICATION WHEN LIT

Green LED:

The unit is authorised to start or is already running

Red LED:

- Lit: circuit A or unit shut down by alarm

- Flashing: circuit A or unit running with alarm present

Red LED:

- Lit: circuit B or unit shut down by alarm

- Flashing: circuit B or unit running with alarm present

Red LED:

Water flow switch default or user safety lock open.

Green LED:

The evaporator pump is running.

Yellow LEDs:

From top to bottom - start/stop status of compressors A1, A2, A3 and A4 or B1, B2, B3 and B4. Flashing LED indicates that the circuit is in the protection or defrost mode (A or B).

Green LED:

The unit operates in heating mode.

Green LED:

The unit operates in cooling mode.

The following operating types can be selected using the Start/Stop button:

OPERATING TYPES 4-DIGIT DISPLA Y DESCRIPTION

LOFF Local Off. The unit is halted in local mode. L-On Local On. The unit is in local control mode and is authorised

to start.

L-Sc* Local On - timer control. The unit is in local control mode. It

is authorised to start if the period is occupied. If the timer program for unit operation is unoccupied, the unit remains

shut down until the period next becomes occupied. CCN* CCN. The unit is controlled by CCN commands. rEM* Remote. The unit is controlled by remote control contacts. MAST* Master Unit. The unit runs as a master in a two unit lead/lag

arrangement. This is displayed if the unit is configured for

master/slave control. See section 5.19.

Legend

* Displayed if the configuration requires it.

Section 5.1 gives a more detailed description of the commands to start/stop the unit, analysed by operating type.

4.2.2 - Stopping the unit in local mode

The unit can be stopped in local mode at any time by pressing the Start/Stop button.

SUMMARY INTERF A CE PUSH BUTTONS BUTTON DISPLAY

Blue button: evaporator leaving or entering water temperature in °C Gray button: outdoor air temperature in °C

Control point (setpoint + reset) in °C

kPa

Press 1: circuit A/B discharge pressure in kPa Press 2: circuit A/B saturated condensing temperature in °C

kPa

Press 1: circuit A/B suction pressure in kPa Press 2: circuit A/B saturated suction temperature in °C

Press 1: compressor A1/B1 operating hours in h/10 or h/100 Press 2: compressor A2/B2 operating hours in h/10 or h/100

4.2 - Unit start/stop control

4.2.1 - Description

The unit start/stop can be controlled by one of the following methods:

• Locally on the actual unit (Local control type)

• By remote control with the aid of user contacts (remote control type)

• By CCN control with the aid of the CCN (CCN control type)

The main interface includes a Start/Stop button which can be used to stop or start the unit in the local operating type or to select the remote or CCN operating type.

The available operating types are described in the following table.

TO STOP THE UNIT BUTTON ACTION 2-DIGIT DISPLAY 4-DIGIT DISPLAY

Press the Start/Stop C LOFF button for less than 4 seconds (one short press is enough).

If the button is t LOFF released, the unit stops without the need for further action.

4.2.3 - Starting unit and selecting an operating type

The unit can be started in local mode, or unit operating type can be changed at any time using the Start/Stop button. In the example that follows, the unit is stopped (LOFF) and the user wants to start the unit in local mode.

CHANGING THE OPERATING TYPE BUTTON ACTION

Continually press the operating type selection button for more than 4 seconds.

Hold down the Start/Stop button. The available operating types are displayed one by one until the button is released.

Release the Start/Stop button if the operating type you want is displayed (in this example LOn). "C" flashes in the 2-digit display to show that the controller is awaiting confirmation.

Press the Enter button to confirm the operating type selected (in this example: LOn). "t" is displayed in the 2-digit display to indicate the operating type selected. If the Enter button is not pressed soon enough, the controller will cancel the change and continue to use the previous operating type.

2-DIGIT 4-DIGIT DISPLAY DISPLAY

C LOFF

L-On L-Sc

rEM

L-On

t L-On

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4.3 - Menus

4.3.1 - Selecting a menu

The MENU button authorises you to select a menu from the 10 main menus that are available. Each time you press this button one of the 10 LEDs lights up in turn alongside each of the icons representing a main menu. The active menu is the one against which the LED is lit. If a menu is empty then its LED is not lit. To scroll quickly through the menus, hold the MENU button down.

4.3.2 - Selecting a menu item

The up and down Arrow buttons let you scroll through the menu items. Menu item numbers are displayed in the two-digit display. The item number increases or decreases every time you press the up or down Arrow button. The menu items that are not in use or incompatible with the configuration are not displayed. The value or status associated with the active item is displayed in the four-digit display. To scroll quickly through the items, hold the up or down Arrow button down.

The following example shows how to access item 3 in the Pressures menu.

SELECTING A MENU ITEM OPERA TION PRESS MENU LED ITEM NUMBER

Press the MENU button until the LED marked PRESSURE lights. 0

Press one of the Arrow buttons 1 until the two-digit display shows 3 (item number 3).

BUTTON 2-DIGIT

kPa

DISPLAY

NOTE: The access to a sub-menu may require entering a password. This is automatically requested. See section 4.5.7.2.

The example below shows how to modify the value of item 1 in the Setpoint menu.

MODIFYING THE V ALUE OF A PARAMETER OPERA TION PRESS MENU LED ITEM ITEM

button NUMBER NUMBER

2-DIGIT 4-DIGIT DISPLAY DISPLAY

Hold on the MENU button until 0 the LED for SETPOINT lights.

Press one of the Arrow buttons 1 until the two-digit display shows 1 item number 1- cooling setpoint 2). The value for setpoint 2 is displayed in the four-digit display 1 6.0 (6.0°C in this example).

Press the Enter button for more than 2 seconds to enable the value associated with item 1 to be 1 6.0 modified. The Setpoint men u LED flashes indicating that modification mode is active.

Keep pressing the Down Arrow 1 5.9 button until the value 5.7 is displayed in the four-digit displa y. The Setpoint menu LED keeps flashing. 1 5.8

1 5.7

Press the Enter button again to validate the change. The new setpoint is 5.7°C. The Setpoint 1 5.7 menu LED stops flashing, indicating that modification mode no longer applies.

4.3.3 - Modifying the value of a parameter/access to a submenu

Press the Enter button for more than 2 seconds to enter the modification mode or to select a sub-menu. This lets you correct the value of an item or select a sub-menu with the aid of the up and down Arrow buttons (if you are authorised to overwrite the item concerned). When modification mode is activated, the LED for the main menu to which the item belongs flashes in menu block. Once the required value is obtained, press the Enter button again to validate the change or to access the submenu. The LED for the menu to which the item belongs then stops flashing, indicating that modification mode no longer applies.

In modification mode, the value to be modified increases or decreases in steps of 0.1 every time you press the Arrow buttons. Holding one of these buttons down increases the rate of increase or decrease.

4.3.4 - Expand display

Pressing the Enter button causes a 23 character text expansion to be scrolled across the four-digit display. All user menus provide an expansion of the current displayed parameters. If the expansion is complete the four-digit display reverts to item value. This function can be inhibited through the User Configuration menu.

Page 13

4.4 - General menu structure

MAINTENANCE

[MAintEnAnCE]

RUNTIME

ALARMS HISTORY

SUB-MENUS

RUNTIME 2

[RuntiME 2]

RUNTIME 1

[RuntiME 1]

[MAStEr SLAvE]

MASTER/SLAVE

FACTORY

[FACtorY]

SERVICE 3

[SErviCE 3]

SERVICE

[SErviCE]

SERVICE 2

[SErviCE 2]

SERVICE 1

[SErviCE 1]

[brodCASt]

BROADCAST

SUB-SUB-MENUS

NOTE: The items in brackets show what is

displayed on the user interface.

MAIN MENUS

USER

[USEr]

[dAtE]

HOUR + DATE

[HoLidAy]

HOLIDAYS

SCHEDULE 2

[SCHEduLE 2]

SCHEDULE 1

[SCHEduLE 1]

USER 2

[USEr 2]

USER 1

[USEr 1]

[HoLidAy 1]

HOLIDAYS 1

[PEriod 1]

PERIOD 1

[PEriod 1]

PERIOD 1

[HoLidAy 3]

[HoLidAy 2]

HOLIDAYS 3

HOLIDAYS 2

[PEriod 3]

[PEriod 2]

PERIOD 3

PERIOD 2

[PEriod 3]

[PEriod 2]

PERIOD 3

PERIOD 2

SUB-SUB-SUB-MENUS

[HoLidAy 4]

HOLIDAYS 4

[PEriod 4]

PERIOD 4

[PEriod 4]

PERIOD 4

[HoLidAy 5]

HOLIDAYS 5

[PEriod 5]

PERIOD 5

[PEriod 5]

PERIOD 5

[HoLidAy 7]

HOLIDAYS 6

[PEriod 6]

PERIOD 6

[PEriod 6]

PERIOD 6

[HoLidAy 7]

HOLIDAYS 7

[PEriod 7]

PERIOD 7

[PEriod 7]

PERIOD 7

[HoLidAy 8]

HOLIDAYS 8

[PEriod 8]

PERIOD 8

[PEriod 8]

PERIOD 8

- - -

[HoLidAy15]

HOLIDAYS 15

[HoLidAy16]

HOLIDAYS 16

STATUS TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS

Page 14

4.5 - Menu tree structure

RUNTIMES

SUB-MENU:

Runtimes 1

ALARMS HIST

Historic alarm code 1

ALARMS

Number of active alarms/

resets

SUB-MENU:

Runtimes 1

SUB-MENU:

Historic alarm code 2

Historic alarm code 3

Active alarm code 1**

Active alarm code 2**

Maintenance--

Historic alarm code 4

Active alarm code 3**

Historic alarm code 5

Active alarm code 4**

Historic alarm code 6

Historic alarm code 7

Active alarm code 5**--

Historic alarm code 8

Historic alarm code 9

Historic alarm code 10--

NOTE: The items in brackets show what is displayed on the

user interface.

CONFIG

SUB-MENU:

User Configuration [USEr]

SUB-MENU:

Service Configuration

[SErviCE]

OUTPUTS

Compressor status,

circuit A

Compressor status,

circuit B

INPUTS

Contact 1: remote on/off

Contact 2: remote

setpoint

SETPOINTS

Cooling setpoint 1

Cooling setpoint 2

PRESSURES

Discharge pressure,

circuit A

Suction pressure, circuit

SUB-MENU:

Factory Configuration

[FACtorY]--

Capacity reduction

status, circuits A & B

Fan contactor status,

circuit A

Fan contactor status,

Contact 3: remote

heating/cooling

Contact 4: remote heat

reclaim operation

Demand limit selection

Heating setpoint

Condensing setpoint

Heat reclaim setpoint

Oil differential pressure,

compressor A1

Discharge pressure,

circuit B

Suction pressure,

circuit B

Alarm circuit status,

circuits A & B

EXV position, circuit A

Water flow & customer

interlock control

Evaporator pump fault

detection

Demand limit setpoint

in %

Cooling mode ramp

circuit B

Oil differential pressure,

compressor B1

Oil differential pressure,

compressor A2

EXV position, circuit B

Variable speed fan,

circuit A or cond. water

valve position in %

Variable speed fan,

circuit B or cond. water

Water flow control,

condenser

Control box thermostat

External 0-10 V d.c.

signal--

Heating mode ramp

Cooling - threshold for

zero reset

Cooling - threshold for

max. reset

Oil differential pressure,

compressor A3

Oil differential pressure,

compressor A4

Oil differential pressure,

compressor B2

valve position in %

Water pump 1 status

Water pump 2 status

Cooling - max. reset

value

Heating - threshold for

zero reset

Oil differential pressure,

compressor B3

Oil differential pressure,

compressor B4

Condenser pump status

Evap. heater & heat

reclaim cond. status

Cond. water valve posi-

tion, heat reclaim mode

Solenoid status, heat

Heating - threshold for

max. reset

Heating - max. reset

value--

Heat reclaim pressure,

circuit A

Heat reclaim pressure,

circuit B--

reclaim function

User test interface

TEMP

STATUS

ITEM

Evaporator water

Default display

entering temp.

Evaporator water

leaving temp.

Active modes

Condenser water

entering temperature

Condenser water

leaving temperature

Chiller occupied/

unoccupied

Minutes left before

starting

Heat reclaim water

entering temperature

Heat reclaim water

leaving temperature

Saturated discharge

Cooling/heating

selection

Heat reclaim

selection

Unit capacity in %

temperature, circuit A

Saturated suction

temperature, circuit A

Suction temperature,

Capacity circuit A

in %

Capacity circuit B

compressor A1

Superheat, circuit A

in %

Present demand

limit in %

Saturated discharge

temperature, circuit B

Saturated suction

temperature, circuit B

Suction temperature

compressor B1

Present lag limit in

Setpoint in local

control

Setpoint occupied/

unoccupied mode

Superheat, circuit B

Outdoor temperature

Water loop temp.,

master/slave assembly

Active setpoint

Control point

Controlled water

temperature

Condensing point

Heat reclaim

indicator, circuit A

Heat reclaim

indicator, circuit B

Legend

** Displayed if the alarm exists

- Not in use

Page 15

4.5.1 - Description of the Information menu

INFORMATION MENU [3] ITEM FORMAT UNITS

±nn.n °C LOFF -

L-On L-Sc CCn rEM MASt -

OFF rEADY dELAY -

StOPPing running triPout OvErridE -

OCCUPIEd UNOCCUPIEd -

COOL HEAT rECLAIM -

ALArM ALErt -

MAStEr SLAvE -

1 [1] nn -

2 [2] -

occu unoc Forc

3 nn.n minutes

4 [2] -

HEAt COOL -

5 [2]

YES -

NO 6 Nnn % 7 nnn % 8 [2] nnn % 9 [2] nnn

Forc % 10 nnn % 11 [2] -

SP-1

SP-2

AUtO 12 [2] -

occu

unoc

Forc 13 ±nn.n °C 14 ±nn.n

Forc °C

15 ±nn.n °C 16 ±nn.n °C

Forc °C 17 n 18 n

DESCRIPTION Automatic display mode. It cycles through the following displays:

1: Controlled water temperature: temperature of the water that the unit tries to maintain at the control point. 2: Unit operating type

Local Off Local On Local On - based on unit clock. CCN Control. Remote Control Master unit

3: Unit status

Off: Unit is stopped and not authorised to start. Ready: Unit is authorised to start Delay: Unit is in delay at start-up. This delay is active after the unit has been switched on. The delay can be configured in the User Configuration menu. Stopping: Unit is currently stopping. On: Unit is running or authorised to start. Fault shutdown. Limit: The operating conditions do not allow total unit operation.

4. Unit occupied/unoccupied status

Occupied: Unit in occupied mode Unoccupied: Unit in unoccupied mode

5. Heating/cooling operating mode

Cooling: Unit operates in cooling mode Heating: Unit operates in heating mode Cooling: Unit is in auto cooling and heat reclaim demand is active

6. Alarm mode

Alarm: Unit is totally stopped because of failure. Alert: Unit is in failure but not completely stopped.

7. Master/Slave status

Master: The master/slave control is active and the unit is the master Slave: The master/slave control is active and the unit is the slave

Active mode codes. Each active mode is displayed in turn. This Item is masked when nil. Pressing the enter button when a mode code is displayed causes a character text expansion to be scrolled accross the four-digit display. See the description in the following table

This item indicates the current chiller occupied/unoccupied mode. Occupied Unoccupied The value is displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.

Start-up delay. This item indicates the minutes left before the unit can be started. This delay at start-up is always active after the unit has been switched on. The delay can be configured in the User Configuration 1 menu.

Heating/cooling on selection: This item is accessible in read/write, if the unit is in local control mode. It is only displayed, if the unit is in LOFF, L-On or L-Sc operating type. Displayed for heat pumps. Heating mode selection Cooling mode selection

Heat reclaim mode selection: This item is accessible in read/write, if the unit is in local control mode. It is only displayed, if the unit is in LOFF, L-On or L-Sc operating type. Displayed for air-cooled or water-cooled units with a condenser water valve. Heat reclaim mode selection, use of heat reclaim condensing setpoint. Normal cooling mode selection, use of standard condensing setpoint

Total active capacity of unit. Total active capacity of circuit A. Total active capacity of circuit B. Present demand limit. This is the authorised operating capacity of the unit. See section 5.8.

The value is displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.

Present lag chiller demand limit. Displayed when the master/slave control is selected. Setpoint select in local mode. This point is read/write accessible. Displayed only when the unit is LOFF, L-On or L-Sc operating type.

SP-1 = cooling setpoint 1 SP-2 = cooling setpoint 2 AUtO = active setpoint depends on schedule 2 (setpoint selection schedule). See section 5.7.1 & 4.5.7.6.

Setpoint occupied mode.

Occupied: cooling setpoint 1 is active Unoccupied: cooling setpoint 2 is active The value shall be displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.

Active setpoint. This is the current cooling/heating setpoint: it refers to cooling/heating setpoint 1 or 2. Control point. This is the setpoint used by the controller to adjust the temperature of the leaving or entering water (according to

configuration). Control point = active setpoint + reset. See section 5.7 The value is displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.

Controlled water temperature. W ater temperature that the unit tries to maintain at the control point. Condensing setpoint. The value is displayed in turn with 'Forc' if the unit is in CCN mode and this parameter is forced by CCN.

Heat reclaim function indicator, circuit A (see heat reclaim section) Heat reclaim function indicator, circuit B (see heat reclaim section)

Legend

1 This item is masked when nil. 2 This item is displayed in certain unit configurations only. 3 Access to this menu is read-only except for item 10 that can be forced when the unit is in Local operating type.

Page 16

DESCRIPTION OF OPERATING MODES (ITEM 1 OF THE INFORMATION MENU) MODE # MODE NAME

7 Delay at start-up active

8 2nd cooling setpoint active 9 Setpoint reset active

10 Demand limit active 11 Ramp loading active

12 Low entering water temperature

protection in heating mode

13,14 Low suction temperature protection

15,16 Low discharge superheat protection

17,18 High pressure protection

19,20 Not used 21 Heat reclaim active

22 Evaporator heater active 23 Evaporator pump reversal active 24 Periodic evaporator pump start-up

25 Low night-time capacity

26 Unit under SM control 27 Master/slave link active

DESCRIPTION

The delay at start-up operates after the unit has been switched on. If the delay has not expired, the mode is active. The delay is configured in the User1 configuration menu.

The second cooling setpoint is active. See section 5.7.1 In this mode, the unit uses the reset function to adjust the leaving or entering water temperature setpoint. See

section 5.7.2. In this mode, the capacity at which the unit is allowed to operate is limited. See section 5.8. Ramp loading is active. In this mode, the controlled high or low water temperature value (in °C/min) in heating mode

is limited to a preset value in order to prevent compressor overload. The ramp function must be configured (see User1 configuration menu). The ramp values can be modified (see setpoint menu).

The unit is in heating mode and the temperature of the evaporator leaving water is lower than the lesser of the two cooling setpoints. A capacity stage is removed. This mode only applies to heat pumps.

13 = circuit A & 14 = circuit B. Protection for evaporator suction low temperature circuit is active. In this mode, circuit capacity is not authorised to rise if the unit is in cooling mode, and saturated suction temperature in the circuit is lower by more than 13°C at the leaving chilled water and lower than the frost protection threshold.

15 = circuit A & 16 = circuit B. In this mode the circuit capacity is shut down by pumpout and not allowed to restart, when the low superheat alarm conditions are satisfied. During the shutdown/start-up sequence, mode 15 or 16 is active. See descriptions for alarms 48 and 49.

17 = circuit A & 18 = circuit B. The circuit is in high pressure protection mode because the HP protection threshold has been exceeded. The circuit capacity is not authorised to rise and any slave compressor can be stopped in order to prevent a high pressure break.

Circuit A or circuit B operates in heat reclaim mode and not in standard cooling mode (pumpdown phase is activated).

Mode active if risk of frost exists. Two evaporator water pumps installed on the unit and pump reversal is active. See section 5.3 The unit is shut down and is started every day at 14:00 hours for 2 seconds. This function must be configured in the

User1 menu. See sections 5.3 and 4.5.7.3. Unit capacity is limited. The period when this mode starts, as well as the limited capacity in night-time mode are

controlled in Client1 menu. Unit is under control of a System Manager (FSM or CSM III). Unit is connected to a secondary unit by a master slave link and either:

- the unit is configured as a master and this master is operating, or

- the unit is configured as a slave and this slave is operating.

4.5.2 - Description of the Temperatures menu

TEMPERATURES MENU [2] ITEM FORMAT UNITS COMMENTS

0 ±nn.n °C Evaporator entering water temperature 1 ±nn.n °C Evaporator leaving water temperature 2[1] ±nn.n °C Condenser entering water temperature 3[1] ±nn.n °C Condenser leaving water temperature 4[1] ±nn.n °C Reclaim condenser entering water temperature 5[1] ±nn.n °C Reclaim condenser leaving water temperature 6 ±nn.n °C Saturated discharge temperature circuit A 7 ±nn.n °C Saturated suction temperature circuit A 8 ±nn.n °C Suction temperature compressor A1 9 ±nn.n °C Superheat circuit A 10[1] ±nn.n °C Saturated discharge temperature circuit B 11[1] ±nn.n °C Saturated suction temperature circuit B 12[1] ±nn.n °C Suction temperature compressor B1 13[1] ±nn.n °C Superheat circuit B 14[1] ±nn.n °C Outdoor temperature 15[1] ±nn.n °C Water loop temperature, master/slave assembly

Legend

1 This item is displayed in certain unit configurations only 2 Access to this menu is read-only.

4.5.3 - Description of the Pressures menu

PRESSURES MENU [2] ITEM FORMAT UNITS COMMENTS

0 nnnn kPa Discharge pressure circuit A 1 nnnn kPa Suction pressure circuit A 2 nnnn kPa Differential oil pressure compressor A1 3 nnnn kPa Discharge pressure circuit B 4 nnnn kPa Suction pressure circuit B 5 nnnn kPa Differential oil pressure compressor B1 6[1] nnnn kPa Differential oil pressure compressor A2 7[1] nnnn kPa Differential oil pressure compressor A3 8[1] nnnn kPa Differential oil pressure compressor A4 9[1] nnnn kPa Differential oil pressure compressor B2 10[1] nnnn kPa Differential oil pressure compressor B3 11[1] nnnn kPa Differential oil pressure compressor B4 12[1] nnnn kPa Pumpdown pressure, heat reclaim, circuit A 13[1] nnnn kPa Pumpdown pressure, heat reclaim, circuit B

Legend

1 This item is displayed in certain unit configurations only. 2 Access to this menu is read-only

Page 17

4.5.4 - Description of the Setpoints menu

SETPOINTS MENU [2] ITEM FORMAT UNITS RANGE

0 ±nn.n °C See table below 1 ±nn.n °C See table below 2 nnn °C See table below 3 [1] nnn °C See table below

4 [1] nnn °C See table below

5 nnn % 0 to 100

6 [1] ±nn.n °C/min 0.1 to 1.1

7 [1] ±nn.n °C/min 0.1 to 1.1

8 [1] ±nn.n [3] See table below 9 [1] ±nn.n [3] See table below 10 [1] ±nn.n °C See table below 11 [1] ±nn.n [3] See table below 12 [1] ±nn.n [3] See table below 13 [1] ±nn.n °C -16 to 16

Legend

1 This item is displayed in certain unit configurations only. 2 All points contained in this table can be modified. * Those setpoints can be used for entering or leaving water temperature control. By default the unit controls the evaporator entering fluid temperature.

Leaving fluid temperature control requires a parameter modification in the Service Configuration menu.

** These parameters are only accessible when reset based on OAT or delta T has been selected in the User Configuration 1 menu. See section 4.5.7.3.

COMMENTS

This item lets you display and modify Cooling setpoint 1* This item lets you display and modify Cooling setpoint 2* This item lets you display and modify Heating setpoint*, only displayed for heat pumps. This item lets you display and modify the condensing setpoint*. It is used by the control to regulate the fan

stages or a variable-speed fan (air-cooled units) or the condenser water valve control (water-cooled units), if the unit is not in heat reclaim mode.

This item lets you display and modify the heat reclaim setpoint*. As item 3, this is used for condensing setpoint control.

Capacity limit setpoint. Limitation by volt-free contact. This item is used to define the maximum capacity that the unit is authorised to use, if the capacity limit contact activate the limit. See section 5.8.

Cooling ramp loading rate. This parameter is only accessible if the ramp function is validated in the User Configuration 1 menu. This item refers to the maximum rate of temperature rise in °C in the water heat exchanger in cooling mode. When capacity loading is effectively limited by the ramp, mode 11 is active.

Heating ramp loading rate. This parameter is only accessible if the ramp function is validated in the User Configuration 1 menu. This item refers to the maximum rate of temperature drop in °C in the water heat exchanger in heating mode. When capacity loading is effectively limited by the ramp, mode 11 is active.

Zero reset threshold, cooling mode** Full reset threshold, cooling mode** Full reset value, cooling mode** Zero reset threshold, heating mode** Full reset threshold, heating mode** Full reset value, heating mode**

SETPOINT DESCRIPTION CONTROL FOR CONTROL FOR

Cooling Minimum setpoint

- Water 3.3°C 9.3°C

- Medium Brine -10°C-4°C

- Low Brine -20°C -14°C Maximum setpoint

Heating Maximum setpoint MCT - 4.0 MCT - 10.0

Note:

Three setpoint reset configuration modes can be selected in the Client1 menu: 1 Reset using an external 0-10 V d.c. signal 2 Reset using Delta T 3 Reset by external temperature sensor (air-cooled units only) The items with zero reset or maximum reset are based on these three modes.

LEAVING WATER ENTERING WATER

Page 18

4.5.5 - Description of the Inputs menu

INPUTS MENU [2] ITEM FORMAT UNITS

0 OPEn/CLoS -

1 OPEn/CLoS -

2[1] OPEn/CLoS -

3[3] OPEn/CLoS -

4 OPEn/CLoS -

5 OPEn/CLoS -

6[1] OPEn/CLoS -

7[1] OPEn/CLoS 8[1] OPEn/CLoS -

9[1] nn.n -

Legend

1 This item is displayed in certain unit configurations only 2 Access to this menu is read-only * Active in all operating types

See section 3.4

COMMENTS Remote contact 1 status

This contact is used to start (contact closed) and stop (contact open) the chiller. It is only valid, if the unit is in the remote operating control (rEM) mode.

Remote contact 2 status

This contact is used to select a cooling only setpoint, if the unit is in cooling mode and in the remote operating control (rEM) type. Contact open = csp1 Contact closed = csp2

Remote contact 3 status

This contact is used to select the heating or cooling mode, only if the unit is in the remote operating control type. Contact open: unit in cooling mode Contact closed: unit in heating mode

Remote contact 4 status

This contact is used to select the second condensing setpoint or the heat reclaim mode (for a heat reclaim unit), only if the unit is in the remote operating control type. Contact open = unit uses the normal condensing setpoint and is in normal mode (no heat reclaim) Contact closed = unit uses the heat reclaim setpoint and is in heat reclaim mode.

Remote contact 5 status*

If this contact is closed, it permits limiting the unit demand, based on the demand limit setpoint, if the demand limit method by contact has been selected.

Water flow and customer interlock contr ol contact status*

Opening of this contact shuts the unit off or prevents its start-up and generates an alarm. It is used to control the water circulation. Water pump operation status. If the contact opens when the evaporator pump has received a command to operate, this trips a

pump failure alarm.

Condenser water flow control. Controls the condenser water circulation. Control box thermostat and phase reversal interlock status*. Opening of this contact shuts the unit off or prevents its start-up

and generates an alarm. External 0-10 V d.c. signal. This signal from an external source can be used (based on the configuration) for the reset or demand

limit function of the unit.

4.5.6 - Description of the Outputs/Tests menu

4.5.6.1 - General

This menu displays the status of the controller outputs. Moreover, when the machine is fully stopped (LOFF) the outputs can be activated for manual or automatic tests (the access to the tests is password controlled).

4.5.6.2 - Menu description

OUTPUTS STATUS AND TESTS MENU [2] [3] ITEM FORMAT UNITS

1 [1]

2 [1] tEST

3 [1] tESt

DESCRIPTION. Compressor status

b1 = compressor A1 b2 = compressor A2 b3 = compressor A3 b4 = compressor A4 This item permits display of the compressor status in circuit A. It also permits independent testing. In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.

Compressor status

b1 = compressor B1 b2 = compressor B2 b3 = compressor B3 b4 = compressor B4 This item permits display of the compressor status in circuit B. It also permits independent testing. In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.

Capacity reduction status, circuits A & B

b1 = capacity reduction A1 b2 = capacity reduction B1 This item permits display of the capacity reduction status in circuit A. It also permits independent testing.

Fan contactor status/test, circuit A

b1 = fan contactor assembly 1 b2 = fan contactor assembly 2 b3 = fan contactor assembly 3 b4 = fan contactor assembly 4 This item permits display of the fan stages. It also permits independent testing. In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.

Page 19

OUTPUTS STATUS 2 AND TESTS MENU [2] [3] - cont. ITEM FORMAT UNITS

4 [1] tESt -

5 tESt

6 tESt %

7 tESt %

8 [1] tESt % 9 [1] tESt % 10 On -

Stop -

tESt -

FAIL -

Good -

Forc -

11 On -

OFF -

tESt -

FAIL -

Good -

Forc -

12 On -

OFF -

tESt

FAIL

Good

Forc

13[1] nn

14[1] tESt % 15[1]

16 YES

no tESt

Legend

1 This item is displayed in certain unit configurations only 2 A test is only possible if the units are in local off mode and if all compressors have stopped 3 The password is only valid for the test. 'Test' is displayed during the test, alternating with the item number

DESCRIPTION Fan contactor status/test, circuit B

Alarm command status/test

b1 = alarm circuit A b2 = alarm circuit B In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each alarm output.

EXV position, circuit A

In the test mode the direction arrows permit forcing the valve to its fully open position.

EXV position, circuit B

In the test mode the direction arrows permit forcing the valve to its fully open position.

Variable speed fan, circuit A or condenser water valve position in % Variable speed fan, circuit B or condenser water valve position in % Evaporator water pump No. 1 command status. Not displayed if unit does not control a pump.

On: the pump operates Stop: the pump has stopped Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it is then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with 'Forc' if its status is forced by CCN. During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display appears:

- Fail: displayed if the test has failed, because the pump is not started

- Good: displayed if the test succeeds Evaporator water pump No. 2 command status. Not displayed if unit does not control a pump.

- Fail: displayed if the test has failed, because the pump is not started

- Good: displayed if the test succeeds

Condenser pump status/test

- Fail: displayed if the test has failed, because the pump is not started

- Good: displayed if the test succeeds

Evaporator heater and heat reclaim condenser status

b1 = evaporator heater b2 = heat reclaim condenser heater

Condenser water valve position in heat reclaim mode Solenoid valve status/test, heat reclaim function

b1 = heat reclaim coil shutoff solenoid valve, circuit A b2 = heat reclaim coil drain solenoid valve, circuit A b3 = heat reclaim coil shutoff solenoid valve, circuit B b4 = heat reclaim coil drain solenoid valve, circuit B In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.

Used only for local interface

Cause all diodes and blocks to light up or flash, to verify that they are operating correctly

Page 20

4.5.6.3 - Manual tests

This function allows the user to test the outputs individually, if the machine is completely shut down (LOFF). To carry out a manual test use the arrow keys to access the output to be tested and press the Enter key (longer than 2 seconds) to activate the modification mode. The passwo rd is automatically requested, if it has not previously been verified . T he Outputs/Test LED on the user interface begins to flash. Enter the desired test value and again press Enter to start the test. 'TESt' is displayed on the 4digit display alternately with the value tested. The Outputs/Test LED stops flashing. Press the Enter key or an arrow key to stop the test.

4.5.7 - Description of the Configuration menu

4.5.7.1- General

This menu can be used to display and modify all configurations: Factory, Service and User. Only the User Configuration can be modified by the end-user. The Factory, Service and master/slave configurations are not described in this document. A configuration can only be modified if the unit is fully stopped (LOFF).

The menus User 1 [USEr 1] and User 2 [USEr 2] are password-protected. The other menus are directly accessible, except if item 12 of the User 1 menu (password for all configurations) has been validated.

4.5.7.2 - Password

A password must be entered in order to access the test function or to modify a configuration. It is automatically requested, if necessary: 'EntEr PASS' is displayed on the 4-digit display and the configuration menu LED flashes, indicating that the modification mode is active. Press the arrow keys until the value '11' is displayed on the 4-digit display . Press Enter to validate this. The configuration menu LED stops flashing. If the password is correct, 'Good' is displayed. If the password is incorrect, 'PASS incorrEct' is displayed. The User password has a default value of 11.

This value can be modified through the Service configuration. The password can be entered if the unit is fully stopped, otherwise 'ACCES dEniEd' (access denied) will be displayed on the 4-digit display. The controller automatically deactivates the password after 5 minutes without activity (i.e. no buttons pressed) or after powering up.

SUB-MENU USER CONFIGURATION

USER 1

ITEM

[USER1]

Return to previous menu

Circuit selection

Circuit capacity increase

sequence Ramp selection*

Start-up delay*

Water pump selection

Water pump changover

delay* Automatic reset

selection* Demand limit selection

Voltage corresponding to

100% of demand limit Voltage corresponding to

0% of demand limit Extended display

selection Password for all user

configurations Software version number

USER 2 [USER2]*

Return to previous menu*

Periodic pump startup*

Night mode - start hour*

Night mode - end hour*

Night mode - demand limit in %

Number clock 1*

Number clock 2*

CCN address *

CCN bus*

DATE [dAtE]*

Return to previous menu

Hour*

Day of the week*

Day and month*

Year*

SCHEDULE 1 [ScHEduLE 1MEnu]*

Return to previous menu

SUB-MENU: Period 1 [PErIod 1]

SUB-MENU: Period 2 [PErIod 2]

SUB-MENU: Period 3 [PErIod 3]

SUB-MENU: Period 4 [PErIod 4]

SUB-MENU: Period 5 [PErIod 5]

SUB-MENU: Period 6 [PErIod 6]

SUB-MENU: Period 7 [PErIod 7]

SUB-MENU: Period 8 [PErIod 8]

SCHEDULE 2 [ScHEduLE 2 MEnu]*

Return to previous menu

SUB-MENU: Period 1 [PErIod 1]

SUB-MENU: Period 2 [PErIod 2]

SUB-MENU: Period 3 [PErIod 3]

SUB-MENU: Period 4 [PErIod 4]

SUB-MENU: Period 5 [PErIod 5]

SUB-MENU: Period 6 [PErIod 6]

SUB-MENU: Period 7 [PErIod 7]

SUB-MENU: Period 8 [PErIod 8]

HOLIDAYS [HOLidAy MEnu]*

Return to previous menu

SUB-MENU: Holidays 1 [HOLidAy 1]

SUB-MENU: Holidays 2 [HOLidAy 2]

SUB-MENU: Holidays 3 [HOLidAy 3]

SUB-MENU: Holidays 4 [HOLidAy 4]

SUB-MENU: Holidays 5 [HOLidAy 5]

SUB-MENU: Holidays 6 [HOLidAy 6]

SUB-MENU: Holidays 7 [HOLidAy 7]

SUB-MENU: Holidays 8 [HOLidAy 8]

SUB-MENU: Holidays 9 [HOLidAy 9]

SUB-MENU: Holidays 10 [HOLidAy 10]

SUB-MENU: Holidays 11 [HOLidAy 11]

SUB-MENU: Holidays 12 [HOLidAy 12]

SUB-MENU: Holidays 13 [HOLidAy 13]

SUB-MENU: Holidays 14 [HOLidAy 14]

SUB-MENU: Holidays 15 [HOLidAy 15]

SUB-MENU: Holidays 16 [HOLidAy 16]

BROADCAST [BrodCASt]*

Return to previous menu

Broadcast acknowledger selection

Broadcast activation

Outdoor temperature broadcast bus

Outdoor temperature broadcast element

Start month daylight saving time

Start day daylight saving time

Start hour daylight saving time

Minutes to add

End month daylight saving time

End day daylight saving time

End hour daylight saving time

Minutes to subtract

Legend:

*: only displayed if configuration requires.

Page 21

CONFIGURATION

USER [USEr]

USER1 [USEr 1]

USER2 [USEr 2]

SCHEDULE 1 [SCHEduLE 1]*

PERIOD 1

PERIOD 2

PERIOD 3

PERIOD 4

PERIOD 5

PERIOD 6

PERIOD 7

PERIOD 8

SCHEDULE 2 [SCHEduLE 2]*

PERIOD 1

PERIOD 2

PERIOD 3

PERIOD 4

PERIOD 5

PERIOD 6

PERIOD 7

PERIOD 8

HOLIDAYS [HOLIDAYS]*

HOLIDAY 1

HOLIDAY 2

HOLIDAY 3

HOLIDAY 4

HOLIDAY 5

HOLIDAY 6

HOLIDAY 7

HOLIDAY 8

...

HOUR + DATE [dAtE]*

BROADCAST [broAdCASE]*

SUB-MENU PERIOD CONFIGURATION* Item PERIOD 1 to 8

[PEriod X MEnu]*

0 Return to previous menu 1 Start of occupied period 2 End of occupied period 3 Selection Monday 4 Selection Tuesday 5 Selection Wednesday 6 Selection Thursday 7 Selection Friday 8 Selection Saturday 9 Selection Sunday 10 Selection holidays

HOLIDAY 15

HOLIDAY 16

SUB-MENU HOLIDAY CONFIGURATION* Item HOLIDAYS 1 to 16

[HoLidAy X MEnu]*

0 Return to previous menu 1 Start month holidays 3 Start day holidays 4 Number of days, holidays

Legend

*: only displayed if configuration requires.

NOTE: The items in brackets show what is displayed on the user interface.

Page 22

4.5.7.3 - Description of the User 1 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU [2] ITEM FORMAT UNITS DEFAULT COMMENTS

0 USEr MEnu - - When selected this item authorises return to the previous menu. 1 [1] 0/1/2 0 Lead circuit selection

2 [1] 0/1 - 0 Circuit capacity increase sequence

3 [1] YES/no - no Ramp loading select. For units with more than one compressor per circuit.

4 1 to 15 min 1 Delay at start-up. This value is reinitialised after power-up or when both circuits are halted by local, remote

5 0/1/2/3/4 - 0 Pump sequence select

6 [1] 24 to 3000 hours 48 Pump changeover delay. Displayed if auto pump sequence is selected. This parameter is used for pump

7 0/1/2/3 - 0 Automatic heating/cooling changeover selection. Permits activation of automatic reset type

8 0/1/2 - 0 Demand limit selection

9 [1] 0 to 10 Volts 0 Voltage corresponding to 100% of the demand limit 10 [1] 0 to 10 Volts 0 Voltage corresponding to 0% of the demand limit 11 «YES/no» - yes Extended menu select

12 «YES/no» -noPassword for all User Configurations

13 nn.n - - Software version number

Legend

1 This item shall be masked when not used. 2 Access to menu is read/write.

0 = automatic based on the number of start-ups and the operating hours of each circuit 1 = lead circuit A 2 = lead circuit B

0 = equal charge for both circuits 1 = priority charge on one circuit

Yes = ramp enabled No = ramp disabled This configuration enables the ramp to be activated for heating or cooling (depending on configuration): the maximum rate (in °C/min) of temperature drop or rise for the heat exchanger water (leaving or entering, upon configuration). Ramp setting value can be configured in the Setpoint menu.

or CCN command. No compressor will be started up until this pause has expired. However, the evaporator pump command will be activated immediately. The safety lockout loop will not be checked until the pause has expired.

0 = no pump 1 = one pump only 2 = two pumps with auto rotation 3 = pump #1 manual select 4 = pump #2 manual select If the auto sequence is selected, the pump change-over occurs when the rotation delay is elapsed. If the manual sequence is selected then, the selected pump is used in priority. Change-over occurs if one pump fails.

auto-rotation: the control tries to limit the pump run time difference to the pump changeover delay value. Change-over between pumps occurs when this difference becomes greater than the configured pump changeover delay.

0 = none 1 = 0-10 V d.c. reference voltage 2 = temperature difference 3 = outdoor temperature

0 = demand limit not selected 1 = demand limit by contact 2 = demand limit by external signal 0-10 V d.c.

Yes = menu description available No = menu description not available This item authorises activating or inhibiting the menu item expanded display.

Yes = password required for all User Configurations (Date, Time Schedule, Broadcast) No = password require for User menu only When this item is validated, the User Password will be required for all configurations accessible by the User.

This item shows the number of the software version used by this controller. Access is read only.

Page 23

4.5.7.4 - Description of the User 2 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU ITEM FORMAT UNITS DEFAULT COMMENTS

0 USEr 2 Menu When selected this item authorises return to the previous menu. 1[1] YES/no - no Periodic pump quick-start of the water pump(s)

2 [1] n

3 [1] n

4 [1] 0 to 100 % - Night mode demand limit value.

5 [1] 0 or 65 to 99 - 0 Schedule 1 clock number (for unit on/off schedule, see section 4.5.7.6).

6 [1] 0 or 65 to 99 - 0 Schedule 2 clock number (schedule for setpoint selection, see section 4.5.7.6).

7 [1] 1 to 239 - 1 CCN element address.

8 [1] 0 to 239 - 0 CCN bus number.

Legend

n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash so that minutes can be adjusted.

1n2n3 n4

00:00 to 23:59 - 00:00 Authorises entering the time of day at which the night control mode starts. During this period the fan runs at

1n2n3 n4

00:00 to 23:59 - 00:00 Authorises entering the time of day at which the night control mode ends.

: hours (00 to 23). The first time the Enter button is continuously pressed, the first two characters in the 4-digit display flash so that hours can be adjusted.

1n2

Yes = the pump is started periodically when the unit is manually stopped. No = periodic pump start is disabled When the unit is manually stopped (e.g. during the winter season) the pump is started each day at 14.00 hours for 2 seconds. If two pumps are available, pump #1 is started on odd days and pump #2 on even days.

Night control mode - start time*

low speed (to reduce fan noise) if permitted by operating conditions, and unit capacity is limited to the maximum night values.

Night control mode - end time*

Authorises configuration of the maximum capacity authorised during the night mode.

0 = schedule in local operating mode 65 to 99 = schedule in CCN operating mode

No two network elements can have the same element number and bus number at the same time.

4.5.7.5 - Description of Date and Time configuration submenu

DATE & TIME CONFIGURATION SUB-MENU ITEM FORMAT COMMENTS

0 dAtE MEnu When selected this item authorises return to the

2 Current day of week setting.

4 nnnn Current year setting.

1n2n3n4

00:00 to 23:59 n1n2: hours (00 to 23). The first time the Enter button is

«Mo» Monday «tU» Tuesday «uE» Wednesday «tH» Thursday «Fr» Friday «SA» Saturday «Su» Sunday

1n2n3n4

01:01 to 31:12 n1n2:day (01 to 31). The first time the Enter button is

previous menu. Current time setting.

continuously pressed, the first two characters in the 4digit display flash so that hours can be adjusted. n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash and minutes can be adjusted.

Current day and month setting. continuously pressed, the first two characters in the 4-

digit display flash so that day can be adjusted. n3n4:month (01 to 12). Continuous pressing of the Enter key again causes the last two characters to flash so that month can be adjusted.

4.5.7.6 - Description of the Time Schedules sub-menus

The control provides two timer programs: time schedule 1 and time schedule 2.

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

The second timer program (schedule #2) provides a means to automatically switch (when auto mode is selected) the active setpoint from an occupied setpoint to an unoccupied setpoint. Cooling or heating setpoint 1 is used during occupied periods. Cooling setpoint 2 is used during unoccupied periods. For additional information on setpoint activation see section 5.7.1.

Each schedule consists of eight time periods set by the operator. These time periods can be flagged to be in effect or not in effect on each day of the week plus a holiday period (see section 4.5.7.7 on public holidays). The day begins at 00.00 hours and ends at 24.00 hours.

Program is in unoccupied mode unless a schedule time period is in effect. If two periods overlap and are both active on the same day, the occupied mode tak es priority o v er the unoccupied per iod.

Each of the eight periods can be displayed and changed with the aid of a sub-sub-menu. The table below shows how to access the period configuration. Method is the same for the time schedule #1 or the time schedule #2.

Page 24

PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 8) ITEM # FORMA T COMMENTS

0 Period X Menu Indicates the period (X) you are going to

3 Mo- 0 or Mo- 1 1 = the period is in effect on Monday.

4 tu- 0 or tu- 1 1 = the period is in effect on Tuesday.

5 UE-0 or UE- 1 1 = the period is in effect on Wednesday.

6 tH- 0 or tH- 1 1 = the period is in effect on Thur sday.

7 Fr-0 or Fr- 1 1 = the period is in effect on Friday.

8 SA- 0 or SA- 1 1 = the period is in effect on Saturday.

9 Su- 0 or Su- 1 1 = the period is in effect on Sunday.

10 Ho- 0 or Ho- 1 1 = the period is in effect on public holidays.

Legend * n

1n2n3n4

00:00 to 24:00 Authorises entering the time of day at which the

1n2n3n4

00:00 to 24:00 Authorises entering the time of day at which the

: hours (00 to 24). The first time the Enter button is continuously pressed,

1n2

the first two characters in the 4-digit display flash so that hours can be adjusted. n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash so that minutes can be adjusted.

configure. When selected this item authorises a return to the main menu.

Occupied period - Start time*. occupied period starts.

Occupied period - End time*. occupied period ends.

0 = period not in effect on Monday

0 = period not in effect on Tuesday.

0 = period not in effect on Wednesday.

0 = period not in effect on Thursday.

0 = period not in effect on Friday.

0 = period not in effect on Saturday.

0 = period not in effect on Sunday.

0 = period not in effect on public holidays.

Typical timer program:

Time

10 11 12 1 14 1 1 17 1 19 2 21 22 23 24

P1 P1

6 7 8

P3P2P2 P3 P3

P5P4P4P3P2P2 P5P4P4P3P2P2 P5P4P4P3P2P2 P5P4P4P3P2P2

P5P4P4P3P2P2 P4P4P3P2P2 P4P4P3P2P2 P4P4P3P2P2 P4P4P3P2P2 P4P4P3P2P2

HOLSUNSATFRITHUWESTUEMON

MON : Monday TUE : Tuesday WED : Wednesday THU : Thursday FRI : Friday SAT : Saturday SUN : Sunday HOL : Public holidays

P6P3

Occupied Unoccupied

4.5.7.7 - Description of the Holidays sub-menus

This function is used to define 16 public holiday periods. Each period is defined with the aid of three parameters: the month, starting day and duration of the public holiday period. During these public holidays the controller will be in occupied or unoccupied mode, depending on the programmed periods validated for public holidays (see section 4.5.7.8).

Each of these public holiday periods can be displayed and changed with the aid of a sub-menu.

ATTENTION: The broadcast function must be activated to utilise the holiday schedule, even if the unit is running in stand-alone mode (not connected to CCN). See section

4.5.7.6.

HOLIDAY PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 16) ITEM # FORMA T COMMENTS

0 HoLidAy X Sub-menu When selected this item authorises a return

to the configuration menu.

1 0 to 12 Start month of public holiday period

0 = period not in use 1 = January, 2 = February, etc.

2 0 to 31 Start day of public holiday period. 0 period

not in use.

3 0 to 99 days Duration of the public holiday period in

days.

NOTE: Typical programming for public holidays:

- A public holiday period lasting 1 day on 20th May, for instance, is configured as follows: start month = 5, start day = 20, duration = 1

- A public holiday period lasting 2 day on 25th May, for instance, is configured as follows: start month = 5, start day = 25, duration = 2

4.5.7.8 - Description of the Broadcast sub-menu

The controller provides a broadcast configuration menu which you can use to configure the unit to be the CCN’s broadcaster, responsible for transmitting the time, outdoor temperature, and holiday flags to all system elements.

This menu also authorises setting the date to begin and end daylight saving time . There should be only one broadcaster in a CCN, so this table should not be configured if any other system element is acting as broadcaster.

ATTENTION: If the unit operates in standalone mode (not CCN connected) this menu must be used if the holiday function is used, or to correct for daylight saving time.

P1: period 1, 0h00, 3h00, Monday P2: period 2, 7h00, 18h00, Monday and Tuesday P3: period 3, 7h00, 21h00, Wednesday P4: period 4, 7h00, 17h00, Thursday and Friday P5: period 5, 7h00, 12h00, Saturday P6: period 6, 20h00, 21h00, Public holidays P7: period 7, Not used in this example P8: period 8, Not used in this example

Starts at Ends at Active on

Page 25

BROADCAST CONFIGURATION SUB-MENU ITEM # FORMAT COMMENTS

0 broAdCASt MEnu When selected this item authorises a return to the main menu. 1 YES/no Determines whether or not the unit is a broadcast acknowledger when the unit is connected on a CCN network. There must be

2 YES/no This item authorises enabling or disabling the Broadcast function. When it is set to Yes, the control will make a periodic

3 nnn OAT Broadcaster bus number: it is the bus number of the system that has the outside air temperature sensor connected to it.

4 nnn OAT Broadcaster element number: it is the element number of the system element that has the outside air temperature sensor

5nn Daylight saving start month. In this mode you enter the month in which the broadcaster will adjust its time for the start of

6nn Daylight saving start day. In this mode you enter the day on which the broadcaster will adjust its time for the start of daylight

8 nnnn Daylight saving start minutes to add: number of minutes by which the broadcaster will adjust its time for the start of daylight

9nn Daylight saving stop month. In this mode you enter the month in which the broadcaster will adjust its time for the end of

10 nn Daylight saving stop day. In this mode you enter the day on which the broadcaster will adjust its time for the end of daylight

11 n

12 nnnn Daylight saving start minutes to subtract: number of minutes by which the broadcaster will adjust its time for the end of

0 to 239 Used for CCN network function only.

0 to 239 connected to it. Used for CCN network function only.

1 to 12 daylight saving time.

1 to 31 saving time.

1n2n3n4

00:00 to 24:00 adjust its time for the start of daylight saving time.

1 to 1440 minutes saving time.

1 to 12 daylight saving time.

1 to 31 saving time.

1n2n3n4

00:00 to 24:00 will adjust its time for the end of daylight saving time.

1 to 1440 minutes daylight saving time.

only one broadcast acknowledger in a CCN. Warning: if the unit operates in standalone mode (not CCN connected) this choice must be set to Yes if the holiday function is used

(see section 4.5.7.8) or if you want to configure the daylight saving time function.

broadcast on the CCN. When it is set to No, the control is not the broadcaster and there is no need to configure the other choice in this table. There must be only one broadcaster in a CCN and this item should not be configured if any other system element is acting as broadcaster.

Warning: if the unit operates in standalone (not CCN connected) this choice must be set to Yes if the holiday function is used (see section 4.5.7.8) or if you want to configure the daylight saving time function.

Authorises entering the hours and minutes for saving start. In this mode you enter the time of day when the broadcaster will

n1n2: hours (00 to 24). The first time the Enter button is continuously pressed, the first two characters in the 4-digit display flash so that hours can be adjusted. n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash so that minutes can be adjusted.

Authorises entering the hours and minutes for saving stop. In this mode you enter the time of day when the broadcaster

: hours (00 to 24). The first time the Enter button is continuously pressed, the first two characters in the 4-digit display flash so that hours can be adjusted.

1n2

n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash so that minutes can be adjusted.

4.5.8 - Description of the Alarms menu

This menu is used to display and reset up to 5 active alarms. It also permits alarm reset. If no alarm is active this menu is not accessible. See section 6 for a complete description of the alarm codes and alarm reset.

ALARMS MENU ITEM # FORMAT DESCRIPTION

0 [1] X ALArM X alarms are active

rESEt ALArM Reset of alarms is requested

To reset all active alarms, continuously press the Enter key. ‘rESET ALArM’ is then displayed. Press the select

key again: all alarms are reset. 1 [1] nn Current alarm code 1* 2 [1] nn Current alarm code 2* 3 [1] nn Current alarm code 3* 4 [1] nn Current alarm code 4* 5 [1] nn Current alarm code 5*

Legend 1 This item is masked when nil * Pressing the Enter key when alarm code is displayed causes the following

message to be scrolled: “time of alarm” “date of alarm” “full CCN alarm message”

- “time of alarm”: hh-mm

- “date”: dd-mm

- “full CCN alarm message”: up to 64 characters

4.5.9 - Description of the Alarms History menu

ALARMS HISTORY MENU ITEM # FORMAT COMMENTS

1 [1] nn Alarm history code 1* 2 [1] nn Alarm history code 2* 3 [1] nn Alarm history code 3* 4 [1] nn Alarm history code 4* 5 [1] nn Alarm history code 5* 6 [1] nn Alarm history code 6* 7 [1] nn Alarm history code 7* 8 [1] nn Alarm history code 8* 9 [1] nn Alarm history code 9* 10 [1] nn Alarm history code 10*

Legend

1 This item is masked when nil * Pressing the Enter key when alarm code is displayed causes the following

message to be scrolled: “time of alarm” “date of alarm” “full CCN alarm message”

- “time of alarm”: hh-mm

- “date”: dd-mm

- “full CCN alarm message”: up to 64 characters

Page 26

4.5.10 - Runtime menu description

4.5.10.2 - Description of the Runtimes 2 menu

RUNTIMES

RUNTIMES 1

[runtiMES 1]

RUNTIMES 2 [runtiMES 2]

MAINTENANCE

[MAintEnAnCE]

NOTE: The items in brackets show what is displayed on the user interface.

4.5.10.1 - Description of the Runtimes 1 menu

RUNTIMES MENU [1] iTEM # FORMAT UNIT COMMENTS

0 - - When selected this item

1 nnnn | M 10 | M100 hrs/10 or 100 Unit operating hours* 2 nnnn | M 10 | M100 hrs/10 or 100 Compressor A1 operating hours* 3 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor A2 operating hours* 4 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor A3 operating hours* 5 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor A4 operating hours* 6 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor B1 operating hours* 7 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor B2 operating hours* 8 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor B3 operating hours* 9 [1] nnnn | M 10 | M100 hrs/10 or 100 Compressor B4 operating hours* 10 nnnn | M 10 | M100 -/10 or 100 Machine starts* 11 nnnn | M 10 | M100 -/10 or 100 Compressor A1 starts* 12 [1] nnnn | M 10 | M100 -/10 or 100 Compressor A2 starts* 13 [1] nnnn | M 10 | M100 -/10 or 100 Compressor A3 starts* 14 [1] nnnn | M 10 | M100 -/10 or 100 Compressor A4 starts* 15 [1] nnnn | M 10 | M100 -/10 or 100 Compressor B1 starts* 16 [1] nnnn | M 10 | M100 -/10 or 100 Compressor B2 starts* 17 [1] nnnn | M 10 | M100 -/10 or 100 Compressor B3 starts* 18 [1] nnnn | M 10 | M100 -/10 or 100 Compressor B4 starts*

NOTES

1 This item is masked when not used * Certain values are divided by 10 or by 100, so that number of hours or start-

ups of less then 10 are displayed as 0. When the value is divided by 10 or by 100 it is displayed in turn with “M 10” or

“M100”.

authorises return to the previous menu

RUNTIMES MENU [2] iTEM # FORMAT UNIT COMMENTS

0 - - When selected this item

authorises return to the previous

menu 1 nnnn | M 10 | M100 hrs/10 or 100 Pump #1 operating hours* 2 nnnn | M 10 | M100 hrs/10 or 100 Pump #2 operating hours* 3 [1] nnnn | M 10 | M100 hrs/10 or 100 Condenser pump operating

hours 4 [1] nnnn - Number of start-ups for the

compressor with the highest

number during the last hour 5 nnnn - Average number of compressor

start-ups/hour for the last 24

hours

4.5.10.3 - Maintenance menu description

To be active, the maintenance function must be preset in the Service configuration.

ITEM # FORMAT DESCRIPTION

0 MAintEnAnCE MEnu When selected this item authorises return to the

previous menu. 1 [1] Accessible with the Service password. 2 [1] For future use 3 [1] For future use 4 [1] ALErt Water loop rate to low 5 [1] nnn/ALErt Next primary pump maintenance operation in nnn

days. 'ALErt' is displayed, when the delay before

maintenance has elapsed. 6 [1] nnn/ALErt Next secondary pump maintenance operation in

nnn days. 'ALErt' is displayed, when the delay

before maintenance has elapsed. 7 [1] nnn/ALErt Next water filter maintenance operation in nnn

days. 'ALErt' is displayed, when the delay before

maintenance has elapsed.

Legend

1 This item is masked when not used.

Page 27

5 - PRO-DIALOG PLUS CONTROL OPERATION

5.1 - Start/stop control

The table below summarises the unit control type and stop or go status with regard to the following parameters.

- Operating type: this is selected using the start/stop button

on the front of the user interface.

- Remote start/stop contacts: these contacts are used when

the unit is in remote operating type (rEM). See sections

3.6.2 and 3.6.3.

- CHIL_S_S: this network command relates to the chiller

start/stop when the unit is in CCN control (CCn). Variable forced to disable: the unit is halted. Variable forced to Enable: the unit runs in accordance with schedule 1.

- Start/Stop schedule: occupied or unoccupied status of the

unit as determined by the chiller start/stop program (Schedule #1). Used when the unit is equipped with an optional CCN/clock board, otherwise the chiller occupied mode is forced to occupied all the time.

- Master control type. This parameter is used when the

unit is the master unit in a two chiller lead/lag arrangement. The master control type determines whether the unit is to be controlled locally, remotely or through CCN (this parameter is a Service configuration).

- CCN emergency shutdown: if this CCN command is

activated, it shuts the unit down whatever the active operating type.

- General alarm: the unit is totally stopped due to failure.

ACTIVE OPERATING TYPE STATUS OF PARAMETERS CONTROL UNIT

REMOTE MASTER ST AR T/STOP CCN GENERAL START/STOP CONTROL SCHEDULE EMERGENCY ALARM

LOFF L-ON L-SC rEM CCN MASt CHIL_S_S CONTACT TYPE MODE SHUTDOWN

- - - - - - - - - - Enable - - Off

------- - -. -. - Yes - Off Active - - - - - - - - - - - Local Off

- - Active - - - - - - Unoccupied - - Local Off

- - - Active - - - Off - - - - Remote Off

- - - Active - - - - - Unoccupied - - Remote Off

- - - - Active - Disable - - - - - CCN Off

- - - - Active - - - - Unoccupied - - CCN Off

- - - - - Active - - Local Unoccupied - - Local Off

- - - - - Active - Off Remote - - - Remote Off

- - - - - Active - - Remote Unoccupied - - Remote Off

- - - - - Active Disable - CCN - - - CCN Off

- - - - - Active - - CCN Unoccupied - - CCN Off

- Active - - - - - - - - Disable No Local On

- - Active - - - - - - Occupied Disable No Local On

- - - Active - - - On - Occupied Dsable No Remote On

- - - - Active - Enable - - Occupied Disable No CCN On

- - - - - Active - - Local Occupied Disable No Local On

- - - - - Active - On Remote Occupied Disable No Remote On

- - - - - Active Enable - CCN Occupied Disable No CCN On

TYPE MODE

5.2 - Heating/cooling selection

On heat pumps, heating/cooling selection can be controlled differently depending on the active operating type:

• Locally on the unit, using operating types L-C1, L-C2, LC1r and LC2r (for cooling) and L-H (for heating).

• Remotely using the heat/cool selection volt-free contact when the unit is in Remote operating type (rEM).

• Via a CCN command when the unit is in CCN operating type (CCn).

PARAMETER STATUS

ON/OFF STATUS

Off On On On On On On

CONTROL TYPE

Local Local Remote Remote CCN CCN

HEATING/COOLING SELECTION IN LOCAL MODE

Cooling Heating

The current heat/cool operating mode on the unit is indicated by item 4 in the Information menu and by the heat/cool LEDs on the summary interface.

REMOTE HEATING/ COOLING CONTACTS

Cooling mode Heating mode

HC_SEL

Cooling Heating

OPERATING MODE

Cooling Cooling Heating Cooling Heating Cooling Heating

Page 28

5.3 - Evaporator water pump control

5.5 - Control interlock contact

The unit can control one or two evaporator water pumps. The evaporator water pump is turned on when this option is configured (see User configuration) and when the unit is in one of the on modes described above or in delay mode. Since the minimum value for the delay at start-up is 1 minute (configurable between 1 and 15 minutes), the pump will run for at least one minute before the first compressor starts.

The pump is kept running for 20 seconds after the unit goes to stop mode. The pump keeps working when the unit switches from heating to cooling mode or vice-versa. It is turned off if the unit is shut down due to an alarm unless the fault is a frost protection error.

The pump can be started in particular operating conditions when the evaporator heater is active. See section 5.19 for the particular evaporator pump control for the follower unit (master/slave assembly). If two pumps are controlled and the reversing function has been selected (see User 1 configuration), the control tries to limit the pump run time delta to the configured pump change-over delay. If this delay has elapsed, the pump reversing function is activated, when the unit is running. During the reversing function both pumps run together for two seconds. If a pump has failed and a secondary pump is available, the unit is stopped and started again with this pump.

This contact can control the status of the water loop. Its function is to prevent unit start-up, if it is open and if the startup delay has passed. Furthermore, this contact must remain closed when the unit is not in local off, remote or CCN control mode. Opening this contact for more than 8 seconds while the unit is operating, will cause immediate shut-down of the faulty unit.

5.6 - Evaporator heater control

The evaporator heater can be activated to protect an evaporator that may be damaged by ice, if the unit is shut down for a long period at low outdoor air temperature. If the heater is not sufficient to increase the water temperature, the evaporator pump can be started.

NOTE: The evaporator heater control parameters may be modified using the Service Configuration menu.

5.7 - Control point

Control point represents the leaving water temperature that the unit must produce.

• In cooling mode: control point = active setpoint + reset

• In heating mode: control point = active setpoint - reset

The control provides a means to automatically start the pump each day at 14.00 hours for 2 seconds when the unit is off. If the unit is fitted with two pumps, the first pump is started on odd days and the second pump is started on even days. Starting the pump periodically for few seconds increases the life-time of the pump bearings and the tightness of the pump seal.

NOTE: If this function is used, there should not be any chilled water pump interlock between terminals 34 and 35 (see section 3.4).

5.4 - Condenser water pump control

Only available on water-cooled units and air-cooled units with heat reclaim.

The condenser pump can be controlled by two modes, depending on the configuration (only accessible by Carrier Service). 1 - Control based on unit start/stop control. In this case it is

controlled in the same way as the evaporator pump.

2 - Control based on compressor status. In this case the pump

is activated at the same time as the first compressor. It only switches off when no compressor is activated.

5.7.1 - Active setpoint

Two setpoints can be selected as active in cooling mode. Usually , the second setpoint is used for unoccupied periods or for ice storage (medium or low brine unit). A single setpoint is available in heating mode.

Depending on the current operating mode, the active setpoint can be selected with the operating type selector button, or with the user’s volt-free contacts, or with network commands (see section 3.4).

5.7.2 - Reset

Reset means that the active setpoint is modified so that less machine capacity is required (in cooling mode, the setpoint is increased, in heating mode it is decreased). This modification is in general a reaction to a drop in the load. For the Pro-Dialog Plus control system, the source of the reset can be configured in the User 1 configuration: it can be based on an external 0-10 V signal, provided either by the outdoor temperature (that gives a measure of the load trends for the building) or by the return water temperature (delta T that gives an average building load). In response to a drop in the outdoor temperature or to a drop in delta T, the cooling setpoint is normally reset upwards in order to optimise unit performance:

In both cases the reset parameters, i.e. slope, source and maximum value, are configurable in the Setpoints menu (see section

4.5.4). Reset is a linear function based on three parameters.

• A reference at which reset is zero (outdoor temperature or delta T - no reset value).

• A reference at which reset is maximum (outdoor temperature or delta T - full reset value).

• The maximum reset value.

Page 29

5.8 - Demand limit

Generally, demand limit is used by an energy management system in order to restrict the unit electricity consumption.

NOTE: If the same compressor undergoes too many starts (per hour) this automatically brings about reduction of compressor starts, which makes leaving water temperature control less precise.

The PRO-DIALOG Plus control system for 30GX & 30HX provides two methods of demand limit:

• By reference to a limiting signal from a user-controlled volt-free contact: the capacity of the unit cannot exceed the demand limit setpoint (which can be modified in the Setpoints menu) when the limit contact is closed.

• By reference to an external 0-10 V d.c. signal: the capacity of the unit cannot exceed the demand limit imposed by this external signal. It is a linear function and its para-meters are configurable in the User1 menu (voltages at 0% limitation and 100% of limitation). This function is not available if Reset by reference to an external 0-10 V d.c. signal has already been selected.

Whatever the method used, demand limit is active in all operating types: Local, Remote or CCN. However, in Local operating type, demand limit can be disabled with keypad commands (see section 4.3.3) and in CCN operating type, demand limit can be controlled directly with the aid of CCN commands.

NOTE: A limitation value of 100% means that the unit may call upon the full array of its capacity stages.

Here is an example of demand limit by an external 0-10 V d.c. signal. This example assumes that the limitation parameters are such that at 0 volt the authorised capacity shall be maximum capacity, and at 10 volts the authorised capacity shall be zero (this is the default configuration).

Demand limit by 0-10 V d.c. signal

No demand limit

5.10 - Determining the lead circuit

This function commands the start/stop sequence of the two refrigerant circuits called A and B. The circuit authorised to start first is the lead circuit. Three methods can be configured by the user in the Configuration menu:

• Auto mode: the control system determines the lead circuit

so as to equalise the number of starts on each circuit (value weighted by the operating times of each circuit). Thus, the circuit with the least number of starts is always given precedence to start. The lead circuit is stopped last. This function is only available in two-circuit units.

NOTE: If one circuit has more unloaders than the other, this circuit is always the lead circuit, independent of the configuration and the operating hours of the two circuits.

• Circuit A as leader: Circuit A is always the lead circuit.

It is the first to start and the last to stop.

• Circuit B as leader: Circuit B is always the lead circuit.

It is the first to start and the last to stop. This choice is only available in two-circuit units.

5.11 - Circuit loading sequence

Two circuit loading sequences are available. The choice of sequence can be configured by the user in the Configuration menu (see section 4.5.7.3). This function is only available in two-circuit units.

• Balanced circuit loading: If this sequence is selected, the

control system tries to keep the capacity of circuits A and B equal as the total load on the unit increases or decreases.

• Loading with priority given to one circuit: If this

sequence is selected, the control system loads the lead circuit completely before the second circuit starts up. When there is a demand limit, the second circuit is unloaded first.

Total demand limit

capacity

Maximum permitted

0-10 V dc demand limit

5.9 - Capacity control

This function activates the compressors and capacity unloaders to keep the entering or leaving water temperature at its setpoint. The precision with which this is achieved depends on

the capacity of the water loop, the flow rate, the load, and the number of stages available on the unit.

The control system continuously takes account of the temperature error with respect to the setpoint, as well as the rate of change in this error and the difference between entering and leaving water temperatures, in order to determine the optimum moment at which to add or withdraw a capacity stage.

NOTE: If the unit is air-cooled and if the saturated condensing temperature of one of the two circuits is lower than 0°C at the start-up of one circuit, the priority capacity loading sequence of the circuits is used by the control, independent of the configuration.

Page 30

5.12 - Slave compressor start-up sequence

5.15 - Head pressure control on water-cooled units

Lag compressors are started and stopped in a sequence designed to equalise their number of start-ups (value weighted by their operating time).

5.13 - Controlling the EXV

EXVs, if used, control the flow of refrigerant in the evaporator. They are controlled in order to maintain a constant level of superheat at the thermistor for the lead compressor inlet gas (located between the compressor motor and the cylinders).

A thermistor and a pressure sensor, in the lead compressor of each circuit, are used to measure this superheat. The thermistor measures the temperature of the superheated gas entering the cylinders. The pressure sensor measures the suction gas pressure. The controller converts this value into a saturated temperature. The difference between the superheated gas temperature and the saturated temperature is the superheat. The control system sets the position of the EXV to hold this superheat at the setpoint configured for the unit.

Since the EXVs are driven by the controller their positions are always known. During start-up of a circuit its EXV is fully closed to ensure pump down. After pump down, the system continuously controls and monitors the valve position. Similarly, on shutdown of a circuit the EXV is closed again to ensure pumping down.

EXVs are also used to restrict suction temperature, making it possible to start the unit at higher water and suction temperatures without overloading the compressors. This procedure controls what is known as Maximum Operating Pressure (MOP).

5.14 - Head pressure control on air-cooled units

There are two methods, configurable only by Carrier Service, for controlling the condenser fans:

• Controlling condensation by reference to a setpoint (default): The saturated head pressure is controlled by reference to a fixed setpoint (user-definable in the Setpoints menu). This temperature is maintained by cycling fans on and off, as well as by varying the speed of a fan in appropriate cases.

• Controlling condensation by reference to the position of the EXV: The saturated head pressure is controlled by reference to the position of the EXV and the superheat, by cycling fans on and off as well as by varying the speed of a fan in appropriate cases. The control system seeks to keep the EXVs as wide open as possible whilst maintaining the correct level of superheat with the fans. When the second condensing setpoint is selected (reclaim setting), the control system will automatically revert to controlling by reference to a setpoint even if control by reference to the EXV has been selected. The original configuration is reinitialised when the first condensing setpoint is re-selected.

There are two configurable methods for controlling the condenser water valves (optional):

• Controlling head pressure by reference to a setpoint:

Saturated head pressure is controlled by reference to a userdefinable fixed setpoint. This temperature is maintained by using the valves to control the flow of water in each condenser circuit.

• Controlling head pressure by reference to the position of the EXV: Saturated head pressure is controlled by reference to the position of the EXV and the superheat, by adjusting the flow of water in each condenser circuit. The valve control system seeks to keep the EXVs as wide open as possible whilst maintaining the correct level of superheat. When the second head pressure setpoint is selected (reclaim setting), the control system will automatically revert to controlling by reference to a setpoint even if control by reference to the EXV has been selected. The original configuration is reinitialised when the first head pressure setpoint is reselected.

5.16 - Active setpoint selection

Two setpoints can be selected as active in cooling mode, and one setpoint in heating mode. Usually , the second cooling setpoint is used for unoccupied periods or for ice storage (brine unit). Depending on the current operating mode, the active setpoint can be selected either by choosing the item in the Information menu. or with the user volt-free contacts, or with network commands, or by the setpoint time schedule program (Schedule 2).

The following tables show a summary of the possible selctions as a function of the control typpes (local, remote or network), and the parameters below:

• Local setpoint selection: item No. 11 of the Information

Menu permits selection of the active setpoint, if the unit is in the local operating type.

• Heating/cooling operating mode.

• Control contacts: status of the remote heating and

cooling control contact. This contact is only active, if the unit is under remote operating control. See section 3.6.6.

• Schedule 2 program status: schedule program for

setpoint selection. See section 4.3.11.6.

NOTE Certain units can have up to 8 fan stages, of which one per circuit is a variable-speed fan, depending on their configuration and wiring.

Page 31

LOCAL OPERATING MODE PARAMETER STATUS

HEATING/ COOLING OPERA TING MODE

cooling cooling heating holidays holidays

REMOTE OPERATING MODE PARAMETER STATUS HEATING/

COOLING OPOERA TING MODE

heating cooling cooling

CCN OPERATING MODE PARAMETER STATUS

HEA TING/COOLING OPERATING MODE

cooling cooling heating

LOCAL SETPOINT SELECTION

sp 1 sp2

auto auto

CONTROL CONTACT

sp 1 sp2 holidays holidays

SCHEDULE 2 PROGRAM STATUS

occupied unoccupied

SCHEDULE 2 PROGRAM STATUS

occupied unoccupied

SCHEDULE 2 PROGRAM STATUS

occupied unoccupied

ACTIVE SETPOINT

cooling setpoint 1 cooling setpoint 2 heating setpoint cooling setpoint 1 cooling setpoint 2

ACTIVE SETPOINT

heating setpoint cooling setpoint 1 cooling setpoint 2 cooling setpoint 1 cooling setpoint 2

ACTIVE SETPOINT

cooling setpoint 1 cooling setpoint 2 heating setpoint

5.17 - High pressure load shedding function

All control commands to the master/slave assembly (start/stop, setpoint, heating/cooling operation, load shedding, etc.) are handled by the unit which is configured as the master, and must therefore only be applied to the master unit. They will be transmitted automatically to the slave unit. The master unit can be controlled locally, remotely or by CCN commands. Therefor e to start up the assembly, simply validate the Master operating type (MASt) on the master unit. If the Master has been configured for remote control then use the remote volt-free contacts for unit start/stop. The slave unit must stay in CCN operating type continuously. To stop the master/slave assembly, select Local Off (LOFF) on the master unit or use the remote voltfree contacts if the unit has been configured for remote control.

One of the functions of the master unit (depending on its configuration) may be the designation, whether the master or slave is to be the lead machine or the follower . The roles of lead machine and follower will be reversed when the difference in running hours between the two units exceeds a configurable value, ensuring that the running times of the two units are automatically equalised. The changeover between lead machine and follower may take place when the assembly is started up, or even whilst running. The running time balancing function is not active if it has not been configured: in this case the lead machine is always the master unit.

This function does not require an additional board. It prevents high pressure a break on a circuit by the following means:

• Preventing any capacity increase on the circuit once the high pressure value has reached an initial threshold.

• Shedding one or more capacity stages once a second protection threshold has been reached.

In the event of capacity stages being shed, no capacity increase will be authorised on the circuit concerned for a period of 5 minutes.

5.18 - Pumping down

When the lead compressor in each circuit is started or stopped, that circuit goes through a pumping down cycle to purge the evaporator and suction line of refrigerant. The maximum duration of this cycle is 3 minutes.

5.19 - Master/slave assembly

Two PRO-DIALOG Plus units can be linked to produce a master/ slave assembly. The two machines are interconnected over the CCN bus. All parameters required for the master/slave function must be configured through the Service configuration menu.

The lead machine will always be started first. When the lead machine is at its full available capacity, start-up delay (configurable) is initialised on the follower. When this delay has expired, and if the error on the control point is greater than 1.7°C, the follower unit is authorised to start and the pump is activated. The follower will automatically use the master unit active setpoint. The lead machine will be held at its full available capacity for as long as the active capacity on the follower is not zero. When the follower unit receives a command to stop, its evaporator water pump is turned off with 20 seconds delay.

In the event of a communication fault between the two units, each shall return to an autonomous operating mode until the fault is cleared. If the master unit is halted due to an alarm, the slave unit is authorised to start without prior conditions.

5.20 - Controlling Pro-Dialog Plus units with a System Manager

Up to eight PRO-DIALOG Plus units (or System Manager compatible units) can be controlled by one control module of the FSM or CSM III type which can handle multi-tasking of control functions such as starting units in sequence.

Master/slave operation requires the connection of a temperature probe at the common manifold on each machine, if the heat exchanger leaving water temperature is controlled.

The master/slave assembly can operate with constant or variable flow. In the case of variable flow each machine must control its own water pump and automatically shut down the pump, if the cooling capacity is zero. For constant flow operation the pumps for each unit are continuously operating, if the system is operating. The master unit can control a common pump that will be activated, when the system is started. In this case the slave unit pump is not used.

Page 32

5.21 - Optional heat reclaim module

6 - DIAGNOSTICS - TROUBLESHOOTING

Change-over procedure from cooling mode to heat reclaim mode:

• Start-up of the condenser pump

• Verification of the condenser flow switch control contact. If this remains open after one minute of condenser pump operation, the circuit remains in cooling mode and alarm 79 for circuit A (alarm 80 for circuit B) will be activated.

• As soon as the saturated condensing temperature reaches 30°C, the pumpdown sequence is activated.

• Pumpdown: closing of the cooling mode coil shutoff valve. Opening of the drain valve, closing of the EXV valve.

• When the pumpdown pressure reaches the end of the pumpdown threshold, the pumpdown valve is closed and the heat reclaim function is effective.

6.1 - General

The PRO-DIALOG Plus control system has many fault tracing aid functions. The local interface and its various menus give access to all unit operating conditions. The test function makes it possible to run a quick test of all devices on the unit. If an operating fault is detected, an alarm is activated and an alarm code is stored in the Alarm menu.

6.2 - Displaying alarms

The alarm LEDs on the summary interface (see section 4.1) give a quick display of the status of each circuit and the unit as a whole.

• A flashing LED shows that the circuit is operating but there is an alarm.

• A steady LED shows that the circuit has been shut down due to a fault.

The Alarm menu on the main interface displays up to 5 fault codes that are active on the unit.

6.3 - Resetting alarms

When the cause of the alarm has been corrected the alarm can be reset, depending on the type, either automatically on return to normal, or manually when action has been taken on the unit. Alarms can be reset even if the unit is running.

This means that an alarm can be reset without stopping the machine. In the event of a power supply interrupt, the unit restarts automatically without the need for an external command. However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or a unit from restarting.

A manual reset must be run from the main interface using the following procedure:

RESET OF ACTIVE ALARMS OPERATION ITEM NUMBER ITEM VALUE PRESS MENU

Hold down the MENU button until the LED 0 for alarms lights. The 4-digit display shows 0 2 ALArM the number of active alarms (2 in this example).

Press the Enter button 0 rESEt ALArM until "rESEt ALARrM" is shown in the 4-digit display.

Press the Enter button 0 Good again to validate the then, 2 AL reset. "Good" is dis- then, no ALArM played for 2 seconds then, "2 ALArM" and then, "no ALArM".

2-DIGIT DISPLAY 4-DIGIT DISPLAY BUTTON LED

Page 33

6.4 - Alarm codes

The following list gives a complete description of each alarm code and its possible cause.

ALARM CODE DESCRIPTIONS Code Alarm name Description Action Pumpdown Reset type Probable cause

1 Evaporator leaving water thermistor fault Thermistor outside range Unit shut down Yes Auto Thermistor or wiring fault or

2 Evaporator entering water thermistor fault Ditto Unit shut down Yes Auto Ditto 3 Condenser leaving water thermistor fault Ditto Heating mode: Unit shut down, Yes Auto Ditto

4 Condenser entering water thermistor fault Ditto Heating mode: Unit shut down, - Auto Ditto

5 Heat reclaim entering water thermistor fault Ditto Unit with heat recalaim option: - Auto Ditto

6 Heat reclaim leaving water thermistor fault Ditto None - Auto Ditto 7 Outdoor temperature sensor fault Ditto Reset: normal setpoint used. - Auto, if temp. mea- Thermistor faulty

8 CHWS (master/slave) fluid thermistor fault Ditto Deactivated - Ditto Themistor faulty 9 Suction thermistor fault, compressor A1 Ditto Circuit A shut down Yes Auto Ditto 10 Suction thermistor fault, compressor B1 Ditto Circuit B shut down Yes Auto Ditto 11 External 0-10 V dc signal fault Reset signal outside range Reset: normal setpoint used No Auto Signal incorrect, wiring error

12 Discharge pressure sensor fault, circuit A Voltage transmitted by incorrect sensor Circuit A shut down Yes Auto Sensor fault or wiring error 13 Discharge pressure sensor fault, circuit B Ditto Circuit B shut down Yes Auto Ditto 14 Suction pressure sensor fault, circuit A Ditto Circuit A shut down No Auto Ditto 15 Suction pressure sensor fault, circuit B Ditto Circuit B shut down No Auto Ditto 16 Oil pressure sensor fault, compressor A1 Ditto Circuit A shut down No Auto Ditto 17 Oil pressure sensor fault, compressor B1 Ditto Circuit B shut down No Auto Ditto 18 Oil pressure sensor fault, compressor A2 Ditto Compressor A2 shut down - Auto Ditto 19 Oil pressure sensor fault, compressor B2 Ditto Compressor B2 shut down - Auto Ditto 20 Oil pressure sensor fault, compressor A3 Ditto Compressor A3 shut down - Auto Ditto 21 Oil pressure sensor fault, compressor B3 Ditto Compressor B3 shut down - Auto Ditto 22 Oil pressure sensor fault, compressor A4 Ditto Compressor A4 shut down - Auto Ditto 23 Oil pressure sensor fault, compressor B4 Ditto Compressor B4 shut down - Auto Ditto 24 Pumpdown pressure sensor fault, circuit A Ditto If circuit is in heat reclaim - Auto, if press. mea-

25 Pumpdown pressure sensor fault, circuit B Ditto Ditto - Ditto Ditto 26 Loss of communication with compressor board A1 Communication with the compressor Circuit A shut down No Auto Wiring fault, faulty module,

27 Loss of communication with compressor board A2 Ditto Compressor A2 shut down No Auto Ditto 28 Loss of communication with compressor board A3 Ditto Compressor A3 shut down No Auto Ditto 29 Loss of communication with compressor board A4 Ditto Compressor A4 shut down No Auto Ditto 30 Loss of communication with compressor board B1 Ditto Circuit B shut down No Auto Ditto 31 Loss of communication with compressor board B2 Ditto Compressor B2 shut down No Auto Ditto 32 Loss of communication with compressor board B3 Ditto Compressor B3 shut down - Auto Ditto 33 Loss of communication with compressor board B4 Ditto Compressor B4 shut down - Auto Ditto 34 Loss of communication with EXV board Ditto Unit shut down No Auto Wiring bus faulty, incorrect

35 Loss of communication with NRCP board The board does not respond Unit shut down, if heat reclaim mode No Auto, if board is NRCP board faulty

36 Loss of communication with fan board 1 Ditto Unit shut down, if the number of No Auto Wiring bus faulty, incorrect

37 Loss of communication with fan board 2 Ditto Circuit B shut down No Auto Ditto 38 Loss of communication with 4xAI - 2xAO board 1 Ditto Unit shut down or no action No Auto Ditto, depending on

39 Loss of communication with 4xAI - 2xAO board 2 Ditto Compressors or circuit shut down No Auto Ditto, depending on

40 Pumpdown fault, circuit A End of pumpdown conditions not Circuit A shut down No Manual EXV or sensor faulty

41 Pumpdown fault, circuit B Ditto Circuit B shut down No Manual Ditto 42 Evaporator frost protection Unit operating: units shut down if Unit shut down No Auto first time, Low water flow or

43 Low evaporator water flow rate. Unit shut down No Manual Water pump faulty 44 Low suction temperature, circuit A Circuit operating: saturated suction Circuit A shut down No Manual Low charge, filter dirty

45 Low suction temperature, circuit B Ditto Circuit B shut down No Manual Ditto 46 High suction overheat, circuit A EXV fully open Circuit A shut down Yes Manual Ditto 47 High suction overheat, circuit B Ditto Circuit B shut down Yes Manual Ditto 48 Low suction overheat, circuit A EXV in min. position, and circuit Circuit A shut down Yes Manual EXV or thermistor or

board is lost incorrect module address

satisfied

temp. < defrost threshold. then manual thermistor defective Unit shut down: if temp < threshold and evaporator heater on for more than 10 mins.

temp. < defrost threshold and < leaving ot thermistor faulty water -16°C for more than 10 mins.

superheat below superheat setpoint transducer defective

-5.5 K, saturated suction temp. above MOP for 5 mins.

if control on leaving water. Cooling mode: no action

if control on entering water. Cooling mode: no action

heat reclaim mode shut down, unit changes over to standard cooling mode. If not: no action

Limitation or reset deactivated. sured by sensor

Limitation or reset deactivated

mode, it goes to cooling mode. sured by sensor If not, no action returns to normal

is selected again detected

fan stages per circuit is less than 3. address or board faulty If not, circuit A shut down

returns to normal

bad connection

address or board faulty

configuration

Page 34

ALARM CODE DESCRIPTIONS Code Alarm name Description Action Pumpdown Reset type Probable cause

49 Low suction overheat, circuit B Circuit B shut down Yes Manual Ditto 50 Low oil pressure, compressor A1 Oil pressure < min. threshold Circuit A shut down No Manual Compressor, crankcase

51 Low oil pressure, compressor B1 Ditto Circuit B shut down No Manual Ditto 52 Low oil pressure, compressor A2 Ditto Compressor A2 shut down Manual Ditto 53 Low oil pressure, compressor B2 Ditto Compressor B2 shut down Manual Ditto 54 Low oil pressure, compressor A3 Ditto Compressor A3 shut down Manual Ditto 55 Low oil pressure, compressor B3 Ditto Compressor B3 shut down Manual Ditto 56 Low oil pressure, compressor A4 Ditto Compressor A4 shut down Manual Ditto 57 Low oil pressure, compressor B4 Ditto Compressor B4 shut down Manual Ditto 58 Evaporator water flow control fault 1. Interlock not closed before end Unit shut down. No Manual Evaporator water flow fault

59 Low pressure fault, circuit A Circuit operating, and suction pressure Circuit A shut down No Auto first time, Low refrigerant charge, EXV

60 Low pressure fault, circuit B Ditto Circuit B shut down No Ditto Ditto 61 Repeated high pressure load sheds, circuit A More than 6 successive capacity load None No Auto Transducer faulty, condenser

62 Repeated high pressure load sheds, circuit B Ditto Ditto Ditto Ditto 63 High pressure switch not reset or reverse compressor The high pressure switch has not been Circuit A shut down No Manual The high pressure switch has

rotation, circuit A reset after a high pressure cut-out, not been reset, poor electrical

64 High pressure switch not reset or reverse compressor Ditto Circuit B shut down No Manual Ditto

rotation, circuit B

65 Control box thermostat fault Sensor overheat Unit shut down Manual Control box poorly

66 Loss of communication with System Manager Units controlled by SM, and Unit operates in autonomous mode Auto CCN network fault

67 Loss of communication with the master or slave Master/slave connection interrupted Unit operates in autonomous mode Auto CCN network fault

68 Master/slave configuration error Poor master/slave configuration Master/slave control not allowed Auto/manual in Master/slave configuration

69 Initial factory configuration necessary All factory parameters are at zero Unit prevented from starting Auto No factory configuration 70 Poor factory configuration. Poor factory configuration Ditto Ditto Factory configuration error

1. Compr. A3 configured and A2 absent

2. Compr. A4 configured and A2 or A3 absent

3. No lead compr. in circuit B

4. Compr. B3 configured and B2 absent

5. Compr. B4 configured and B2 or B3 absent

6. Difference of compressors in circ. A and B too high

7. Fan configured for a water-cooled condenser

8. No fans configured

9. Heat reclaim option configured, and heat reclaim sensors not configured

71 CCN/Clock Board fault The CCN/Clock Board is no longer Unit shut down No Auto, if the board CCN/Clock Board faulty

72 Emergency stop An emergncy stop commend has been Unit shut down No CCN CCN network command

73 Pump No. 1 fault Evaporator water pump operating Unit shut down No Manual Pump overheat or poor

74 Pump No. 2 fault Ditto Unit shut down No Manual Ditto 75 Condenser anti-freeze protection, circuit A Saturated temperature is under the Unit shut down. Condenser pump No Auto Discharge pressure trans-

76 Condenser anti-freeze protection, circuit B Ditto Ditto No Auto Ditto 77 Lack of water flow, condenser Water flow switch (water-cooled units) Unit shut down No Manual Condenser pump, low water

78 Condenser water flow fault, heat reclaim mode Ditto Units stays in cooling mode No Manual Ditto

of start-up delay Pump shut down

2. Pump shut down for 2 mins and water flow contact closed

below permitted threshold for more then manual* faulty or filter dirty than 3 mins.

sheds in the circuit due to exceeded ent. air temp., evaporator ent. high pressure water temp. too high, cond.

or the lead compressor does not work connection of lead compr.

communication with the module over 2 mins. faulty

beween the two units for more than 2 mins.

case of heating/ fault cooling fault

detected is again detected

transmitted by the CCN network.

contact open, when the pump has pump connection received a commmand to operate.

frost cut-out point started, if unit is shut down ducer faulty, refrigerant leak,

not closed for 1 min. flow, water flow switch

heater, pressure sensor or EXV faulty, refrigerant charge too high, low oil charge

blocked or fan flow rate too low

ventilated

or low cond. water temp.

79 Heat reclaim mode fault, circuit A More than two consecutive pumpdown Circuit A stays in cooling mode No Manual Leak or heat reclaim or drain

80 Heat reclaim mode fault, circuit B Ditto Circuit B stays in coolng mode No Manual Ditto 81 High pressure fault, circuit A Circuit operating and discharge pressure Unit shut down No Manual, the high Fan circuit fault, air or

82 High pressure fault, circuit B Ditto Ditto No Ditto Ditto 83 Maintenance alert A maintenance alert is active None Manual

1. Charge too low

2. Water loop too low

3. Air filter maintenance delay elapsed

4. Pump 1 maintenance delay elapsed

5. Pump 2 maintenance delay elapsed

6. Water filter maintenance delay elapsed

sequences not successful solenoid shut-off valve fault

exceeds the high pressure cut-out point pressure command condenser temperature too

must be reset high manually by the button on the HP pressure switch

Page 35

6.4.1 - Compressor faults

6.4.1.1 - General

Each compressor is protected against multiple faults by two

DGT (only for units with low-temperature option):

The discharge gas thermostat detects and protects the

compressor against abnormally high discharge temperatures. digital inputs located on the control board. If one of these inputs opens, it causes an immediate shutdown on the compressor without any action from the basic board.

Starter Guard:

This board patented by Carrier (also called AM board)

monitors both the compressor regime and the status of its

6.4.1.2 - Compressor protection devices

On PRO-DIALOG Plus units, compressors are individually

crankcase heaters which ensure correct lubrication when the

compressor starts. protected by the following devices connected to the digital inputs on the compressor control board:

ALARM CODE DESCRIPTIONS Code Alarm name Action Pumpdown Reset type Probable cause

101 DGT fault, compressor A1 Circuit A shut down No Manual Hot gas thermostat contact open 102 Starter Guard fault compressor A1 Circuit A shut down No Ditto Crankcase heater fault and open motor current

201 DGT fault, compressor A2 Compressor A2 shut down Ditto Hot gas thermostat contact open 202 Starter Guard fault compressor A 2 Compressor A2 shut down Ditto Crankcase heater fault and open motor current

301 DGT fault, compressor A3 Compressor A3 shut down Ditto Hot gas thermostat contact open 302 Starter Guard fault compressor A 3 Compressor A3 shut down Ditto Crankcase heater fault and open motor current

401 DGT fault, compressor A4 Compressor A4 shut down Ditto Hot gas thermostat contact open 402 Starter Guard fault compressor A 4 Compressor A4 shut down Ditto Crankcase heater fault and open motor current

501 DGT fault, compressor B1 Circuit B shut down No Ditto Hot gas thermostat contact open 502 Starter Guard fault compressor B1 Circuit B shut down No Ditto Crankcase heater fault and open motor current

601 DGT fault, compressor B2 Compressor B2 shut down Ditto Hot gas thermostat contact open 602 Starter Guard fault compressor B 2 Compressor B2 shut down Ditto Crankcase heater fault and open motor current

701 DGT fault, compressor B3 Compressor B3 shut down Ditto Hot gas thermostat contact open 702 Starter Guard fault compressor B3 Compressor B3 shut down Ditto Crankcase heater fault and open motor current

801 DGT fault, compressor B4 Compressor B4 shut down Ditto Hot gas thermostat contact open 802 Starter Guard fault compressor B4 Compressor B4 shut down Ditto Crankcase heater fault and open motor current

fault detection board contact

Page 36

Order No. 13040-76, 05.2000. Supersedes order No.: New Manufactured by: Carrier S.A., Montluel, France. Manufacturer reserves the right to change any product specifications without notice. Printed in the Netherlands on totally chlorine-free paper.

Carrier PRO-DIALOG 30GK User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual