Carrier Fan 30GK User Manual

30GK Series

PRO-DIALOG

Control

Air-Cooled Liquid Chillers

50 Hz

Installation, operation and maintenance instructions

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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

IMPORTANT:

Risk of electrocution: Even when the main power isolator or

circuit breaker is off, it is still possible for certain compo-

nents such as crankcase heaters and trace heaters to be

energised, since they are connected to a separate power source.

Installation, start-up and servicing of equipment can be hazard-

ous 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).

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.

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.

During all servicing operations, it is important to read, under-

stand 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, compo-

nents and any parts supplied separately, and to comply with all

other relevant safety regulations.

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.

•

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.

IMPORTANT : If the boards need to be handled wear anti-

static gloves to avoid exposing the electronic components to a

destructive voltage. Only unpack the boards from their anti-

static bag when they need to be installed.

1.2 - Avoiding electrocution

Only personnel qualified in accordance with the recommendat-

ions of the IEC (International Electrotechnical Commission)

may be permitted access to electrical components. It is parti-

cularly 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.

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2 - GENERAL DESCRIPTION

2.1 - General

2.2 - Abbreviations used

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.

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

The following abbreviations are frequently used:

- Analogue Input

- Analogue Output

CCn - Operating type: CCN

* At present only air-cooled models are available.

CCN - Carrier Comfort Network.

This is the Carrier communication network

- Discrete Input

- Discrete Output

PRO-DIALOG Plus controls compressor start-up and demand

limits needed to maintain the desired entering or leaving tem-

perature setpoint for water. It automatically sets the position of

the electronic expansion valve (if used) to optimise the evapo-

rator 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.

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

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.

SIO

- Standard Input/Output - internal communication bus

linking the basic board to the slave boards

SST - Saturated Suction Temperature

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.

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 capa-

bilities but does not offer any of the features of the CCN network.

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3 - HARDWARE DESCRIPTION

3.1 - General

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.

Control board

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.

Legend

CCN connector

Red LED, status of the board

Green LED, communication bus SIO

Orange LED, communication bus CCN

NOTE: After a power cut the unit restarts in the same

operating mode as before the power cut.

Remote master board customer control connection contacts

Remote master board customer control connection signal

Remote master board customer report connection contacts

Master PD4 basic board

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.

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).

•

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).

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.

•

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

the inputs and outputs of the heat reclaim option.

Control box

Legend

Compressor start-up module

Control system

User interface

Power supply disconnect switch

Fan start-up module

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3.2.7 - Light emitting diodes on boards

3.2.3 - The user interface

All boards continuously check and indicate the proper

operation of their electronic circuits. A light emitting diode

(LED) lights on each board when it is operating properly.

The 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.

Red LED

•

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.

•

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.

3.2.4 - Connections between boards

Green LED

(item SIO on the board)

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.

•

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.

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

Orange LED - CCN/clock board

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'.

•

This LED flashes to show that the basic board is commu-

nicating via the CCN bus.

3.3 - The controls

NOTE: Any incorrect address will prevent the unit from

starting. Turn off the power before amending the address of

any auxiliary board.

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).

Board addresses

Board

Address switch

PD4-EXV

4xDO Fan board # 1

4xDO Fan board # 2

To adjust the refrigerant 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.

4xAI-2xAO board # 1

4xAI-2xAO board # 2

RCPM # 1 (compressor A1)

RCPM # 2 (compressor A2)

RCPM # 2 (compressor A3)

RCPM # 2 (compressor A4)

RCPM # 3 (compressor B1)

RCPM # 4 (compressor B2)

RCPM # 4 (compressor B3)

RCPM # 4 (compressor B4)

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:

3.2.6 - Power supply to the boards

All boards are supplied by a 24 V source, referred to earth. In the

event of a power supply interrupt, the unit restarts automatically

without the need for an external command. However, any faults

active when the supply is interrupted are saved and may in

certain cases prevent a circuit or unit from restarting.

•

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.

NOTE: When connecting the power supply for the boards,

maintain polarity.

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3.3.3 - The evaporator pumps

3.3.6 - Thermistors

The controller can regulate one or two evaporator pumps, with

automatic changeover between the two pumps.

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.

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.

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.

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)

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.

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.

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.

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.

Heat reclaim condenser entering/leaving water temperatures

These sensors measure the entering and leaving water tempera-

tures 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.

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.

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

Suction pressure sensors

They are located in the low-pressure side of the unit on the lead supplied by Carrier, and must be configured by the User Menu.

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.

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

CONNECTOR/CHANNEL TERMINAL DESCRIPTION

REMARKS

Alarm relay output, circuit A

Alarm relay output, circuit B

J3 / CH24

J3 / CH25

30A - 31A

30B - 31B

Indicates alarms in circuit A

Indicates alarms in circuit B

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 WAGO

231-306/026000 pitch 5.08.

User safety loop and chilled water

pump interlock

J4 / CH15a

34 - 35

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.

24 V a.c., 20 mA

Connector: 10 pin WAGO

734-110, pitch 3.5

Remote start/stop

J4 / CH11

J4 / CH12

32 - 33

65 - 66

The remote start/stop command is only used if the unit is

under remote operation control (rEM). See section 4.2.1.

Remote cooling setpoint selection

The remote cooling setpoint selection command is only

used if the unit is under remote operation control (rEM).

See section 4.2.1.

Remote heating/cooling control

J4 / CH13

63 - 64

The remote heating/cooling control command is only used

if the unit is under remote operation control (rEM). See

section 4.2.1.

remote heat reclaim control

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.

Demand limit command

J4 / CH14

J8 / CH10

73 - 74

71 - 72

This contact permits activating the unit demand limit

function. See section 5.8. This contact is active, whatever

the operating type.

0-10 V d.c. setpoint reset or

demand limit entry

This 0-10 V d.c. input is used for setpoint reset or unit

Connector: 2 pin WAGO 231-

demand limit. It is active, whatever the unit operating type. 302/026000 pitch 5.08

This 0-10 V signal can be supplied by a user command or

a 0-10 V temperature sensor.

Connection to CCN

J12

1 - 2 - 3

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 -

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

Connector/

Terminal

Description

Remarks

channel

Condenser water flow

switch input

J5/CH17

This contact is used to detect lack of condenser water flow and 24 V a.c - 20mA

shuts down the unit.

Evaporator 1 and 2 pump J5/CH18

operation input

This contact is used to detect an evaporator pump operation

fault and switches over to the other evaporator pump*.

Evaporator 1 control

Evaporator 2 control

J2/CH19

J2/CH20

This contact permits control of evaporator 1 pump by the unit*. 24 V a.c. internal supply.

This contact permits control of evaporator 2 pump by the unit*. Max. consumption

Condenser pump control J2/CH21

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

- each output: 20 VA/10W

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

Legend

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

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4 - SETTING UP PRO-DIALOG PLUS CONTROL

4.1 - Local interface general features

MAIN INTERFACE

SUMMARY INTERFACE

MAIN INTERFACE

SUMMARY INTERFACE

DUAL-CIRCUIT AIR-COOLED

CHILLER INTERFACE

DUAL-CIRCUIT WATER-COOLED

CHILLER INTERFACE

MENU BLOCK

The local interface enables a number of operating parameters to Main interface

be displayed and modified.

It gives access to all PRO-DIALOG PLUS data and operating

functions. It consists of:

The interface consists of two distinct parts: the main interface

(left hand section) and the summary interface (right hand

section).

•

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

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

increase of the value of any parameter.

Down arrow

Enter

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

decrease of the value of any parameter.

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

INFORMATIONS menu

Displays the general operating parameters for the unit.

TEMPERATURES menu

PRESSURES menu

Displays the unit operating temperatures.

Displays the unit operating pressures.

kPa

SETPOINTS menu

INPUTS menu

Displays the unit setpoints and enables them to be modified.

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.

CONFIGURATIONS menu

ALARMS menu

Displays the unit configuration and enables it to be modified.

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.

The following operating types can be selected using the

Start/Stop button:

OPERATINGTYPES

SUMMARY INTERFACE LEDS

4-DIGIT DISPLAY DESCRIPTION

LED

INDICATION WHEN LIT

LOFF

L-On

Local Off. The unit is halted in local mode.

Green LED:

Local On. The unit is in local control mode and is authorised

to start.

The unit is authorised to start or is already running

Red LED:

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.

- 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

CCN*

rEM*

CCN. The unit is controlled by CCN commands.

Remote. The unit is controlled by remote control contacts.

Red LED:

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.

Water flow switch default or user safety lock open.

Green LED:

The evaporator pump is running.

Legend

Yellow LEDs:

Displayed if the configuration requires it.

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).

Section 5.1 gives a more detailed description of the commands to start/stop

the unit, analysed by operating type.

Green LED:

The unit operates in heating mode.

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.

Green LED:

The unit operates in cooling mode.

TO STOP THE UNIT

SUMMARY INTERFACE PUSH BUTTONS

BUTTON DISPLAY

BUTTON ACTION

Press the Start/Stop

2-DIGIT DISPLAY 4-DIGIT DISPLAY

LOFF

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

Gray button: outdoor air temperature in °C

button for less than

4 seconds (one short

press is enough).

Control point (setpoint + reset) in °C

If the button is

kPa

Press 1: circuit A/B discharge pressure in kPa

Press 2: circuit A/B saturated condensing temperature in °C

released, the unit stops

without the need for

further action.

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

4.2.3 - 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.

4.2 - Unit start/stop control

CHANGINGTHE OPERATINGTYPE

4.2.1 - Description

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

methods:

BUTTON ACTION

2-DIGIT

4-DIGIT

DISPLAY

Continually press the operating type selection

button for more than 4 seconds.

LOFF

•

Locally on the actual unit (Local control type)

By remote control with the aid of user contacts (remote

control type)

Hold down the Start/Stop button.

The available operating types are displayed

one by one until the button is released.

L-On

L-Sc

•

By CCN control with the aid of the CCN (CCN control

type)

rEM

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.

Release the Start/Stop button if the operating

type you want is displayed (in this example L-

On). "C" flashes in the 2-digit display to show

that the controller is awaiting confirmation.

L-On

Press the Enter button to confirm the

The available operating types are described in the following

table.

operating type selected (in this example: L-

On). "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.

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4.3 - Menus

NOTE: The access to a sub-menu may require entering a

password. This is automatically requested. See section 4.5.7.2.

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.

The example below shows how to modify the value of item 1

in the Setpoint menu.

MODIFYINGTHEVALUE OF A PARAMETER

OPERATION

PRESS MENU LED ITEM

button NUMBER NUMBER

2-DIGIT 4-DIGIT

ITEM

DISPLAY DISPLAY

Hold on the MENU button until

the LED for SETPOINT lights.

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.

Press one of the Arrow buttons

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

(6.0°C in this example).

6.0

5.9

Press the Enter button for more

than 2 seconds to enable the

value associated with item 1 to be

modified. The Setpoint menu LED

flashes indicating that modification

mode is active.

The following example shows how to access item 3 in the

Pressures menu.

Keep pressing the Down Arrow

button until the value 5.7 is

displayed in the four-digit display.

The Setpoint menu LED keeps

flashing.

SELECTING A MENU ITEM

OPERATION

PRESS

BUTTON

MENU LED

ITEM NUMBER

2-DIGIT

5.8

5.7

DISPLAY

Press the MENU button until the

LED marked PRESSURE lights.

kPa

Press the Enter button again to

validate the change. The new

setpoint is 5.7°C. The Setpoint

menu LED stops flashing, indicat-

ing that modification mode no

longer applies.

5.7

Press one of the Arrow buttons

until the two-digit display shows 3

(item number 3).

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.

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

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 sub-

menu. 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.

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4.4 - General menu structure

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4.5 - Menu tree structure

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4.5.1 - Description of the Information menu

INFORMATION MENU [3]

ITEM

FORMAT

UNITS

DESCRIPTION

Automatic display mode. It cycles through the following displays:

Controlled water temperature: temperature of the water that the unit tries to maintain at the control point.

Unit operating type

±nn.n

°C

Local Off

Local On

Local On - based on unit clock.

CCN Control.

Remote Control

Master unit

LOFF

L-On

L-Sc

CCn

rEM

MASt

Unit status

Off: Unit is stopped and not authorised to start.

Ready: Unit is authorised to start

OFF

rEADY

dELAY

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.

Unit occupied/unoccupied status

Occupied: Unit in occupied mode

StOPPing

running

triPout

OvErridE

OCCUPIEd

UNOCCUPIEd -

Unoccupied: Unit in unoccupied mode

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

Alarm mode

Alarm: Unit is totally stopped because of failure.

Alert: Unit is in failure but not completely stopped.

Master/Slave status

COOL

HEAT

rECLAIM

ALArM

ALErt

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

MAStEr

SLAvE

1 [1]

2 [2]

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.

occu

unoc

Forc

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.

nn.n

minutes 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

4 [2]

in LOFF, L-On or L-Sc operating type. Displayed for heat pumps.

Heating mode selection

Cooling mode selection

HEAt

COOL

5 [2]

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.

YES

Normal cooling mode selection, use of standard condensing setpoint

Nnn

nnn

Total active capacity of unit.

Total active capacity of circuit A.

Total active capacity of circuit B.

8 [2]

9 [2]

nnn

Present demand limit. This is the authorised operating capacity of the unit. See section 5.8.

Forc

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

nnn

Present lag chiller demand limit. Displayed when the master/slave control is selected.

11 [2]

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

SP-2

AUtO

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.

12 [2]

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.

occu

unoc

Forc

±nn.n

°C

Active setpoint. This is the current cooling/heating setpoint: it refers to cooling/heating setpoint 1 or 2.

±nn.n

Forc

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.

±nn.n

°C

Controlled water temperature. Water 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.

±nn.n

Forc

°C

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

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

Legend

This item is masked when nil.

This item is displayed in certain unit configurations only.

Access to this menu is read-only except for item 10 that can be forced when the unit is in Local operating type.

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DESCRIPTION OF OPERATING MODES (ITEM 1 OF THE INFORMATION MENU)

MODE # MODE NAME

DESCRIPTION

Delay at start-up active

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.

2nd cooling setpoint active

Setpoint reset active

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.

Demand limit active

Ramp loading active

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).

Low entering water temperature

protection in heating mode

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.

13,14

Low suction temperature protection

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.

15,16

17,18

Low discharge superheat protection

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.

High pressure protection

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.

19,20

Not used

Heat reclaim active

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

activated).

Evaporator heater active

Mode active if risk of frost exists.

Evaporator pump reversal active

Periodic evaporator pump start-up

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.

Low night-time capacity

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 under SM control

Master/slave link active

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

4.5.3 - Description of the Pressures menu

TEMPERATURES MENU [2]

PRESSURES MENU [2]

ITEM FORMAT UNITS COMMENTS

ITEM

FORMAT

nnnn

UNITS

kPa

COMMENTS

±nn.n

°C

Evaporator entering water temperature

Evaporator leaving water temperature

Condenser entering water temperature

Condenser leaving water temperature

Reclaim condenser entering water temperature

Reclaim condenser leaving water temperature

Saturated discharge temperature circuit A

Saturated suction temperature circuit A

Suction temperature compressor A1

Superheat circuit A

Discharge pressure circuit A

Suction pressure circuit A

2[1]

3[1]

4[1]

5[1]

Differential oil pressure compressor A1

Discharge pressure circuit B

Suction pressure circuit B

Differential oil pressure compressor B1

Differential oil pressure compressor A2

Differential oil pressure compressor A3

Differential oil pressure compressor A4

Differential oil pressure compressor B2

Differential oil pressure compressor B3

Differential oil pressure compressor B4

Pumpdown pressure, heat reclaim, circuit A

Pumpdown pressure, heat reclaim, circuit B

6[1]

7[1]

8[1]

9[1]

10[1]

11[1]

12[1]

13[1]

Legend

10[1] ±nn.n

11[1] ±nn.n

12[1] ±nn.n

13[1] ±nn.n

14[1] ±nn.n

15[1] ±nn.n

Legend

Saturated discharge temperature circuit B

Saturated suction temperature circuit B

Suction temperature compressor B1

Superheat circuit B

Outdoor temperature

Water loop temperature, master/slave assembly

This item is displayed in certain unit configurations only.

Access to this menu is read-only

This item is displayed in certain unit configurations only

Access to this menu is read-only.

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4.5.4 - Description of the Setpoints menu

SETPOINTS MENU [2]

ITEM

FORMAT UNITS

RANGE

COMMENTS

±nn.n

nnn

°C

See table below

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.

3 [1]

nnn

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.

4 [1]

nnn

°C

See table below

0 to 100

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

setpoint control.

nnn

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.

6 [1]

±nn.n

°C/min

0.1 to 1.1

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.

7 [1]

±nn.n

°C/min

0.1 to 1.1

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.

8 [1]

±nn.n

[3]

°C

[3]

°C

See table below

-16 to 16

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**

9 [1]

10 [1]

11 [1]

12 [1]

13 [1]

Legend

This item is displayed in certain unit configurations only.

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.

SETPOINT DESCRIPTION

CONTROL FOR

LEAVING WATER

ENTERING WATER

Cooling

Minimum setpoint

- Water

3.3°C

-10°C

-20°C

9.3°C

-4°C

-14°C

- Medium Brine

- Low Brine

Maximum setpoint

Heating

Note:

Maximum setpoint

MCT - 4.0

MCT - 10.0

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.

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4.5.5 - Description of the Inputs menu

INPUTS MENU [2]

ITEM

FORMAT

UNITS

COMMENTS

OPEn/CLoS

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.

OPEn/CLoS

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

2[1]

3[3]

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.

OPEn/CLoS

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.

OPEn/CLoS

Water flow and customer interlock control 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.

6[1]

Water pump operation status. If the contact opens when the evaporator pump has received a command to operate, this trips a

pump failure alarm.

7[1]

8[1]

OPEn/CLoS

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.

9[1]

nn.n

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.

Legend

This item is displayed in certain unit configurations only

Access to this menu is read-only

Active in all operating types

See section 3.4

4.5.6 - Description of the Outputs/Tests menu

4.5.6.1 - General

This menu displays the status of the controller outputs. More-

over, 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

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.

1 [1]

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.

2 [1]

3 [1]

tEST

tESt

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.

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

ITEM

FORMAT

UNITS

DESCRIPTION

4 [1]

tESt

Fan contactor status/test, circuit B

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.

tESt

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.

tESt

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.

8 [1]

9 [1]

tESt

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.

Stop

tESt

FAIL

Good

Forc

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.

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.

OFF

tESt

FAIL

Good

Forc

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

Condenser pump status/test

On: the pump operates

Stop: the pump has stopped

OFF

tESt

FAIL

Good

Forc

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

13[1]

Evaporator heater and heat reclaim condenser status

b1 = evaporator heater

b2 = heat reclaim condenser heater

14[1]

15[1]

tESt

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.

YES

Used only for local interface

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

tESt

Legend

This item is displayed in certain unit configurations only

A test is only possible if the units are in local off mode and if all compressors have stopped

The password is only valid for the test. 'Test' is displayed during the test, alternating with the item number

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4.5.6.3 - Manual tests

The menus User 1 [USEr 1] and User 2 [USEr 2] are pass-

word-protected. The other menus are directly accessible, except

if item 12 of the User 1 menu (password for all configurations)

has been validated.

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 password is automatically requested, if it

has not previously been verified. The 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 4-

digit display alternately with the value tested. The Outputs/Test

LED stops flashing. Press the Enter key or an arrow key to stop

the test.

4.5.7.2 - 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 modifi-

cation 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.

4.5.7 - Description of the Configuration menu

4.5.7.1- General

This menu can be used to display and modify all configura-

tions: 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 docu-

ment. A configuration can only be modified if the unit is fully

stopped (LOFF).

This value can be modified through the Service configuration.

The password can be entered if the unit is fully stopped, other-

wise '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

ITEM USER 1

USER 2

[USER2]*

DATE

[dAtE]*

SCHEDULE 1

[ScHEduLE 1MEnu]*

SCHEDULE 2

[ScHEduLE 2 MEnu]* [HOLidAy MEnu]*

HOLIDAYS

BROADCAST

[BrodCASt]*

[USER1]

Return to previous menu

Return to previous

menu*

Return to previous Return to previous menu Return to previous

Return to previous menu

Circuit selection

Periodic pump start-

up*

Hour*

SUB-MENU:

Period 1 [PErIod 1]

SUB-MENU:

Period 1 [PErIod 1]

SUB-MENU:

Holidays 1 [HOLidAy 1]

Broadcast acknowledger

selection

Circuit capacity increase

sequence

Night mode - start

hour*

Day of the week* SUB-MENU:

Period 2 [PErIod 2]

SUB-MENU:

Period 2 [PErIod 2]

SUB-MENU:

Holidays 2 [HOLidAy 2]

Broadcast activation

Ramp selection*

Night mode - end

hour*

Day and month*

SUB-MENU:

Period 3 [PErIod 3]

SUB-MENU:

Period 3 [PErIod 3]

SUB-MENU:

Holidays 3 [HOLidAy 3]

Outdoor temperature

broadcast bus

Start-up delay*

Night mode - demand Year*

limit in %

SUB-MENU:

Period 4 [PErIod 4]

SUB-MENU:

Period 4 [PErIod 4]

SUB-MENU:

Holidays 4 [HOLidAy 4]

Outdoor temperature

broadcast element

Water pump selection

Number clock 1*

SUB-MENU:

Period 5 [PErIod 5]

SUB-MENU:

Period 5 [PErIod 5]

SUB-MENU:

Holidays 5 [HOLidAy 5]

Start month daylight

saving time

Water pump changover

delay*

Number clock 2*

SUB-MENU:

Period 6 [PErIod 6]

SUB-MENU:

Period 6 [PErIod 6]

SUB-MENU:

Holidays 6 [HOLidAy 6]

Start day daylight saving

time

Automatic reset

selection*

CCN address *

SUB-MENU:

Period 7 [PErIod 7]

SUB-MENU:

Period 7 [PErIod 7]

SUB-MENU:

Holidays 7 [HOLidAy 7]

Start hour daylight saving

time

Demand limit selection

CCN bus*

SUB-MENU:

Period 8 [PErIod 8]

SUB-MENU:

Period 8 [PErIod 8]

SUB-MENU:

Holidays 8 [HOLidAy 8]

Minutes to add

Voltage corresponding to

100% of demand limit

SUB-MENU:

Holidays 9 [HOLidAy 9]

End month daylight saving

time

Voltage corresponding to

0% of demand limit

SUB-MENU:

Holidays 10 [HOLidAy 10]

End day daylight saving

time

Extended display

selection

SUB-MENU:

Holidays 11 [HOLidAy 11]

End hour daylight saving

time

Password for all user

configurations

SUB-MENU:

Holidays 12 [HOLidAy 12]

Minutes to subtract

Software version number

SUB-MENU:

Holidays 13 [HOLidAy 13]

SUB-MENU:

Holidays 14 [HOLidAy 14]

SUB-MENU:

Holidays 15 [HOLidAy 15]

SUB-MENU:

Holidays 16 [HOLidAy 16]

Legend:

*: only displayed if configuration requires.

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CONFIGURATION

USER

[USEr]

USER1

[USEr 1]

USER2

[USEr 2]

SCHEDULE 1

[SCHEduLE 1]*

SCHEDULE 2

[SCHEduLE 2]*

HOLIDAYS

[HOLIDAYS]*

HOUR + DATE

[dAtE]*

BROADCAST

[broAdCASE]*

HOLIDAY 1

PERIOD 1

PERIOD 2

PERIOD 3

PERIOD 4

PERIOD 5

PERIOD 6

PERIOD 7

PERIOD 8

PERIOD 1

PERIOD 2

PERIOD 3

PERIOD 4

PERIOD 5

PERIOD 6

PERIOD 7

PERIOD 8

HOLIDAY 2

HOLIDAY 3

HOLIDAY 4

HOLIDAY 5

HOLIDAY 6

HOLIDAY 7

HOLIDAY 8

...

HOLIDAY 15

HOLIDAY 16

SUB-MENU PERIOD CONFIGURATION*

SUB-MENU HOLIDAY CONFIGURATION*

Item

PERIOD 1 to 8

[PEriod X MEnu]*

Item

HOLIDAYS 1 to 16

[HoLidAy X MEnu]*

Return to previous menu

Start of occupied period

End of occupied period

Selection Monday

Return to previous menu

Start month holidays

Start day holidays

Number of days, holidays

Selection Tuesday

Selection Wednesday

Selection Thursday

Selection Friday

Legend

*: only displayed if configuration requires.

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

user interface.

Selection Saturday

Selection Sunday

Selection holidays

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4.5.7.3 - Description of the User 1 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU [2]

ITEM

FORMAT

USEr MEnu

0/1/2

UNITS

DEFAULT

COMMENTS

When selected this item authorises return to the previous menu.

1 [1]

Lead circuit selection

0 = automatic based on the number of start-ups and the operating hours of each circuit

1 = lead circuit A

2 = lead circuit B

2 [1]

3 [1]

0/1

Circuit capacity increase sequence

0 = equal charge for both circuits

1 = priority charge on one circuit

YES/no

Ramp loading select. For units with more than one compressor per 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.

1 to 15

min

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

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.

0/1/2/3/4

Pump sequence select

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.

6 [1]

24 to 3000

0/1/2/3

hours

Pump changeover delay. Displayed if auto pump sequence is selected. This parameter is used for pump

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.

Automatic heating/cooling changeover selection. Permits activation of automatic reset type

0 = none

1 = 0-10 V d.c. reference voltage

2 = temperature difference

3 = outdoor temperature

0/1/2

Demand limit selection

0 = demand limit not selected

1 = demand limit by contact

2 = demand limit by external signal 0-10 V d.c.

9 [1]

10 [1]

0 to 10

Volts

Voltage corresponding to 100% of the demand limit

Voltage corresponding to 0% of the demand limit

0 to 10

«YES/no»

yes

Extended menu select

Yes = menu description available

No = menu description not available

This item authorises activating or inhibiting the menu item expanded display.

«YES/no»

Password for all User Configurations

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.

nn.n

Software version number

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

Legend

This item shall be masked when not used.

Access to menu is read/write.

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4.5.7.4 - Description of the User 2 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU

ITEM

FORMAT

USEr 2 Menu

YES/no

UNITS

DEFAULT

COMMENTS

When selected this item authorises return to the previous menu.

1[1]

Periodic pump quick-start of the water pump(s)

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.

2 [1]

n₁n₂n₃n₄

Night control mode - start time*

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

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

maximum night values.

3 [1]

4 [1]

5 [1]

n₁n₂n₃n₄

00:00 to 23:59

Night control mode - end time*

Authorises entering the time of day at which the night control mode ends.

00:00

0 to 100

Night mode demand limit value.

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

0 or 65 to 99

Schedule 1 clock number (for unit on/off schedule, see section 4.5.7.6).

0 = schedule in local operating mode

65 to 99 = schedule in CCN operating mode

6 [1]

0 or 65 to 99

Schedule 2 clock number (schedule for setpoint selection, see section 4.5.7.6).

0 = schedule in local operating mode

65 to 99 = schedule in CCN operating mode

7 [1]

1 to 239

0 to 239

CCN element address.

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

8 [1]

CCN bus number.

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

Legend

n₁n₂: 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.

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.

4.5.7.5 - Description of Date and Time configuration sub-

4.5.7.6 - Description of the Time Schedules sub-menus

The control provides two timer programs: time schedule 1 and

time schedule 2.

DATE & TIME CONFIGURATION SUB-MENU

ITEM

FORMAT

COMMENTS

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.

dAtE MEnu

When selected this item authorises return to the

previous menu.

n₁n₂n₃n₄

Current time setting.

00:00 to 23:59 n₁n₂: 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.

n₃n₄: minutes (00 to 59). Continuous pressing of the

Enter key again causes the last two characters to flash

and minutes can be adjusted.

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.

Current day of week setting.

«Mo»

«tU»

«uE»

«tH»

«Fr»

Monday

Tuesday

Wednesday

Thursday

Friday

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.

«SA»

«Su»

Saturday

Sunday

n₁n₂n₃n₄

Current day and month setting.

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

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.

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 takes priority over the unoccupied period.

nnnn

Current year setting.

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.

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PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 8)

4.5.7.7 - Description of the Holidays sub-menus

ITEM # FORMAT

COMMENTS

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).

Period X Menu

Indicates the period (X) you are going to

configure. When selected this item authorises a

return to the main menu.

n₁n₂n₃n₄

00:00 to 24:00

Occupied period - Start time*.

Authorises entering the time of day at which the

occupied period starts.

n₁n₂n₃n₄

00:00 to 24:00

Occupied period - End time*.

Authorises entering the time of day at which the

occupied period ends.

Each of these public holiday periods can be displayed and

changed with the aid of a sub-menu.

Mo- 0 or Mo- 1

tu- 0 or tu- 1

1 = the period is in effect on Monday.

0 = period not in effect on Monday

1 = the period is in effect on Tuesday.

0 = period not in effect on Tuesday.

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.

UE-0 or UE- 1

1 = the period is in effect on Wednesday.

0 = period not in effect on Wednesday.

tH- 0 or tH- 1

Fr-0 or Fr- 1

1 = the period is in effect on Thursday.

0 = period not in effect on Thursday.

HOLIDAY PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 16)

1 = the period is in effect on Friday.

ITEM # FORMAT

COMMENTS

0 = period not in effect on Friday.

HoLidAy X Sub-menu

When selected this item authorises a return

to the configuration menu.

SA- 0 or SA- 1

Su- 0 or Su- 1

Ho- 0 or Ho- 1

1 = the period is in effect on Saturday.

0 = period not in effect on Saturday.

0 to 12

Start month of public holiday period

0 = period not in use

1 = January, 2 = February, etc.

1 = the period is in effect on Sunday.

0 = period not in effect on Sunday.

1 = the period is in effect on public holidays.

0 = period not in effect on public holidays.

0 to 31

Start day of public holiday period. 0 period

not in use.

Legend

0 to 99 days

Duration of the public holiday period in

days.

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.

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

Typical timer program:

A public holiday period lasting 2 day on 25th May, for

instance, is configured as follows: start month = 5, start

day = 25, duration = 2

Time MON TUE WES THU FRI SAT SUN HOL

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.

P2 P2 P3

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.

MON : Monday

TUE : Tuesday

WED : Wednesday

THU : Thursday

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.

FRI :

Friday

SAT :

Saturday

SUN : Sunday

HOL : Public holidays

Occupied

Unoccupied

Starts at

0h00,

7h00,

20h00,

Not used in this example

Ends at

3h00,

Active on

Monday

Monday and Tuesday

Wednesday

Thursday and Friday

Saturday

P1: period 1,

P2: period 2,

P3: period 3,

P4: period 4,

P5: period 5,

P6: period 6,

P7: period 7,

P8: period 8,

18h00,

21h00,

17h00,

12h00,

21h00,

Public holidays

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BROADCAST CONFIGURATION SUB-MENU

ITEM #

FORMAT

COMMENTS

broAdCASt MEnu

YES/no

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

Determines whether or not the unit is a broadcast acknowledger when the unit is connected on a CCN network. There must be

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.

YES/no

This item authorises enabling or disabling the Broadcast function. When it is set to Yes, the control will make a periodic

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.

nnn

0 to 239

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

Used for CCN network function only.

nnn

0 to 239

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

connected to it. Used for CCN network function only.

1 to 12

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

daylight saving time.

1 to 31

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

saving time.

n₁n₂n₃n₄

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

00:00 to 24:00

adjust its time for the start of daylight saving time.

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.

nnnn

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

1 to 1440 minutes

saving time.

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

1 to 12

daylight saving time.

1 to 31

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

saving time.

n₁n₂n₃n₄

00:00 to 24:00

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

will adjust its time for the end of daylight saving time.

nnnn

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

1 to 1440 minutes

daylight saving time.

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.

4.5.8 - Description of the Alarms menu

4.5.9 - Description of the Alarms History 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 HISTORY MENU

ITEM #

1 [1]

FORMAT

COMMENTS

Alarm history code 1*

Alarm history code 2*

Alarm history code 3*

Alarm history code 4*

Alarm history code 5*

Alarm history code 6*

Alarm history code 7*

Alarm history code 8*

Alarm history code 9*

Alarm history code 10*

2 [1]

3 [1]

ALARMS MENU

4 [1]

ITEM #

FORMAT

DESCRIPTION

5 [1]

0 [1]

X ALArM

X alarms are active

6 [1]

rESEt ALArM Reset of alarms is requested

7 [1]

To reset all active alarms, continuously press the Enter

key. ‘rESET ALArM’ is then displayed. Press the select

key again: all alarms are reset.

8 [1]

9 [1]

10 [1]

Legend

1 [1]

Current alarm code 1*

Current alarm code 2*

Current alarm code 3*

Current alarm code 4*

Current alarm code 5*

2 [1]

This item is masked when nil

Pressing the Enter key when alarm code is displayed causes the following

message to be scrolled:

3 [1]

4 [1]

“time of alarm” “date of alarm” “full CCN alarm message”

- “time of alarm”: hh-mm

- “date”: dd-mm

5 [1]

Legend

This item is masked when nil

Pressing the Enter key when alarm code is displayed causes the following

message to be scrolled:

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

“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

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4.5.10 - Runtime menu description

4.5.10.2 - Description of the Runtimes 2 menu

RUNTIMES MENU [2]

RUNTIMES

iTEM # FORMAT

UNIT

COMMENTS

When selected this item

authorises return to the previous

RUNTIMES 1

[runtiMES 1]

RUNTIMES 2

[runtiMES 2]

MAINTENANCE

[MAintEnAnCE]

nnnn | M 10 | M100

hrs/10 or 100

Pump #1 operating hours*

Pump #2 operating hours*

3 [1]

Condenser pump operating

hours

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

user interface.

4 [1]

nnnn

Number of start-ups for the

compressor with the highest

number during the last hour

Average number of compressor

start-ups/hour for the last 24

hours

4.5.10.1 - Description of the Runtimes 1 menu

RUNTIMES MENU [1]

iTEM # FORMAT

UNIT

COMMENTS

When selected this item

authorises return to the previous

4.5.10.3 - Maintenance menu description

To be active, the maintenance function must be preset in the

Service configuration.

nnnn | M 10 | M100

hrs/10 or 100

-/10 or 100

Unit operating hours*

Compressor A1 operating hours*

Compressor A2 operating hours*

Compressor A3 operating hours*

Compressor A4 operating hours*

Compressor B1 operating hours*

Compressor B2 operating hours*

Compressor B3 operating hours*

Compressor B4 operating hours*

Machine starts*

3 [1]

4 [1]

5 [1]

6 [1]

7 [1]

8 [1]

9 [1]

ITEM # FORMAT

DESCRIPTION

MAintEnAnCE MEnu When selected this item authorises return to the

previous menu.

1 [1]

2 [1]

3 [1]

4 [1]

5 [1]

Accessible with the Service password.

For future use

ALErt

Water loop rate to low

nnn/ALErt

Next primary pump maintenance operation in nnn

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

maintenance has elapsed.

-/10 or 100

Compressor A1 starts*

12 [1]

13 [1]

14 [1]

15 [1]

16 [1]

17 [1]

18 [1]

-/10 or 100

Compressor A2 starts*

6 [1]

nnn/ALErt

Next secondary pump maintenance operation in

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

before maintenance has elapsed.

-/10 or 100

Compressor A3 starts*

-/10 or 100

Compressor A4 starts*

-/10 or 100

Compressor B1 starts*

7 [1]

Next water filter maintenance operation in nnn

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

maintenance has elapsed.

-/10 or 100

Compressor B2 starts*

-/10 or 100

Compressor B3 starts*

Legend

-/10 or 100

Compressor B4 starts*

1 This item is masked when not used.

NOTES

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”.

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5 - PRO-DIALOG PLUS CONTROL OPERATION

5.1 - Start/stop control

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 arrange-

ment. The master control type determines whether the unit

is to be controlled locally, remotely or through CCN (this

parameter is a Service configuration).

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.

CCN emergency shutdown: if this CCN command is

activated, it shuts the unit down whatever the active

operating type.

CHIL_S_S: this network command relates to the chiller

start/stop when the unit is in CCN control (CCn). Vari-

able forced to disable: the unit is halted. Variable forced to

Enable: the unit runs in accordance with schedule 1.

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

ACTIVE OPERATING TYPE

STATUS OF PARAMETERS

CONTROL UNIT

TYPE

MODE

REMOTE

MASTER

START/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

Active

Local

Remote

CCN

Active

Unoccupied

Active

Off

Active

Unoccupied

Active

Disable

Active

Unoccupied

CCN

Active

Local

Remote

CCN

Local

Remote

CCN

Off

Unoccupied

Active Disable

Active

Unoccupied

CCN

Active

Disable

Dsable

Disable

Local

Remote

CCN

Active

Occupied

Active

Enable

Active

Local

Remote

CCN

Local

Remote

CCN

Active Enable

5.2 - Heating/cooling selection

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.

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

HEATING/COOLING

SELECTION IN LOCAL MODE

ON/OFF

STATUS

CONTROL TYPE

REMOTE HEATING/

COOLING CONTACTS

HC_SEL

OPERATING MODE

Off

Cooling

Heating

Cooling

Heating

Cooling

Heating

Local

Remote

CCN

Cooling

Heating

Cooling mode

Heating mode

Cooling

Heating

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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 confi-

gured (see User configuration) and when the unit is in one of the

on modes described above or in delay mode. Since the minimum

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 start-

up delay has passed. Furthermore, this contact must remain

closed when the unit is not in local off, remote or CCN control

value for the delay at start-up is 1 minute (configurable between 1 mode. Opening this contact for more than 8 seconds while the

and 15 minutes), the pump will run for at least one minute

before the first compressor starts.

unit is operating, will cause immediate shut-down of the faulty

unit.

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.

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

The pump can be started in particular operating conditions when pump can be started.

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

NOTE: The evaporator heater control parameters may be

modified using the Service Configuration menu.

5.7 - Control point

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.

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.

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).

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

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:

Only available on water-cooled units and air-cooled units with

heat reclaim.

The condenser pump can be controlled by two modes, depend-

ing 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.

In both cases the reset parameters, i.e. slope, source and maxi-

mum 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.

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5.8 - Demand limit

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.

Generally, demand limit is used by an energy management

system in order to restrict the unit electricity consumption.

The PRO-DIALOG Plus control system for 30GX & 30HX

provides two methods of demand limit:

5.10 - Determining the lead circuit

•

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.

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.

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.

•

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.

NOTE: A limitation value of 100% means that the unit may

call upon the full array of its capacity stages.

5.11 - Circuit loading sequence

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).

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.

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

No demand limit

•

Total demand limit

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.

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 tempera-

ture 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.

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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).

There are two configurable methods for controlling the conden-

ser water valves (optional):

• Controlling head pressure by reference to a setpoint:

Saturated head pressure is controlled by reference to a user-

definable fixed setpoint. This temperature is maintained by

using the valves to control the flow of water in each conden-

ser 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 re-

selected.

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.

5.16 - Active setpoint selection

Since the EXVs are driven by the controller their positions are

always known. During start-up of a circuit its EXV is fully closed

Two setpoints can be selected as active in cooling mode, and

to ensure pump down. After pump down, the system continuously one setpoint in heating mode. Usually, the second cooling

controls and monitors the valve position. Similarly, on shutdown

of a circuit the EXV is closed again to ensure pumping down.

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).

EXVs are also used to restrict suction temperature, making it

possible to start the unit at higher water and suction tempera-

tures without overloading the compressors. This procedure

controls what is known as Maximum Operating Pressure (MOP).

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:

5.14 - Head pressure control on air-cooled units

There are two methods, configurable only by Carrier Service,

for controlling the condenser fans:

•

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.

• 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.

•

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 configura-

tion and wiring.

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LOCAL OPERATING MODE

PARAMETER STATUS

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 trans-

mitted automatically to the slave unit. The master unit can be

controlled locally, remotely or by CCN commands. Therefore

to start up the assembly, simply validate the Master operating

type (MASt) on the master unit. If the Master has been confi-

gured 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 volt-

free contacts if the unit has been configured for remote control.

HEATING/

COOLING

OPERATING

MODE

LOCAL

SETPOINT

SELECTION

SCHEDULE 2

PROGRAM STATUS

ACTIVE SETPOINT

cooling

heating

holidays

sp 1

sp2

auto

cooling setpoint 1

cooling setpoint 2

heating setpoint

cooling setpoint 1

cooling setpoint 2

occupied

unoccupied

REMOTE OPERATING MODE

PARAMETER STATUS

HEATING/

COOLING

OPOERATING

MODE

CONTROL

CONTACT

SCHEDULE 2

PROGRAM STATUS

ACTIVE SETPOINT

heating

heating setpoint

cooling setpoint 1

cooling setpoint 2

cooling setpoint 1

cooling setpoint 2

cooling

sp 1

One of the functions of the master unit (depending on its con-

figuration) 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.

cooling

sp2

holidays

occupied

unoccupied

CCN OPERATING MODE

PARAMETER STATUS

HEATING/COOLING

OPERATING MODE

SCHEDULE 2

PROGRAM STATUS

ACTIVE SETPOINT

cooling

heating

occupied

unoccupied

cooling setpoint 1

cooling setpoint 2

heating setpoint

5.17 - High pressure load shedding function

The lead machine will always be started first. When the lead

machine is at its full available capacity, start-up delay (confi-

gurable) 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 set-

point. The lead machine will be held at its full available capa-

city 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.

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.

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.

5.18 - 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.

5.20 - Controlling Pro-Dialog Plus units with a System

Manager

5.19 - Master/slave assembly

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.

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.

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 opera-

ting. 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.

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5.21 - Optional heat reclaim module

6 - DIAGNOSTICS - TROUBLESHOOTING

6.1 - General

Change-over procedure from cooling mode to heat reclaim

mode:

•

Start-up of the condenser pump

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.

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.

•

6.2 - 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 com-

mand. However, any faults active when the supply is inter-

rupted 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

2-DIGIT DISPLAY 4-DIGIT DISPLAY BUTTON LED

Hold down the MENU

button until the LED

for alarms lights. The

4-digit display shows

the number of active

alarms (2 in this

2 ALArM

example).

Press the Enter button

until "rESEt ALARrM"

is shown in the 4-digit

display.

rESEt ALArM

Press the Enter button

again to validate the

reset. "Good" is dis-

played for 2 seconds

then, "2 ALArM" and

then, "no ALArM".

Good

then, 2 AL

then, no ALArM

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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

Evaporator leaving water thermistor fault

Thermistor outside range

Unit shut down

Yes

Auto

Thermistor or wiring fault or

bad connection

Evaporator entering water thermistor fault

Condenser leaving water thermistor fault

Ditto

Unit shut down

Yes

Auto

Ditto

Heating mode: Unit shut down,

if control on leaving water.

Cooling mode: no action

Condenser entering water thermistor fault

Heat reclaim entering water thermistor fault

Ditto

Heating mode: Unit shut down,

if control on entering water.

Cooling mode: no action

Auto

Ditto

Unit with heat recalaim option:

heat reclaim mode shut down,

unit changes over to standard

cooling mode. If not: no action

Heat reclaim leaving water thermistor fault

Outdoor temperature sensor fault

Ditto

None

Auto

Ditto

Reset: normal setpoint used.

Limitation or reset deactivated.

Auto, if temp. mea- Thermistor faulty

sured by sensor

returns to normal

CHWS (master/slave) fluid thermistor fault

Suction thermistor fault, compressor A1

Suction thermistor fault, compressor B1

External 0-10 V dc signal fault

Ditto

Deactivated

Ditto

Auto

Themistor faulty

Ditto

Circuit A shut down

Circuit B shut down

Yes

Ditto

Reset signal outside range

Reset: normal setpoint used

Signal incorrect, wiring error

Limitation or reset deactivated

Discharge pressure sensor fault, circuit A

Discharge pressure sensor fault, circuit B

Suction pressure sensor fault, circuit A

Suction pressure sensor fault, circuit B

Oil pressure sensor fault, compressor A1

Oil pressure sensor fault, compressor B1

Oil pressure sensor fault, compressor A2

Oil pressure sensor fault, compressor B2

Oil pressure sensor fault, compressor A3

Oil pressure sensor fault, compressor B3

Oil pressure sensor fault, compressor A4

Oil pressure sensor fault, compressor B4

Pumpdown pressure sensor fault, circuit A

Voltage transmitted by incorrect sensor Circuit A shut down

Yes

Auto

Sensor fault or wiring error

Ditto

Circuit B shut down

Ditto

Circuit A shut down

Circuit B shut down

Circuit A shut down

Circuit B shut down

Compressor A2 shut down

Compressor B2 shut down

Compressor A3 shut down

Compressor B3 shut down

Compressor A4 shut down

Compressor B4 shut down

If circuit is in heat reclaim

mode, it goes to cooling mode.

If not, no action

Auto, if press. mea-

sured by sensor

returns to normal

Pumpdown pressure sensor fault, circuit B

Ditto

Auto

Ditto

Loss of communication with compressor board A1

Communication with the compressor

board is lost

Circuit A shut down

Wiring fault, faulty module,

incorrect module address

Loss of communication with compressor board A2

Loss of communication with compressor board A3

Loss of communication with compressor board A4

Loss of communication with compressor board B1

Loss of communication with compressor board B2

Loss of communication with compressor board B3

Loss of communication with compressor board B4

Loss of communication with EXV board

Ditto

Compressor A2 shut down

Compressor A3 shut down

Compressor A4 shut down

Circuit B shut down

Auto

Ditto

Compressor B2 shut down

Compressor B3 shut down

Compressor B4 shut down

Unit shut down

Wiring bus faulty, incorrect

address or board faulty

Loss of communication with NRCP board

Loss of communication with fan board 1

The board does not respond

Ditto

Unit shut down, if heat reclaim mode No

is selected

Auto, if board is

again detected

NRCP board faulty

Unit shut down, if the number of

fan stages per circuit is less than 3.

If not, circuit A shut down

Auto

Wiring bus faulty, incorrect

address or board faulty

Loss of communication with fan board 2

Ditto

Circuit B shut down

Auto

Ditto

Loss of communication with 4xAI - 2xAO board 1

Unit shut down or no action

Ditto, depending on

configuration

Loss of communication with 4xAI - 2xAO board 2

Pumpdown fault, circuit A

Ditto

Compressors or circuit shut down

Circuit A shut down

Auto

Ditto, depending on

configuration

End of pumpdown conditions not

satisfied

Manual

EXV or sensor faulty

Pumpdown fault, circuit B

Evaporator frost protection

Ditto

Circuit B shut down

Unit shut down

Ditto

Unit operating: units shut down if

temp. < defrost threshold.

Auto first time,

then manual

Low water flow or

thermistor defective

Unit shut down: if temp < threshold

and evaporator heater on for more

than 10 mins.

Low evaporator water flow rate.

Low suction temperature, circuit A

Unit shut down

Manual

Water pump faulty

Circuit operating: saturated suction

temp. < defrost threshold and < leaving

water -16°C for more than 10 mins.

Circuit A shut down

Low charge, filter dirty

ot thermistor faulty

Low suction temperature, circuit B

High suction overheat, circuit A

High suction overheat, circuit B

Low suction overheat, circuit A

Ditto

Circuit B shut down

Circuit A shut down

Circuit B shut down

Circuit A shut down

Manual

Ditto

EXV fully open

Ditto

Yes

EXV in min. position, and circuit

superheat below superheat setpoint

-5.5 K, saturated suction temp. above

MOP for 5 mins.

EXV or thermistor or

transducer defective

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ALARM CODE DESCRIPTIONS

Code Alarm name

Description

Action

Pumpdown

Reset type

Manual

Probable cause

Low suction overheat, circuit B

Low oil pressure, compressor A1

Circuit B shut down

Circuit A shut down

Yes

Ditto

Oil pressure < min. threshold

Manual

Compressor, crankcase

heater, pressure sensor or

EXV faulty, refrigerant

charge too high, low oil

charge

Low oil pressure, compressor B1

Low oil pressure, compressor A2

Low oil pressure, compressor B2

Low oil pressure, compressor A3

Low oil pressure, compressor B3

Low oil pressure, compressor A4

Low oil pressure, compressor B4

Evaporator water flow control fault

Ditto

Circuit B shut down

Manual

Ditto

Compressor A2 shut down

Compressor B2 shut down

Compressor A3 shut down

Compressor B3 shut down

Compressor A4 shut down

Compressor B4 shut down

Ditto

1. Interlock not closed before end

of start-up delay

2. Pump shut down for 2 mins

and water flow contact closed

Unit shut down.

Pump shut down

Evaporator water flow fault

Low pressure fault, circuit A

Circuit operating, and suction pressure Circuit A shut down

below permitted threshold for more

than 3 mins.

Auto first time,

then manual*

Low refrigerant charge, EXV

faulty or filter dirty

Low pressure fault, circuit B

Ditto

Circuit B shut down

None

Ditto

Auto

Ditto

Repeated high pressure load sheds, circuit A

More than 6 successive capacity load

sheds in the circuit due to exceeded

high pressure

Transducer faulty, condenser

ent. air temp., evaporator ent.

water temp. too high, cond.

blocked or fan flow rate too

low

Repeated high pressure load sheds, circuit B

Ditto

High pressure switch not reset or reverse compressor The high pressure switch has not been Circuit A shut down

rotation, circuit A

Manual

The high pressure switch has

not been reset, poor electrical

connection of lead compr.

reset after a high pressure cut-out,

or the lead compressor does not work

High pressure switch not reset or reverse compressor Ditto

rotation, circuit B

Circuit B shut down

Manual

Auto

Ditto

Control box thermostat fault

Sensor overheat

Unit shut down

Control box poorly

ventilated

Loss of communication with System Manager

Units controlled by SM, and

communication with the module over

2 mins. faulty

Unit operates in autonomous mode

CCN network fault

Loss of communication with the master or slave

Master/slave configuration error

Master/slave connection interrupted

beween the two units for more than

2 mins.

Unit operates in autonomous mode

Master/slave control not allowed

Auto

CCN network fault

Poor master/slave configuration

Auto/manual in

case of heating/

cooling fault

Master/slave configuration

fault

Initial factory configuration necessary

All factory parameters are at zero

Poor factory configuration

Unit prevented from starting

Ditto

Auto

Ditto

No factory configuration

Factory configuration error

Poor factory configuration.

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

CCN/Clock Board fault

The CCN/Clock Board is no longer

detected

Unit shut down

Auto, if the board CCN/Clock Board faulty

is again detected

Emergency stop

An emergncy stop commend has been Unit shut down

transmitted by the CCN network.

CCN

CCN network command

Pump No. 1 fault

Evaporator water pump operating

contact open, when the pump has

received a commmand to operate.

Unit shut down

Manual

Pump overheat or poor

pump connection

Pump No. 2 fault

Ditto

Unit shut down

Manual

Auto

Ditto

Condenser anti-freeze protection, circuit A

Saturated temperature is under the

frost cut-out point

Unit shut down. Condenser pump

started, if unit is shut down

Discharge pressure trans-

ducer faulty, refrigerant leak,

or low cond. water temp.

Condenser anti-freeze protection, circuit B

Lack of water flow, condenser

Ditto

Auto

Ditto

Water flow switch (water-cooled units) Unit shut down

not closed for 1 min.

Manual

Condenser pump, low water

flow, water flow switch

Condenser water flow fault, heat reclaim mode

Heat reclaim mode fault, circuit A

Ditto

Units stays in cooling mode

Manual

Ditto

More than two consecutive pumpdown Circuit A stays in cooling mode

sequences not successful

Leak or heat reclaim or drain

solenoid shut-off valve fault

Heat reclaim mode fault, circuit B

High pressure fault, circuit A

Ditto

Circuit B stays in coolng mode

Ditto

Circuit operating and discharge pressure Unit shut down

exceeds the high pressure cut-out point

Manual, the high Fan circuit fault, air or

pressure command condenser temperature too

must be reset

high

manually by the

button on the HP

pressure switch

High pressure fault, circuit B

Ditto

None

Ditto

Maintenance alert

A maintenance alert is active

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

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

The discharge gas thermostat detects and protects the

compressor against abnormally high discharge temperatures.

6.4.1 - Compressor faults

6.4.1.1 - General

Each compressor is protected against multiple faults by two

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

crankcase heaters which ensure correct lubrication when the

compressor starts.

6.4.1.2 - Compressor protection devices

On PRO-DIALOG Plus units, compressors are individually

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

Manual

Ditto

Probable cause

101

102

DGT fault, compressor A1

Circuit A shut down

Hot gas thermostat contact open

Starter Guard fault compressor A1

Crankcase heater fault and open motor current

fault detection board contact

201

202

DGT fault, compressor A2

Compressor A2 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor A 2

Crankcase heater fault and open motor current

fault detection board contact

301

302

DGT fault, compressor A3

Compressor A3 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor A 3

Crankcase heater fault and open motor current

fault detection board contact

401

402

DGT fault, compressor A4

Compressor A4 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor A 4

Crankcase heater fault and open motor current

fault detection board contact

501

502

DGT fault, compressor B1

Circuit B shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor B1

Crankcase heater fault and open motor current

fault detection board contact

601

602

DGT fault, compressor B2

Compressor B2 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor B 2

Crankcase heater fault and open motor current

fault detection board contact

701

702

DGT fault, compressor B3

Compressor B3 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor B3

Crankcase heater fault and open motor current

fault detection board contact

801

802

DGT fault, compressor B4

Compressor B4 shut down

Ditto

Hot gas thermostat contact open

Starter Guard fault compressor B4

Crankcase heater fault and open motor current

fault detection board contact

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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.

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