Carrier PRO-DIALOG Plus 30GK Series Product specifications

30GK Series
PRO-DIALOG
Control
Air-Cooled Liquid Chillers
50 Hz
Installation, operation and maintenance instructions
1
TABLE OF CONTENTS
1 - SAFETY CONSIDERATIONS .................................................................................................................................................. 4
1.1 - General ................................................................................................................................................................................. 4
1.2 - Avoiding electrocution ......................................................................................................................................................... 4
2 - GENERAL DESCRIPTION ...................................................................................................................................................... 5
2.1 - General ................................................................................................................................................................................. 5
2.2 - Abbreviations used ............................................................................................................................................................... 5
3 - HARDWARE DESCRIPTION .................................................................................................................................................. 6
3.1 - General ................................................................................................................................................................................. 6
3.2 - Electronic boards .................................................................................................................................................................. 6
3.2.1 - The basic board ............................................................................................................................................................ 6
3.2.2 - Slave boards ................................................................................................................................................................. 6
3.2.3 - The user interface ......................................................................................................................................................... 7
3.2.4 - Connections between boards ....................................................................................................................................... 7
3.2.5 - Slave board addresses .................................................................................................................................................. 7
3.2.6 - Power supply to the boards .......................................................................................................................................... 7
3.2.7 - Light emitting diodes on boards .................................................................................................................................. 7
3.3 - The controls .......................................................................................................................................................................... 7
3.3.1 - Electronic expansion valve (EXV) .............................................................................................................................. 7
3.3.2 - The head pressure controls .......................................................................................................................................... 7
3.3.3 - The evaporator pumps ................................................................................................................................................. 8
3.3.4 - The condenser pump .................................................................................................................................................... 8
3.3.5 - Pressure sensors ........................................................................................................................................................... 8
3.3.6 - Thermistors .................................................................................................................................................................. 8
3.4 - User connections .................................................................................................................................................................. 9
4 - SETTING UP PRO-DIALOG PLUS CONTROL ................................................................................................................. 10
4.1 - Local interface general features .......................................................................................................................................... 10
4.2 - Unit start/stop control ......................................................................................................................................................... 11
4.2.1 - Description ................................................................................................................................................................. 11
4.2.2 - Stopping the unit in local mode ................................................................................................................................. 11
4.2.3 - Starting unit and selecting an operating type ............................................................................................................. 11
4.3 - Menus ................................................................................................................................................................................. 12
4.3.1 - Selecting a menu ........................................................................................................................................................ 12
4.3.2 - Selecting a menu item ................................................................................................................................................ 12
4.3.3 - Modifying the value of a parameter/access to a sub-menu ........................................................................................ 12
4.3.4 - Expand display ........................................................................................................................................................... 12
4.4 - General menu structure ....................................................................................................................................................... 13
4.5 - Menu tree structure ............................................................................................................................................................. 14
4.5.1 - Description of the Information menu ......................................................................................................................... 15
4.5.2 - Description of the Temperatures menu ...................................................................................................................... 16
4.5.3 - Description of the Pressures menu ............................................................................................................................. 16
4.5.4 - Description of the Setpoints menu ............................................................................................................................. 17
4.5.5 - Description of the Inputs menu .................................................................................................................................. 18
4.5.6 - Description of the Outputs/Tests menu ..................................................................................................................... 18
4.5.7 - Description of the Configuration menu ..................................................................................................................... 20
4.5.8 - Description of the Alarms menu ................................................................................................................................ 25
4.5.9 - Description of the Alarms History menu ................................................................................................................... 25
4.5.10 - Runtime menu description ....................................................................................................................................... 26
The cover photograph is solely for illustration, and forms no part of any offer for sale or any sale contract. The
manufacturer reserves the right to change the design at any time without notice.
2
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
3
1 - SAFETY CONSIDERATIONS
1.1 - General
Installation, start-up and servicing of equipment can be hazardous if factors particular to the installation are not considered:
operating pressures, electrical components, voltages and the
installation site itself (elevated plinths, rooftops and built-up
structures).
Only highly trained and qualified installation engineers and
technicians, who are fully trained on the product, are authorised
to install and start up this equipment.
During all servicing operations, it is important to read, understand and follow all the recommendations and instructions
given in the installation and service instructions for the product,
including the tags and labels affixed to the equipment, components and any parts supplied separately, and to comply with all
other relevant safety regulations.
•
•
•
Apply all safety codes and practices.
Wear safety glasses and gloves.
Use the proper tools to move heavy objects. Move units
carefully and set them down gently.
1.2 - Avoiding electrocution
Only personnel qualified in accordance with the recommendations of the IEC (International Electrotechnical Commission)
may be permitted access to electrical components. It is particularly recommended that all sources of electricity to the unit
be shut off before any work is begun. Shut off the main power
supply at the main circuit breaker or isolator.
4
IMPORTANT:
Risk of electrocution: Even when the main power isolator or
circuit breaker is off, it is still possible for certain components such as crankcase heaters and trace heaters to be
energised, since they are connected to a separate power source.
Even when the unit is switched off, the power circuit remains
energised, as long as the unit or circuit disconnect is not open.
Refer to the wiring diagram for details.
Attach appropriate safety labels.
Risk of burns: Electrical currents cause components to get
hot either temporarily or permanently. Handle power cables,
electrical cables and conduits, terminal box covers and motor
frames with very great care.
IMPORTANT: This equipment uses and emits electromagnetic
signals. The tests carried out on this product have shown that
it complies with all applicable codes regarding electromagnetic
compatibility.
IMPORTANT : If the boards need to be handled wear antistatic gloves to avoid exposing the electronic components to a
destructive voltage. Only unpack the boards from their antistatic bag when they need to be installed.
2 - GENERAL DESCRIPTION
2.2 - Abbreviations used
2.1 - General
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
* At present only air-cooled models are available.
PRO-DIALOG Plus controls compressor start-up and demand
limits needed to maintain the desired entering or leaving temperature setpoint for water. It automatically sets the position of
the electronic expansion valve (if used) to optimise the evaporator charge. It controls operation of the fans (on air-cooled
units) or water valves (on water-cooled units) to maintain the
correct head pressure in each circuit.
Safety circuits are constantly monitored by PRO-DIALOG
Plus to ensure safe operation of the unit. PRO-DIALOG Plus
also gives access to a Quick Test program covering all inputs
and outputs.
The following abbreviations are frequently used:
AI
- Analogue Input
AO
- Analogue Output
CCn - Operating type: CCN
CCN - Carrier Comfort Network.
This is the Carrier communication network
DI
- Discrete Input
DO
- Discrete Output
EXV - Electronic Expansion Device
LED - Light Emitting Diode
LOFF - Operating type: Local off
L-ON - Operating type: Local operation
MASt - Master unit operating type (master/slave assembly)
RCPM - Reciprocating Compressor Protection Module
rEM - Operating type: by remote control contacts
SCT - Saturated disCharge Temperature
SIO
- Standard Input/Output - internal communication bus
linking the basic board to the slave boards
SST - Saturated Suction Temperature
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 capabilities but does not offer any of the features of the CCN network.
5
3 - HARDWARE DESCRIPTION
The various control components are arranged in modules
within the control cabinet:
•
Control module: This comprises the basic board, the
user interface, the EXV control board and option boards,
as well as the customer’s terminal block.
•
Start-up module: This consists of the start-up boards,
compressor protection boards, as well as the compressor
circuit breakers and contactors.
•
Fan module (air-cooled unit): Consists of one or two
4xDO boards together with the fan circuit breakers and
contactors.
3.1 - General
Control board
2
9
1
8
3
4
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.
5
7
6
Legend
1 CCN connector
2 Red LED, status of the board
3 Green LED, communication bus SIO
4 Orange LED, communication bus CCN
5 Remote master board customer control connection contacts
6 Remote master board customer control connection signal
7 Remote master board customer report connection contacts
8 Master PD4 basic board
9 CCN/clock board
NOTE: After a power cut the unit restarts in the same
operating mode as before the power cut.
The control system consists of at least a PD4 basic board, a
user interface, a PD4-EXV slave board and, depending on the
application, one or more RCPM compressor boards, 4xDO
boards or 4xAI-2xAO boards and an NRCP-BASE slave board.
Slave boards are connected to the basic board via an internal
communication bus (SIO).
The CCN/clock board is connected and screwed to the master
basic board. It permits communication with elements of the
Carrier Comfort Network via the CCN bus.
3.2.2 - Slave boards
•
Compressor board RCPM: This board is used to control
a compressor. Up to eight RCPM boards can be connected
to the basic board.
•
4xDO board: This board can be used to control fan stages.
•
PD4-EXV board: This board can control two EXV valves
and two suction temperature sensors.
•
4xAI-2xAO board: This optional board can be used to
read sensors (oil pressure), or to control variable speed
fans (air-cooled units) or the condenser valve (water-cooled
units).
•
NRCP-BASE board: This optional board is used to control
the inputs and outputs of the heat reclaim option.
Control box
Legend
1 Power supply disconnect switch
2 Fan start-up module
6
3
4
5
Compressor start-up module
Control system
User interface
3.2.3 - The user interface
The user interface is in two parts:
•
The main interface: This gives access to all of the
control parameters for the unit. It consists of a 2-digit
primary display block and a secondary 4-digit display
block with 10 LEDs and 5 buttons.
•
The summary interface: This gives quick access to just
the main control parameters for the unit. It comprises 12
buttons and 16 LEDs, and includes a schematic diagram
of the unit.
3.2.4 - Connections between boards
The basic board and slave boards communicate with each other
over an internal three-wire RS485 communication bus (SIO
bus). These three wires link all the boards in parallel.
3.2.7 - Light emitting diodes on boards
All boards continuously check and indicate the proper
operation of their electronic circuits. A light emitting diode
(LED) lights on each board when it is operating properly.
Red LED
•
•
Green LED
(item SIO on the 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
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 continuously to show that the board is
communicating correctly over its internal bus.
If this LED is not flashing, check the wiring of the SIO
bus and the address of the board (slave board only). If the
basic board is not linked to any slave boards, this LED
should not flash.
If all slave boards indicate a communication fault, check
the SIO bus connection on the basic board. If this
connection is correct and the fault persists, replace the
basic board.
Orange LED - CCN/clock board
•
NOTE: Any incorrect address will prevent the unit from
starting. Turn off the power before amending the address of
any auxiliary board.
Board addresses
Board
Address switch
8
7
6
5
4
3
2
1
PD4-EXV
0
0
0
1
1
1
0
1
4xDO Fan board # 1
0
0
1
0
0
1
1
1
4xDO Fan board # 2
0
0
1
0
1
0
1
1
4xAI-2xAO board # 1
0
0
1
0
1
1
1
1
4xAI-2xAO board # 2
0
1
1
1
1
0
0
0
RCPM # 1 (compressor A1)
1
1
0
1
0
1
0
0
RCPM # 2 (compressor A2)
1
1
0
1
1
1
1
1
RCPM # 2 (compressor A3)
1
1
0
1
1
0
0
1
RCPM # 2 (compressor A4)
1
1
1
0
0
1
0
0
RCPM # 3 (compressor B1)
1
1
1
0
1
0
1
0
RCPM # 4 (compressor B2)
1
1
1
1
0
1
0
1
RCPM # 4 (compressor B3)
1
1
1
0
1
1
1
1
RCPM # 4 (compressor B4)
1
1
1
1
0
0
1
0
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.
NOTE: When connecting the power supply for the boards,
maintain polarity.
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.
This LED flashes to show that the basic board is communicating via the CCN bus.
3.3 - The controls
3.3.1 - Electronic expansion valve (EXV)
The EXV is used to adjust the refrigerant flow to changes in
the operating conditions of the machine. For this purpose, a
series of calibrated orifices are machined into the wall of the
refrigerant inlet port. As the refrigerant passes through these
orifices, it expands and becomes a bi-phase mixture (liquid and
gas).
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.
NOTE: The external connector of the EXV must be cleaned
and coated with silicone grease (Part No. 397 EE) to keep out
condensation and prevent corrosion.
3.3.2 - The head pressure controls
The controller can deal with the following:
•
in the case of air-cooled units, for each circuit, fan stages
together with, if necessary, a variable speed fan (controlled
by an optional 4xAI-2xAO board)
•
in the case of water-cooled units, a water valve. This valve
is controlled by an optional 4xAI-2xAO board which can
deliver a 0-10 V d.c. or 4-20 mA signal, depending on the
configuration.
7
3.3.3 - The evaporator pumps
The controller can regulate one or two evaporator pumps, with
automatic changeover between the two pumps.
3.3.4 - The condenser pump
In appropriate cases the controller can regulate a condenser
pump (for water-cooled units or air-cooled units with heat
reclaim option). This control does not require an additional
board.
3.3.5 - Pressure sensors
These are used to measure the following pressures in each
circuit:
•
Discharge gas pressure (high pressure type)
•
Suction pressure (low pressure type)
•
Oil pressure (option)
These electronic sensors deliver 0 to 5 V d.c. to the main board
or to a 4xAI-2xAO slave board. Two sensor versions are used;
one is calibrated for high pressure and the other for low
pressure and oil pressure.
Discharge pressure sensors
These are on the high pressure side of the lead compressor in
each circuit. They replace the usual discharge gas pressure
gauges and can be used to control head pressure or by the high
pressure load shedding option.
Oil pressure sensors
If installed, these sensors are used to measure the compressor
oil pressure on the oil pressure discharge side. The suction
pressure is subtracted from the oil pressure value to arrive at
the differential oil pressure.
Suction pressure sensors
They are located in the low-pressure side of the unit on the lead
compressor of each circuit. The suction pressure sensor reading
is used to control the electronic expansion devices EXV. They
permit replacement of the low-pressure switches, low-pressure
gauges and possibly of the oil pressure safety switch.
3.3.6 - Thermistors
These all have similar characteristics.
Evaporator entering water temperature sensor
The evaporator entering water temperature sensor is installed in
the evaporator wall in the free space at the side of the tube
bundle.
Evaporator leaving water temperature sensor
The evaporator leaving water temperature sensor is installed in
evaporator leaving water piping: The sensor bulb is directly
immersed in the water.
Compressor suction sensor
This is located in the lead compressor of each circuit in the
suction gas line situated between the motor and the cylinders
above the oil pump.
Condenser entering and leaving water temperature sensors
These are used to control the heating capacity on heat pumps.
In cooling only units they have no control function. They are
installed in the common condenser entering and leaving line.
Heat reclaim condenser entering/leaving water temperatures
These sensors measure the entering and leaving water temperatures of heat reclaim condensers and are used on air-cooled
units equipped with the heat reclaim option. If not, they may be
fitted as options. In this case they only have informative
character.
Temperature setpoint reset sensor
This is an optional 0-10 V sensor which can be installed
remotely from the unit. It is used to reset the cooling and
heating setpoint on the unit as a function of either the outdoor
air temperature or ambient room temperature. The sensor is not
supplied by Carrier, and must be configured by the User Menu.
Outdoor temperature sensor
Mounted on the control box. It is used for start-up, setpoint
temperature reset and frost protection control.
Master/slave assembly temperature control
The optional water temperature sensor can be used for master/
slave assembly control.
8
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
J3 / CH24
30A - 31A
Indicates alarms in circuit A
Alarm relay output, circuit B
J3 / CH25
30B - 31B
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
32 - 33
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
J4 / CH12
65 - 66
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
J4 / CH13
63 - 64
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
73 - 74
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
J8 / CH10
71 - 72
Connector: 2 pin WAGO 231This 0-10 V d.c. input is used for setpoint reset or unit
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 -
or
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/
channel
Condenser water flow
switch input
J5/CH17
Terminal
Description
Remarks
This contact is used to detect lack of condenser water flow and
shuts down the unit.
24 V a.c - 20mA
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
J2/CH19
This contact permits control of evaporator 1 pump by the unit*.
24 V a.c. internal supply.
Evaporator 2 control
J2/CH20
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.
9
4 - SETTING UP PRO-DIALOG PLUS CONTROL
4.1 - Local interface general features
MAIN INTERFACE
SUMMARY INTERFACE
DUAL-CIRCUIT AIR-COOLED
CHILLER INTERFACE
MENU BLOCK
The local interface enables a number of operating parameters to
be displayed and modified.
The interface consists of two distinct parts: the main interface
(left hand section) and the summary interface (right hand
section).
MAIN INTERFACE
MENU BLOCK
SUMMARY INTERFACE
DUAL-CIRCUIT WATER-COOLED
CHILLER INTERFACE
Main interface
It gives access to all PRO-DIALOG PLUS data and operating
functions. It consists of:
•
A two-digit display showing the number of the item
selected.
•
A four-digit display showing the contents of the item
selected.
•
LEDs and buttons for unit start/stop, menu selection,
menu item selection and value adjustment.
MAIN INTERFACE
BUTTON NAME
DESCRIPTION
Menu
Permits the selection of a main menu. Each main menu is represented by an icon. The icon is lit if active.
Up arrow
Permits scrolling through the menu items (in the two-digit display). If the modification mode is active this button authorises
increase of the value of any parameter.
Down arrow
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.
Enter
Gives access to the modification mode, validates a modification or displays expanded item description.
Start/stop
Authorises start or stop of the chiller in local mode or modification of its operating type.
MAIN INTERFACE MENU LEDS
LED
NAME
DESCRIPTION
INFORMATIONS menu
Displays the general operating parameters for the unit.
TEMPERATURES menu
Displays the unit operating temperatures.
kPa PRESSURES menu
10
Displays the unit operating pressures.
SETPOINTS menu
Displays the unit setpoints and enables them to be modified.
INPUTS menu
Displays the status of the unit digital and analogue inputs.
OUTPUTS/TESTS menu
Displays the status of the unit outputs and enables them to be tested.
CONFIGURATIONS menu
Displays the unit configuration and enables it to be modified.
ALARMS menu
Displays active alarms.
ALARMS HISTORY menu
Displays the history of the alarms.
OPERATING LOG menu
Displays the operating times and number of starts for the unit and the compressors.
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:
OPERATING TYPES
SUMMARY INTERFACE LEDS
4-DIGIT DISPLAY DESCRIPTION
LED
INDICATION WHEN LIT
LOFF
Local Off. The unit is halted in local mode.
Green LED:
The unit is authorised to start or is already running
L-On
Local On. The unit is in local control mode and is authorised
to start.
Red LED:
- Lit: circuit A or unit shut down by alarm
- Flashing: circuit A or unit running with alarm present
L-Sc*
Red LED:
- Lit: circuit B or unit shut down by alarm
- Flashing: circuit B or unit running with alarm present
Local On - timer control. The unit is in local control mode. It
is authorised to start if the period is occupied. If the timer
program for unit operation is unoccupied, the unit remains
shut down until the period next becomes occupied.
CCN*
CCN. The unit is controlled by CCN commands.
Red LED:
Water flow switch default or user safety lock open.
rEM*
Remote. The unit is controlled by remote control contacts.
MAST*
Master Unit. The unit runs as a master in a two unit lead/lag
arrangement. This is displayed if the unit is configured for
master/slave control. See section 5.19.
Green LED:
The evaporator pump is running.
Yellow LEDs:
From top to bottom - start/stop status of compressors A1, A2, A3 and A4
or B1, B2, B3 and B4. Flashing LED indicates that the circuit is in the
protection or defrost mode (A or B).
Green LED:
The unit operates in heating mode.
Green LED:
The unit operates in cooling mode.
Legend
*
Displayed if the configuration requires it.
Section 5.1 gives a more detailed description of the commands to start/stop
the unit, analysed by operating type.
4.2.2 - Stopping the unit in local mode
The unit can be stopped in local mode at any time by pressing
the Start/Stop button.
SUMMARY INTERFACE PUSH BUTTONS
TO STOP THE UNIT
BUTTON DISPLAY
BUTTON ACTION
Blue button: evaporator leaving or entering water temperature in °C
Gray button: outdoor air temperature in °C
Control point (setpoint + reset) in °C
kPa
kPa
Press 1: circuit A/B discharge pressure in kPa
Press 2: circuit A/B saturated condensing temperature in °C
Press 1: circuit A/B suction pressure in kPa
Press 2: circuit A/B saturated suction temperature in °C
2-DIGIT DISPLAY
4-DIGIT DISPLAY
Press the Start/Stop
button for less than
4 seconds (one short
press is enough).
C
LOFF
If the button is
released, the unit stops
without the need for
further action.
t
LOFF
Press 1: compressor A1/B1 operating hours in h/10 or h/100
Press 2: compressor A2/B2 operating hours in h/10 or h/100
4.2 - Unit start/stop control
4.2.1 - Description
The unit start/stop can be controlled by one of the following
methods:
•
Locally on the actual unit (Local control type)
•
By remote control with the aid of user contacts (remote
control type)
•
By CCN control with the aid of the CCN (CCN control
type)
The main interface includes a Start/Stop button which can be
used to stop or start the unit in the local operating type or to
select the remote or CCN operating type.
The available operating types are described in the following
table.
4.2.3 - Starting unit and selecting an operating type
The unit can be started in local mode, or unit operating type
can be changed at any time using the Start/Stop button. In the
example that follows, the unit is stopped (LOFF) and the user
wants to start the unit in local mode.
CHANGING THE OPERATING TYPE
BUTTON ACTION
Continually press the operating type selection
button for more than 4 seconds.
2-DIGIT
DISPLAY
C
Hold down the Start/Stop button.
The available operating types are displayed
one by one until the button is released.
4-DIGIT
DISPLAY
LOFF
L-On
L-Sc
rEM
L-On
Release the Start/Stop button if the operating
type you want is displayed (in this example LOn). "C" flashes in the 2-digit display to show
that the controller is awaiting confirmation.
Press the Enter button to confirm the
operating type selected (in this example: LOn). "t" is displayed in the 2-digit display to
indicate the operating type selected. If the
Enter button is not pressed soon enough, the
controller will cancel the change and continue
to use the previous operating type.
t
L-On
11
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.
4.3.2 - Selecting a menu item
The up and down Arrow buttons let you scroll through the
menu items. Menu item numbers are displayed in the two-digit
display. The item number increases or decreases every time
you press the up or down Arrow button. The menu items that are
not in use or incompatible with the configuration are not
displayed. The value or status associated with the active item
is displayed in the four-digit display. To scroll quickly through
the items, hold the up or down Arrow button down.
The following example shows how to access item 3 in the
Pressures menu.
SELECTING A MENU ITEM
OPERATION
PRESS
BUTTON
MENU LED
Press the MENU button until the
LED marked PRESSURE lights.
ITEM NUMBER
2-DIGIT
DISPLAY
MODIFYING THE VALUE OF A PARAMETER
OPERATION
0
1
kPa
PRESS MENU LED
button
Hold on the MENU button until
the LED for SETPOINT lights.
ITEM
NUMBER
2-DIGIT
DISPLAY
ITEM
NUMBER
4-DIGIT
DISPLAY
0
0
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).
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.
Keep pressing the Down Arrow
button until the value 5.7 is
displayed in the four-digit display.
The Setpoint menu LED keeps
flashing.
0
kPa
Press one of the Arrow buttons
until the two-digit display shows 3
(item number 3).
The example below shows how to modify the value of item 1
in the Setpoint menu.
Press the Enter button again to
validate the change. The new
setpoint is 5.7°C. The Setpoint
menu LED stops flashing, indicating that modification mode no
longer applies.
1
1
6.0
1
6.0
1
5.9
1
5.8
1
5.7
1
5.7
2
3
4.3.3 - Modifying the value of a parameter/access to a submenu
Press the Enter button for more than 2 seconds to enter the
modification mode or to select a sub-menu. This lets you correct
the value of an item or select a sub-menu with the aid of the up
and down Arrow buttons (if you are authorised to overwrite the
item concerned). When modification mode is activated, the
LED for the main menu to which the item belongs flashes in
menu block. Once the required value is obtained, press the
Enter button again to validate the change or to access the submenu. The LED for the menu to which the item belongs then
stops flashing, indicating that modification mode no longer
applies.
In modification mode, the value to be modified increases or
decreases in steps of 0.1 every time you press the Arrow
buttons. Holding one of these buttons down increases the rate
of increase or decrease.
12
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.
STATUS
USER 1
[USEr 1]
PRESSURES
SUB-SUB-SUB-MENUS
TEMPERATURES
USER 2
[USEr 2]
HOLIDAYS 4
[HoLidAy 4]
HOLIDAYS 5
[HoLidAy 5]
HOLIDAYS 6
[HoLidAy 7]
HOLIDAYS 7
[HoLidAy 7]
HOLIDAYS 8
[HoLidAy 8]
PERIOD 4
[PEriod 4]
PERIOD 5
[PEriod 5]
PERIOD 6
[PEriod 6]
PERIOD 7
[PEriod 7]
PERIOD 8
[PEriod 8]
PERIOD 4
[PEriod 4]
PERIOD 5
[PEriod 5]
PERIOD 6
[PEriod 6]
PERIOD 7
[PEriod 7]
PERIOD 8
[PEriod 8]
HOLIDAYS 16
[HoLidAy16]
HOLIDAYS 15
[HoLidAy15]
---
---
---
HOLIDAYS 3
[HoLidAy 3]
PERIOD 3
[PEriod 3]
HOLIDAYS 2
[HoLidAy 2]
PERIOD 2
[PEriod 2]
PERIOD 2
[PEriod 2]
PERIOD 3
[PEriod 3]
HOLIDAYS 1
[HoLidAy 1]
PERIOD 1
[PEriod 1]
HOLIDAYS
[HoLidAy]
PERIOD 1
[PEriod 1]
USER
[USEr]
OUTPUTS
SCHEDULE 2
[SCHEduLE 2]
INPUTS
SCHEDULE 1
[SCHEduLE 1]
SETPOINTS
HOUR + DATE
[dAtE]
ALARMS
BROADCAST
[brodCASt]
SERVICE 2
[SErviCE 2]
ALARMS HISTORY
SERVICE 1
[SErviCE 1]
SUB-SUB-MENUS
SUB-MENUS
CONFIGURATION
MAIN MENUS
SERVICE
[SErviCE]
SERVICE 3
[SErviCE 3]
FACTORY
[FACtorY]
RUNTIME 2
[RuntiME 2]
MAINTENANCE
[MAintEnAnCE]
NOTE: The items in brackets show what is
displayed on the user interface.
MASTER/SLAVE
[MAStEr SLAvE]
RUNTIME 1
[RuntiME 1]
RUNTIME
4.4 - General menu structure
13
14
Suction pressure,
circuit B
Minutes left before Condenser water
starting
leaving temperature
Heat reclaim water
entering temperature
Heat reclaim water
leaving temperature
Saturated suction
temperature, circuit A
Suction temperature,
compressor A1
Unit capacity in %
Capacity circuit A
in %
Capacity circuit B
in %
Present demand
limit in %
Setpoint in local
control
Setpoint occupied/ Suction temperature
unoccupied mode compressor B1
-
Heat reclaim
selection
Present lag limit in Saturated discharge
%
temperature, circuit B
Water loop temp.,
master/slave assembly
Cooling/heating
selection
Active setpoint
Control point
Controlled water
temperature
Condensing point
Heat reclaim
indicator, circuit A
Heat reclaim
indicator, circuit B
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Legend
** Displayed if the alarm exists
Not in use
Discharge pressure,
circuit B
Chiller occupied/
unoccupied
2
-
-
Outdoor temperature
Superheat, circuit B
Saturated suction
temperature, circuit B
Superheat, circuit A
Saturated discharge
temperature, circuit A
Condenser water
entering temperature
Evaporator water
leaving temp.
Active modes
1
-
-
-
-
-
-
-
-
Heating - max. reset
value
Heating - threshold for
max. reset
-
-
Heat reclaim pressure,
circuit B
Heat reclaim pressure,
circuit A
Oil differential pressure, Heating - threshold for
compressor B4
zero reset
Oil differential pressure, Cooling - max. reset
compressor B3
value
Oil differential pressure, Cooling - threshold for
compressor B2
max. reset
Oil differential pressure, Cooling - threshold for
compressor A4
zero reset
Oil differential pressure, Heating mode ramp
compressor A3
Oil differential pressure, Cooling mode ramp
compressor A2
Oil differential pressure, Demand limit setpoint
compressor B1
in %
Heat reclaim setpoint
Condensing setpoint
Oil differential pressure, Heating setpoint
compressor A1
Suction pressure, circuit Cooling setpoint 2
A
Cooling setpoint 1
SETPOINTS
OUTPUTS
-
-
-
-
-
-
-
-
-
External 0-10 V d.c.
signal
Control box thermostat
Water flow control,
condenser
Evaporator pump fault
detection
Water flow & customer
interlock control
Demand limit selection
Contact 4: remote heat
reclaim operation
Contact 3: remote
heating/cooling
Contact 2: remote
setpoint
-
Water pump 1 status
-
-
User test interface
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Historic alarm code 10 -
Historic alarm code 9
Historic alarm code 8
Historic alarm code 7
Historic alarm code 6
-
-
SUB-MENU:
Maintenance
SUB-MENU:
Runtimes 1
SUB-MENU:
Runtimes 1
RUNTIMES
NOTE: The items in brackets show what is displayed on the
user interface.
-
-
-
-
-
Solenoid status, heat
reclaim function
-
-
-
-
-
-
-
-
-
Active alarm code 5**
Historic alarm code 5
Active alarm code 4**
Cond. water valve posi- tion, heat reclaim mode
Evap. heater & heat
reclaim cond. status
Condenser pump status -
-
-
Variable speed fan,
circuit B or cond. water
valve position in %
-
-
-
-
Historic alarm code 4
Historic alarm code 3
Historic alarm code 2
Historic alarm code 1
ALARMS HIST
Active alarm code 3**
Active alarm code 2**
SUB-MENU:
Factory Configuration
[FACtorY]
-
Active alarm code 1**
SUB-MENU:
Service Configuration
[SErviCE]
-
Water pump 2 status
ALARMS
Number of active alarms/
SUB-MENU:
User Configuration [USEr] resets
CONFIG
Variable speed fan,
circuit A or cond. water
valve position in %
EXV position, circuit B
EXV position, circuit A
Alarm circuit status,
circuits A & B
Fan contactor status,
circuit B
Fan contactor status,
circuit A
Capacity reduction
status, circuits A & B
Compressor status,
circuit B
Contact 1: remote on/off Compressor status,
circuit A
INPUTS
MENU
Discharge pressure,
circuit A
Evaporator water
entering temp.
Default display
PRESSURES
TEMP
STATUS
0
ITEM
4.5 - Menu tree structure
4.5.1 - Description of the Information menu
INFORMATION MENU [3]
ITEM
FORMAT
UNITS
DESCRIPTION
Automatic display mode. It cycles through the following displays:
0
±nn.n
°C
LOFF
L-On
L-Sc
CCn
rEM
MASt
-
OFF
rEADY
dELAY
-
StOPPing
running
triPout
OvErridE
-
1:
2:
3:
4.
OCCUPIEd
UNOCCUPIEd 5.
Controlled water temperature: temperature of the water that the unit tries to maintain at the control point.
Unit operating type
Local Off
Local On
Local On - based on unit clock.
CCN Control.
Remote Control
Master unit
Unit status
Off: Unit is stopped and not authorised to start.
Ready: Unit is authorised to start
Delay: Unit is in delay at start-up. This delay is active after the unit has been switched on. The delay can be
configured in the User Configuration menu.
Stopping: Unit is currently stopping.
On: Unit is running or authorised to start.
Fault shutdown.
Limit: The operating conditions do not allow total unit operation.
Unit occupied/unoccupied status
Occupied: Unit in occupied mode
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
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
COOL
HEAT
rECLAIM
-
ALArM
ALErt
-
MAStEr
SLAvE
-
nn
-
Active mode codes. Each active mode is displayed in turn. This Item is masked when nil. Pressing the enter button when a mode code
is displayed causes a character text expansion to be scrolled accross the four-digit display. See the description in the following table
-
This item indicates the current chiller occupied/unoccupied mode.
Occupied
Unoccupied
The value is displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.
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
in LOFF, L-On or L-Sc operating type. Displayed for heat pumps.
Heating mode selection
Cooling mode selection
YES
NO
-
Heat reclaim mode selection: This item is accessible in read/write, if the unit is in local control mode. It is only displayed, if the unit is
in LOFF, L-On or L-Sc operating type. Displayed for air-cooled or water-cooled units with a condenser water valve.
Heat reclaim mode selection, use of heat reclaim condensing setpoint.
Normal cooling mode selection, use of standard condensing setpoint
6
Nnn
%
Total active capacity of unit.
7
nnn
%
Total active capacity of circuit A.
8 [2]
nnn
%
Total active capacity of circuit B.
9 [2]
nnn
Forc
%
Present demand limit. This is the authorised operating capacity of the unit. See section 5.8.
The value is displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.
6.
7.
1 [1]
2 [2]
occu
unoc
Forc
3
nn.n
4 [2]
HEAt
COOL
5 [2]
10
nnn
11 [2]
%
Present lag chiller demand limit. Displayed when the master/slave control is selected.
-
Setpoint select in local mode. This point is read/write accessible. Displayed only when the unit is LOFF, L-On or L-Sc operating type.
SP-1 = cooling setpoint 1
SP-2 = cooling setpoint 2
AUtO = active setpoint depends on schedule 2 (setpoint selection schedule). See section 5.7.1 & 4.5.7.6.
-
Setpoint occupied mode.
Occupied: cooling setpoint 1 is active
Unoccupied: cooling setpoint 2 is active
The value shall be displayed in turn with 'Forc' when the unit is in CCN control and if this variable if forced through CCN.
Active setpoint. This is the current cooling/heating setpoint: it refers to cooling/heating setpoint 1 or 2.
SP-1
SP-2
AUtO
12 [2]
occu
unoc
Forc
13
±nn.n
°C
14
±nn.n
Forc
°C
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.
15
±nn.n
°C
Controlled water temperature. Water temperature that the unit tries to maintain at the control point.
16
±nn.n
Forc
°C
°C
Condensing setpoint. The value is displayed in turn with 'Forc' if the unit is in CCN mode and this parameter is forced by CCN.
17
n
Heat reclaim function indicator, circuit A (see heat reclaim section)
18
n
Heat reclaim function indicator, circuit B (see heat reclaim section)
Legend
1 This item is masked when nil.
2 This item is displayed in certain unit configurations only.
3 Access to this menu is read-only except for item 10 that can be forced when the unit is in Local operating type.
15
DESCRIPTION OF OPERATING MODES (ITEM 1 OF THE INFORMATION MENU)
MODE # MODE NAME
DESCRIPTION
7
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.
8
2nd cooling setpoint active
The second cooling setpoint is active. See section 5.7.1
9
Setpoint reset active
In this mode, the unit uses the reset function to adjust the leaving or entering water temperature setpoint. See
section 5.7.2.
10
Demand limit active
In this mode, the capacity at which the unit is allowed to operate is limited. See section 5.8.
11
Ramp loading active
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).
12
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
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.
17,18
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
21
Heat reclaim active
Circuit A or circuit B operates in heat reclaim mode and not in standard cooling mode (pumpdown phase is
activated).
22
Evaporator heater active
Mode active if risk of frost exists.
23
Evaporator pump reversal active
Two evaporator water pumps installed on the unit and pump reversal is active. See section 5.3
24
Periodic evaporator pump start-up
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.
25
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.
26
Unit under SM control
Unit is under control of a System Manager (FSM or CSM III).
27
Master/slave link active
Unit is connected to a secondary unit by a master slave link and either:
- the unit is configured as a master and this master is operating, or
- the unit is configured as a slave and this slave is operating.
4.5.2 - Description of the Temperatures menu
TEMPERATURES MENU [2]
ITEM
FORMAT UNITS
COMMENTS
0
±nn.n
°C
Evaporator entering water temperature
1
±nn.n
°C
Evaporator leaving water temperature
2[1]
±nn.n
°C
Condenser entering water temperature
3[1]
±nn.n
°C
Condenser leaving water temperature
4[1]
±nn.n
°C
Reclaim condenser entering water temperature
5[1]
±nn.n
°C
Reclaim condenser leaving water temperature
6
±nn.n
°C
Saturated discharge temperature circuit A
7
±nn.n
°C
Saturated suction temperature circuit A
8
±nn.n
°C
Suction temperature compressor A1
9
±nn.n
°C
Superheat circuit A
10[1]
±nn.n
°C
Saturated discharge temperature circuit B
11[1]
±nn.n
°C
Saturated suction temperature circuit B
12[1]
±nn.n
°C
Suction temperature compressor B1
13[1]
±nn.n
°C
Superheat circuit B
14[1]
±nn.n
°C
Outdoor temperature
15[1]
±nn.n
°C
Water loop temperature, master/slave assembly
Legend
1 This item is displayed in certain unit configurations only
2 Access to this menu is read-only.
16
4.5.3 - Description of the Pressures menu
PRESSURES MENU [2]
ITEM
FORMAT
UNITS
0
nnnn
kPa
COMMENTS
Discharge pressure circuit A
1
nnnn
kPa
Suction pressure circuit A
2
nnnn
kPa
Differential oil pressure compressor A1
3
nnnn
kPa
Discharge pressure circuit B
4
nnnn
kPa
Suction pressure circuit B
5
nnnn
kPa
Differential oil pressure compressor B1
6[1]
nnnn
kPa
Differential oil pressure compressor A2
7[1]
nnnn
kPa
Differential oil pressure compressor A3
8[1]
nnnn
kPa
Differential oil pressure compressor A4
9[1]
nnnn
kPa
Differential oil pressure compressor B2
10[1]
nnnn
kPa
Differential oil pressure compressor B3
11[1]
nnnn
kPa
Differential oil pressure compressor B4
12[1]
nnnn
kPa
Pumpdown pressure, heat reclaim, circuit A
13[1]
nnnn
kPa
Pumpdown pressure, heat reclaim, circuit B
Legend
1 This item is displayed in certain unit configurations only.
2 Access to this menu is read-only
4.5.4 - Description of the Setpoints menu
SETPOINTS MENU [2]
ITEM
FORMAT UNITS
RANGE
COMMENTS
0
±nn.n
°C
See table below
This item lets you display and modify Cooling setpoint 1*
1
±nn.n
°C
See table below
This item lets you display and modify Cooling setpoint 2*
2
nnn
°C
See table below
This item lets you display and modify Heating setpoint*, only displayed for heat pumps.
3 [1]
nnn
°C
See table below
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
This item lets you display and modify the heat reclaim setpoint*. As item 3, this is used for condensing
setpoint control.
5
nnn
%
0 to 100
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]
See table below
Zero reset threshold, cooling mode**
9 [1]
±nn.n
[3]
See table below
Full reset threshold, cooling mode**
10 [1]
±nn.n
°C
See table below
Full reset value, cooling mode**
11 [1]
±nn.n
[3]
See table below
Zero reset threshold, heating mode**
12 [1]
±nn.n
[3]
See table below
Full reset threshold, heating mode**
13 [1]
±nn.n
°C
-16 to 16
Full reset value, heating mode**
Legend
1 This item is displayed in certain unit configurations only.
2 All points contained in this table can be modified.
*
Those setpoints can be used for entering or leaving water temperature control. By default the unit controls the evaporator entering fluid temperature.
Leaving fluid temperature control requires a parameter modification in the Service Configuration menu.
** These parameters are only accessible when reset based on OAT or delta T has been selected in the User Configuration 1 menu. See section 4.5.7.3.
SETPOINT
DESCRIPTION
Cooling
Heating
CONTROL FOR
LEAVING WATER
CONTROL FOR
ENTERING WATER
Minimum setpoint
- Water
- Medium Brine
- Low Brine
Maximum setpoint
3.3°C
-10°C
-20°C
9.3°C
-4°C
-14°C
Maximum setpoint
MCT - 4.0
MCT - 10.0
Note:
Three setpoint reset configuration modes can be selected in the Client1 menu:
1 Reset using an external 0-10 V d.c. signal
2 Reset using Delta T
3 Reset by external temperature sensor (air-cooled units only)
The items with zero reset or maximum reset are based on these three modes.
17
4.5.5 - Description of the Inputs menu
INPUTS MENU [2]
ITEM
FORMAT
UNITS
COMMENTS
0
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.
1
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]
OPEn/CLoS
-
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
3[3]
OPEn/CLoS
-
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.
4
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.
5
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]
OPEn/CLoS
-
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]
OPEn/CLoS
-
Condenser water flow control. Controls the condenser water circulation.
8[1]
OPEn/CLoS
-
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
1 This item is displayed in certain unit configurations only
2 Access to this menu is read-only
*
Active in all operating types
See section 3.4
4.5.6 - Description of the Outputs/Tests menu
4.5.6.1 - General
This menu displays the status of the controller outputs. Moreover, when the machine is fully stopped (LOFF) the outputs
can be activated for manual or automatic tests (the access to the
tests is password controlled).
4.5.6.2 - Menu description
OUTPUTS STATUS AND TESTS MENU [2] [3]
ITEM
FORMAT
UNITS
0
-
1 [1]
-
2 [1]
tEST
-
3 [1]
tESt
-
18
DESCRIPTION.
Compressor status
b1 = compressor A1
b2 = compressor A2
b3 = compressor A3
b4 = compressor A4
This item permits display of the compressor status in circuit A. It also permits independent testing. In test mode the direction
arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
Compressor status
b1 = compressor B1
b2 = compressor B2
b3 = compressor B3
b4 = compressor B4
This item permits display of the compressor status in circuit B. It also permits independent testing. In test mode the direction
arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
Capacity reduction status, circuits A & B
b1 = capacity reduction A1
b2 = capacity reduction B1
This item permits display of the capacity reduction status in circuit A. It also permits independent testing.
Fan contactor status/test, circuit A
b1 = fan contactor assembly 1
b2 = fan contactor assembly 2
b3 = fan contactor assembly 3
b4 = fan contactor assembly 4
This item permits display of the fan stages. It also permits independent testing. In test mode the direction arrows permit
successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
OUTPUTS STATUS 2 AND TESTS MENU [2] [3] - cont.
ITEM
FORMAT
4 [1]
tESt
5
tESt
UNITS
-
-
DESCRIPTION
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.
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.
6
tESt
%
EXV position, circuit A
In the test mode the direction arrows permit forcing the valve to its fully open position.
7
tESt
%
EXV position, circuit B
In the test mode the direction arrows permit forcing the valve to its fully open position.
8 [1]
tESt
%
Variable speed fan, circuit A or condenser water valve position in %
9 [1]
tESt
%
Variable speed fan, circuit B or condenser water valve position in %
10
On
Stop
tESt
FAIL
Good
Forc
-
Evaporator water pump No. 1 command status. Not displayed if unit does not control a pump.
On: the pump operates
Stop: the pump has stopped
Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump
without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it is
then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with 'Forc' if its
status is forced by CCN.
During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display
appears:
- Fail: displayed if the test has failed, because the pump is not started
- Good: displayed if the test succeeds
11
On
OFF
tESt
FAIL
Good
Forc
-
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.
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
12
On
OFF
tESt
FAIL
Good
Forc
-
Condenser pump status/test
On: the pump operates
Stop: the pump has stopped
Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump
without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it is
then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with 'Forc' if its
status is forced by CCN.
During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display
appears:
- Fail: displayed if the test has failed, because the pump is not started
- Good: displayed if the test succeeds
-
13[1]
14[1]
-
Evaporator heater and heat reclaim condenser status
b1 = evaporator heater
b2 = heat reclaim condenser heater
%
Condenser water valve position in heat reclaim mode
nn
tESt
15[1]
-
16
YES
no
tESt
Solenoid valve status/test, heat reclaim function
b1 = heat reclaim coil shutoff solenoid valve, circuit A
b2 = heat reclaim coil drain solenoid valve, circuit A
b3 = heat reclaim coil shutoff solenoid valve, circuit B
b4 = heat reclaim coil drain solenoid valve, circuit B
In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation
of each output.
Used only for local interface
Cause all diodes and blocks to light up or flash, to verify that they are operating correctly
Legend
1 This item is displayed in certain unit configurations only
2 A test is only possible if the units are in local off mode and if all compressors have stopped
3 The password is only valid for the test. 'Test' is displayed during the test, alternating with the item number
19
4.5.6.3 - Manual tests
This function allows the user to test the outputs individually, if
the machine is completely shut down (LOFF). To carry out a
manual test use the arrow keys to access the output to be tested
and press the Enter key (longer than 2 seconds) to activate the
modification mode. The 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 4digit display alternately with the value tested. The Outputs/Test
LED stops flashing. Press the Enter key or an arrow key to stop
the test.
4.5.7 - Description of the Configuration menu
4.5.7.1- General
This menu can be used to display and modify all configurations: Factory, Service and User. Only the User Configuration
can be modified by the end-user. The Factory, Service and
master/slave configurations are not described in this document. A configuration can only be modified if the unit is fully
stopped (LOFF).
The menus User 1 [USEr 1] and User 2 [USEr 2] are password-protected. The other menus are directly accessible, except
if item 12 of the User 1 menu (password for all configurations)
has been validated.
4.5.7.2 - Password
A password must be entered in order to access the test function
or to modify a configuration. It is automatically requested, if
necessary: 'EntEr PASS' is displayed on the 4-digit display and
the configuration menu LED flashes, indicating that the modification mode is active. Press the arrow keys until the value '11'
is displayed on the 4-digit display. Press Enter to validate this.
The configuration menu LED stops flashing. If the password is
correct, 'Good' is displayed. If the password is incorrect, 'PASS
incorrEct' is displayed. The User password has a default value
of 11.
This value can be modified through the Service configuration.
The password can be entered if the unit is fully stopped, otherwise 'ACCES dEniEd' (access denied) will be displayed on the
4-digit display. The controller automatically deactivates the
password after 5 minutes without activity (i.e. no buttons
pressed) or after powering up.
SUB-MENU USER CONFIGURATION
ITEM
USER 1
[USER1]
USER 2
[USER2]*
DATE
[dAtE]*
0
Return to previous menu
Return to previous
menu*
1
Circuit selection
2
SCHEDULE 2
HOLIDAYS
[ScHEduLE 2 MEnu]* [HOLidAy MEnu]*
BROADCAST
[BrodCASt]*
Return to previous Return to previous menu
menu
Return to previous
menu
Return to previous menu
Return to previous menu
Periodic pump startup*
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
3
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
4
Start-up delay*
Night mode - demand
limit in %
Year*
SUB-MENU:
Period 4 [PErIod 4]
SUB-MENU:
Period 4 [PErIod 4]
SUB-MENU:
Holidays 4 [HOLidAy 4]
Outdoor temperature
broadcast element
5
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
6
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
7
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
8
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
9
Voltage corresponding to
100% of demand limit
-
-
-
-
SUB-MENU:
Holidays 9 [HOLidAy 9]
End month daylight saving
time
10
Voltage corresponding to
0% of demand limit
-
-
-
-
SUB-MENU:
Holidays 10 [HOLidAy 10]
End day daylight saving
time
11
Extended display
selection
-
-
-
-
SUB-MENU:
Holidays 11 [HOLidAy 11]
End hour daylight saving
time
12
Password for all user
configurations
-
-
-
-
SUB-MENU:
Holidays 12 [HOLidAy 12]
Minutes to subtract
13
Software version number
-
-
-
-
SUB-MENU:
Holidays 13 [HOLidAy 13]
-
14
-
-
-
-
-
SUB-MENU:
Holidays 14 [HOLidAy 14]
-
15
-
-
-
-
-
SUB-MENU:
Holidays 15 [HOLidAy 15]
-
16
-
-
-
-
-
SUB-MENU:
Holidays 16 [HOLidAy 16]
-
Legend:
*: only displayed if configuration requires.
20
SCHEDULE 1
[ScHEduLE 1MEnu]*
CONFIGURATION
USER
[USEr]
USER1
[USEr 1]
USER2
[USEr 2]
SCHEDULE 1
[SCHEduLE 1]*
SCHEDULE 2
[SCHEduLE 2]*
HOLIDAYS
[HOLIDAYS]*
PERIOD 1
PERIOD 1
HOLIDAY 1
PERIOD 2
PERIOD 2
HOLIDAY 2
PERIOD 3
PERIOD 3
HOLIDAY 3
PERIOD 4
PERIOD 4
HOLIDAY 4
PERIOD 5
PERIOD 5
HOLIDAY 5
PERIOD 6
PERIOD 6
HOLIDAY 6
PERIOD 7
PERIOD 7
HOLIDAY 7
PERIOD 8
PERIOD 8
HOLIDAY 8
HOUR + DATE
[dAtE]*
BROADCAST
[broAdCASE]*
...
...
...
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]*
0
Return to previous menu
0
Return to previous menu
1
Start of occupied period
1
Start month holidays
2
End of occupied period
3
Start day holidays
3
Selection Monday
4
Number of days, holidays
4
Selection Tuesday
5
Selection Wednesday
6
Selection Thursday
7
Selection Friday
8
Selection Saturday
9
Selection Sunday
10
Selection holidays
Legend
*: only displayed if configuration requires.
NOTE: The items in brackets show what is displayed on the
user interface.
21
4.5.7.3 - Description of the User 1 Configuration sub-menu
USER 1 CONFIGURATION SUB-MENU [2]
ITEM
FORMAT
UNITS
DEFAULT
COMMENTS
0
USEr MEnu
-
-
When selected this item authorises return to the previous menu.
1 [1]
0/1/2
0
Lead circuit selection
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]
0/1
-
0
Circuit capacity increase sequence
0 = equal charge for both circuits
1 = priority charge on one circuit
3 [1]
YES/no
-
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.
4
1 to 15
min
1
Delay at start-up. This value is reinitialised after power-up or when both circuits are halted by local, remote
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.
5
0/1/2/3/4
-
0
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
hours
48
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.
7
0/1/2/3
-
0
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
8
0/1/2
-
0
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]
0 to 10
Volts
0
Voltage corresponding to 100% of the demand limit
10 [1]
0 to 10
Volts
0
Voltage corresponding to 0% of the demand limit
11
«YES/no»
-
yes
Extended menu select
Yes = menu description available
No = menu description not available
This item authorises activating or inhibiting the menu item expanded display.
12
«YES/no»
-
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.
13
nn.n
-
-
Software version number
This item shows the number of the software version used by this controller. Access is read only.
Legend
1 This item shall be masked when not used.
2 Access to menu is read/write.
22
4.5.7.4 - Description of the User 2 Configuration sub-menu
USER 1 CONFIGURATION SUB-MENU
ITEM
FORMAT
0
USEr 2 Menu
UNITS
DEFAULT
1[1]
2 [1]
YES/no
-
no
n1n2n3 n4
00:00 to 23:59
-
00:00
n1n2n3 n4
00:00 to 23:59
-
00:00
4 [1]
0 to 100
%
-
Night mode demand limit value.
Authorises configuration of the maximum capacity authorised during the night mode.
5 [1]
0 or 65 to 99
-
0
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
-
0
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
-
1
CCN element address.
No two network elements can have the same element number and bus number at the same time.
8 [1]
0 to 239
-
0
CCN bus number.
No two network elements can have the same element number and bus number at the same time.
3 [1]
COMMENTS
When selected this item authorises return to the previous menu.
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.
Night control mode - start time*
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.
Night control mode - end time*
Authorises entering the time of day at which the night control mode ends.
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 submenu
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
0
dAtE MEnu
When selected this item authorises return to the
previous menu.
1
n1n2n3n4
00:00 to 23:59
Current time setting.
n1n2: hours (00 to 23). The first time the Enter button is
continuously pressed, the first two characters in the 4digit display flash so that hours can be adjusted.
n3n4: minutes (00 to 59). Continuous pressing of the
Enter key again causes the last two characters to flash
and minutes can be adjusted.
2
«Mo»
«tU»
«uE»
«tH»
«Fr»
«SA»
«Su»
3
4
n1n2n3n4
01:01 to 31:12
nnnn
Current day of week setting.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Current day and month setting.
n1n2:day (01 to 31). The first time the Enter button is
continuously pressed, the first two characters in the 4digit 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.
Current year setting.
The first timer program (schedule #1) provides a means to
automatically switch the unit from an occupied mode to an
unoccupied mode: the unit is started during occupied periods.
The second timer program (schedule #2) provides a means to
automatically switch (when auto mode is selected) the active
setpoint from an occupied setpoint to an unoccupied setpoint.
Cooling or heating setpoint 1 is used during occupied periods.
Cooling setpoint 2 is used during unoccupied periods. For
additional information on setpoint activation see section 5.7.1.
Each schedule consists of eight time periods set by the
operator. These time periods can be flagged to be in effect or
not in effect on each day of the week plus a holiday period (see
section 4.5.7.7 on public holidays). The day begins at 00.00
hours and ends at 24.00 hours.
Program is in unoccupied mode unless a schedule time period is
in effect. If two periods overlap and are both active on the same
day, the occupied mode takes priority over the unoccupied period.
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.
23
PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 8)
4.5.7.7 - Description of the Holidays sub-menus
This function is used to define 16 public holiday periods. Each
period is defined with the aid of three parameters: the month,
starting day and duration of the public holiday period. During
these public holidays the controller will be in occupied or
unoccupied mode, depending on the programmed periods
validated for public holidays (see section 4.5.7.8).
ITEM #
FORMAT
COMMENTS
0
Period X Menu
Indicates the period (X) you are going to
configure. When selected this item authorises a
return to the main menu.
1
n1n2n3n4
00:00 to 24:00
Occupied period - Start time*.
Authorises entering the time of day at which the
occupied period starts.
2
n1n2n3n4
00:00 to 24:00
Occupied period - End time*.
Authorises entering the time of day at which the
occupied period ends.
3
Mo- 0 or Mo- 1
1 = the period is in effect on Monday.
0 = period not in effect on Monday
4
tu- 0 or tu- 1
1 = the period is in effect on Tuesday.
0 = period not in effect on Tuesday.
5
UE-0 or UE- 1
1 = the period is in effect on Wednesday.
6
tH- 0 or tH- 1
1 = the period is in effect on Thursday.
0 = period not in effect on Thursday.
7
Fr-0 or Fr- 1
1 = the period is in effect on Friday.
0 = period not in effect on Friday.
ITEM #
FORMAT
COMMENTS
8
SA- 0 or SA- 1
1 = the period is in effect on Saturday.
0 = period not in effect on Saturday.
0
HoLidAy X Sub-menu
When selected this item authorises a return
to the configuration menu.
9
Su- 0 or Su- 1
1 = the period is in effect on Sunday.
0 = period not in effect on Sunday.
1
0 to 12
10
Ho- 0 or Ho- 1
1 = the period is in effect on public holidays.
0 = period not in effect on public holidays.
Start month of public holiday period
0 = period not in use
1 = January, 2 = February, etc.
2
0 to 31
Start day of public holiday period. 0 period
not in use.
3
0 to 99 days
Duration of the public holiday period in
days.
0 = period not in effect on Wednesday.
Legend
*
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.
Typical timer program:
Time
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
MON TUE WES THU
SAT SUN HOL
ATTENTION: The broadcast function must be activated to
utilise the holiday schedule, even if the unit is running in
stand-alone mode (not connected to CCN). See section
4.5.7.6.
HOLIDAY PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 16)
NOTE: Typical programming for public holidays:
- A public holiday period lasting 1 day on 20th May, for
instance, is configured as follows: start month = 5, start
day = 20, duration = 1
- A public holiday period lasting 2 day on 25th May, for
instance, is configured as follows: start month = 5, start
day = 25, duration = 2
P1
P1
P1
P2
P2
P3
P4
P4
P5
P2
P2
P3
P4
P4
P5
P2
P2
P3
P4
P4
P5
P2
P2
P3
P4
P4
P5
P2
P2
P3
P4
P4
P5
P2
P2
P3
P4
P4
P2
P2
P3
P4
P4
P2
P2
P3
P4
P4
P2
P2
P3
P4
P4
P2
P2
P3
P4
P4
P2
P2
P3
P1: period 1,
P2: period 2,
P3: period 3,
P4: period 4,
P5: period 5,
P6: period 6,
P7: period 7,
P8: period 8,
24
FRI
Each of these public holiday periods can be displayed and
changed with the aid of a sub-menu.
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.
P3
P3
P3
P6
MON :
TUE :
WED :
THU :
FRI :
SAT :
SUN :
HOL :
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Public holidays
Occupied
Unoccupied
Starts at
Ends at
0h00,
3h00,
7h00,
18h00,
7h00,
21h00,
7h00,
17h00,
7h00,
12h00,
20h00,
21h00,
Not used in this example
Not used in this example
Active on
Monday
Monday and Tuesday
Wednesday
Thursday and Friday
Saturday
Public holidays
This menu also authorises setting the date to begin and end
daylight saving time. There should be only one broadcaster in a
CCN, so this table should not be configured if any other system
element is acting as broadcaster.
ATTENTION: If the unit operates in standalone mode (not
CCN connected) this menu must be used if the holiday function
is used, or to correct for daylight saving time.
BROADCAST CONFIGURATION SUB-MENU
ITEM #
FORMAT
0
broAdCASt MEnu
COMMENTS
When selected this item authorises a return to the main menu.
1
YES/no
Determines whether or not the unit is a broadcast acknowledger when the unit is connected on a CCN network. There must be
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.
2
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.
3
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.
4
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.
5
nn
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.
6
nn
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.
7
n1n2n3n4
00:00 to 24:00
Authorises entering the hours and minutes for saving start. In this mode you enter the time of day when the broadcaster will
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.
8
nnnn
1 to 1440 minutes
Daylight saving start minutes to add: number of minutes by which the broadcaster will adjust its time for the start of daylight
saving time.
9
nn
1 to 12
Daylight saving stop month. In this mode you enter the month in which the broadcaster will adjust its time for the end of
daylight saving time.
10
nn
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.
11
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.
12
nnnn
1 to 1440 minutes
Daylight saving start minutes to subtract: number of minutes by which the broadcaster will adjust its time for the end 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.
4.5.8 - Description of the Alarms menu
This menu is used to display and reset up to 5 active alarms. It
also permits alarm reset. If no alarm is active this menu is not
accessible. See section 6 for a complete description of the
alarm codes and alarm reset.
ALARMS MENU
ITEM #
FORMAT
DESCRIPTION
0 [1]
X ALArM
rESEt ALArM
X alarms are active
Reset of alarms is requested
To reset all active alarms, continuously press the Enter
key. ‘rESET ALArM’ is then displayed. Press the select
key again: all alarms are reset.
1 [1]
nn
Current alarm code 1*
2 [1]
nn
Current alarm code 2*
3 [1]
nn
Current alarm code 3*
4 [1]
nn
Current alarm code 4*
5 [1]
nn
Current alarm code 5*
Legend
1 This item is masked when nil
*
Pressing the Enter key when alarm code is displayed causes the following
message to be scrolled:
“time of alarm” “date of alarm” “full CCN alarm message”
- “time of alarm”: hh-mm
- “date”: dd-mm
- “full CCN alarm message”: up to 64 characters
4.5.9 - Description of the Alarms History menu
ALARMS HISTORY MENU
ITEM #
FORMAT
COMMENTS
1 [1]
nn
Alarm history code 1*
2 [1]
nn
Alarm history code 2*
3 [1]
nn
Alarm history code 3*
4 [1]
nn
Alarm history code 4*
5 [1]
nn
Alarm history code 5*
6 [1]
nn
Alarm history code 6*
7 [1]
nn
Alarm history code 7*
8 [1]
nn
Alarm history code 8*
9 [1]
nn
Alarm history code 9*
10 [1]
nn
Alarm history code 10*
Legend
1 This item is masked when nil
*
Pressing the Enter key when alarm code is displayed causes the following
message to be scrolled:
“time of alarm” “date of alarm” “full CCN alarm message”
- “time of alarm”: hh-mm
- “date”: dd-mm
- “full CCN alarm message”: up to 64 characters
25
4.5.10 - Runtime menu description
4.5.10.2 - Description of the Runtimes 2 menu
RUNTIMES MENU [2]
RUNTIMES
iTEM # FORMAT
UNIT
COMMENTS
0
-
-
When selected this item
authorises return to the previous
menu
1
nnnn | M 10 | M100
hrs/10 or 100
Pump #1 operating hours*
2
nnnn | M 10 | M100
hrs/10 or 100
Pump #2 operating hours*
3 [1]
nnnn | M 10 | M100
hrs/10 or 100
NOTE: The items in brackets show what is displayed on the
user interface.
Condenser pump operating
hours
4 [1]
nnnn
-
Number of start-ups for the
compressor with the highest
number during the last hour
4.5.10.1 - Description of the Runtimes 1 menu
5
nnnn
-
Average number of compressor
start-ups/hour for the last 24
hours
RUNTIMES 1
[runtiMES 1]
RUNTIMES 2
[runtiMES 2]
MAINTENANCE
[MAintEnAnCE]
RUNTIMES MENU [1]
iTEM # FORMAT
UNIT
COMMENTS
0
-
When selected this item
authorises return to the previous
menu
-
4.5.10.3 - Maintenance menu description
To be active, the maintenance function must be preset in the
Service configuration.
1
nnnn | M 10 | M100
hrs/10 or 100
Unit operating hours*
2
nnnn | M 10 | M100
hrs/10 or 100
Compressor A1 operating hours*
3 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor A2 operating hours*
4 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor A3 operating hours*
5 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor A4 operating hours*
6 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor B1 operating hours*
1 [1]
Accessible with the Service password.
7 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor B2 operating hours*
2 [1]
For future use
8 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor B3 operating hours*
3 [1]
9 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor B4 operating hours*
4 [1]
ALErt
Water loop rate to low
10
nnnn | M 10 | M100
-/10 or 100
Machine starts*
5 [1]
nnn/ALErt
11
nnnn | M 10 | M100
-/10 or 100
Compressor A1 starts*
12 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor A2 starts*
Next primary pump maintenance operation in nnn
days. 'ALErt' is displayed, when the delay before
maintenance has elapsed.
13 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor A3 starts*
6 [1]
nnn/ALErt
14 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor A4 starts*
Next secondary pump maintenance operation in
nnn days. 'ALErt' is displayed, when the delay
before maintenance has elapsed.
15 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B1 starts*
7 [1]
nnn/ALErt
16 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B2 starts*
17 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B3 starts*
Next water filter maintenance operation in nnn
days. 'ALErt' is displayed, when the delay before
maintenance has elapsed.
18 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B4 starts*
NOTES
1 This item is masked when not used
*
Certain values are divided by 10 or by 100, so that number of hours or startups 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”.
26
ITEM # FORMAT
0
DESCRIPTION
MAintEnAnCE MEnu When selected this item authorises return to the
previous menu.
For future use
Legend
1 This item is masked when not used.
5 - PRO-DIALOG PLUS CONTROL OPERATION
-
Start/Stop schedule: occupied or unoccupied status of the
unit as determined by the chiller start/stop program
(Schedule #1). Used when the unit is equipped with an
optional CCN/clock board, otherwise the chiller occupied
mode is forced to occupied all the time.
Master control type. This parameter is used when the
unit is the master unit in a two chiller lead/lag arrangement. The master control type determines whether the unit
is to be controlled locally, remotely or through CCN (this
parameter is a Service configuration).
CCN emergency shutdown: if this CCN command is
activated, it shuts the unit down whatever the active
operating type.
General alarm: the unit is totally stopped due to failure.
5.1 - Start/stop control
The table below summarises the unit control type and stop or
go status with regard to the following parameters.
Operating type: this is selected using the start/stop button
on the front of the user interface.
Remote start/stop contacts: these contacts are used when
the unit is in remote operating type (rEM). See sections
3.6.2 and 3.6.3.
CHIL_S_S: this network command relates to the chiller
start/stop when the unit is in CCN control (CCn). Variable forced to disable: the unit is halted. Variable forced to
Enable: the unit runs in accordance with schedule 1.
-
-
-
ACTIVE OPERATING TYPE
STATUS OF PARAMETERS
L-SC
rEM
CCN
MASt
CHIL_S_S
MASTER
CONTROL
TYPE
START/STOP CCN
SCHEDULE EMERGENCY
MODE
SHUTDOWN
GENERAL
ALARM
LOFF L-ON
REMOTE
START/STOP
CONTACT
-
-
-
-
-
-
-
-
-
-
Enable
-
-
-
-
-
-
-
-
-
-
-.
-.
-
Yes
-
Off
Active -
-
-
-
-
-
-
-
-
-
-
Local
Off
-
-
Active -
-
-
-
-
-
Unoccupied
-
-
Local
Off
-
-
-
Active -
-
-
Off
-
-
-
-
Remote
Off
-
-
-
Active -
-
-
-
-
Unoccupied
-
-
Remote
Off
-
-
-
-
Active -
Disable
-
-
-
-
-
CCN
Off
-
-
-
-
Active -
-
-
-
Unoccupied
-
-
CCN
Off
-
-
-
-
-
Active -
-
Local
Unoccupied
-
-
Local
Off
-
-
-
-
-
Active -
Off
Remote
-
-
-
Remote
Off
-
-
-
-
-
Active -
-
Remote
Unoccupied
-
-
Remote
Off
-
-
-
-
-
Active Disable
-
CCN
-
-
-
CCN
Off
-
-
-
-
-
Active -
-
CCN
Unoccupied
-
-
CCN
Off
-
Active -
-
-
-
-
-
-
-
Disable
No
Local
On
-
-
Active -
-
-
-
-
-
Occupied
Disable
No
Local
On
-
-
-
Active -
-
-
On
-
Occupied
Dsable
No
Remote
On
Enable
CONTROL UNIT
TYPE
MODE
Off
-
-
-
-
Active -
-
-
Occupied
Disable
No
CCN
On
-
-
-
-
-
Active -
-
Local
Occupied
Disable
No
Local
On
-
-
-
-
-
Active -
On
Remote
Occupied
Disable
No
Remote
On
-
-
-
-
-
Active Enable
-
CCN
Occupied
Disable
No
CCN
On
5.2 - Heating/cooling selection
On heat pumps, heating/cooling selection can be controlled
differently depending on the active operating type:
•
Locally on the unit, using operating types L-C1, L-C2,
LC1r and LC2r (for cooling) and L-H (for heating).
•
Remotely using the heat/cool selection volt-free contact
when the unit is in Remote operating type (rEM).
•
Via a CCN command when the unit is in CCN operating
type (CCn).
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.
PARAMETER STATUS
ON/OFF
STATUS
CONTROL TYPE
HEATING/COOLING
SELECTION IN LOCAL MODE
REMOTE HEATING/
COOLING CONTACTS
HC_SEL
OPERATING MODE
Off
-
-
-
-
Cooling
On
Local
Cooling
-
-
Cooling
On
Local
Heating
-
-
Heating
On
Remote
-
Cooling mode
-
Cooling
On
Remote
-
Heating mode
-
Heating
On
CCN
-
-
Cooling
Cooling
On
CCN
-
-
Heating
Heating
27
5.3 - Evaporator water pump control
5.5 - Control interlock contact
The unit can control one or two evaporator water pumps. The
evaporator water pump is turned on when this option is configured (see User configuration) and when the unit is in one of the
on modes described above or in delay mode. Since the minimum
value for the delay at start-up is 1 minute (configurable between 1
and 15 minutes), the pump will run for at least one minute
before the first compressor starts.
This contact can control the status of the water loop. Its
function is to prevent unit start-up, if it is open and if the startup delay has passed. Furthermore, this contact must remain
closed when the unit is not in local off, remote or CCN control
mode. Opening this contact for more than 8 seconds while the
unit is operating, will cause immediate shut-down of the faulty
unit.
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 pump can be started in particular operating conditions when
the evaporator heater is active. See section 5.19 for the
particular evaporator pump control for the follower unit
(master/slave assembly). If two pumps are controlled and the
reversing function has been selected (see User 1 configuration),
the control tries to limit the pump run time delta to the
configured pump change-over delay. If this delay has elapsed,
the pump reversing function is activated, when the unit is
running. During the reversing function both pumps run together
for two seconds. If a pump has failed and a secondary pump is
available, the unit is stopped and started again with this pump.
The control provides a means to automatically start the pump
each day at 14.00 hours for 2 seconds when the unit is off. If
the unit is fitted with two pumps, the first pump is started on
odd days and the second pump is started on even days. Starting
the pump periodically for few seconds increases the life-time
of the pump bearings and the tightness of the pump seal.
NOTE: If this function is used, there should not be any
chilled water pump interlock between terminals 34 and 35
(see section 3.4).
5.4 - Condenser water pump control
Only available on water-cooled units and air-cooled units with
heat reclaim.
The condenser pump can be controlled by two modes, depending on the configuration (only accessible by Carrier Service).
1 - Control based on unit start/stop control. In this case it is
controlled in the same way as the evaporator pump.
2 - Control based on compressor status. In this case the pump
is activated at the same time as the first compressor. It
only switches off when no compressor is activated.
The evaporator heater can be activated to protect an evaporator
that may be damaged by ice, if the unit is shut down for a long
period at low outdoor air temperature. If the heater is not
sufficient to increase the water temperature, the evaporator
pump can be started.
NOTE: The evaporator heater control parameters may be
modified using the Service Configuration menu.
5.7 - Control point
Control point represents the leaving water temperature that the
unit must produce.
•
In cooling mode: control point = active setpoint + reset
•
In heating mode: control point = active setpoint - reset
5.7.1 - Active setpoint
Two setpoints can be selected as active in cooling mode.
Usually, the second setpoint is used for unoccupied periods or
for ice storage (medium or low brine unit). A single setpoint is
available in heating mode.
Depending on the current operating mode, the active setpoint
can be selected with the operating type selector button, or with
the user’s volt-free contacts, or with network commands (see
section 3.4).
5.7.2 - Reset
Reset means that the active setpoint is modified so that less
machine capacity is required (in cooling mode, the setpoint is
increased, in heating mode it is decreased). This modification is
in general a reaction to a drop in the load. For the Pro-Dialog
Plus control system, the source of the reset can be configured
in the User 1 configuration: it can be based on an external 0-10 V
signal, provided either by the outdoor temperature (that gives a
measure of the load trends for the building) or by the return
water temperature (delta T that gives an average building load).
In response to a drop in the outdoor temperature or to a drop in
delta T, the cooling setpoint is normally reset upwards in order
to optimise unit performance:
In both cases the reset parameters, i.e. slope, source and maximum value, are configurable in the Setpoints menu (see section
4.5.4). Reset is a linear function based on three parameters.
•
A reference at which reset is zero (outdoor temperature or
delta T - no reset value).
•
A reference at which reset is maximum (outdoor
temperature or delta T - full reset value).
•
The maximum reset value.
28
5.8 - Demand limit
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:
•
By reference to a limiting signal from a user-controlled
volt-free contact: the capacity of the unit cannot exceed
the demand limit setpoint (which can be modified in the
Setpoints menu) when the limit contact is closed.
•
By reference to an external 0-10 V d.c. signal: the
capacity of the unit cannot exceed the demand limit
imposed by this external signal. It is a linear function and
its para-meters are configurable in the User1 menu
(voltages at 0% limitation and 100% of limitation). This
function is not available if Reset by reference to an
external 0-10 V d.c. signal has already been selected.
Whatever the method used, demand limit is active in all
operating types: Local, Remote or CCN. However, in
Local operating type, demand limit can be disabled with
keypad commands (see section 4.3.3) and in CCN
operating type, demand limit can be controlled directly
with the aid of CCN commands.
NOTE: A limitation value of 100% means that the unit may
call upon the full array of its capacity stages.
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.
5.10 - Determining the lead circuit
This function commands the start/stop sequence of the two
refrigerant circuits called A and B. The circuit authorised to
start first is the lead circuit. Three methods can be configured
by the user in the Configuration menu:
•
Auto mode: the control system determines the lead circuit
so as to equalise the number of starts on each circuit
(value weighted by the operating times of each circuit).
Thus, the circuit with the least number of starts is always
given precedence to start. The lead circuit is stopped last.
This function is only available in two-circuit units.
NOTE: If one circuit has more unloaders than the other, this
circuit is always the lead circuit, independent of the
configuration and the operating hours of the two circuits.
•
•
Circuit A as leader: Circuit A is always the lead circuit.
It is the first to start and the last to stop.
Circuit B as leader: Circuit B is always the lead circuit.
It is the first to start and the last to stop. This choice is
only available in two-circuit units.
5.11 - Circuit loading sequence
Here is an example of demand limit by an external 0-10 V d.c.
signal. This example assumes that the limitation parameters are
such that at 0 volt the authorised capacity shall be maximum
capacity, and at 10 volts the authorised capacity shall be zero
(this is the default configuration).
Demand limit by 0-10 V d.c. signal
Maximum permitted
capacity
No demand limit
Total demand limit
0-10 V dc demand limit
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.
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.
5.9 - Capacity control
This function activates the compressors and capacity unloaders
to keep the entering or leaving water temperature at its
setpoint. The precision with which this is achieved depends on
the capacity of the water loop, the flow rate, the load, and
the number of stages available on the unit.
The control system continuously takes account of the temperature error with respect to the setpoint, as well as the rate of
change in this error and the difference between entering and
leaving water temperatures, in order to determine the optimum
moment at which to add or withdraw a capacity stage.
29
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 condenser water valves (optional):
• Controlling head pressure by reference to a setpoint:
Saturated head pressure is controlled by reference to a userdefinable fixed setpoint. This temperature is maintained by
using the valves to control the flow of water in each condenser circuit.
• Controlling head pressure by reference to the position of
the EXV: Saturated head pressure is controlled by reference
to the position of the EXV and the superheat, by adjusting
the flow of water in each condenser circuit. The valve control
system seeks to keep the EXVs as wide open as possible
whilst maintaining the correct level of superheat. When the
second head pressure setpoint is selected (reclaim setting),
the control system will automatically revert to controlling by
reference to a setpoint even if control by reference to the
EXV has been selected. The original configuration is
reinitialised when the first head pressure setpoint is reselected.
5.13 - Controlling the EXV
EXVs, if used, control the flow of refrigerant in the evaporator.
They are controlled in order to maintain a constant level of
superheat at the thermistor for the lead compressor inlet gas
(located between the compressor motor and the cylinders).
A thermistor and a pressure sensor, in the lead compressor of
each circuit, are used to measure this superheat. The thermistor
measures the temperature of the superheated gas entering the
cylinders. The pressure sensor measures the suction gas
pressure. The controller converts this value into a saturated
temperature. The difference between the superheated gas
temperature and the saturated temperature is the superheat. The
control system sets the position of the EXV to hold this
superheat at the setpoint configured for the unit.
Since the EXVs are driven by the controller their positions are
always known. During start-up of a circuit its EXV is fully closed
to ensure pump down. After pump down, the system continuously
controls and monitors the valve position. Similarly, on shutdown
of a circuit the EXV is closed again to ensure pumping down.
EXVs are also used to restrict suction temperature, making it
possible to start the unit at higher water and suction temperatures without overloading the compressors. This procedure
controls what is known as Maximum Operating Pressure (MOP).
5.14 - Head pressure control on air-cooled units
There are two methods, configurable only by Carrier Service,
for controlling the condenser fans:
• Controlling condensation by reference to a setpoint
(default): The saturated head pressure is controlled by
reference to a fixed setpoint (user-definable in the Setpoints
menu). This temperature is maintained by cycling fans on
and off, as well as by varying the speed of a fan in
appropriate cases.
• Controlling condensation by reference to the position of
the EXV: The saturated head pressure is controlled by
reference to the position of the EXV and the superheat, by
cycling fans on and off as well as by varying the speed of a
fan in appropriate cases. The control system seeks to keep
the EXVs as wide open as possible whilst maintaining the
correct level of superheat with the fans. When the second
condensing setpoint is selected (reclaim setting), the control
system will automatically revert to controlling by reference
to a setpoint even if control by reference to the EXV has
been selected. The original configuration is reinitialised
when the first condensing setpoint is re-selected.
NOTE
Certain units can have up to 8 fan stages, of which one per
circuit is a variable-speed fan, depending on their configuration and wiring.
30
5.16 - Active setpoint selection
Two setpoints can be selected as active in cooling mode, and
one setpoint in heating mode. Usually, the second cooling
setpoint is used for unoccupied periods or for ice storage (brine
unit). Depending on the current operating mode, the active
setpoint can be selected either by choosing the item in the
Information menu. or with the user volt-free contacts, or with
network commands, or by the setpoint time schedule program
(Schedule 2).
The following tables show a summary of the possible selctions
as a function of the control typpes (local, remote or network),
and the parameters below:
•
Local setpoint selection: item No. 11 of the Information
Menu permits selection of the active setpoint, if the unit is
in the local operating type.
•
Heating/cooling operating mode.
•
Control contacts: status of the remote heating and
cooling control contact. This contact is only active, if the
unit is under remote operating control. See section 3.6.6.
•
Schedule 2 program status: schedule program for
setpoint selection. See section 4.3.11.6.
LOCAL OPERATING MODE
PARAMETER STATUS
HEATING/
COOLING
OPERATING
MODE
LOCAL
SETPOINT
SELECTION
SCHEDULE 2
ACTIVE SETPOINT
PROGRAM STATUS
cooling
cooling
heating
holidays
holidays
sp 1
sp2
auto
auto
occupied
unoccupied
cooling setpoint 1
cooling setpoint 2
heating setpoint
cooling setpoint 1
cooling setpoint 2
REMOTE OPERATING MODE
PARAMETER STATUS
CONTROL
HEATING/
CONTACT
COOLING
OPOERATING
MODE
occupied
unoccupied
heating setpoint
cooling setpoint 1
cooling setpoint 2
cooling setpoint 1
cooling setpoint 2
HEATING/COOLING
OPERATING MODE
SCHEDULE 2
PROGRAM STATUS
ACTIVE SETPOINT
cooling
cooling
heating
occupied
unoccupied
-
cooling setpoint 1
cooling setpoint 2
heating setpoint
heating
cooling
cooling
-
sp 1
sp2
holidays
holidays
SCHEDULE 2
ACTIVE SETPOINT
PROGRAM STATUS
CCN OPERATING MODE
PARAMETER STATUS
5.17 - High pressure load shedding function
This function does not require an additional board. It prevents
high pressure a break on a circuit by the following means:
•
Preventing any capacity increase on the circuit once the
high pressure value has reached an initial threshold.
•
Shedding one or more capacity stages once a second
protection threshold has been reached.
In the event of capacity stages being shed, no capacity increase
will be authorised on the circuit concerned for a period of 5
minutes.
5.18 - Pumping down
When the lead compressor in each circuit is started or stopped,
that circuit goes through a pumping down cycle to purge the
evaporator and suction line of refrigerant. The maximum
duration of this cycle is 3 minutes.
All control commands to the master/slave assembly (start/stop,
setpoint, heating/cooling operation, load shedding, etc.) are
handled by the unit which is configured as the master, and must
therefore only be applied to the master unit. They will be transmitted automatically to the slave unit. The master unit can be
controlled locally, remotely or by CCN commands. Therefore
to start up the assembly, simply validate the Master operating
type (MASt) on the master unit. If the Master has been configured for remote control then use the remote volt-free contacts
for unit start/stop. The slave unit must stay in CCN operating
type continuously. To stop the master/slave assembly, select
Local Off (LOFF) on the master unit or use the remote voltfree contacts if the unit has been configured for remote control.
One of the functions of the master unit (depending on its configuration) may be the designation, whether the master or slave is
to be the lead machine or the follower. The roles of lead machine
and follower will be reversed when the difference in running
hours between the two units exceeds a configurable value,
ensuring that the running times of the two units are automatically
equalised. The changeover between lead machine and follower
may take place when the assembly is started up, or even whilst
running. The running time balancing function is not active if it
has not been configured: in this case the lead machine is
always the master unit.
The lead machine will always be started first. When the lead
machine is at its full available capacity, start-up delay (configurable) is initialised on the follower. When this delay has
expired, and if the error on the control point is greater than 1.7°C,
the follower unit is authorised to start and the pump is activated.
The follower will automatically use the master unit active setpoint. The lead machine will be held at its full available capacity for as long as the active capacity on the follower is not
zero. When the follower unit receives a command to stop, its
evaporator water pump is turned off with 20 seconds delay.
In the event of a communication fault between the two units,
each shall return to an autonomous operating mode until the
fault is cleared. If the master unit is halted due to an alarm, the
slave unit is authorised to start without prior conditions.
5.20 - Controlling Pro-Dialog Plus units with a System
Manager
5.19 - Master/slave assembly
Two PRO-DIALOG Plus units can be linked to produce a master/
slave assembly. The two machines are interconnected over the
CCN bus. All parameters required for the master/slave function
must be configured through the Service configuration menu.
Up to eight PRO-DIALOG Plus units (or System Manager
compatible units) can be controlled by one control module of
the FSM or CSM III type which can handle multi-tasking of
control functions such as starting units in sequence.
Master/slave operation requires the connection of a temperature
probe at the common manifold on each machine, if the heat
exchanger leaving water temperature is controlled.
The master/slave assembly can operate with constant or variable
flow. In the case of variable flow each machine must control its
own water pump and automatically shut down the pump, if the
cooling capacity is zero. For constant flow operation the pumps
for each unit are continuously operating, if the system is operating. The master unit can control a common pump that will be
activated, when the system is started. In this case the slave unit
pump is not used.
31
5.21 - Optional heat reclaim module
6 - DIAGNOSTICS - TROUBLESHOOTING
Change-over procedure from cooling mode to heat reclaim
mode:
•
Start-up of the condenser pump
•
Verification of the condenser flow switch control contact.
If this remains open after one minute of condenser pump
operation, the circuit remains in cooling mode and alarm
79 for circuit A (alarm 80 for circuit B) will be activated.
•
As soon as the saturated condensing temperature reaches
30°C, the pumpdown sequence is activated.
•
Pumpdown: closing of the cooling mode coil shutoff valve.
Opening of the drain valve, closing of the EXV valve.
•
When the pumpdown pressure reaches the end of the
pumpdown threshold, the pumpdown valve is closed and
the heat reclaim function is effective.
6.1 - General
The PRO-DIALOG Plus control system has many fault tracing
aid functions. The local interface and its various menus give
access to all unit operating conditions. The test function makes
it possible to run a quick test of all devices on the unit. If an
operating fault is detected, an alarm is activated and an alarm
code is stored in the Alarm menu.
6.2 - Displaying alarms
The alarm LEDs on the summary interface (see section 4.1)
give a quick display of the status of each circuit and the unit as
a whole.
•
A flashing LED shows that the circuit is operating but
there is an alarm.
•
A steady LED shows that the circuit has been shut down
due to a fault.
The Alarm menu on the main interface displays up to 5 fault
codes that are active on the unit.
6.3 - Resetting alarms
When the cause of the alarm has been corrected the alarm can
be reset, depending on the type, either automatically on return
to normal, or manually when action has been taken on the unit.
Alarms can be reset even if the unit is running.
This means that an alarm can be reset without stopping the
machine. In the event of a power supply interrupt, the unit
restarts automatically without the need for an external command. However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or a
unit from restarting.
A manual reset must be run from the main interface using the
following procedure:
RESET OF ACTIVE ALARMS
OPERATION
Hold down the MENU
button until the LED
for alarms lights. The
4-digit display shows
the number of active
alarms (2 in this
example).
32
ITEM NUMBER
ITEM VALUE
PRESS MENU
2-DIGIT DISPLAY 4-DIGIT DISPLAY BUTTON LED
0
0
2 ALArM
Press the Enter button 0
until "rESEt ALARrM"
is shown in the 4-digit
display.
rESEt ALArM
Press the Enter button 0
again to validate the
reset. "Good" is displayed for 2 seconds
then, "2 ALArM" and
then, "no ALArM".
Good
then, 2 AL
then, no ALArM
6.4 - Alarm codes
The following list gives a complete description of each alarm
code and its possible cause.
ALARM CODE DESCRIPTIONS
Code
Alarm name
Description
Action
Pumpdown
Reset type
Probable cause
1
Evaporator leaving water thermistor fault
Thermistor outside range
Unit shut down
Yes
Auto
Thermistor or wiring fault or
bad connection
2
Evaporator entering water thermistor fault
Ditto
Unit shut down
Yes
Auto
Ditto
3
Condenser leaving water thermistor fault
Ditto
Heating mode: Unit shut down,
if control on leaving water.
Cooling mode: no action
Yes
Auto
Ditto
4
Condenser entering water thermistor fault
Ditto
Heating mode: Unit shut down,
if control on entering water.
Cooling mode: no action
-
Auto
Ditto
5
Heat reclaim entering water thermistor fault
Ditto
Unit with heat recalaim option:
heat reclaim mode shut down,
unit changes over to standard
cooling mode. If not: no action
-
Auto
Ditto
6
Heat reclaim leaving water thermistor fault
Ditto
None
-
Auto
Ditto
7
Outdoor temperature sensor fault
Ditto
Reset: normal setpoint used.
Limitation or reset deactivated.
-
Auto, if temp. measured by sensor
returns to normal
Thermistor faulty
8
CHWS (master/slave) fluid thermistor fault
Ditto
Deactivated
-
Ditto
Themistor faulty
9
Suction thermistor fault, compressor A1
Ditto
Circuit A shut down
Yes
Auto
Ditto
10
Suction thermistor fault, compressor B1
Ditto
Circuit B shut down
Yes
Auto
Ditto
11
External 0-10 V dc signal fault
Reset signal outside range
Reset: normal setpoint used
Limitation or reset deactivated
No
Auto
Signal incorrect, wiring error
12
Discharge pressure sensor fault, circuit A
Voltage transmitted by incorrect sensor Circuit A shut down
Yes
Auto
Sensor fault or wiring error
13
Discharge pressure sensor fault, circuit B
Ditto
Yes
Auto
Ditto
14
Suction pressure sensor fault, circuit A
Ditto
Circuit A shut down
No
Auto
Ditto
15
Suction pressure sensor fault, circuit B
Ditto
Circuit B shut down
No
Auto
Ditto
16
Oil pressure sensor fault, compressor A1
Ditto
Circuit A shut down
No
Auto
Ditto
17
Oil pressure sensor fault, compressor B1
Ditto
Circuit B shut down
No
Auto
Ditto
18
Oil pressure sensor fault, compressor A2
Ditto
Compressor A2 shut down
-
Auto
Ditto
19
Oil pressure sensor fault, compressor B2
Ditto
Compressor B2 shut down
-
Auto
Ditto
20
Oil pressure sensor fault, compressor A3
Ditto
Compressor A3 shut down
-
Auto
Ditto
21
Oil pressure sensor fault, compressor B3
Ditto
Compressor B3 shut down
-
Auto
Ditto
22
Oil pressure sensor fault, compressor A4
Ditto
Compressor A4 shut down
-
Auto
Ditto
Ditto
Circuit B shut down
23
Oil pressure sensor fault, compressor B4
Ditto
Compressor B4 shut down
-
Auto
24
Pumpdown pressure sensor fault, circuit A
Ditto
If circuit is in heat reclaim
mode, it goes to cooling mode.
If not, no action
-
Auto, if press. measured by sensor
returns to normal
25
Pumpdown pressure sensor fault, circuit B
Ditto
Ditto
-
Ditto
Ditto
26
Loss of communication with compressor board A1
Communication with the compressor
board is lost
Circuit A shut down
No
Auto
Wiring fault, faulty module,
incorrect module address
27
Loss of communication with compressor board A2
Ditto
Compressor A2 shut down
No
Auto
Ditto
28
Loss of communication with compressor board A3
Ditto
Compressor A3 shut down
No
Auto
Ditto
29
Loss of communication with compressor board A4
Ditto
Compressor A4 shut down
No
Auto
Ditto
30
Loss of communication with compressor board B1
Ditto
Circuit B shut down
No
Auto
Ditto
31
Loss of communication with compressor board B2
Ditto
Compressor B2 shut down
No
Auto
Ditto
32
Loss of communication with compressor board B3
Ditto
Compressor B3 shut down
-
Auto
Ditto
33
Loss of communication with compressor board B4
Ditto
Compressor B4 shut down
-
Auto
Ditto
34
Loss of communication with EXV board
Ditto
Unit shut down
No
Auto
Wiring bus faulty, incorrect
address or board faulty
35
Loss of communication with NRCP board
The board does not respond
Unit shut down, if heat reclaim mode No
is selected
Auto, if board is
again detected
NRCP board faulty
36
Loss of communication with fan board 1
Ditto
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
37
Loss of communication with fan board 2
Ditto
Circuit B shut down
No
Auto
Ditto
38
Loss of communication with 4xAI - 2xAO board 1
Ditto
Unit shut down or no action
No
Auto
Ditto, depending on
configuration
39
Loss of communication with 4xAI - 2xAO board 2
Ditto
Compressors or circuit shut down
No
Auto
Ditto, depending on
configuration
40
Pumpdown fault, circuit A
End of pumpdown conditions not
satisfied
Circuit A shut down
No
Manual
EXV or sensor faulty
No
41
Pumpdown fault, circuit B
Ditto
Circuit B shut down
No
Manual
Ditto
42
Evaporator frost protection
Unit operating: units shut down if
temp. < defrost threshold.
Unit shut down: if temp < threshold
and evaporator heater on for more
than 10 mins.
Unit shut down
No
Auto first time,
then manual
Low water flow or
thermistor defective
Unit shut down
43
Low evaporator water flow rate.
No
Manual
Water pump faulty
44
Low suction temperature, circuit A
Circuit operating: saturated suction
Circuit A shut down
temp. < defrost threshold and < leaving
water -16°C for more than 10 mins.
No
Manual
Low charge, filter dirty
ot thermistor faulty
45
Low suction temperature, circuit B
Ditto
Circuit B shut down
No
Manual
Ditto
46
High suction overheat, circuit A
EXV fully open
Circuit A shut down
Yes
Manual
Ditto
47
High suction overheat, circuit B
Ditto
Circuit B shut down
Yes
Manual
Ditto
48
Low suction overheat, circuit A
EXV in min. position, and circuit
superheat below superheat setpoint
-5.5 K, saturated suction temp. above
MOP for 5 mins.
Circuit A shut down
Yes
Manual
EXV or thermistor or
transducer defective
33
ALARM CODE DESCRIPTIONS
34
Code
Alarm name
49
Low suction overheat, circuit B
Description
Action
Pumpdown
Reset type
Circuit B shut down
Yes
Manual
Probable cause
50
Low oil pressure, compressor A1
Ditto
Oil pressure < min. threshold
Circuit A shut down
No
Manual
Compressor, crankcase
heater, pressure sensor or
EXV faulty, refrigerant
charge too high, low oil
charge
51
52
Low oil pressure, compressor B1
Ditto
Circuit B shut down
No
Low oil pressure, compressor A2
Ditto
Compressor A2 shut down
53
Low oil pressure, compressor B2
Ditto
Compressor B2 shut down
Manual
Ditto
54
Low oil pressure, compressor A3
Ditto
Compressor A3 shut down
Manual
Ditto
55
Low oil pressure, compressor B3
Ditto
Compressor B3 shut down
Manual
Ditto
56
Low oil pressure, compressor A4
Ditto
Compressor A4 shut down
Manual
Ditto
Manual
Ditto
Manual
Ditto
57
Low oil pressure, compressor B4
Ditto
Compressor B4 shut down
Manual
Ditto
58
Evaporator water flow control fault
1. Interlock not closed before end
of start-up delay
2. Pump shut down for 2 mins
and water flow contact closed
Unit shut down.
Pump shut down
No
Manual
Evaporator water flow fault
59
Low pressure fault, circuit A
Circuit operating, and suction pressure
below permitted threshold for more
than 3 mins.
Circuit A shut down
No
Auto first time,
then manual*
Low refrigerant charge, EXV
faulty or filter dirty
60
Low pressure fault, circuit B
Ditto
Circuit B shut down
No
Ditto
Ditto
61
Repeated high pressure load sheds, circuit A
More than 6 successive capacity load
sheds in the circuit due to exceeded
high pressure
None
No
Auto
Transducer faulty, condenser
ent. air temp., evaporator ent.
water temp. too high, cond.
blocked or fan flow rate too
low
62
Repeated high pressure load sheds, circuit B
Ditto
Ditto
Ditto
Ditto
63
High pressure switch not reset or reverse compressor
rotation, circuit A
The high pressure switch has not been
reset after a high pressure cut-out,
or the lead compressor does not work
Circuit A shut down
No
Manual
The high pressure switch has
not been reset, poor electrical
connection of lead compr.
64
High pressure switch not reset or reverse compressor
rotation, circuit B
Ditto
Circuit B shut down
No
Manual
Ditto
65
Control box thermostat fault
Sensor overheat
Unit shut down
Manual
Control box poorly
ventilated
66
Loss of communication with System Manager
Units controlled by SM, and
communication with the module over
2 mins. faulty
Unit operates in autonomous mode
Auto
CCN network fault
67
Loss of communication with the master or slave
Master/slave connection interrupted
beween the two units for more than
2 mins.
Unit operates in autonomous mode
Auto
CCN network fault
68
Master/slave configuration error
Poor master/slave configuration
Master/slave control not allowed
Auto/manual in
case of heating/
cooling fault
Master/slave configuration
fault
69
Initial factory configuration necessary
All factory parameters are at zero
Unit prevented from starting
Auto
No factory configuration
70
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
Poor factory configuration
Ditto
Ditto
Factory configuration error
71
CCN/Clock Board fault
The CCN/Clock Board is no longer
detected
Unit shut down
No
Auto, if the board CCN/Clock Board faulty
is again detected
72
Emergency stop
An emergncy stop commend has been
transmitted by the CCN network.
Unit shut down
No
CCN
CCN network command
73
Pump No. 1 fault
Evaporator water pump operating
contact open, when the pump has
received a commmand to operate.
Unit shut down
No
Manual
Pump overheat or poor
pump connection
74
Pump No. 2 fault
Ditto
Unit shut down
No
Manual
Ditto
75
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
No
Auto
Discharge pressure transducer faulty, refrigerant leak,
or low cond. water temp.
Ditto
76
Condenser anti-freeze protection, circuit B
Ditto
No
Auto
Ditto
77
Lack of water flow, condenser
Water flow switch (water-cooled units) Unit shut down
not closed for 1 min.
No
Manual
Condenser pump, low water
flow, water flow switch
78
Condenser water flow fault, heat reclaim mode
Ditto
No
Manual
Ditto
79
Heat reclaim mode fault, circuit A
More than two consecutive pumpdown Circuit A stays in cooling mode
sequences not successful
No
Manual
Leak or heat reclaim or drain
solenoid shut-off valve fault
80
Heat reclaim mode fault, circuit B
Ditto
No
Manual
Ditto
81
High pressure fault, circuit A
Circuit operating and discharge pressure Unit shut down
exceeds the high pressure cut-out point
No
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
No
Ditto
Units stays in cooling mode
Circuit B stays in coolng mode
82
High pressure fault, circuit B
Ditto
Ditto
83
Maintenance alert
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
A maintenance alert is active
None
Manual
Ditto
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.
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:
DGT (only for units with low-temperature option):
The discharge gas thermostat detects and protects the
compressor against abnormally high discharge temperatures.
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.
ALARM CODE DESCRIPTIONS
Code
Alarm name
Action
Pumpdown
Reset type
Probable cause
101
DGT fault, compressor A1
Circuit A shut down
No
Manual
Hot gas thermostat contact open
102
Starter Guard fault compressor A1
Circuit A shut down
No
Ditto
Crankcase heater fault and open motor current
fault detection board contact
201
DGT fault, compressor A2
Compressor A2 shut down
Ditto
Hot gas thermostat contact open
202
Starter Guard fault compressor A 2
Compressor A2 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
301
DGT fault, compressor A3
Compressor A3 shut down
Ditto
Hot gas thermostat contact open
302
Starter Guard fault compressor A 3
Compressor A3 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
401
DGT fault, compressor A4
Compressor A4 shut down
Ditto
Hot gas thermostat contact open
402
Starter Guard fault compressor A 4
Compressor A4 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
501
DGT fault, compressor B1
Circuit B shut down
No
Ditto
Hot gas thermostat contact open
502
Starter Guard fault compressor B1
Circuit B shut down
No
Ditto
Crankcase heater fault and open motor current
fault detection board contact
601
DGT fault, compressor B2
Compressor B2 shut down
Ditto
Hot gas thermostat contact open
602
Starter Guard fault compressor B 2
Compressor B2 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
701
DGT fault, compressor B3
Compressor B3 shut down
Ditto
Hot gas thermostat contact open
702
Starter Guard fault compressor B3
Compressor B3 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
801
DGT fault, compressor B4
Compressor B4 shut down
Ditto
Hot gas thermostat contact open
802
Starter Guard fault compressor B4
Compressor B4 shut down
Ditto
Crankcase heater fault and open motor current
fault detection board contact
35
Order No. 13040-76, 05.2000. Supersedes order No.: New
Manufacturer reserves the right to change any product specifications without notice.
36
Manufactured by: Carrier S.A., Montluel, France.
Printed in the Netherlands on totally chlorine-free paper.