Ръководство за експлоатация и поддръжка

30GX and 30HXC series
PRO-DIALOG
Control
Screw-Compressor Air- and
Water-Cooled Liquid Chillers
50 Hz
GLOBAL CHILLER
Installation, operation and maintenance instructions
Contents
1 - SAFETY CONSIDERATIONS................................................................................................................................................... 3
1.1 - General........................................................................................................................................................................................ 3
1.2 - Avoiding electrocution................................................................................................................................................................ 3
2 - GENERAL DESCRIPTION........................................................................................................................................................ 3
2.1 - General......................................................................................................................................................................................... 3
2.2 - Abbreviations used...................................................................................................................................................................... 3
3 - HARDWARE DESCRIPTION.................................................................................................................................................... 4
3.1 - General......................................................................................................................................................................................... 4
3.2 - Electronic boards......................................................................................................................................................................... 4
3.3 - The controls................................................................................................................................................................................. 5
3.4 - User connections.......................................................................................................................................................................... 7
4 - SETTING UP PRO-DIALOG PLUS CONTROL..................................................................................................................... 8
4.1 - Local interface general features................................................................................................................................................... 8
4.2 - Unit start/stop control.................................................................................................................................................................. 9
4.3 - Menus........................................................................................................................................................................................ 10
4.4 - General menu structure.............................................................................................................................................................. 11
4.5 - Menu tree structure.................................................................................................................................................................... 12
5 - PRO-DIALOG PLUS CONTROL OPERATION................................................................................................................... 26
5.1 - Start/stop control........................................................................................................................................................................ 26
5.2 - Heating/cooling selection.......................................................................................................................................................... 26
5.3 - Evaporator water pump control................................................................................................................................................. 27
5.4 - Condenser water pump control.................................................................................................................................................. 27
5.5 - Control interlock contact........................................................................................................................................................... 27
5.6 - Evaporator heater control.......................................................................................................................................................... 27
5.7 - Control point.............................................................................................................................................................................. 27
5.8 - Demand limit............................................................................................................................................................................. 28
5.9 - Limiting the unit running current.............................................................................................................................................. 28
5.10 - Capacity control....................................................................................................................................................................... 28
5.11 - Determining the lead circuit.................................................................................................................................................... 28
5.12 - Circuit loading sequence......................................................................................................................................................... 28
5.13 - Compressor start-up sequence in one circuit........................................................................................................................... 28
5.14 - EXV control............................................................................................................................................................................. 28
5.15 - Motor cooling valve control.................................................................................................................................................... 29
5.16 - Head pressure control on air-cooled units............................................................................................................................... 29
5.17 - Head pressure control on water-cooled units........................................................................................................................... 29
5.18 - Head pressure setpoint selection.............................................................................................................................................. 29
5.19 - High pressure load shedding function..................................................................................................................................... 29
5.20 - High current load shedding function....................................................................................................................................... 29
5.21 - Start-up procedure - pre-lubrication........................................................................................................................................ 29
5.22 - Master/slave assembly............................................................................................................................................................. 29
5.23 - Controlling Pro-Dialog Plus units with a System Manager.................................................................................................... 30
5.24 - Optional heat reclaim module.................................................................................................................................................. 30
6 - DIAGNOSTICS - TROUBLESHOOTING.............................................................................................................................. 31
6.1 - General....................................................................................................................................................................................... 31
6.2 - Displaying alarms...................................................................................................................................................................... 31
6.3 - Resetting alarms........................................................................................................................................................................ 31
6.4 - Alarm codes............................................................................................................................................................................... 32
The cover illustrations are solely for illustration, and form 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.
1 - SAFETY CONSIDERATIONS
2 - GENERAL DESCRIPTION
1.1 - General
2.1 - 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).
PRO-DIALOG Plus is a system for controlling units which use
screw compressors:
• Single or dual circuit
• Air or water-cooled condensers
• Non-reversible heat pumps
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.
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.
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.
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.
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: Even when the unit is switched off, the power
circuit remains energized as long as the unit or circuit disconnect is not open. Refer to the wiring diagram for details.
Use the adapted safety guidelines.
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.
Safety circuits are constantly monitored by PRO-DIALOG Plus
to ensure safe operation of the unit. PRO-DIALOG Plus also
gives access to a Quick Test program covering all inputs and
outputs.
All PRO-DIALOG Plus controls can work in accordance with
three independent modes:
• Local mode: the machine is controlled by commands from
the user interface.
• Remote mode: the machine is controlled by remote
contacts (volt-free contacts, analogue signals).
• CCN mode: the machine is controlled by commands from
the Carrier Comfort Network (CCN). In this case a data
communication cable is used to connect the unit to the
CCN communication bus.
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.
2.2 - Abbreviations used
In this manual the circuits are called circuit A and circuit B.
The compressors in circuit A are labelled A1 and A2. Those in
circuit B are labelled B1 and B2.
The following abbreviations are frequently used:
AI
-
Analogue Input
AO
-
Analogue Output
CCn -
Operating type: CCN
CCN -
Carrier Comfort Network
DI
-
Discrete Input
DO
-
Discrete Output
EXV -
Electronic Expansion Device
LED -
Light Emitting Diode
Loader -
Compressor capacity step
LOFF -
Operating type: Local off
rEM -
Operating type: by remote control contacts
SCPM -
Compressor Protection Module
SCT -
Saturated disCharge Temperature
SIO
-
Standard Input/Output - internal communication
bus linking the basic board to the slave boards
SST -
Saturated Suction Temperature
3 - HARDWARE DESCRIPTION
The various control components are arranged in modules
within the control cabinet:
3.1 - General
•
Control board
2
9
1
•
3
•
4
8
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
8xDO boards together with the fan circuit breakers and
contactors.
3.2 - Electronic boards
7
6
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
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.
3.2.2 - Slave boards
• Compressor board SCPM: This board is used to control
a compressor. Up to four SCPM boards can be connected
to the basic board. It also controls the inputs and outputs
connected to the compressor, such as oil level, oil pump,
loaders, motor cooling valves, etc.
• 8xDO board (auxiliary type 2): This board can be used
to control fan stages.
• PD4-EXV board: This board can control two EXV valves.
• 8xDO-4xAI-2xAO board (auxiliary type 1): This
optional board allows:
- control of the fan stages
- reading the temperature in the heat reclaim condensers
- control of the variable-speed fans (air-cooled units) or
the condenser valve (water-cooled units).
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 SCPM compressor boards, 8xDO
boards (auxiliary type 2) or 8xDO-4xAI-2xAO boards
(auxiliary type 1).
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.
Control box
1
Legend
1 Power supply disconnect switch
2 Fan start-up module
2
4
3
3
4
5
Compressor start-up module
Control system
User interface
5
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.
3.2.7 - 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.
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.
Green LED (item SIO on the board)
• This LED flashes continuously to show that the board is
communicating correctly over its internal bus.
• If this LED is not flashing, check the wiring of the SIO
bus and the address of the board (slave board only). If the
basic board is not linked to any slave boards, this LED
should not flash.
• If all slave boards indicate a communication fault, check the
SIO bus connection on the basic board. If this connection
is correct and the fault persists, replace the basic board.
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 connector J12 of the SCPM boards, terminal J4 of the
PD4-EXV board, and terminal J9 of auxiliary boards type 1 or
2 respectively.
Incorrect connection will render the system inoperative.
3.2.5 - Slave board addresses
Every slave 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 SCPM boards SIO address switch is
labelled ‘ADDR’.
NOTE: Any incorrect address will prevent the unit from
starting. Turn off the power before amending the address of
any auxiliary board.
Red LED
• The MAIN red LED flashes at about 2 second intervals to
show that the module is working properly.
• Irregular flashing or no flashing is a sign of a defective
board.
Orange LED - CCN/clock 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).
Board addresses
Board
DIP switch (0 = open)
1
2
3
4
5
6
7
8
PD4-EXV
1
0
1
1
1
0
0
0
Auxiliary board type 1 or 2 - # 1
1
0
0
0
1
1
0
0
Auxiliary board type 1 or 2 - # 1
0
0
0
1
1
1
0
0
SCPM # 1 (compressor A1)
0
0
1
0
1
0
1
0
SCPM # 2 (compressor A2)
1
1
1
1
1
0
1
0
SCPM # 3 (compressor B1)
0
1
0
1
0
1
1
0
SCPM # 4 (compressor B2)
1
0
1
0
1
1
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.
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 auxiliary board type 1)
• in the case of water-cooled units, a water valve. This valve
is controlled by an auxiliary board type 1 which supplies a
0-10 V d.c. signal.
3.3.3 - The evaporator pump
In appropriate cases the controller can also regulate an evaporator pump. This facility does not require an additional board.
3.3.4 - The condenser pump
In appropriate cases the controller can also regulate a condenser
pump (for water-cooled units). This control does not require an
additional board.
3.3.5 - The evaporator heater
The evaporator heater can be regulated by the unit control on
air-cooled units to protect the evaporator against frost. This
control requires an additional board.
3.3.6 - 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 (high pressure type, except for the low
ambient temperature option when the sensor used is a
wide-band sensor)
• Economizer pressure (high pressure type)
These electronic sensors deliver 0 to 5 V d.c. The economizer
and oil pressure sensors are connected to the SCPM board and,
as the others, are measured by the basic board.
Discharge pressure sensors
These are on the high pressure side of each circuit. They
replace the usual discharge gas pressure gauges and are used to
control head pressure or high pressure load shedding.
Oil pressure sensors
These sensors are located at the oil pressure port of each
compressor. The economizer pressure is subtracted from this
value to arrive at the differential oil pressure.
Suction pressure sensors
They are located in the high-pressure side of the evaporator,
and measure the low-pressure side of each circuit.
Economizer pressure sensors
These sensors measure the intermediate pressure between high
and low pressure. They are used to control the oil pressure
differential. They are located at the plate heat exchanger outlet
(for units equipped with economizers) or on the motor cooling
line of each motor.
3.3.7 - Thermistors
These all have similar characteristics.
Evaporator entering and leaving water temperature sensor
The evaporator entering water temperature sensor and the
leaving water temperature sensor are installed in the entering
and leaving side water box.
Discharge gas sensor
This sensor is used to measure the discharge gas temperature,
and permits control of the discharge temperature superheat. It
is located in the discharge line of each compressor.
Motor sensor
This is used to control the motor temperature of each compressor.
The terminals of this sensor are situated on the compressor
terminal board.
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. They may be fitted as options.
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 in 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.
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).
Connection terminals
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
Critical fault relay output
J3 / CH25
37-38
Indicates that the compressor control contactor
is stuck closed
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
24 V a.c., 20 mA
flow control contact. It can be used for any user
Connector: 10 pin WAGO 734-110, pitch 3.5
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.
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
or
remote heat reclaim control
The remote heating/cooling control command is
only used if the unit is under remote operation
control (rEM). See section 4.2.1.
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
This 0-10 V d.c. input is used for setpoint reset
or unit demand limit. It is active, whatever the
unit operating type. This 0-10 V signal can be
supplied by a user command or a 0-10 V
temperature sensor.
Connector: 2 pin WAGO 231-302/026000
pitch 5.08
Connection to CCN
J12
1-2-3
A RS-485 bus is used for connection to the CCN.
The CCN connector is located on the CCN/clock
board (inserted on the PD4 BASIC board)
- Pin 1: signal +
- Pin 2: ground
- Pin 3: signal -
Use of a shieled cable (max. length: 1000m).
Shielding: braiding on 95%-100% of the
cable surface.
Shielding connection at the two cable ends.
Description
Connector/
channel
Terminal
Description
Remarks
Condenser water flow switch
input
J5/CH17
This contact is used to detect lack of condenser
water flow and shuts down the unit.
24 V a.c - 20 mA
Evaporator 1 and 2 pump
operation input
J5/CH18
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*.
Evaporator 2 control
J2/CH20
This contact permits control of evaporator 2
pump by the unit*.
Condenser pump control
J2/CH21
This contact permits control of condenser pump
by the unit*.
Available terminals
*
24 V a.c. internal supply.
Max. consumption
- each output: 20 VA/10 W
- for all 3: 40 VA/20 W if all are used
Associated functions, if selected: automatic changeover, pump 1 and 2; manual or CCN selection; periodical; by default.
4 - SETTING UP PRO-DIALOG PLUS CONTROL
4.1 - Local interface general features
Main interface
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).
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
Permits the selection of a main menu. Each main menu is represented by an icon. The icon is lit if active.
Menu
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
INFORMATION menu
Displays the general operating parameters for the unit.
TEMPERATURES menu
Displays the unit operating temperatures.
PRESSURES menu
Displays the unit operating pressures.
SETPOINTS menu
Displays the unit setpoints and enables them to be modified.
INPUTS menu
Displays the status of the unit digital and analogue inputs.
OUTPUTS/TESTS menu
Displays the status of the unit outputs and enables them to be tested.
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.
kPa
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.
Red LED:
Water flow switch default or user safety lock open.
Green LED:
The evaporator pump is running.
Yellow LEDs:
From top to bottom - start/stop status of compressor A1 and A2
or B1 and B2. 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.
CCN*
CCN. The unit is controlled by CCN commands.
rEM*
Remote. The unit is controlled by remote control contacts.
MAST*
Master Unit. The unit runs as a master in a two unit lead/lag
arrangement. This is displayed if the unit is configured for
master/slave control. See section 5.21.
*
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.
TO STOP THE UNIT
SUMMARY INTERFACE PUSH BUTTONS
BUTTON DISPLAY
Blue button: evaporator leaving or entering water temperature in °C
Gray button: outdoor air temperature in °C
Control point (setpoint + reset) in °C
Press 1: circuit A/B discharge pressure in kPa
Press 2: circuit A/B saturated condensing temperature in °C
kPa
Press 1: circuit A/B suction pressure in kPa
Press 2: circuit A/B saturated suction temperature in °C
Press 1: compressor A1/B1 operating hours in h/10 or h/100
Press 2: compressor A2/B2 operating hours in h/10 or h/100
4.2 - Unit start/stop control
4.2.1 - Description
The unit start/stop can be controlled by one of the following
methods:
• Locally on the actual unit (Local control type)
• By remote control with the aid of user contacts (remote
control type)
• By CCN control with the aid of the CCN (CCN control
type)
BUTTON ACTION
2-DIGIT DISPLAY 4-DIGIT DISPLAY
C
LOFF
Press the Start/Stop button for less than
4 seconds (one short
press is enough).
If the button is released, the unit stops
without the need for
further action.
t
LOFF
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
2-DIGIT
DISPLAY
4-DIGIT
DISPLAY
Continually press the operating type
C
selection button for more than 4 seconds.
LOFF
Hold down the Start/Stop button. The
available operating types are displayed
one by one until the button is released.
L-On
L-Sc
rEM
The main interface includes a Start/Stop button which can be
used to stop or start the unit in the local operating type or to
select the remote or CCN operating type.
Release the Start/Stop button if the
operating type you want is displayed (in
this example L-On). “C” flashes in the 2digit display to show that the controller is
awaiting confirmation.
The available operating types are described in the following
table.
Press the Enter button to confirm the
operating type selected (in this example:
L-On). “t” is displayed in the 2-digit
display to indicate the operating type
selected. If the Enter button is not
pressed soon enough, the controller will
cancel the change and continue to use
the previous operating type.
L-On
t
L-On
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
MENU LED
BUTTON
ITEM NUMBER
2-DIGIT
DISPLAY
Press the MENU button until the
LED marked PRESSURE lights.
0
Press one of the Arrow buttons until the two-digit display shows 3
(item number 3).
kPa
0
MODIFYING THE VALUE OF A PARAMETER
OPERATION
PRESS MENU LED
button
ITEM
NUMBER
2-DIGIT
DISPLAY
Hold on the MENU button until the
LED for SETPOINT lights.
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).
1
ITEM
NUMBER
4-DIGIT
DISPLAY
1
6.0
1
6.0
Keep pressing the Down Arrow
button until the value 5.7 is
displayed in the four-digit display.
The Setpoint menu LED keeps
flashing.
1
5.9
1
5.8
1
5.7
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
5.7
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.
1
kPa
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 sub-menu. The LED
for the menu to which the item belongs then stops flashing,
indicating that modification mode no longer applies.
In modification mode, the value to be modified increases or
decreases in steps of 0.1 every time you press the Arrow buttons.
Holding one of these buttons down increases the rate of increase
or decrease.
10
The example below shows how to modify the value of item 1 in
the Setpoint menu.
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.
OUTPUT 1
[OUTPUT 1]
STATUS
USER 1
[USEr 1]
PRESSURES USER 2
[USEr 2]
SUB-SUB-SUB-MENUS
OUTPUT 2
[OUTPUT 2]
TEMPERATURES
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]
FACTORY 1
[FACTORY 1]
RUNTIME 1
[RuntiME 1]
RUNTIME
FACTORY 2
[FACTORY 2]
MAINTENANCE
[MAintEnAnCE]
NOTE: The items in brackets show what is
displayed on the user interface.
MASTER/SLAVE
[MAStEr SLAvE]
FACTORY
[FACtorY]
SERVICE 3
[SErviCE 3]
SERVICE
[SErviCE]
SERVICE 2
[SErviCE 2]
ALARMS HISTORY
SERVICE 1
[SErviCE 1]
SUB-SUB-MENUS
SUB-MENUS
CONFIGURATION
MAIN MENUS
4.4 - General menu structure
11
12
Default display
Active modes
Chiller occupied/
unoccupied
Minutes left
Cooling/heating
selection
Heat reclaim selection
Unit capacity in %
Capacity circuit A in %
Capacity circuit B in %
Present demand limit
in %
Present lag limit in %
Setpoint in local
control
Setpoint occupied/
unoccupied mode
Active setpoint
Control point
Controlled water
temperature
Condensing point
Heat reclaim indicator,
circuit A
Heat reclaim indicator,
circuit B
-
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Water loop
temperature, master/
slave assembly
Outdoor temperature
Temperature motor B2
Temperature motor B1
Discharge superheat,
circuit B
Gas discharge
temperature, circuit B
Saturated suction
temperature, circuit B
Saturated discharge
temperature, circuit B
Temperature motor A2
Temperature motor A1
Discharge superheat,
circuit A
Gas discharge
temperature, circuit A
Saturated suction
temperature, circuit A
Saturated discharge
temperature, circuit A
Heat reclaim water
leaving temperature
Heat reclaim water
entering temperature
Condenser water
leaving temperature
Condenser water
entering temperature
Evaporator water
leaving temp.
Evaporator water
entering temp.
TEMP
Condensing setpoint
Heating setpoint
Cooling setpoint 2
Cooling setpoint 1
SETPOINTS
Heating - threshold
for zero reset
Cooling - max. reset
value
Cooling - threshold
for max. reset
Cooling - threshold
for zero reset
Heating mode ramp
Cooling mode ramp
Heat reclaim pressure,
circuit B
Heat reclaim pressure,
circuit A
Remote discharge
pressure, circuit B
Remote discharge
pressure, circuit A
Economizer B2
pressure
Economizer B1
pressure
-
-
-
-
-
-
Oil differential pressure, Heating - max. reset
compressor B2
value
Oil differential pressure, Heating - threshold
compressor B1
for max. reset
Oil pressure,
compressor B2
Oil pressure,
compressor B1
Suction pressure,
circuit B
Discharge pressure,
circuit B
Economizer A2
pressure
Economizer A1
pressure
Oil differential pressure, Demand limit
compressor A2
setpoint in %
Oil differential pressure, Heat reclaim setpoint
compressor A1
Oil pressure,
compressor A2
Oil pressure,
compressor A1
Suction pressure,
circuit A
Discharge pressure,
circuit A
PRESSURES
-
-
-
Total compressor
operating current
Compressor current B2
Compressor current B1
Compressor current A2
Compressor current A1
External 0-10 V d.c. signal
Oil level, circuit B
Oil level, circuit A
Control box thermostat
and phase reversal
interlock control
Water flow control,
condenser
Evaporator pump fault
detection
Water flow control and
customer interlock
Demand limit selection
Contact 4: remote heat
reclaim operation
Contact 3: remote
heating/cooling
Contact 2: remote
setpoint
Contact 1: remote on/off
INPUTS
MENU
NOTE: The items in brackets show what is displayed on the user interface.
STATUS
ITEM
**
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SUB-MENU:
Factory Configuration
[FACtorY]
SUB-MENU:
Service Configuration
[SErviCE]
SUB-MENU:
User Configuration
[USEr]
CONFIG
Displayed if the alarm exists
Not in use
SUB-MENU:
Outputs 2
[OUTPUTS2]
SUB-MENU:
Outputs 1
[OUTPUTS1]
OUTPUTS
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Active alarm code 5**
Active alarm code 4**
Active alarm code 3**
Active alarm code 2**
Active alarm code 1**
Number of active
alarms/resets
ALARMS
-
-
-
-
-
-
-
-
-
-
Historic alarm code 10
Historic alarm code 9
Historic alarm code 8
Historic alarm code 7
Historic alarm code 6
Historic alarm code 5
Historic alarm code 4
Historic alarm code 3
Historic alarm code 2
Historic alarm code 1
ALARMS HIST
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SUB-MENU:
Maintenance
SUB-MENU:
Runtimes
RUNTIMES
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
-
OCCUPIEd
UNOCCUPIEd -
COOL
HEAT
rECLAIM
-
ALArM
ALErt
-
MAStEr
SLAvE
-
1 [1]
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
2 [2]
occu
unoc
Forc
-
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.
3
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
nn.n
4 [2]
HEAt
COOL
1:
2:
3:
4.
5.
6.
7.
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
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.
10
nnn
5 [2]
%
Present lag chiller demand limit. Displayed when the master/slave control is selected.
11 [2]
SP-1
SP-2
AUtO
-
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.
12 [2]
occu
unoc
Forc
-
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.
13
±nn.n
°C
Active setpoint. This is the current cooling/heating setpoint: it refers to cooling/heating setpoint 1 or 2.
14
±nn.n
Forc
°C
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)
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.
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.
13
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 than the frost protection threshold.
15,16
Low discharge superheat protection
15 = circuit A & 16 = circuit B.
In this mode the circuit capacity is not authorised to rise.
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
High current protection
19 = circuit A & 20 = circuit B. Circuit capacity is not allowed to rise, as the compressor has reached the high
current protection threshold and could be shut down.
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 Costomer 1 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
4.5.3 - Description of the Pressures menu
TEMPERATURES MENU [2]
PRESSURES MENU [2]
ITEM FORMAT UNITS COMMENTS
ITEM
FORMAT
UNITS
COMMENTS
0
0
nnnn kPa
Discharge pressure circuit A
±nn.n °C
Evaporator entering water temperature
1
±nn.n °C
Evaporator leaving water temperature
1
nnnn kPa
Suction pressure circuit A
2[1]
±nn.n °C
Condenser entering water temperature
2
nnnn kPa
Oil pressure compressor A1
3[1]
±nn.n °C
Condenser leaving water temperature
3[1]
nnnn kPa
Oil pressure compressor A2
4[1]
±nn.n °C
Reclaim condenser entering water temperature
4
nnnn kPa
Differential oil pressure compressor A1
5[1]
±nn.n °C Reclaim condenser leaving water temperature
5[1]
nnnn kPa
Differential oil pressure compressor A2
6
±nn.n °C Saturated discharge temperature circuit A
6
nnnn kPa
Economizer pressure A1
7
±nn.n °C
Saturated suction temperature circuit A
7[1] nnnn kPa Economizer pressure A2
8
±nn.n °C Discharge gas temperature circuit A
8
nnnn kPa
Discharge pressure circuit B
9
±nn.n °C Discharge superheat temperature circuit A
9
nnnn kPa
Suction pressure circuit B
10
±nn.n °C
Motor temperature A1
10
nnnn kPa
Oil pressure compressor B1
11[1] ±nn.n °C
Motor temperature A2
11[1]
nnnn kPa
Oil pressure compressor B2
12
±nn.n °C
Saturated discharge temperature circuit B
12 nnnn kPa
Differential oil pressure compressor B1
13
±nn.n °C Saturated suction temperature circuit B
13[1]
nnnn kPa
Differential oil pressure compressor B2
14
±nn.n °C Discharge gas temperature circuit B
14 nnnn kPa
Economizer pressure B1
15 ±nn.n °C
Discharge superheat temperature circuit B
15[1]
nnnn kPa
Economizer pressure B2
16 ±nn.n °C
Motor temperature B1
16[1]
nnnn
kPa
Remote discharge pressure, circuit A
17[1] ±nn.n °C
Motor temperature B2
17[1]
nnnn
kPa
Remote discharge pressure, circuit B
18
±nn.n °C Outdoor temperature
18[1]
nnnn
kPa
Pumpdown pressure, heat reclaim, circuit A
19[1] ±nn.n °C
Water loop temperature, master/slave assembly
19[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.
14
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.
Setpointdescriptioncontrol forcontrol for
leaving waterentering water
Cooling
Minimum setpoint
- Water
- Medium Brine
- Low Brine
Maximum setpoint
3.3°C
-10°C
-20°C
9.3°C
-4°C
-14°C
Heating*
Maximum setpoint
MCT - 4.0 K MCT - 10.0 K
Note:
Three setpoint reset configuration modes can be selected in the Customer 1
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.
* MCT = Maximum Condensing Temperature (depending on the application)
15
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 contact status* and customer interlock control
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
OPEn/CLoS
-
Oil level, circuit A
10
OPEn/CLoS
-
Oil level, circuit B
11
0 - 10
Volts
External signal
12
nnn
Amp.
Compressor A1 current
13[1]
nnn
Amp.
Compressor A2 current
14[1]
nnn
Amp.
Compressor B1 current
15[1]
nnn
Amp.
Compressor B2 current
16
nnnn
Amp.
Total compressor operating current
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
16
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
2 [1]
3 [1]
tEST
4 [1]
tEST
DESCRIPTION
This item returns you to the previous menu.
-
-
-
-
Compressor status
b1 = compressor A1
b2 = compressor A2
b3 = compressor B1
b4 = compressor B2
The compressor status cannot be forced
Loader status
b1 = loader 1 circuit A
b2 = loader 2 circuit A
b3 = loader 1 circuit B
b4 = loader 2 circuit B
This item permits display of the loader status in circuits A or 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.
Motor cooling valve status/test circuit A
b1 = main valve compressor A1
b2 = additional valve or economizer compressor A1
b3 = main valve compressor A2
b4 = additional valve or economizer compressor A2
This item permits display of the motor cooling valve 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.
Motor cooling valve status/test circuit B
b1 = main valve compressor B1
b2 = additional valve or economizer compressor B1
b3 = main valve compressor B2
b4 = additional valve or economizer compressor B2
This item permits display of the motor cooling valve 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.
5
tEST
%
Motor cooling valve cycle status/test, circuit A
Only for units with economizer
6
tEST
%
Motor cooling valve cycle status/test, circuit B
Only for units with economizer
7
tESt
-
Oil solenoid valve status/test
b1 = oil solenoid valve compressor A1
b2 = oil solenoid valve compressor A2
b3 = oil solenoid valve compressor B1
b4 = oil solenoid valve compressor B2
This item permits display of the different compressor valves.
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.
8
tESt
Refrigerant shut-off valve status/test
Only for units with evaporator heater
b1 = Shut-off valve, circuit A
b2 = Shut-off valve, circuit B
-
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each heater output.
9
tESt
10
tESt
-
-
Oil heater output status/test, circuits A and B
b1 = oil heater, circuit A
b2 = oil heater, circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each heater output.
Oil pump output status/test, circuits A and B
b1 = oil pump, circuit A
b2 = oil pump, circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each oil pump
output.
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
17
OUTPUTS STATUS 2 AND TESTS MENU [2] [3]
ITEM
FORMAT
UNITS
0
DESCRIPTION
This item returns you to the previous menu.
1 [1]
tESt
0 - 8
Fan contactor status/test, circuit A
This item permits display of the number of fan stages. It also permits them to be tested in a sequentially. In test mode the
direction arrows permit successive display from 0 to 8, so as to authorise the forcing the outputs.
2 [1]
0-8
Fan contactor status/test, circuit B
This item permits display of the number of fan stages. It also permits them to be tested in a sequentially. In test mode the
direction arrows permit successive display from 0 to 8, so as to authorise the forcing the outputs.
tESt
3
tESt
-
Alarm command status/test
b1 = alarm circuit A
b2 = alarm circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each alarm
output.
4
tESt
%
EXV position, circuit A
In the test mode the direction arrows permit forcing the valve to its fully open position.
5
tESt
%
EXV position, circuit B
In the test mode the direction arrows permit forcing the valve to its fully open position.
6 [1]
tESt
%
Variable speed fan, circuit A or condenser water valve position in %
7 [1]
tESt
%
Variable speed fan, circuit B or condenser water valve position in %
8
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
9
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
10
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
-
11[1]
nn
-
Evaporator heater and heat reclaim condenser status
b1 = evaporator heater
b2 = heat reclaim condenser heater
12[1]
%
Condenser water valve position in heat reclaim mode
tESt
13[1]
14
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
18
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).
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.
The menus User 1 [USEr 1] and User 2 [USEr 2] are passwordprotected. The other menus are directly accessible, except if
item 6 of the User 1 menu (password for all configurations) has
been validated.
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
[ScHEduLE 2 MEnu]*
HOLIDAYS
[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
start-up*
Hour*
SUB-MENU:
Period 1 [PErIod 1]
SUB-MENU:
Period 1 [PErIod 1]
SUB-MENU:
Holidays 1 [HOLidAy 1]
Broadcast acknowledger
selection
Circuit capacity
increase sequence
Night mode - start
hour*
Day of the week*
SUB-MENU:
Period 2 [PErIod 2]
SUB-MENU:
Period 2 [PErIod 2]
SUB-MENU:
Holidays 2 [HOLidAy 2]
Broadcast activation
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:
End day daylight saving
Holidays 10 [HOLidAy 10] time
11
Extended display
selection
-
-
-
-
SUB-MENU:
End hour daylight saving
Holidays 11 [HOLidAy 11] time
12
Password for all user
configurations
-
-
-
-
SUB-MENU:
Minutes to subtract
Holidays 12 [HOLidAy 12]
13
Software version
number
-
-
-
-
SUB-MENU:
Holidays 13 [HOLidAy 13]
14
Total compressor
current limit
-
-
-
-
SUB-MENU:
Holidays 14 [HOLidAy 14]
15
-
-
-
-
-
SUB-MENU:
Holidays 15 [HOLidAy 15]
16
-
-
-
-
-
SUB-MENU:
Holidays 16 [HOLidAy 16]
*
SCHEDULE 1
[ScHEduLE 1 MEnu]*
Only displayed if configuration requires.
19
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
PERIOD 4
PERIOD 4
PERIOD 5
PERIOD 5
PERIOD 6
PERIOD 6
HOUR + DATE
[dAtE]*
BROADCAST
[broAdCASt]*
HOLIDAY 3
HOLIDAY 4
HOLIDAY 5
HOLIDAY 6
PERIOD 7
PERIOD 7
PERIOD 8
PERIOD 8
HOLIDAY 7
HOLIDAY 8
...
...
...
HOLIDAY 15
HOLIDAY 16
SUB-MENU PERIOD CONFIGURATION*
SUB-MENU HOLIDAY CONFIGURATION*
Item
PERIOD 1 to 8
[PEriod X MEnu]*
Item
HOLIDAYS 1 to 16
[HoLidAy X MEnu]*
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
*
Only displayed if configuration requires.
5
Selection Wednesday
6
Selection Thursday
7
Selection Friday
8
Selection Saturday
9
Selection Sunday
10
Selection holidays
20
NOTE: The items in brackets show what is displayed on the
user interface.
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
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.
1 to 15
min
1
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]
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.
24 to 3000
hours
48
7
0/1/2/3
-
0
Automatic reset 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.
14
nnnn
Amp
1500
Total compressor current limit
This item is used to set the maximum limit for the total compressor running current (see paragraph “ProDialog Plus control operations/Limiting the unit running current”)
Legend
1 This item is masked when not used.
2 Access to menu is read/write.
21
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
COMMENTS
When selected this item authorises return to the previous menu.
1[1]
YES/no
-
no
Periodic pump quick-start of the water pump(s)
Yes = the pump is started periodically when the unit is manually stopped.
No = periodic pump start is disabled
When the unit is manually stopped (e.g. during the winter season) the pump is started each day at 14.00
hours for 2 seconds. If two pumps are available, pump #1 is started on odd days and pump #2 on even days.
2 [1]
n1n2n3 n4
00:00 to 23:59 -
00:00
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.
3 [1]
n1n2n3 n4
00:00 to 23:59 -
00:00
Night control mode - end time*
Authorises entering the time of day at which the night control mode ends.
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.
*
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
DATE & TIME CONFIGURATION SUB-MENU
ITEM
FORMAT
COMMENTS
0
dAtE MEnu
When selected this item authorises return to the
previous menu.
n1n2n3n4
Current time setting.
00:00 to 23:59 n1n2: hours (00 to 23). The first time the Enter button is
continuously pressed, the first two characters in the
4-digit display flash so that hours can be adjusted.
n3n4: minutes (00 to 59). Continuous pressing of the
Enter key again causes the last two characters to
flash and minutes can be adjusted.
1
2
«Mon»
«tUe»
«uEd»
«tHu»
«FrI»
«SAt»
«Sun»
Current day of week setting.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
n1n2n3n4
Current day and month setting.
01:01 to 31:12 n1n2:day (01 to 31). The first time the Enter button is
continuously pressed, the first two characters in the
4-digit display flash so that day can be adjusted.
n3n4:month (01 to 12). Continuous pressing of the
Enter key again causes the last two characters to
flash so that month can be adjusted.
3
4
nnnn
Current year setting.
4.5.7.6 - Description of the Time Schedules sub-menus
The control provides two timer programs. If the CCN/clock
board is not installed, the two schedules are permanently in
occupied mode.
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.
22
PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 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. 0 = period not 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.
8
SA- 0 or SA- 1
1 = the period is in effect on Saturday. 0 = period not in effect on Saturday.
9
Su- 0 or Su- 1
1 = the period is in effect on Sunday. 0 = period not in effect on Sunday.
10
1 = the period is in effect on public holidays. 0 = period not in effect on public holidays.
*
Ho- 0 or Ho- 1
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
FRI
SAT SUN HOL
P1
P1
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
ATTENTION: The broadcast function must be activated to
utilise the holiday schedule, even if the unit is running in
stand-alone mode (not connected to CCN). See section 4.5.7.6.
HOLIDAY PERIOD X CONFIGURATION SUB-MENUS (X = 1 to 16)
ITEM #
FORMAT
COMMENTS
0
HoLidAy X Sub-menu
When selected this item authorises a return
to the configuration menu.
1
0 to 12
Start month of public holiday period
0 = period not in use
1 = January, 2 = February, etc.
2
0 to 31
Start day of public holiday period. 0 period
not in use.
3
0 to 99 days
Duration of the public holiday period in
days.
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
This menu also authorises setting the date to begin and end
daylight saving time. There should be only one broadcaster in a
CCN, so this table should not be configured if any other system
element is acting as broadcaster.
MON : TUE : WED : THU : FRI : SAT : SUN : HOL : P3
P3
P3
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.
P1
P2
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).
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Public holidays
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.
P6
Occupied
Unoccupied
Starts at
P1: period 1,
P2: period 2,
P3: period 3,
P4: period 4,
P5: period 5,
P6: period 6,
P7: period 7,
P8: period 8,
0h00,
3h00,
7h00,
18h00,
7h00,
21h00,
7h00,
17h00,
7h00,
12h00,
20h00,
21h00,
Not used in this example
Not used in this example
Ends at
Active on
Monday
Monday and Tuesday
Wednesday
Thursday and Friday
Saturday
Public holidays
23
BROADCAST CONFIGURATION SUB-MENU
ITEM #
FORMAT
COMMENTS
0
broAdCASt MEnu
When selected this item authorises a return to the main menu.
1
YES/no
Determines whether or not the unit is a broadcast acknowledger when the unit is connected on a CCN network. There must be
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
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.
YES/no
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.
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.
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.
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*
ALARMS MENU
3 [1]
nn
Alarm history code 3*
ITEM #
DESCRIPTION
4 [1]
nn
Alarm history code 4*
X alarms are active
Reset of alarms is requested
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*
nn
Alarm history code 10*
0 [1]
FORMAT
X ALArM
rESEt ALArM
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*
10 [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
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
24
4.5.10 - Runtime menu description
4.5.10.2 - Maintenance menu description
To be active, the maintenance function must be preset in the
Service configuration.
RUNTIMES
ITEM # FORMAT
RUNTIMES 1
[runtiMES 1]
RUNTIMES 2
[runtiMES 2]
MAINTENANCE
[MAintEnAnCE]
NOTE: The items in brackets show what is displayed on the
user interface.
4.5.10.1 - Description of the Runtimes 1 menu
RUNTIMES MENU [2]
iTEM # FORMAT
UNIT
COMMENTS
0
-
When selected this item
authorises return to the previous
menu
-
1
nnnn | M 10 | M100
hrs/10 or 100
Unit operating hours*
2 [1]
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 B1 operating hours*
5 [1]
nnnn | M 10 | M100
hrs/10 or 100
Compressor B2 operating hours*
6
nnnn | M 10 | M100
-/10 or 100
Machine starts*
7
nnnn | M 10 | M100
-/10 or 100
Compressor A1 starts*
8 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor A2 starts*
9 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B1 starts*
10 [1]
nnnn | M 10 | M100
-/10 or 100
Compressor B2 starts*
11
nnnn
-
Number of start-ups for the
compressor with the highest
number during the last hour
12 [1]
nnnn
-
Average number of compressor
start-ups/hour for the last 24
hours
13 [1]
nnnn | M 10 | M100
hrs/10 or 100
Pump #1 operating hours*
14 [1]
nnnn | M 10 | M100
hrs/10 or 100
Pump #2 operating hours*
15 [1]
nnnn | M 10 | M100
hrs/10 or 100
Condenser pump operating
hours
0
DESCRIPTION
MAintEnAnCE MEnu When selected this item authorises return to the
previous menu.
1 [1]
Accessible with the Service password.
2 [1]
For future use
3 [1]
For future use
4 [1]
ALErt
Water loop rate to low
5 [1]
nnn/ALErt
Next primary pump maintenance operation in nnn
days. ‘ALErt’ is displayed, when the delay before
maintenance has elapsed.
6 [1]
nnn/ALErt
Next secondary pump maintenance operation in
nnn days. ‘ALErt’ is displayed, when the delay
before maintenance has elapsed.
7 [1]
nnn/ALErt
Next water filter maintenance operation in nnn
days. ‘ALErt’ is displayed, when the delay before
maintenance has elapsed.
Legend
1 This item is masked when not used.
Legend
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”.
25
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
PARAMETER STATUS
CONTROL UNIT
TYPE
MODE
LOFF L-ON L-SC rEM CCN MASt CHIL_S_S
REMOTE
MASTER
START/STOP CONTROL
CONTACT
TYPE
START/STOP CCN
GENERAL
SCHEDULE EMERGENCY ALARM
MODE
SHUTDOWN
-
-
-
-
-
-
-
-
-
-
Enable
-
-
Off
-
-
-
-
-
-
-
-
-.
-.
-
Yes
-
Off
Active -
-
-
-
-
-
-
-
-
-
-
Local
Off
-
-
Active -
-
-
-
-
-
Unoccupied
-
-
Local
Off
-
-
-
Active -
-
-
Off
-
-
-
-
Remote
Off
-
-
-
Active -
-
-
-
-
Unoccupied
-
-
Remote
Off
-
-
-
-
Active -
Disable
-
-
-
-
-
CCN
Off
-
-
-
-
Active -
-
-
-
Unoccupied
-
-
CCN
Off
-
-
-
-
-
Active -
-
Local
Unoccupied
-
-
Local
Off
-
-
-
-
-
Active -
Off
Remote
-
-
-
Remote
Off
-
-
-
-
-
Active -
-
Remote
Unoccupied
-
-
Remote
Off
-
-
-
-
-
Active Disable
-
CCN
-
-
-
CCN
Off
-
-
-
-
-
Active -
-
CCN
Unoccupied
-
-
CCN
Off
-
Active -
-
-
-
-
-
-
-
Disable
No
Local
On
-
-
Active -
-
-
-
-
-
Occupied
Disable
No
Local
On
-
-
-
Active -
-
-
On
-
Occupied
Dsable
No
Remote
On
-
-
-
-
Active -
Enable
-
-
Occupied
Disable
No
CCN
On
-
-
-
-
-
Active -
-
Local
Occupied
Disable
No
Local
On
-
-
-
-
-
Active -
On
Remote
Occupied
Disable
No
Remote
On
-
-
-
-
-
Active Enable
-
CCN
Occupied
Disable
No
CCN
On
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
26
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 prevent unit start-up if it is open and if the
start-up delay has passed. Furthermore, this contact must remain
closed when the unit is not in local off, remote or CCN control
mode. Opening this contact for more than 8 seconds while the
unit is operating, will cause immediate shut-down of the faulty
unit.
5.6 - Evaporator heater control
The pump is kept running for 20 seconds after the unit goes to
stop mode. The pump keeps working when the unit switches
from heating to cooling mode or vice-versa. It is turned off if
the unit is shut down due to an alarm unless the fault is a frost
protection error.
The pump can be started in particular operating conditions
when the evaporator heater is active. See section 5.21 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.
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.
27
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 and 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 parameters are configurable in the User1 menu (voltages at 0%
limitation and 100% of limitation). This function is not
available if reset by reference to an external 0-10 V d.c.
signal has already been selected.
Whatever the method used, demand limit is active in all
operating types: Local, Remote or CCN. However, in
Local operating type, demand limit can be disabled with
keypad commands (see section 4.3.3) and in CCN
operating type, demand limit can be controlled directly
with the aid of CCN commands.
NOTE: A limitation value of 100% means that the unit may
call upon the full array of its capacity stages.
Here is an example of demand limit by an external 0-10 V d.c.
signal. This example assumes that the limitation parameters are
such that at 0 volt the authorised capacity shall be maximum
capacity, and at 10 volts the authorised capacity shall be zero
(this is the default configuration).
Demand limit by 0-10 V d.c. signal
Maximum permitted capacity
No demand limit
Total demand limit
NOTE: If the same compressor undergoes too many starts
(per hour) this automatically brings about reduction of
compressor starts, which makes leaving water temperature
control less precise.
5.11 - 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.
• 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.
5.12 - Circuit loading sequence
Two circuit loading sequences are available. The choice of
sequence can be configured by the user in the Configuration
menu (see section 4.5.7.3).
• 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: 30HX and 30GX units use 06N twin-screw compressors.
The screw compressor efficiency is better at full load than at part
load. By default the ‘close control’* configuration is not validated, and the control will always try to optimise unit efficiency.
*
0-10 V dc demand limit
5.9 - Limiting the unit running current
This feature is used to avoid tripping the circuit breaker by:
• prohibiting an increase in compressor capacity when the
current reaches a first threshold.
• unloading one or more capacity stages when a second
protection threshold is reached.
See chapter: Description of the user 1 configuration sub-menu.
5.10 - Capacity control
This function adjusts the number of active compressors and
loaders to keep the 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.
28
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.
temperature precision has priority over compressor capacity. This parameter
is only accessible to Carrier Service.
5.13 - Compressor start-up sequence in one circuit
The first compressor to start is the one with the least number of
start-ups and operating hours. If both compressors are operating and the load decreases, the compressor that started first
shuts down. This avoids cycling of ther same compressor.
5.14 - EXV control
The electronic expansion valves (EXVs) control charging and
the refrigerant flow in the evaporator, maintaining the optimum
evaporator throttle and a correct discharge superheat. Opening
the valve permits reduction of the throttle, and thus improves the
heat exchange in the evaporator. This opening can be limited to
maintain the condenser subcooling and correct superheat,
avoiding liquid slugging at the compressors and ensuring
operating stability.
5.15 - Motor cooling valve control
5.20 - High current load shedding function
The temperature of the motor windings is controlled to a setpoint of 82°C. This is achieved by cycling of the motor cooling
valves to allow the liquid refrigerant to flow across the motor
windings, if necessary. On units equipped with economizers
with plate heat exchangers, a thermostatic valve controls the
necessary refrigerant flow entering this heat exchanger and
continuously flowing over the motor windings. All refrigerant
used for motor cooling returns to the rotors through an orifice
situated mid-way along the compression cycle and is compressed
to the discharge pressure.
This function does not require an additional board. It prevents
high current breaks on each compressor by the following means:
• Preventing any capacity increase on the compressor once
the high current value has reached an initial threshold
• Shedding one or more capacity stages once a second
protection threshold has been reached.
5.16 - Head pressure control on air-cooled units
5.21 - Start-up procedure - pre-lubrication
The saturated condensing temperature 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.
This procedure describes the necessary operations to ensure the
lubrication of the compressor before start-up.
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.
For the lead compressor (the first compressor in the circuit to
start):
1. Measure the initial oil pressure.
2. Activate the oil solenoid valve and start up the oil pump.
3. Wait approximately 15 seconds.
4. If oil pressure increases, pre-lubrication is assured and the
compressor can start.
5. If not, a further pre-lubrication cycle is started. Return to
point 1.
5.17 - Head pressure control on water-cooled units
The saturated condensing temperature is controlled by reference
to a user-definable fixed setpoint.
This temperature is maintained by using the valve to control the
flow of water in each condenser circuit.
In the event of capacity stages being shed, no capacity increase
will be authorised on the circuit concerned for a period of 5
minutes.
The control follows the sequence below:
NOTE: After three cycles, the low oil pressure alarm at prestart-up is acctivated, and prelubrication is also stopped.
5.18 - Head pressure setpoint selection
There are two head pressure setpoints available: the first is called
“head pressure setpoint” and the second “reclaim setpoint”. These
setpoints only have an effect when the control system is controlling head pressure: air or water-cooled units operating in cooling
mode (only when they are fitted with condenser water valves).
The active setpoint can be selected in one of the following ways:
• With item 5 of the information menu.
• With a volt-free selection contact connected to the customer
terminal block when the unit is in Remote operating type
(rEM). See section 3.4, description of the control contacts.
• With a network command when the unit is in CCN operating type (CCn).
For the lag compressor (one compressor in the circuit is already
in operation).
1. Activate the oil solenoid valve.
2. Wait approximately 15 seconds.
3. If oil pressure increases, pre-lubrication is assured and the
compressor can now start.
4. If not, the low oil pressure at start-up alarm is activated
and the pre-lubrication is also stopped.
5.22 - 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.
5.19 - High pressure load shedding function
This function does not require an additional board. It prevents
high pressure breaks 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.
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.
NOTE: The last capacity stage cannot be shed by this protection function. An alarm is activated, if the high pressure is
still too high.
29
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 volt-free
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.
5.23 - Controlling Pro-Dialog Plus units with a System
Manager
Up to eight PRO-DIALOG Plus units (or System Manager
compatible units) can be controlled by one control module of
the FSM or CSM III type which can handle multi-tasking of
control functions such as starting units in sequence.
5.24 - Optional heat reclaim module
This option only applies to air-cooled units, equipped with a
water-cooled heat reclaim condenser. An additional 4 x DO
board must be installed. This board permits control of:
• two solenoid shutoff valves for the heat reclaim coil, one
per circuit.
• two drain solenoid valves, one per circuit. These permit
draining the refrigerant from the inactive coil, when the
unit changes over from the cooling mode to the heat
reclaim mode.
Selecting the heat reclaim mode can be done with either the
local interface or remotely with the (recl_sw) contact or by CCN.
The heat reclaim function is active when: the heat reclaim
entering water temperature is lower than the heat reclaim
setpoint, minus half of the heat reclaim dead band.
The heat reclaim function is not active when: the heat reclaim
entering water temperature is higher than the heat reclaim
setpoint, plus half of the heat reclaim dead band.
In the dead band the function remains in its active mode. The
default value of the dead band is 4.4°C. This value can be
modified by Carrier Service.
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
83 for circuit A (alarm 84 for circuit B) will be activated.
• As soon as the saturated condensing temperature reaches
30°C and the superheat reaches 8.3 K, 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
pump-down threshold, the pumpdown valve is closed and
the heat reclaim function is effective.
Item 17 and 18 of the INFORMATION menu permits consulting
different heat reclaim function sequences:
17 = sequence of circuit A
18 = sequence of circuit B
0 = cooling mode
1 = heat reclaim mode selection
2 = pumpdown sequence
3 = effective heat reclaim mode
4 = pumpdown fault*
5 = water flow switch fault*
*
30
Alarm 83 for circuit A or 84 for circuit B is activated. Consulting the items 17
and 18 gives cause as (4) or (5). Resetting of the alarms re-initialises the
information.
6 - DIAGNOSTICS - TROUBLESHOOTING
6.3 - Resetting alarms
6.1 - General
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.
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.
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).
ITEM NUMBER ITEM VALUE
PRESS MENU
2-DIGIT DISPLAY 4-DIGIT DISPLAYBUTTON 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 dis-
played for 2 seconds
then, “2 ALArM” and
then, “no ALArM”.
Good
then, 2 AL
then, no ALArM
31
6.4 - Alarm codes
The following list gives a complete description of each alarm code and its possible cause.
Alarm
code
Description
Why was this alarm
generated?
Action taken by the control
Reset type
Probable cause
1
Evaporator entering fluid thermistor failure
Thermistor outside range
-40 to 118°C
Unit shut down
Auto, if the temperature
measured by the sensor
becomes normal again
Thermistor or wiring fault or
cable/wire damaged
2
Evaporator leaving fluid thermistor failure
Ditto
Unit shut down
Ditto
Ditto
3
Condenser entering fluid thermistor failure
Ditto
None, simple message
Ditto
Ditto
4
Condenser leaving fluid thermistor failure
Ditto
None in cooling mode
Ditto
Unit shut down in heating mode
Ditto
5
Condenser entering fluid thermistor failure
Ditto
None, simple message
Ditto
Ditto
6
Condenser leaving fluid thermistor failure
Ditto
None
Ditto
Ditto
7
Outdoor temperature sensor fault
Ditto
Reset based on deactivated
outdoor sensor
Ditto
Ditto
8
CHWS (master/slave) fluid thermistor fault
Ditto
Master/slave function
deactivated
Ditto
Ditto
9
Compressor A1, discharge gas sensor
Ditto
Compressor A1 shut down
Ditto
Thermistor, solenoid, motor
cooling or wiring fault
10
Compressor A2, discharge gas sensor
Ditto
Compressor A2 shut down
Ditto
Ditto
11
Compressor B1, discharge gas sensor
Ditto
Compressor B1 shut down
Ditto
Ditto
12
Compressor B2, discharge gas sensor
Ditto
Compressor B2 shut down
Ditto
Ditto
13
External 0-10 V dc signal fault
Signal outside range
1- Loadshed: not used
2- Demand limit: deactivated
Ditto
Defective input or wiring fault
14
Discharge pressure transducer failure,
circuit A
Measured signal = 0 V dc
Circuit A shut down
Ditto
Defective transducer, wiring fault
15
Discharge pressure transducer failure,
circuit B
Ditto
Circuit B shut down
Ditto
Ditto
16
Suction pressure transducer failure, crt A
Ditto
Circuit A shut down
Ditto
Ditto
17
Suction pressure transducer failure, crt B
Ditto
Circuit B shut down
Ditto
Ditto
18
Oil pressure transducer failure, compr A1
Ditto
Compressor A1 shut down
Ditto
Ditto
19
Oil pressure transducer failure, compr A2
Ditto
Compressor A2 shut down
Ditto
Ditto
20
Oil pressure transducer failure, compr B1
Ditto
Compressor B1 shut down
Ditto
Ditto
21
Oil pressure transducer failure, compr B2
Ditto
Compressor B2 shut down
Ditto
Ditto
22
Economizer A1 transducer failure
Ditto
Circuit A shut down for unit
with economizer. Otherwise
compressor A1 shut down.
Ditto
Ditto
23
Economizer A2 transducer failure
Ditto
Compressor A2 shut down
Ditto
Ditto
24
Economizer B1 transducer failure
Ditto
Circuit B shut down for unit
with economizer. Otherwise
compressor B1 shut down.
Ditto
Ditto
25
Economizer B2 transducer failure
Ditto
Compressor B2 shut down
Ditto
Ditto
26
Pressure sensor failure - coil pump down
circuit A
Ditto
Circuit A remains in cooling
mode
Ditto
Ditto
27
Pressure sensor failure - coil pump down
circuit B
Ditto
Circuit B remains in cooling
mode
Ditto
Ditto
28
Fault in the motor cooling valve position
sensor, circuit A
Ditto
None
Ditto
Ditto
29
Fault in the motor cooling valve position
sensor, circuit B
Ditto
None
Ditto
Ditto
30
Loss of communication with SCPM A1
board
SCPM A1 board does not
respond
Compressor A1 shut down
Ditto
Wiring fault, incorrect address or
defective board
31
Loss of communication with SCPM A2
board
SCPM A2 board does not
respond
Compressor A2 shut down
Ditto
Ditto
32
Loss of communication with SCPM B1
board
SCPM B1 board does not
respond
Compressor B1 shut down
Ditto
Ditto
33
Loss of communication with SCPM B2
board
SCPM B2 board does not
respond
Compressor B2 shut down
Ditto
Ditto
34
Loss of communication with EXV board
4xDO board associated with Unit shut down
the EXV does not respond
Ditto
Ditto
35
Loss of communication with fan board #1
4xDO board controlling the
first four fan stages does
not respond
Unit shut down if number of fan
stages by circuit is lower than
three. Otherwise circuit A shut
down.
Ditto
Ditto
36
Loss of communication with fan board # 2
4xDO board controlling the
fan stages of circuit B does
not respond
Circuit B shut down
Ditto
Ditto
37
Loss of communication with auxiliary
board type 1
Board does not respond
Unit shut down if heating mode
has been selected.
Automatic
Bus wiring fault, incorrect
address or defective board
38
Loss of communication with heat reclaim
or
evaporator heater board
Analogue board does not
respond
Unit shut down if heat reclaim
mode is selected.
Automatic if board is
again detected
Auxiliary board faulty
Faulty connection
39
‘CCN/clock board’ fault
CCN/clock board is no
longer detected
Unit shut down
Ditto
Defective CCN/clock board
40**
Control box thermostat fault or phase
reversal
Sensor overheated
Unit shut down
Auto if the same alarm
Badly ventilated control box
has not tripped the same
day
32
Alarm Description
code
Why was this alarm
generated?
Action taken by the control
Reset type
Probable cause
41
Unit emergency stop
CCN command to stop the unit
received
Unit shut down
CCN/Automatic
Control network
42
Initial factory configuration required
All factory parameters are 0
Unit cannot start
Auto
No factory configuration
43-n
43-1
43-2
Illegal initial factory configuration
Compr A capacity too high
Compr B2 configured and compressor
B1 absent
Fan configured for a water-cooled
condenser
Fans not configured
Heat reclaim option configured and
reclaim sensors configured
Bad factory configuration
Ditto
Ditto
Factory configuration error
44
Discharge pressure circuit A too high
SCT>loadshed threshold. Max.
satur. condensing pressure
(mct_sp) if only one capacity
stage remains in operation
Circuit A shut down
Auto in the 10mn that
follow
Transducer/high pressure switch
or fan circuit defective, water flow
obstructed in the condenser,
water entering temperature or
condenser air too high
45
Discharge pressure circuit B too high
SCT>loadshed threshold. Max.
satur. condensing pressure
(mct_sp) if only one capacity
stage remains in operation
Circuit B shut down
Ditto
Ditto
46
Oil solenoid failure, compressor A1
Oil pressure differential >17kPa
during the period following
pump start-up and before
opening of the oil solenoid (see
prelubrication)
Compressor A1 not authorised Auto if the same alarm
Oil valve defective
to start
has not tripped the same
day
47
Oil solenoid failure, compressor A2
Ditto
Compressor A2 not authorised Ditto
to start
Ditto
48
Oil solenoid failure, compressor B1
Ditto
Compressor B1 not authorised Ditto
to start
Ditto
49
Oil solenoid failure, compressor B2
Ditto
Compressor B2 not authorised Ditto
to start
Ditto
50
Pre-start oil pressure, compressor A1
Oil pump does not sufficiently
increase the pressure during
several prelubrication cycles
Compressor A1cannot start
Ditto
Low oil level, oil pump, oil
solenoid or oil transducer failure
51
Pre-start oil pressure, compressor A2
Oil pump does not sufficiently
increase the pressure during
several prelubrication cycles
Compressor A2 cannot start
Ditto
Ditto
52
Pre-start oil pressure, compressor B1
Oil pump does not sufficiently
increase the pressure during
several prelubrication cycles
Compressor B1 cannot start
Ditto
Ditto
53
Pre-start oil pressure, compressor B2
Oil pump does not sufficiently
increase the pressure during
several prelubrication cycles
Compressor B2 cannot start
Ditto
Ditto
54
Oil level circuit A low
Oil level control contact open
during operation
Circuit A shut down
Manual
Oil level detector defective, oil
quantity insufficient
55
Oil level circuit B low
Oil level control contact open
during operation
Circuit B shut down
Manual
Ditto
56
Low saturated suction temp, circuit A
SST under defrost theshold* for
3 minutes
Circuit A shut down
Auto if the same alarm
Low refrigerant charge, filter drier
has not tripped the same obstructed, expansion valve and
day
transducer defective, low water
flow, low evaporator water
temperature
57
Low saturated suction temp, circuit B
SST under defrost threshold* for Circuit B shut down
3 minutes
Ditto
Ditto
58
High saturated suction temp, circuit A
After 90 seconds of operation if
SST > 12.8°C & EXV < 1%
Circuit A shut down
Manual
Expansion valve, liquid level
sensor or transducer defective,
high evaporator temp.
59
High saturated suction temp, circuit B
After 90 seconds of operation if
SST > 12.8°C & EXV < 1%
Circuit B shut down
Manual
Ditto
60
Low discharge superheat, circuit A
Superheat <2.8 K for 10 minutes Circuit A shut down
Auto if the same alarm
Thermistor, transducer, EXV or
has not tripped the same economizer defective
day
61
Low discharge superheat, circuit B
Superheat <2.8 K for 10 minutes Circuit B shut down
Ditto
Ditto
62
Max. oil pressure difference,
compressor A1
(Discharge pressure - oil
pressure) >340 kPa for more
than 6 seconds
Compressor A1 shut down
Manual
Obstructed oil filter, oil solenoid or
shut-off valve blocked, or manual
oil valve closed
63
Max. oil pressure difference,
compressor A2
(Discharge pressure - oil
pressure) >340 kPa for more
than 6 seconds
Compressor A2 shut down
Manual
Ditto
64
Max. oil pressure difference,
compressor B1
(Discharge pressure - oil
pressure) >340 kPa for more
than 6 seconds
Compressor B1 shut down
Manual
Ditto
65
Max. oil pressure difference,
compressor B2
(Discharge pressure - oil
pressure) >340 kPa for more
than 6 seconds
Compressor B2 shut down
Manual
Ditto
66
Loss of commuincation with System
Manager
The unit is controlled by a
Unit returns to autonomous
System Manager (Flotronic or
operating mode
Chiller) and communication with
this module is lost for more than
two minutes
Auto
Defective CCN BUS wiring or
system module failure
67
Loss of communication with master or
slave unit
The master/slave link is broken
due to a loss of communication
between the two units for more
than 2 minutes
Auto
Defective CCN BUS wiring or loss
of supply
43-3
43-4
43-5
Unit returns to autonomous
operating mode
33
Alarm Description
code
Why was this alarm
generated?
Action taken by the control
Reset type
68
Low oil pressure compr A1
Oil pressure differential below
the setpoint (dynamically
calculated) for 15 seconds
Compressor A1 shut down
Auto if the same alarm
Low condenser air or water
has not tripped the same temperature, oil filters obstructed,
day
oil valve blocked, oil solenoid and
oil pressure transducer defective
69
Low oil pressure compr A2
Oil pressure differential below
the setpoint (dynamically
calculated) for 15 seconds
Compressor A2 shut down
Ditto
Ditto
70
Low oil pressure compr B1
Oil pressure differential below
oil setpoints 1 or 2 (see alert
criteria for low oil pressure and
setpoint)
Compressor B1 shut down
Ditto
Ditto
71
Low oil pressure compr B2
Oil pressure differential below
the setpoint (dynamically
calculated) for 15 seconds
Compressor B2 shut down
Auto if the same alarm
Ditto
has not tripped the same
day
72
Evaporator frost protection
1 - Evaporator EWT or LWT
below defrost setpoint
2 - On units equipped with an
evaporator heater, heater
operates for more than 15
minutes but does ot heat the
evaporator
Unit shut down. Evaporator
pump and if applicable heater
start-up, if unit has shut down
air-cooled units)
Ditto
Defective thermistor, low water
flow
73
Condenser frost protection, circuit A
For water-cooled units and fluid
type = water, if SCT<1,1°C
Unit shut down. Condenser
pump start-up, if unit has shut
down
Automatic
Discharge pressure transducer
defective, refrigerant leak or low
condenser water temperature
74
Condenser frost protection, circuit B
For water-cooled units and fluid
type = water, if SCT<1,1°C
Unit shut down. Condenser
pump start-up, if unit has shut
down
Automatic
Ditto
75
Evaporator water flow control failure
1 - Control not closed, before
end of the start-up delay or
open during operation
2 - Pump shut down for 2 mins
and water flow contact closed
Unit shut down. Pump shut
down
Manual
Evaporator pump control or water
flow switch failure
76
Condenser water flow loss
Water flow switch (water-cooled
units) not closed during the
minute after start-up
Unit shut down
Manual
Condenser pump, low water flow,
water flow switch
77
High current, compressor A1
Current higher than threshold
value detected
Compressor A1 shut down
Auto after 10 mn delay
Operation above the compressor
capacity
78
High current, compressor A2
Ditto
Compressor A2 shut down
Ditto
Ditto
79
High current, compressor B1
Ditto
Compressor B1 shut down
Ditto
Ditto
80
High current, compressor B2
Ditto
Compressor B2 shut down
Ditto
Ditto
81
Pump 1 fault
Evaporator water pump contact
open, when the pump has
received a command to run
Unit shut down
Manual
Pump overheat or bad pump
connection
82
Pump 2 fault
Ditto
Ditto
Manual
Ditto
83
Heat reclaim mode fault, circuit A
1. Interlock not closed 1 minute
after condenser pump start-up
or open during heat reclaim
operation
2. More than two consecutive
pumpdown sequences not
successful.
Circuit A remains in cooling
mode
Manual
1. Water flow switch defective.
2. Leak or heat reclaim shutoff or
drain solenoid valve open.
84
Heat reclaim mode fault, circuit B
Ditto
Circuit B remains in cooling
mode
Manual
Ditto
85
Water flow fault, heat reclaim
condenser
Water flow detector (watercooled units) not closed for one
minute
Unit remains in cooling mode
Manual
Ditto
86-nn
Master/slave configuration fault
Bad master/slave configuration
Master/slave control not
allowed
Auto/manual for heating/
cooling mode fault
Master/slave configuration error
87-n
87-1
87-2
87-3
87-4
87-5
87-6
Maintenance alert
Charge too low
Water loop too low
Air filter maintenance delay elapsed
Pump 1 maintenance delay elapsed
Pump 2 maintenance delay elapsed
Water filter maintenance delay elapsed
A maintenance alert is active
None
Manual
34
Probable cause
Alarm
Function
Description
Action
Reset
1xx
Defect compressor A1
See SCPM subcodes below
See SCPM subcodes below
Manual
2xx
Defect compressor A2
See SCPM subcodes below
See SCPM subcodes below
Manual
3xx
Defect compressor B1
See SCPM subcodes below
See SCPM subcodes below
Manual
4xx
Defect compressor B2
See SCPM subcodes below
See SCPM subcodes below
Manual
Note
SCPM subcodes (XX)
Alarm
Function
Description
Action
Reset
Note
01
High motor temperature
SCPM detects high motor temperature, if
temperature is higher than 110°C for 10
seconds
Compressor shut down
Manual
Solenoid, cooling motor
defect, low refrigerant
charge. Wiring, motor
temperature sensor or
SCPM board fault
02
Motor temperature sensor SCPM measures a temperature outside the
-40°C to 118°C temperature range
Ditto
Manual
Thermistor, solenoid,
motor cooling or wiring
fault
03
High pressurestat tripped
Ditto
Manual
Lack of condenser water
flow. Condenser valve
blocked, fan circuit fault,
high condenser entering
air or water temperature
04
High motor current
Ditto
Manual
Operation outside the
compressor capacity.
Configuration block badly
perforated, motor fault
05
Rotor blocked
SCPM detects high current, based on MTA
rating
Ditto
Manual
Load too high
06
Ground current fault
SCPM detects ground current (2.5 +2/- 0
amps)
Ditto
Manual
Ground current fault on
motor winding, wiring fault
07
Current drop in one
phase L1
SCPM measures a current drop > = 65%
Ditto
Manual
Motor fault, wiring fault
08
Current drop in one
phase L2
SCPM measures a current drop > = 65%
Ditto
Manual
Motor fault, wiring fault
09
Current drop in one
phase L3
SCPM measures a current drop > = 65%
Ditto
Manual
Motor fault, wiring fault
10
Current imbalance >14%
SCPM measures a current imbalance
between phases as more than 14% for 25
minutes
None, simple message
Manual, if threshold alarm Loss of power supply,
is validated. Otherwise
wiring fault, loose terminal,
auto reset.
core defective
11
Current imbalance >18%
SCPM measures a current imbalance
between phases of more than 18% for 25
minutes
Compressor shut down,
if threshold alarm is
validated.
Ditto
Poor power supply, loose
terminal, core defective
12
No motor current
SCPM module shows less than 10% of the
MTA for more than 3 seconds
Shut down
Manual
Power supply interrupted,
fuse(s) blown, wiring fault,
core defective
13
Star-delta start-up
Compressor shut down
Manual
Defective connector
14
Contactor failure
Unit shut down
Manual
Defective/blocked
contactor
15
Compressor shut-down
not possible
Circuit shut down
Manual
Contact stuck
16
Current phase reversal
SCPM detects a current phase reversal via
the core
Compressor shut down
Manual
Supply phases or cables
reversed, core wiring
reversed after replacement
17
Configuration block fault
SCPM detects a reading fault at the block
Compressor shut down
Manual
Configuration block on
SCPM board badly
perforated or badly placed.
Defective board.
Legend
*
**
SCPM: FSM: CSM: MTA: HPS port to SCPM module open
SCPM detects 10% of the MTA for 10
seconds after shutdown of the compressor
contactor. Oil solenoid still has supply.
Defrost threshold = 1,1°C for water or for the lowest cooling setpoint less 4,4°C for brine or low brine.
This safety circuit is controlled by two contacts, 16A and 16B, which are connected in series internally. If there is only a single control box there is a jumper
on 16B, otherwise 16B controls the control box safety of the circuit. If one of the two contacts 16A and 16B is open, the whole unit is in fault status.
Compressor protection module
Flotronic System ManagerTM
Chiller System Manager
Compressor Must Trip Amperes
35
Order No. 13054-76, 09.2007. Supersedes order No.: 13054-76, 04.2002
Manufacturer reserves the right to change any product specifications without notice.
Manufactured by: Carrier SCS, Montluel, France.
Printed in the Netherlands.