ir33 platform
ir33
ir33 power
ir33 DIN
powercompact
powercompact small
mastercella
User manual
User manual
ENGLISH
IMPORTANT WARNINGS
CAREL bases the development of its products on decades of experience in HVAC, on the continuous investments in technological
innovations to products, procedures and strict quality processes with
in-circuit and functional testing on 100% of its products, and on the most innovative production
technology available on the market.
CAREL and its subsidiaries nonetheless cannot guarantee that all the aspects of the product and the software included with
the product respond to the requirements of the final application, despite the
product being developed according to start-of-the-art techniques. The customer (manufacturer, developer or installer of the
final equipment) accepts all liability and risk relating to the configuration of the product in order to reach the expected results
in relation to the specific final installation and/or equipment. CAREL may, based on specific agreements, acts as a consultant
for the positive
commissioning of the final unit/application, however in no case does it accept liability for the correct operation of the final
equipment/system.
The CAREL product is a state-of-the-art product, whose operation is specified in the technical
documentation supplied with the product or can be downloaded, even prior to purchase, from the website www.carel.com.
Each CAREL product, in relation to its advanced level of technology, requires setup/configuration/
programming/commissioning to be able to operate in the best possible way for the specific application. The failure to complete
such operations, which are required/indicated in the user manual, may cause the final product to malfunction; CAREL accepts
no liability in such cases.
Only qualified personnel may install or carry out technical service on the product.
The customer must only use the product in the manner described in the documentation relating to the product.
In addition to observing any further warnings described in this manual, the following warnings must be heeded for all CAREL
products:
• Prevent the electronic circuits from getting wet. Rain, humidity and all types of liquids or condensate contain corrosive
minerals that may damage the electronic circuits. In any case, the product should be used or stored in environments that
comply with the temperature and humidity limits specified in the manual.
• Do not install the device in particularly hot environments. Too high temperatures may reduce the
life of electronic devices, damage them and deform or melt the plastic parts. In any case, the product
should be used or stored in environments that comply with the temperature and humidity limits
specified in the manual.
• Do not attempt to open the device in any way other than described in the manual.
• Do not drop, hit or shake the device, as the internal circuits and mechanisms may be irreparably
damaged.
• Do not use corrosive chemicals, solvents or aggressive detergents to clean the device.
• Do not use the product for applications other than those specified in the technical manual.
All of the above suggestions likewise apply to the controllers, serial boards, programming keys or any other accessory in the
CAREL product portfolio.
CAREL adopts a policy of continual development. Consequently, CAREL reserves the right to make changes and improvements
to any product described in this document without prior warning.
The technical specifications shown in the manual may be changed without prior warning.
The liability of CAREL in relation to its products is specified in the CAREL general contract conditions, available on the website
www.carel.com and/or by specific agreements with customers; specifically, to the extent where allowed by applicable legislation, in no case will CAREL, its employees or subsidiaries be liable for any lost earnings or sales, losses of data and information,
costs of replacement goods or services, damage to things or people, downtime or any direct, indirect, incidental, actual, punitive,
exemplary, special or consequential damage of any kind whatsoever, whether contractual,
extra-contractual or due to negligence, or any other liabilities deriving from the installation, use or impossibility to use the
product, even if CAREL or its subsidiaries are warned of the possibility of such damage.
Disposing of the parts of the controller:
The controller is made up of metal and plastic parts and a lithium battery. All these parts must be disposed
of separately in compliance with the local standards in force on waste disposal.
1. INTRODUCTION
ENGLISH
Content
7
1.1 Main features ............................................................................................................................................................. 7
2.1 Display ........................................................................................................................................................................ 9
2. USER INTERFACE
9
2.2 ir33, ir33 power and ir33DIN keypad ........................................................................................................................ 10
3. INSTALLATION
12
4. PROGRAMMING THE INSTRUMENTS
13
4.1 Modifying the parameters ......................................................................................................................................... 13
4.2 Storing the new values assigned to the parameters................................................................................................. 13
4.3 Classification of the parameters ................................................................................................................................ 13
4.4 Displaying and setting the set point.......................................................................................................................... 14
4.5 Alarms with manual reset ......................................................................................................................................... 14
4.6 Procedure for setting the default parameter values.................................................................................................. 14
4.7 Downloading the parameters via the network ......................................................................................................... 14
4.8 Semi-automatic serial address assignment procedure ............................................................................................. 14
5.1 Parameter copying key............................................................................................................................................... 15
5. ACCESSORIES
15
5.2 Remote control........................................................................................................................................................... 16
5.3 RS485 serial interface................................................................................................................................................. 17
5.4 Programming kit ....................................................................................................................................................... 17
5.5 Transformers (ir33, power, DIN)................................................................................................................................. 17
5.6 RS485 serial board (DIN) ........................................................................................................................................... 17
5.7 RS485 serial board (MasterCella) .............................................................................................................................. 17
5.8 Door interlock (MasterCella) ...................................................................................................................................... 17
5.9 Terminals (MasterCella) ............................................................................................................................................. 18
5.10 Repeater display interface option............................................................................................................................ 18
5.11 IR00R*0000 display terminal .................................................................................................................................. 18
5.12 PST00VR100 display terminal (powercompact)..................................................................................................... 18
5.13 Optional interface-repeater display connection cable............................................................................................ 18
6. DESCRIPTION OF THE FUNCTIONS
19
6.1 Models........................................................................................................................................................................ 19
6.2 Testing the display and keypad on start-up .............................................................................................................. 19
6.3 Switching the controller ON and OFF ........................................................................................................................ 20
6.4 Auxiliary output management .................................................................................................................................. 21
6.5 Light management .................................................................................................................................................... 21
6.6 Defrost ........................................................................................................................................................................ 21
6.7 New defrost activation modes ................................................................................................................................... 24
6.8 Pump down and low pressure................................................................................................................................... 26
6.9 Continuous cycle ........................................................................................................................................................ 26
6.10 High condensing temperature alarm ...................................................................................................................... 28
6.11 Control with dead band ........................................................................................................................................... 29
6.12 Control with second step ......................................................................................................................................... 30
6.13 Anti-sweat heater function ..................................................................................................................................... 31
6.14 Antifreeze alarm ....................................................................................................................................................... 31
6.15 Special functions for the management of multiplexed cabinets (mpx) ................................................................ 32
6.16 HACCP (Hazard Analysis and Critical Control Point)................................................................................................ 33
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7. DESCRIPTION OF THE OPERATING PARAMETERS
34
7.1 Temperature probe management parameters .......................................................................................................... 34
7.2 Temperature control parameters................................................................................................................................ 36
7.3 Compressor management parameters ...................................................................................................................... 38
7.4 Defrost management parameters ............................................................................................................................. 40
7.5 Alarm management parameters ............................................................................................................................... 43
7.6 Fan management parameters ................................................................................................................................... 50
7.7 General configuration parameters............................................................................................................................. 51
7.8 HACCP alarm management parameters ................................................................................................................... 54
7.9 RTC and timed defrost management parameters ..................................................................................................... 55
7.10 Summary table of operating parameters................................................................................................................ 56
8. ALARMS AND SIGNALS
58
8.1 Summary table of alarms and signals: display, buzzer and relay............................................................................. 58
8.2 Table of alarms and signals: functions enabled/disabled ......................................................................................... 59
ENGLISH
1. INTRODUCTION
The ir33 platform for refrigeration is a complete range of products made up of integrated electronic
microprocessor controllers with LED display, designed especially for the control of stand-alone refrigeration units: These controllers
are especially suitable in applications that require high load switching power, a considerable number of outputs, functions and
control with direct access from the keypad, high front panel IP and, at the same time, a compact shape that significantly reduces
the overall dimensions.
The irr33 range is easy to install and ensures optimisation of production times for the manufacturer in mass production.
Numerous models are available, providing the best solution for each application at the most competitive price.
1.1 Main features
Power supply
Models are available with power supply in the following versions: 12Vac, 12 to 24 Vac/dc (switching), 115 Vac, 230 Vac or 11 to
230 Vac (switching).
All the models, furthermore, feature a low power mode to increase immunity to voltage drops.
When the voltage inside the instrument falls below a certain threshold, the unit switches off the display so as to reduce power
consumption, while still continuing to operate normally: the main relays remain energised and, as soon as the voltage returns to
the normal level, the display comes on again.
LED display
The controller is fitted with a very powerful and aesthetically pleasant display, with 3 digits and decimal point, minus sign and
icons to simplify the reading of the values and the operating status.
Fig. 1.a - ir33, ir33 power
Alarm buzzer
All models are fitted with a buzzer to signal the alarms
Keypad
Keypad with 4 or 8 buttons, depending on the product, with clear indications and direct functions.
Remote control
To simplify the setting and display of the parameters, depending on the model, the instrument can be fitted with an infrared receiver
to allow the use of the new compact remote control: this device can be used on a series of ir33 controllers in the same room, without
problems of interference. In fact, each controller is identified by a different access code.
Duty setting
This function ensures the operation of the compressor even when the control probe (room probe) is faulty. If the probe is disconnected or short-circuited, the compressor is activated at set intervals, with a running time (in minutes) equal to the value assigned
to the duty setting parameter (parameter C4), and a fixed OFF time of 15 minutes.
Fig. 1.b - ir33DIN
Smart defrost
All ir33 series controllers can, as standard, manage the defrost functions in new modes with much more efficient algorithms for
optimising the times (see the paragraph on smart defrosts).
Multifunction input
All the instruments have two digital inputs that can be used in different modes, depending on the value set for the “digital input
configuration” parameters (parameters A4 and A5 for ir33, ir33power, powercompact, powercompact small, + parameter A9
for ir33DIN, powercompact, MasterCella). These inputs can be used to enable/disable the defrost, to manage serious alarms that
require the immediate shut-down of the unit (e.g. high pressure) or delayed shut-down of the unit (e.g. low pressure), or alternatively can be configured to read NTC probes, with parameters /3 and /4 for ir33, ir33power, powercompact, powercompact small,
+ parameter /A5 for ir33DIN, powercompact, MasterCella.
Fig. 1.c - powercompact - powercompact small
Multifunction output
According to the model, the ir33 family can be provided with an additional multi-function output for remote control of the alarm
signal for controlling additional units with ON/OFF activation so as to manage a second compressor, a second evaporator, the
condenser fans, and so on.
Real time clock
The wide range also includes models fitted with built-in real time clock.
Pump down
This function ensures the compressor is stopped only when the evaporator is discharged (see paragraph 6.8 “Pump down and low
pressure”).
Condenser
One of the new characteristics offered by these controllers is the possibility to manage, via an NTC probe input, the condensing
temperature for both the alarms and control functions, using the auxiliary output configured by parameters H1 and H5.
Double evaporator
Two independent evaporators can be managed, connected to the same circuit. The end of defrost temperatures are independent
and can be set by parameters dt1/dt2.
Fig. 1.d - MasterCella
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HACCP
This function, increasingly required in the refrigeration market, is included as standard on all models with clock. This allows the monitoring of
critical points by measuring and recording the temperatures in the event of high temperature alarms or power failures.
Up to 3 high temperature alarms and 3 alarms corresponding to power failures can be saved.
Light management
The ir33 platform has been enhanced by the introduction of the function for managing the light when the door opens, set by
parameter.
Keypad protection
The keypad and the remote control can be disabled to avoid tampering by unauthorised persons, above all in the event when the
controller is installed in an area open to the public.
Continuous cycle
The “continuous cycle” function ensures the operation of the compressor for the time set by the
corresponding parameter. This function is useful when a rapid reduction in the temperature is required.
Serial connection
The entire range has an RS485 serial port for network connection to supervisor or telemaintenance systems using a shielded
twisted pair cable.
ModBus®
As well as the CAREL communication protocol, IR33 can also use Modbus®. The protocol (Modbus®, CAREL) is recognised automatically, the instrument does not need to be configured. In addition, the serial board remains the same.
Index of protection
The gasket inside the front panel and the material used to make the keypad guarantee IP65 protection for the controller on the
front panel.
Installation
The controllers are mounted using the screws at the front, or alternatively using two quick-fit side brackets, with compact
dimensions, made from plastic.
In-circuit testing
The ir33 platform controllers are made using the most advanced SMD technology. All the controllers undergo “IN-CIRCUIT TESTING” to
check electrical operation of all components.
NTC probe
The controllers can manage two types of NTC probes (see parameter “/P”): standard version –50T90°C (NTC0*HP*) or alternatively the model for high temperatures, up to 150°C (enhanced NTC –40T150°C).
Watch dog
This feature prevents the microprocessor from losing control over the unit even in the presence of considerable electromagnetic
disturbance. In the event of abnormal operation, the watchdog function re-establishes the initial operating status.
Not all the competitors fit their products with this safety feature.
Electromagnetic compatibility
The ir33 platform is compliant with EU standards on electromagnetic compatibility. The quality and the safety of the ir33 controllers are ensured by the CAREL ISO 9001 certified design and production system and by the CE mark on the product.
Network functions
The controllers feature management of multiplexed defrosts, remote alarm signals and the downloading of the parameters via the
local network.
Parameter selection
Selection of the parameters on the display simplified by the use of icons or with the standard Carel procedure.
Configuration of the digital inputs
The digital inputs can be configured and used as NTC probe inputs, by simply setting a parameter.
Connectors
Models fitted with spade connectors, fixed or plug-in screw terminals.
Options
• programming key;
• RS485 serial interface can be added at any time;
• optional repeater display for models with switching power supply.
For further information, see the chapter on “Accessories”.
Number of relays
ir33
ir33power
ir33DIN
powercompact
powercompact small
masterCella
8
Number of relays
from 1 to 4
from 1 to 4
from 1 to 5
from 2 to 5
from 2 to 4
from 3 to 5
Compressor
8 A and 16 A
2 Hp
16 A and 2 Hp
8A, 16 A and 2 Hp
2 Hp
30 A
Light
72 A (2 Hp)
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2. USER INTERFACE
2.1 Display
ir33, ir33 DIN, ir33 power,
powercompact, powercompact small
MasterCella
Fig. 2.a
ICON
FUNCTION
DESCRIPTION
Normal operation
OFF
ON
COMPRESSOR
ON when the compressor starts. Flashes when the activation of the
compressor is delayed by safety times.
FAN
Compressor off
Awaiting activation
ON when the fan starts.Flashes when the activation of the fan is prevented Fan on
due to external disabling or procedures in progress.
Fan off
Awaiting activation
DEFROST
ON when the defrost is activated. Flashes when the activation of the defrost Defrost in progress
is prevented due to external disabling or procedures in progress.
Defrost not in progress
Awaiting activation
AUX
Flashes if the anti-sweat heater function is active, ON when the auxiliary
output (1 and/or 2) selected as AUX (or LIGHT in firmware version 3.6) is
activated.
AUX auxiliary output active(version
3.6 light auxiliary output active)
AUX auxiliary output not
active
Anti-sweat heater function active
ALARM
ON following pre-activation of the delayed external digital input alarm.
Flashes in the event of alarms during normal operation (e.g. high/low
temperature) or in the event of alarms from an immediate or delayed
external digital input.
Delayed external alarm (before the
time ‘A7’ elapses)
No alarm present
Alarms in norm. operation (e.g. High/low
temperature) or immediate or delayed
alarm from external digital input
CLOCK
ON if at least one timed defrost has been set.At start-up, comes ON for a few
seconds to indicate that the Real Time Clock is fitted.
If at least 1 timed defrost event has
been set
No timed defrost event set
Alarm clock
LIGHT
Flashes if the anti-sweat heater function is active, ON when the auxiliary
Light auxiliary output on(version 3.6
output (1 and/or 2) selected as LIGHT is activated (in firmware version 3.6 dead band auxiliary output active)
it does not flash in anti-sweat heater mode and comes on when the dead
band output is active).
Light auxiliary output off
Anti-sweat heater function active(version
3.6 does not flash in anti-sweat heater
mode)
SERVICE
Flashes in the event of malfunctions, for example E2PROM errors or probe
faults.
No malfunction
Malfunction (e.g. E2PROM error or probe
fault). Contact service
HACCP
ON if the HACCP function is enabled.Flashes when there are new HACCP
alarms stored (HA and/or HF alarm shown on the display).
CONTINUOUS CYCLE ON when the CONTINUOUS CYCLE function is activated. Flashes if the activation of the function is prevented due to external disabling or procedures
in progress (E.g.: minimum compressor OFF time).
DISPLAY
Compressor on
Start up
BLINK
HACCP function enabled
HACCP function not enabled HACCP alarm saved (HA and/or HF)
CONTINUOUS CYCLE operation
activated
CONTINUOUS CYCLE function CONTINUOUS CYCLE operation requested
not activated
ON if real-time
clock present
Shows temperature in range -50 to +150°C.
The temperature is displayed with resolution to the tenths between –19.9
and + 19.9 °C.
The display of the tenths can be disabled by setting a parameter.
Tab. 2.a
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2.2 ir33, ir33 power and ir33DIN keypad
4
6
6
8
4
7
8
7
ir33 DIN
ir33, ir33 power
Fig. 2.b
Icon
Normal operation
pressing the button alone
Start up
Automatic address assignment
request
pressing together with other buttons
If pressed for more than 5 seconds, accesses the menu PRG+SET: if pressed together for more than 5 seconds, accesses the If pressed for more than 5 seconds If pressed for more than 1 second,
for setting the type “F” parameters (frequent).Mutes the menu for setting the type “C” parameters (configuration) or downloa- at start-up, activates the procedure starts the automatic serial address
audible alarm (buzzer) and deactivates the alarm relay ding the parameters.PRG+UP/AUX: if pressed for more than 5s, resets for restoring the default parameters assignment procedure
any alarms with manual reset
PRG/MUTE
aux
If pressed for more than 1 s, activates deactivates the
auxiliary output.
UP/AUX+DOWN/DEF: if pressed together for more than 5 seconds,
activates/deactivates continuous cycle operation.UP/AUX +SET: if
pressed together for more than 5 seconds, starts the report printing
procedure (if the controller is connected to the printer interface).UP/
AUX +PRG/MUTE: if pressed together for more than 5 seconds, resets
any active alarms with manual reset.
If pressed for more than 5 seconds activates a manual
defrost
DOWN/DEF +UP/AUX: if pressed together for more than 5 seconds
activates/deactivates continuous cycle operation.DOWN/DEF +SET: if
pressed together for more than 5 seconds, displays a sub-menu used
to access the parameters relating to the HACCP alarms (‘HA’, ’HAn’,
’HF’, ’HFn’).
If pressed for more than 1 second, displays and/or sets
the set point.
SET+PRG/MUTE: if pressed together for more than 5 seconds accesses
the menu for setting the type “C” parameters (configuration) or downloading the parameters.SET+DOWN/DEF: if pressed together for more
than 5 seconds, displays a sub-menu used to access the parameters
relating to the HACCP alarms (‘HA’, ’HAn’, ’HF’, ’HFn’).SET+UP/AUX: if
pressed together for more than 5 seconds, starts the report printing
procedure (if the controller is connected to the printer interface).
UP/AUX
def
DOWN/DEF
Set
SET
Tab. 2.b
Procedure for displaying and deleting the HACCP alarms
Press +SET for more than one second;
the display will show the name of the first of the parameters of the HA and HF alarms;
use the + buttons to display the codes relating to the HA and HF alarms;
when having reached the desired parameter press SET to display the value;
if the selected parameter is HA or HF, use + to scroll the year, month, day, hour, minutes and duration of the last HA or HF alarm activated.
e.g.: y03 M07 d22 h23 m57 t99 start again…
The sequence indicates that the last HA or HF alarm was activated on 22 July 2003 at 23:57 and lasted 99 hours.
Press SET again to return to the list of the parameters relating to the HA and HF alarms.
6. To return to “Normal operation” at any time, press PRG for 3 s or wait for the session to expire after the timeout (60 s).
1.
2.
3.
4.
5.
The following operations are possible from inside the menu:
a. delete the HACCP alarm by pressing +SET for more than 5 seconds (the message rES indicates that the alarm has been deleted, the HACCP LED stops flashing, the HA and/or HF signal is also reset, and the
monitoring of HA is reinitialised);
b. delete the HACCP alarms and the alarms saved (HAn, HA, HA1, HA2, HFn, HF, HF1, HF2) by pressing , SET and  for more than 5 seconds (the message rES indicates that the alarms have been deleted, the
HACCP LED stops flashing, the HA and/or HF signal is reset, the HAn, HA, HA1, HA2, HFn, HF, HF1, HF2 alarms saved are reset and the monitoring of HA is reinitialised)
c. Normal operation can be resumed at any time by pressing the button for 3 seconds or waiting for the expiry of the session due to timeout (60 seconds) without pressing any button.
10
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5
2
1
6
8
4
1
7
MasterCella
2
3
4
5
6
7
ENGLISH
2.3 powercompact, powercompact small and MasterCella keypad
8
powercompact, powercompact small
Fig. 2.c
Icon
Normal operation
pressing the button alone
Start up
Automatic address
assignment request
pressing together with other buttons
Enters the menu to display and delete of the HACCP
alarms
HACCP
If pressed for more than 5 seconds, switches the
unit on/off
ON/OFF
PRG/MUTE
UP/CC
If pressed for more than 5 seconds accesses the
menu for setting the type “F” parameters (frequent)
In the event of alarms: mutes the audible alarm
(buzzer) and deactivates the alarm relay
PRG/MUTE+SET: if pressed for more than 5 seconds accesses the menu for setting the type “C” parameters (configuration) or downloading the parameters.
PRG/MUTE+UP/CC: if pressed for more than 5 seconds, resets any alarms with
manual reset
If pressed for more than 5
seconds at start-up, activates
the procedure for restoring the
default parameters
If pressed for more than 1 second,
starts the automatic serial address
assignment procedure
If pressed for more than 5 seconds activates/deacti- UP/CC+SET: if pressed together for more than 5 seconds starts the report
vates the continuous cycle
printing procedure (if the interface printer is connected to the controller)UP/
CC+PRG/MUTE: if pressed together for more than 5 seconds, resets the any
alarms with manual reset
If pressed for more than 1 second, activates/deactivates auxiliary output 2
LUCE
If pressed for more than 1 second, activates/deactivates auxiliary output 1
AUX
If pressed for more than 5 seconds activates/deactivates a manual defrost.
DOWN/DEF
If pressed for more than 1 second, displays and/or
sets the set point.
SET
SET+PRG/MUTE: if pressed for more than 5 seconds accesses the menu for
setting the type “C” parameters (configuration) or downloading the parameters.SET+UP/CC: if pressed together for more than 5 seconds starts the report
printing procedure (if the interface printer is connected to the controller).
Tab. 2.c
Procedure for displaying and deleting the HACCP alarms
1. Press the HACCP button (powercompact, powercompact small and MasterCella) or alternatively
+SET for ir33, ir33power and ir33DIN for more than one second; the display will show the name of the first of the parameters of the HA and HF alarms.
2. use the and buttons to display the codes relating to the HA and HF alarms;
3. when having reached the desired parameter press SET to display the value;
4. if the selected parameter is HA or HF, use and to scroll the year, month, day, hour, minutes and duration of the last HA or HF alarm activated. Example: y03  M07 down d22 h23  m57 t99
start again…The sequence indicates that the last HA or HF alarm was activated on 22 July 2003 at 23:57 and lasted 99 hours.
5. Press SET again to return to the list of the parameters relating to the HA and HF alarms.
The following operations are possible from inside the menu:
delete the HACCP alarm by pressing the HACCP button (for powercompact and small, MasterCella), or +SET (ir33, ir33power and ir33DIN) for more than 1 second. The message ‘rES’ indicates that the alarm has been
deleted (the HACCP LED stops flashing, the HA and/or HF signal is also reset, and the monitoring of HA is reinitialised);
delete the HACCP alarms and the alarms saved (HAn, HA, HA1, HA2, HFn, HF, HF1, HF2) by pressing the HACCP button for more than 5 seconds (the message’ rES’ indicates that the alarms have been deleted, the HACCP LED
stops flashing, the HA and/or HF signal is reset, the HAn, HA, HA1, HA2, HFn, HF, HF1, HF2 alarms saved are reset and the monitoring of HA is reinitialised).
6. Normal operation can be resumed at any time by pressing the PRG button for 3 seconds or waiting for the expiry of the session due to timeout (60 seconds) without pressing any button.
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3. INSTALLATION
To install the controller, proceed as follows, with reference to the connection diagrams shown in the manual on electrical
specifications and connections:
1. connect the probes and power supply: the probes can be installed up to a maximum distance of 10 m from the controller,
using shielded cables with a minimum cross-section of 1mm2. To improve the immunity to disturbance, use probes with
shielded cables (connect only one end of the shield to the earth on the electrical panel).
2. Program the instrument: for more details, see the chapter “Programming the instruments”.
3. Connect the actuators: the actuators should only be connected after having programmed the controller. In this connection,
carefully check the maximum capacities of the relays, indicated in the “technical specifications”.
4. Serial network connection: all ir33 models are fitted with a serial connector for connection to the supervisory network
via the serial interface code IROPZ48500. The secondary winding of the transformers that supply the instruments must not
be earthed. If connection to a transformer with earthed secondary winding is required, an insulating transformer must be
installed in between.
It is necessary to use a transformer for each instrument; a series of instruments can NOT be connected to the same
transformer.
Warnings:
Avoid installing the instrument in environments with the following characteristics:
• relative humidity over 90% non-condensing;
• heavy vibrations or knocks;
• exposure to continuous jets of water;
• exposure to aggressive and polluting atmospheric agents (e.g.: sulphur and ammonia gases, saline mist, smoke) which may
cause corrosion and/or oxidation;
• high magnetic and/or radio frequency interference (e.g. near transmitting antennas);
• exposure to direct sunlight and atmospheric agents in general.
The following warnings must be observed when connecting the controllers:
• Incorrect connection of the power supply may seriously damage the system;
• use cable ends that are suitable for the terminals. Loosen every screw and fit the cable end, next tighten the screws and gently
pull the cables to check their tightness. When tightening the screws, do not use automatic screwdrivers, or adjust the screws to
a tightening torque less than 50 Ncm;
• separate as much as possible (by at least 3 cm) the probe signal and digital input cables from inductive loads and power cables,
to avoid any electromagnetic disturbance. Never lay power cables and probe cables in the same cable conduits (including those
for the electrical panels). Do not install the probe cables in the immediate vicinity of power devices (contactors, circuit breakers
or the like). Reduce the length of the sensor cables as much as possible, and avoid spirals around power devices;
• only use IP67 guaranteed probes as end defrost probes; place the probes with the vertical bulb upwards, so as to facilitate drainage of any condensate. Remember that the thermistor temperature probes (NTC) have no polarity, so the order of connection
of the ends is not important.
Cleaning the instrument
When cleaning the instrument do not use ethanol, hydrocarbons (petrol), ammonia and by-products.
Use neutral detergents and water.
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4. PROGRAMMING THE INSTRUMENTS
The operating parameters can be modified using the front keypad, and are divided into two families: frequent use parameters
(type “F”) and configuration parameters (type “C”). Access to the configuration parameters is protected by a password that
prevents unwanted modifications or access by unauthorised persons.
How to access type “F” parameters (frequent use):
press PRG for more than 5 seconds (if an alarm is active, the buzzer is muted first of all), the display shows the code of the first
modifiable type “F” parameter.
How to access type “C” parameters (configuration):
1. Press PRG and SET together for more than 5 seconds; the display will show the number “00”,
representing the password prompt;
2. press or until displaying the number “22” (the code of the password allows access to the parameters);
3. confirm by pressing SET; the display will show the code of the first modifiable type “C” parameter.
4.1 Modifying the parameters
After having displayed the parameter, either type “C” or type “F”, proceed as follows:
1. press or suntil reaching the parameter to be modified. When scrolling, an icon appears on the display representing the
category the parameter belongs to. Alternatively, press PRG to display the menu of parameter categories, which is used to
quickly access the family of parameters to be modified;
2. scroll the menu with the and buttons; the display shows the codes of the various categories of parameters (see the
“Summary of operating parameters”), accompanied by the display of the corresponding icon (if present);
3. when having reached the desired category, press SET to move directly to the first parameter in the category (if there are no
visible parameters in the selected category, pressing SET will have no effect);
4. at this stage, continue to scroll the parameters, or return to the categories menu by pressing PRG;
5. press SET to display the value associated with the parameter;
6. increase or decrease the value using the or button respectively;
7. press SET to temporarily save the new value and return to the display of the parameter code. Repeat the operations from
point 1 or point 2;
8. if the parameter has sub-parameters, press SET to display the first sub-parameter;
9. press or to display all the sub-parameters;
10. press SET to display the associated value;
11. increase or decrease the value using theor button respectively;
12. press SET to temporarily save the new value and return to the display of the sub-parameter code;
13. press PRG to return to the display of the parent parameter.
Note: the controller features unit parameters that cannot be displayed and modified on the user interface, and operating
parameters. The latter can be selected as frequent use (F), configuration (C) or not visible on the user interface. To modify the unit
parameters and the visibility of the operating parameters, use the programming key code PS0PZKEY00/A0, IR0PZKEY00/A0 and
the IR0PZPRG00 or VPMSTDKY10/20 tool.
4.2 Storing the new values assigned to the parameters
To definitively store the new values of the modified parameters, press PRG for more than 5 seconds, thus exiting the parameter
setting procedure. All the modifications made to the parameters, temporarily stored in the RAM, can be cancelled and “normal
operation” resumed by not pressing any button for 60 seconds, thus allowing the parameter setting session to expire due to
timeout. Important: if the programming session ends by timeout, the clock parameters will not be reset, as these parameters are
saved immediately when entered.
If the instrument is switched off before pressing PRG, all the modifications made to the parameters and temporarily saved will be
lost.
4.3 Classification of the parameters
The parameters, as well as being divided by TYPE, are also grouped into logical CATEGORIES identified by the initial letters or
symbols. The following table lists the categories and the corresponding letters.
Parameters
/
Category
Text
Temperature probe management parameters
Pro
r
Temperature control parameters
CtL
c
Compressor safety time and activation parameters
CMP
d
Defrost management parameters
dEF
A
Alarm management parameters
ALM
F
Fan management parameters
Fan
General configuration parameters (addresses, enabling, etc.…)
CnF
HACCP parameters
HcP
RTC parameters
rtc
H configuration
H haccp
rtc
Icon
Tab. 4.a
ir33 +030220441 - rel. 2.5 - 16.06.10
13
4.4 Displaying and setting the set point
ENGLISH
1. Press SET for more than 1 second to display the set point;
2. increase or decrease the set point using the or buttons respectively, until reaching the desired value;
3. press SET again to confirm the new value.
4.5 Alarms with manual reset
The alarms with manual reset can be reset by pressing PRG and  ptogether for more than 5 seconds, if the causes are no longer
present.
4.6 Procedure for setting the default parameter values
To set the default parameter values, if ‘Hdn’= 0, proceed as follows:
1. switch the instrument off ;
2. switch the instrument on again, holding the PRG button until the message “_Std_” is shown on the display.
Note: the default values are set only for the visible parameters (e.g. C or F), according to the model; see the table of “Operating
parameters”.
If ‘Hdn’<> 0, a number of sets of customised default parameters are available. Proceed as follows to select these:
1. switch the instrument off ;
2. switch the instrument on again, holding PRG until the value ‘0’ is displayed;
3. use and to select the desired set of custom default parameters.
The sets between 1 and ‘Hdn’ can be chosen; setting 0 selects the default parameters as in the case described previously for
‘Hdn’ = 0;
4. pressing the button shows the message “Std” on the display.
Set
0
Customisable
NO
Note
The levels of visibility are not modified. Used to set the values of the visible parameters only.
1, 2, 3
4, 5, 6
YES
Sets the levels of visibility and the values of all the operating parameters. The unit parameters
are not set.
Tab. 4.b
Note:
• The set of customisable default parameters can only be used on the controller if there is suitable
hardware (expanded EEPROM memory);
• if when loading a set of customised default parameters there is an EF EEPROM error (memory error on the controller), the previous
parameters can be restored by switching the instrument off and on again;
• if there is an ‘EF’ EEPROM error, to maintain the loaded parameters, enter parameter configuration mode, check the values then save
them to the EEPROM using the special procedure. At then end of the operation, the EEPROM error signal will be cancelled;
• if there is a recurring ‘EF’ EEPROM error when loading a set of customised default parameters, the EEPROM on the instrument should
be corrected using the hardware programming key;
• after loading a set of customised default parameter, the controller automatically updates the memory, saving both the levels of
visibility and the values of the parameters;
• ‘Hdn’ must have the same value in all the sets of customised default parameters;
• for greater protection, parameter ‘Hdn’ must be set to not visible.
4.7 Downloading the parameters via the network
1. Press the PRG and SET buttons together for more than 5 seconds; the display will show the number “00”;
2. press theor button to scroll the numbers until displaying “66” (download activation password), then confirm by
pressing SET;
3. the display will show the message “dnL”, indicating that the download is in progress;
4. at the end of the procedure, the message “dnL” is cancelled and, in the event of errors, one of the messages d1 to d6 is displayed to
indicate which unit the error occurred on.
4.8 Semi-automatic serial address assignment procedure
The automatic setting of the serial address is a special procedure that, by using an application installed on a PC connected to the CAREL
network (included in the PlantVisor supervision and monitoring software), sets and manages the addresses of all the instruments that
include this feature in a simple way. Using the remote application, start the “Network definition” procedure; the application begins to
send a special message (‘<!ADR>’) across the network, containing the network address. Then:
1. press the PRG button on the keypad of the instrument connected to the network, the instrument recognises the message sent
by the remote application, automatically setting the address to the required value and sending a confirmation message to the
application, containing the unit code and firmware revision (message ‘V’). When the message sent by the remote application is
recognised, the instrument displays the message ‘Add’ for 1 second, followed by the value of the assigned serial address;
2. the application, on receiving the confirmation message from the units connected to the network, saves the information received
in its database, increases the serial address and resumes sending the message ‘<!ADR>‘. The procedure can be repeated
starting from point 2 on another unit connected to the network, until all network addresses are defined.
Note: when the operation for assigning an address to an instrument has finished, for reasons of safety, the operation is inhibited
for 1 minute on that instrument. Consequently, a different address cannot be re-assigned to the instrument during that time.
14
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
5. ACCESSORIES
5.1 Parameter copying key
Programming keys PSOPZKEY00/A0
The programming keys PSOPZKEY00 (Figure 5.a) and PSOPZKEYA0 (Figure 5.b) are used to copy the complete set of parameters
relating to the CAREL ir33 controller parameters, but not the 6 sets of customisable default parameters. The keys must be connected to the connector (4 pin AMP) fitted on the compatible controllers, and work even without switching the controller on.
Programming keys IROPZKEY00/A0
The programming keys IROPZKEY00/A0, unlike the PSOPZKEY00/A0, with the use of the configuration kit PSOPZPRG or VPMSTD,
can set up to seven different configurations of parameters inside the instrument strumento (controller operating parameters and
the 6 sets of customisable default parameters). The keys must be connected to the connector (4 pin AMP) fitted on the controllers.
The keys IROPZKEY00/A0 can only be used with the controllers based on the IR33 platform. All operations can be performed with
the instrument off.
Important:
PJOPZKEY00 to be used ONLY for PJ controllers;
- PSOPZKEY** to be used ONLY for powercompact/ir33, Mastercella, power-split, MGE controllers and I/O modules.
Fig. 5.b
Fig. 5.a
UPLOAD
Three functions are available, and are selected by using the two supplied dipswitches; these can be accessed by removing the
battery cover:
• load the parameters for a controller onto the key (UPLOAD - Fig. 5.c);
• copy from the key to a controller (DOWNLOAD - Fig. 5.d);
• extended copy from the key to a controller (EXTENDED DOWNLOAD - Fig. 5.e).
Warning: the parameters can only be copied between instruments with the same code. The UPLOAD operation can, however,
always be performed.
Fig. 5.c
DOWNLOAD
5.1.1 Copying and downloading the parameters
The following operations are used for the UPLOAD and/or DOWNLOAD or EXTENDED DOWNLOAD functions, simply by changing
the settings of the dipswitches to change the function:
1. open the rear cover on the key and position the 2 dipswitches according to the desired operation;
2. close the rear cover on the key and insert the key in the connector on the controller;
3. press the button and check the LED: red for a few seconds, then green, indicates that the operation was completed correctly.
Other signals or the flashing of the LED indicates that problems have
occurred: refer to the table below;
4. at the end of the operation, release the button, after a few seconds the LED goes OFF;
5. remove the key from the controller.
Fig. 5.d
EXTENDED DOWNLOAD
Fig. 5.e
LED signal
Cause
Meaning and solution
Red LED flashing
Batteries discharged at start copy
The batteries are discharged, the copy operation cannot be performed. Replace the batteries.
Green LED flashing
Batteries discharged during copy or at end of copy
During the copy operation or at the end of the operation the battery level is low. Replace the batteries and repeat the operation.
Red/green LED flashing (orange
signal)
Instrument not compatible
The parameter set-up cannot be copied as the connected controller model is not compatible. This error only occurs for the DOWNLOAD function; check the code of the controller and run the copy only for compatible codes.
Red and green LEDs ON
Error in data being copied
Error in the data being copied. The instrument’s EEPROM is corrupted, and therefore the key cannot be copied.
Red LED on steady
Data transfer error
LEDs OFF
Batteries disconnected
The copy operation was not completed due to a serious error when transferring or copying the data. Repeat the operation, if the problem
persists check the key connections.
Check the batteries.
Tab. 5.a
Note:
1. the DOWNLOAD operation (normal or extended) is possible even if the controller operating and unit parameters are incorrect.
If there is an error in the unit parameters, these will be recovered by the key. Be careful when recovering the unit parameters
from a key, as these determine the low-level operation of the controller (unit model, type of interface, assignment of logical
relay to physical relay, brightness of the display, level of modulation of the relay control signal …).
The unit parameters from the original model must therefore be restored to ensure the correct operation of the controller.
ir33 +030220441 - rel. 2.5 - 16.06.10
15
5.2 Remote control
ENGLISH
The compact remote control with 22 buttons, allows direct access to the following parameters (Fig. 5.f):
• temperature;
• defrost;
• fans;
• alarms;
• HACCP.
The following functions can also be controlled:
• start defrost;
• AUX;
• light;
• ON/OFF;
• mute.
The standard remote control features the four buttons, PRG/mute, SET, UP and DOWN, which access almost all the functions
provided by the instrument keypad. The buttons can be divided into three groups, based on their functions:
• Buttons for enabling and disabling the use of the remote control (Figure 5.g);
• Buttons for remote simulation of the instrument keypad (Figure 5.h);
• Buttons for direct display/modification of the most commonly used parameters (Figure 5.i).
Fig. 5.f
Activating and deactivating the use of the remote control
Button
Immediate function
Delayed function
START
used to enable the remote control; each instrument displays its own
enabling code
EXIT
ends operation using the remote control, cancelling all changes made
to the parameters
PRG
used to display the configuration parameters
NUMBERS
used to select the instrument, by entering the enabling code displayed.
pressing and holding for 5s ends use of
the remote control, saving the modified
parameters.
Tab. 5.b
Fig. 5.g
By pressing the START button , each instrument displays its own remote control enabling code (H3).
The numeric keypad is used to enter the enabling code of the instrument in question. At the end of this operation, only the instrument with the selected enabling code will be programmed from the remote control, all the others will resume normal operation.
Assigning different enabling codes to the instruments, allows, in this phase, only the desired instrument to be programmed using
the remote control, without the risk of interference. The instrument enabled for programming from the remote control will display
the reading and the message rCt. This status is called Level 0.
When having entered programming mode, pressing PRG for 5 seconds exits the programming of the remote control, saving the
modifications; vice-versa, press ESC to exit the programming of the remote control, without saving the modifications
Remote simulation of the instrument keypad
The highlighted part is used to simulate the instrument keypad from the remote control.
In Level 0 (display the reading and message rCt), the following functions are active:
Fig. 5.h
Button
Immediate function
def
aux
light
ON/OFF
PRG/mute
start and stop defrosting
activation and deactivation of auxiliary relay 1
activation and deactivation of auxiliary relay 2
instrument ON/OFF
mute the buzzer, if ON, and deactivate the alarm relay
Tab. 5.c
In this level, the SET and PRG/mute buttons are also active, used to activate the set point (Level 1) and the configuration parameters
(Level 2).
Button
Immediate function
Delayed function
PRG/mute
modify the configuration parameters
pressing and holding for 5s saves the modified
parameters
set
modify the set point
Tab. 5.d
In Levels 1 and Level 2, the PRG/mute, SET, UP and DOWN buttons repeat the corresponding functions on the instrument keypad.
In this way, all the instrument parameters can be displayed and modified, even those without shortcut buttons.
Fig. 5.i
Directly display/modify the most commonly used parameters:
Some parameters, relating to: Temperature, Defrost, Alarms, Fans, HACCP are directly accessible using specific buttons.
16
ir33 +030220441 - rel. 2.5 - 16.06.10
The RS485 serial card option (IROPZ48500), shown in Figure 5.l, allows the ir33 instrument to be connected to the RS485 serial
network for supervision. In addition, the serial interface option IROPZ485S0 is available, with automatic recognition of the polarity
(+ and -).
For further details, refer to the corresponding instruction sheet.
Fig. 5.l
5.4 Programming kit
This accessory interfaces the IROPZKEY00 programming key with any PC; this useful tool can be used to program the key using the
standard instrument parameters, and save the different configurations to files that can be recalled during final programming.
The user can change the password, hide the parameters, change the level of visibility (with password protection or direct access)
and, most importantly, assign the output relays according to the configuration of the utilities.
Fig. 5.m
5.5 Transformers (ir33, power, DIN)
The transformers are used to convert mains voltage to the power supply voltage specified for the ir33 and ir33DIN series controllers. Their compactness and sound design (winding immersed in plastic) mean they can be used in all types of applications.
Code: TRA12VDE00: Transformer, 3VA 240/12VAC VDE - 153/M
5.6 RS485 serial board (DIN)
Fig. 5.n
The IROPZSER30 board is used to connect the ir33DIN via the RS485 network serial to the PlantVisor supervisory system (using the
removable terminal supplied), as well as direct connection of the instrument to the repeater display using a PSTCON**B00 cable.
5.7 RS485 serial board (MasterCella)
Fig. 5.o
The IROPZSEM10/30 boards are used to connect the mastercella via the RS485 network serial to the PlantVisor supervisory system. The IROPZSEM30 board also allows the repeater display to be connected directly to mastercella using a PSTCON**B00 cable.
Codes:
• IROPZSEM10: RS485 serial board;
• IROPZSEM30: RS485 serial board + repeater display connection.
5.8 Door interlock (MasterCella)
Mastercella can be installed with a door interlock disconnecting switch, rated to 32 A, for the complete on/off management of all
the units; this device allows the system to be locked in the “Off” position so that service operations can be performed in complete
safety.
Codes:
• 0402512CEL, 32 A disconnecting switch;
• 0402515CEL, shaft H=85mm;
• 0402517CEL, switch with yellow/red indicator.
Fig. 5.p
Fig. 5.q
ir33 +030220441 - rel. 2.5 - 16.06.10
17
ENGLISH
5.3 RS485 serial interface
5.9 Terminals (MasterCella)
ENGLISH
This accessory is used to group together the neutral, live and earth connections on a single board installed inside the mastercella.
There are two models available: with 3 and 5 rows of terminals. In particular, the second accessory allows direct access with
the cables from the loads (live, neutral and earth) to this board alone, thus avoiding having to make the connections during
installation to the support terminal block on the mastercella.
Codes:
• MDOPZCA000, 3 sets of connections;
• MDOPZCB000, 5 sets of connections.
Fig. 5.r
5.10 Repeater display interface option
The repeater display interface option (IROPZDSP00), shown in the figure below, allows the ir33 to interface with a repeater display
(IR00R*0000) to show the temperature measured by the third probe.
For further details on the connection, refer to the specific instruction sheet.
Fig.
Fig. 5.s
5.s
5.11 IR00R*0000 display terminal
This can be connected in parallel with the interface for setting the parameters. It displays the temperature read by the third probe
installed in the hottest point of the cabinet, as required by the EN 441-13 standard.
Codes:
IR00RG0000 = ir33 green repeater display;
IR00RR0000 = ir33 red repeater display;
IR00XGD000 = ir33 green repeater display
Fig. 5.t
5.12 PST00VR100 display terminal (powercompact)
Same as for the IR00R*0000.
Fig. 5.u
5.13 Optional interface-repeater display connection cable
The connection cables between the interface and the repeater display have the following codes:
for ir33, ir33 power, ir33DIN, powercompact and powercompact small.
• PSTCON01B0 = 1.5 m
• PSTCON03B0 = 3 m
• PSTCON05B0 = 5 m
for MasterCella only:
PSTCON0300: 3 m
PSTCON1000: 10 m
ir33
powercompact
powercompact small
IR00R*0000
PSTCON0**B0
IROPZDSP00
IR00R*0000
ir33 DIN
PSTCON0**B0
IROPZSER30
IROPZSEM30
MasterCella
PSTCON0**00
IR00R*0000
Fig. 5.v
18
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
6. DESCRIPTION OF THE FUNCTIONS
6.1 Models
Below is a list of the functions relating to the various models of controller.
Function
M (*)
S
Y
temperature display
display second probe with external contact
temperature alarm monitoring
compressor control
defrost with compressor stop
defrost with heater or hot gas
continuous cycle
duty setting
evaporator fans
auxiliary output 1
auxiliary output 2


















F









C










H (**)











A (***)










D (***)











Tab. 6.a
(*) = ir33 only
(**) = powercompact and ir33 DIN only
(***) = mastercella only
The controllers can be fitted with a maximum of two auxiliary relays. The associated functions are:
• alarm output, normally open or closed;
• auxiliary output;
• light output;
• second evaporator output;
• control output for pump down valve;
• control output for condenser fans;
• second delayed compressor output,
• auxiliary output, with deactivation when OFF;
• light output, with deactivation when OFF;
• no function associated with the output;
• reverse output in control with dead band;
• second compressor step output;
• second compressor step output with rotation.
The controllers can be fitted with a maximum of three digital inputs (or three probe inputs).
The associated functions are:
• immediate alarm;
• delayed alarm;
• select probe displayed (model M);
• enable defrost;
• start defrost;
• door switch with compressor and fan shutdown and light management;
• remote ON/OFF;
• curtain switch with set point variation and light management;
• low pressure alarm;
• door switch with fan shutdown and light management;
• direct/reverse selection;
• light sensor and light management;
• door switch with compressor and fans off, without light management;
• door switch with fans off, without light management.
The controllers can be fitted with a maximum of five probes (three of which as alternatives to the digital inputs). The associated
functions are:
• ambient probe (used to calculate the virtual control probe);
• product probe (if necessary, used to calculate the virtual control probe);
• defrost probe (main or secondary evaporator, end defrost on 3 evaporator temperature probes);
• condenser probe (used, if necessary, for condenser fan control).
Other functions that enhance the range of the refrigeration controllers include:
• real time clock, for management of real time defrosts;
• real time clock for HACCP alarms management;
• real time clock for the activation/deactivation of the AUX and LIGHT outputs;
• real time clock for the automatic variation of the set point
6.2 Testing the display and keypad on start-up
When the controller is switched on, a special procedure tests the display and the keypad:
Phase
Display
First
Display completely OFF for 2 seconds Press PRG for 2 seconds to set the default
values
Display completely ON for 2 seconds No effect
Three segments (‘---’) on
Pressing each button lights up a specific In this phase,
appears to indicate
segment
the presence of the RTC
Normal operation
Normal operation
Tab. 6.b
Second
Third
Fourth
ir33 +030220441 - rel. 2.5 - 16.06.10
Keypad
Note
19
6.3 Switching the controller ON and OFF
ENGLISH
The unit can be switched ON/OFF from a number of sources; keypad, supervisor and digital input. In this operating mode, the
display will be show the temperature selected for parameter /tI, alternating with the OFF message. The digital input can be used
to switch the controller on/off, setting parameter A4/A5/A9 to “6”. Switching on/off from digital input has priority over the same
function from the supervisor and from the keypad.
Origin
Digital input
Keypad
Supervisor
Priority
Priority 1
Priority 2
Priority 3
Note
Disable On/Off from keypad and supervisor
Tab. 6.c
Important: if there is more than one digital input selected as the On/Off function (A4 and A5 = 6), the ON status will be activated
when all the digital inputs are closed. If event one contact is open, the unit is switched OFF.
OFF status:
Function
Enabled
Disabled






























compressor control (pump down valve OFF and shut)
AUX control (H1= 11) with dead band
second compressor step control with and without rotation (H1= 12, 13)
defrost (cyclical and manual)
fan control
fan control at low relative humidity (if enabled)
continuous cycle
condenser fan control (if enabled)
low temperature alarm (LO, alarm reset, and monitoring initialised)
high temperature alarm (HI, alarm reset, and monitoring initialised)
immediate alarm from external contact (IA, alarm reset and monitoring initialised)
delayed alarm from external contact (dA, alarm reset and monitoring initialised)
defrost ended due to timeout alarm (Ed1 and Ed2, alarm reset)
pump down ended due to maximum time alarm (Pd, alarm reset)
low pressure from external contact alarm (LP, alarm reset and monitoring initialised)
autostart alarm in pump down (AtS, alarm reset and not displayed)
pre-alarm: high condenser temperature (cht, alarm reset, and monitoring initialised)
high condenser temperature alarm (Cht, alarm reset, and monitoring initialised)
door open for too long alarm (dor, alarm reset)
antifreeze alarm (AFr, alarm reset)
HA HACCP alarm (alarm reset, and monitoring initialised)
HF HACCP alarm (alarm reset, and monitoring initialised)
buzzer (OFF) and alarm relay (non-alarm status)
HACCP control
defrost according to programmed time bands
defrost according to compressor running time (if enabled)
defrost from digital input (if enabled)
defrost from keypad and supervisor
defrost started from digital input (if enabled)
direct/reverse from digital input (if enabled).
modification and display of frequent and configuration parameters and the set point
ON/OFF auxiliary relay 1 and 2 (set as LIGHT or AUX)
select the probe displayed (model M only)
compressor autostart in pump down (if enabled)
door switch (with fan and compressor shutdown) limited to light management
remote ON/OFF
curtain switch, limited to light management
door switch (with fan shutdown only) limited to light management
management of the light sensor
updating of the defrost interval timer “dI”
control probe error (rE)
probe 1 error (E0)
probe 2 error (E1)
probe 3 error (E2)
probe 4 error (E3)
probe 5 error (E4)
clock alarm (Etc)
EEPROM alarm, unit parameters (EE)
EEPROM alarm, operating parameters (EF)
light or AUX on/off based on the set time bands
modification of the set point based on the set time bands





















Tab. 6.d
Note: In the OFF status, the defrost interval ‘dI’ is always updated, to maintain the regularity of the interval. If a defrost interval expires during the OFF status, this event is saved and, when controller is switched back ON, a defrost
request is generated.
The controller switches from ON to OFF with the following sequence:
• the compressor protection times are observed;
• the pump down procedure is performed (if enabled);
• the defrost is forced OFF and will not resume when switched back ON;
• the continuous cycle is forced OFF and will not resume when switched back ON.
The controller switches from OFF to ON with the following sequence:
• the compressor protection times are observed;
• the defrost on start-up (if enabled) is not performed, as this in fact refers to power-up;
• the compressor and fan delays on start-up are not set.
20
ir33 +030220441 - rel. 2.5 - 16.06.10
6.4 Auxiliary output management
Button
Supervisor
Digital input
Time band
ENGLISH
The auxiliary output can be controlled by a number of sources: button, supervisor, digital input, and time band. The AUX is
switched on and off in the following events:
Aux
Action
pressing the button
variation in value from the supervisor
change in the status of the contact (opening/closing)
according to day, hour, minutes for switching on/off
Tab. 6.e
Therefore, if the digital inputs are stable, the AUX output can always be activated and de-activated from the keypad or the supervisor.
The timed light or AUX on/off events (parameters tON and tOFF, depending on parameter H8) are also active when the unit is off.
Note: the anti-sweat heater function, when the control is powered up or switched on, keeps the auxiliary output off until the
control temperature is below the set value. The AUX output is activated when the event occurs.
6.5 Light management
The light can be controlled by a number of sources: button, supervisor, door switch, curtain switch, light sensor and time band.
The light is switched on and off in the following events:
Light
Action
Button
Supervisor
Door switch
Curtain switch
Light sensor
Time band
pressing the button
variation in value from the supervisor
change in the status of the contact (opening/closing)
change in the status of the contact (opening/closing)
on detecting light or darkness
according to day, hour, minutes for switching on/off
Tab. 6.f
When the digital inputs (selected as door or curtain switches) are stable, the light can always be switched on or off from the
keypad or the supervisor. The door switch features two different algorithms for switching the light on/off :
• the status of the light is not affected, and acts only on the compressor and fans;
• timed light or AUX on/off events (depending on parameter H8) are also active when the unit is off.
Note: the anti-sweat heater function, when the control is powered up or switched on, keeps the light output off until the control
temperature is below the set value. The light output is activated when the event occurs.
6.6 Defrost
The parameter dC establishes the measurement unit for the times set by the parameters dI (defrost interval) and dP1, dP2 (maximum defrost duration). If the auxiliary relay is selected as the auxiliary evaporator defrost output (H1), the defrost is performed
at the same time on both evaporators. The parameter d/1 displays the defrost probe set for the main evaporator (the first probe
assigned as a defrost probe); while parameter d/2 displays the defrost probe set for the secondary evaporator (the second probe
assigned as a defrost probe). If no probes have been assigned to the defrost function, the defrost will end by timeout, after the
periods dt1 and dt2.
6.6.1 Defrost events
The following events activate the defrost function:
Event
Implementation
Update dI
Interval between defrosts dI expired
Depending on enabling status
At the expiry of the interval
Expiry of RTC trigger
Compressor running time
Interval between defrosts dI expired with skip defrost
algorithm
At start-up
Digital input
Supervisor
Keypad
Depending on enabling status
Depending on enabling status
Depending on enabling status
------When the defrost starts
At the expiry of the interval
Depending on enabling status
Depending on enabling status
Always
Always
At start-up + d5
When the defrost starts
---------------
Tab. 6.g
Implementation of defrost depending on enabling status:
If a digital input is configured to enable the defrost, the defrost is performed when such input is in the enabling status, otherwise
it stays pending.
Important: the defrost requested from the keypad or by the supervisor is always performed, even when there is a delayed defrost
request from external digital input or if there is a defrost enabling input (in non-enabled or delayed status). If parameter r3 is set
to 1 (Direct) or 2 (Reverse), the defrost is never performed.
6.6.2 Defrost request status
This status exists when one of the events that activates the defrost is present, but defrost cannot be started and, therefore, is put
on hold for the following reasons:
• compressor and fans start-up delay (c0), as these delay the activation of the compressor;
• compressor protection times (c1, c2, c3), as these delay the activation of the compressor;
• low pressure alarm (only with hot gas defrost), as this delays the activation of the compressor;
• continuous cycle running;
• pump down procedure running, as this delays the activation of the compressor;
• defrost delay at start-up (d5);
• defrost delay from digital input configured as defrost start or enable (d5);
• enable defrost (A4, A5, A9);
ir33 +030220441 - rel. 2.5 - 16.06.10
21
ENGLISH
•
•
•
•
immediate alarm from external digital input (A4, A5, A9), as this delays compressor activation;
alarm delayed by time (A7) from external digital input (A4, A5, A9) as this delays compressor activation;
high condenser temperature alarm (only with hot gas defrost), as this delays compressor activation
opening the door (only with hot gas defrost if the compressor has the door management algorithm).
6.6.3 Starting the defrost
The defrost is performed by electric heater or hot gas, according to the value of parameter d0. If defrost by temperature has been
selected, the defrost is performed only if the evaporator probe reading is less than the end defrost temperatures (dt1 and dt2), or if
there is a probe error. This is also true in the case of two evaporators.
For electric heater defrost:
• the compressor stops (pump down is run, if enabled);
• the time d3 elapses;
• the defrost relays for the main and second evaporators are activated, to start the heaters.
In hot gas defrost:
• the compressor starts;
• the time d3 elapses;
• the defrost relays for the main and second evaporators are activated to open the hot gas valve.
6.6.4 Defrost in progress
During the defrost procedure, the display is controlled by parameter d6. If during this procedure, the opening of the door is detected by
the external digital contact, the compressor stops (with the pump down procedure, if enabled). When the door closes, the compressor
resumes the defrost procedure, while the status of the fans is determined by setting of parameter F3. If defrost by temperature is selected, the temperature thresholds deactivate the corresponding defrost relay when the temperature exceeds the thresholds (‘dt1’,’dt2’)
and activate the corresponding defrost relay when the temperature is below the thresholds (‘dt1’,’dt2’) minus the fixed hysteresis of
1°C.
Notes:
1. if the defrost probe is specified for the second evaporator, but the second evaporator defrost output is not used, the defrost on
the second evaporator is performed using the output for the first evaporator. In this case, if defrost by temperature is selected,
the defrost relay is off if both evaporators probes have exceeded the corresponding thresholds (‘dt1’,’dt2’).
2. if the defrost probe is not specified for the second evaporator, but the second evaporator defrost output is used, the defrost on
the second evaporator is performed by time or considering the temperature of the first evaporator.
6.6.5 End defrost
The defrost ends by temperature (dt1, dt2) or by time (dP1, dP2) according to the setting of parameter d0. The defrost by temperature always ends after the set time (‘dP1’, ‘dP2’). If defrost by temperature is selected, it may also end by timeout (dP1, dP2) and,
in this case, according to the setting of parameter A8, signal Ed1 or Ed2 is displayed. In the case of an error in the probe selected
for the defrost (main or auxiliary evaporator), it is always performed by time, with the timeout signal if enabled (Ed1 or Ed2). In
the case of two evaporators, the defrost ends when both the evaporators have reached the end defrost condition. If one evaporator
finishes the defrost (by time or by temperature) before the other, the corresponding defrost relay is de-energised, while the
compressor remains in the status required by the defrost.
The defrost is ended early in the following situations:
• changeover from Direct operating mode with defrost to Reverse-cycle mode (heating), by parameter (r3) or the digital input
(A4, A5);
• end of enabling signal from external digital contact (the defrost request remains pending);
• instrument switched OFF from the keypad, supervisor and digital input;
• end defrost from supervisor and keypad.
If the defrost is completed early, the dripping and post-dripping (with the fans OFF) phases are not performed, as if the times
were 0.
Special case: if the controller is running a hot gas defrost and a low pressure alarm occurs, the compressor will stop due to the
low pressure alarm, and the defrost will probably end by timeout. At the end of the defrost:
• the compressor is stopped (hot gas) and pump down is run (if enabled), if a dripping time is set (dd);
• the fans are stopped, if a dripping time (dd) or fans off for post-dripping (Fd) is set;
• the defrost relay is disabled;
• the alarm bypass time after defrost is activated (d8);
• any pending defrost requests are reset.
If the dripping time is set to zero, the compressor remains in the previous status, and normal control resumes directly. If the dripping
and post-dripping times are set to zero, the compressor and the fans remain in the previous status, and normal control resumes.
6.6.6 End multiplexed defrost
The multiplexed defrost occurs:
• on the master ‘In’=1 following each event able to activate the defrost,
• on the slaves ‘In’=2 to 6 following a defrost signal from the supervisor.
In the case of multiplexed defrosts, the end defrost conditions described in the previous point are still valid, however before going to
dripping the master and slave wait for the signal from the network synchronizer. In any case, the defrost will end by timeout.
22
ir33 +030220441 - rel. 2.5 - 16.06.10
6.6.7 Dripping
ENGLISH
The dripping time is set by parameter dd, when the compressor is OFF and the fans are OFF. At the end of dripping time, the postdripping phase starts with the fans OFF (Fd):
• the compressor restarts normal operation;
• the fans remain off.
If the post-dripping time with fans OFF is set to zero, normal control is resumed directly.
6.6.8 Post-dripping (fans OFF)
The post-dripping time with fans OFF is set by parameter Fd. At the end of the post-dripping time with the fans OFF, normal
control resumes.
Notes on the defrost function
• If defrost with RTC is selected, the parameter dI has no effect. In any case, the dI timer is updated and the parameter becomes
valid on all days only in the event of RTC alarms. The parameter dI should therefore be set for safety reasons.
• The timer used to determine the defrost interval dI is updated cyclically when reaching the end of the interval, thus enabling
cyclical defrosts. The timer is also updated when the unit is OFF. If the timer dI expires when the unit is OFF, a defrost is
performed when the unit is started. If an “RTC” or manual defrost is run from the keypad or the supervisor, the timer linked to
dI is not reset at the start of the defrost. Consequently, at the end of the defrost, the dI timer may expire, and another defrost
may be performed. If a defrost is run from the digital input, with the compressor running time algorithm, or from the supervisor
in Slave controllers, the timer dI is reset when the defrost request is generated. In this way, the defrost interval is a timeout
for the generation of the defrost requests (used, for example, when the external timer is not working correctly). If defrost on
start-up (d4) has been selected, and a defrost on start-up delay (d5) has been set, the timer dI must be set to the end of the
defrost delay on start-up. For units programmed in the same way, and with the same value of ‘dI’ and different values of ‘d5’, this
enables the defrosts at start-up to be distributed through time, and the time staggering of the defrosts to be maintained for
the subsequent events too. If control with 2 compressor steps is selected (with or without rotation, H1 = 12 or 13) the hot gas
defrost requires the activation of the 2 steps, while the heater defrost deactivates the steps.
Function active
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
ir33 +030220441 - rel. 2.5 - 16.06.10
Function with defrost
On hold
When off the defrost is terminated
Normal operation
If required, the request remains during the
defrost
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
On hold
On hold
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Normal operation
Normal operation
Defrost ended due to timeout.
Normal operation
Normal operation
Tab. 6.h
23
ENGLISH
6.7 New defrost activation modes
6.7.1 Defrost according to compressor running time
To enable the controller for this operating mode, set a value >0 for parameter d10. This mode affects the start defrost, that is,
according to the evaporator temperature (parameter d11), the controller checks the compressor running time (parameter d10)
and decides whether to activate the defrost or not. There are two parameters:
• d10: compressor running time, with the evaporation temperature less than the threshold, after which a defrost request is
generated;
• d11: evaporation temperature threshold.
The defrost is generated if the compressor has operated:
• for time d10;
• with an evaporator probe reading less than d11.
If there are two evaporators, two separate timers will be used for each evaporator, and the count of each timer will be activated
whenever the compressor is ON and the corresponding evaporation probe is below the threshold d11. The defrost will start when
at least one of the two timers has expired, that is, when at least one of the evaporators has operated for the time d10 below the
temperature threshold d11.
6.7.2 Defrost at variable intervals (dI)
To enable the controller for this operating mode, set parameter d12=1.
The control algorithm, according to the duration of the previous defrost, increases or decreases the defrost interval (dI) proportionally for the following defrosts.
The following parameters are associated with this function.
• dI: interval between defrosts;
• d12: enable the function;
• dn: nominal duration of the defrost, in proportion to the set defrost timeout (value expressed as a %);
• dP1 and dP2: maximum defrost duration for evaporator 1 and 2;
• dH: control proportional factor.
The algorithm uses the following formulae: dn1
dn
100
dn
100
dP1 and dn2
dP2
to calculate the nominal defrost times dn1 and dn2 (in the case of the second evaporator) obtained as percentages dn of dP1 and dP2.
Therefore, if a defrost lasts less than the set time “dn”, the algorithm proportionally lengthens (depending on the value assigned to
parameter dH) the next defrost interval “dIn”.
The parameter ‘dH’is a proportional factor that amplifies or attenuates the variation of “dI”:
ΔdI
dn dE*
100 dP
dH
50
dI
dE* = effective defrost duration
dI
dI
DdI
dE < dn%
dE < dn%
dI ΔdI
may vary between
dI and
2dI
2
Example:
If, for example, the defrost interval (dI) is set to 8 hours and the maximum defrost duration (dP1 or dP2) is set to 30 minutes,
however usually the defrost is required for 50% less than the time dP1 or dP2, set parameter dn = 50%. The control algorithm
will calculate, using the formula dn/100 x dP1= dn1 or dn/100 x dP2= dn2 (in the case of the second evaporator), the nominal
defrost times “dn1” or “dn2”, which, in the example shown, corresponds to 15 minutes, that is, 50% of dP.
Sbrinamento
DdI
n
dE > dn%
The new interval dI1 for the next defrost is calculated by the algorithm, using the formula:
0
dI
1
dI
Intervallo di tempo dI
(impostato) tra gli sbrinamenti
dI
Nuovo intervallo di tempo
(calcolato) tra gli sbrinamenti
2
dI
dI
tempo
dI 1
dI +
Intervallo di tempo dI (impostato)
tra gli sbrinamenti
dn
100
dE
dP
dI
dH
50
At this point, if the defrost ends after 10 minutes (dE), replacing the known values in the formula gives:
50
10
dH
dI 1 8
8
Fig. 6.a
100
30
50
consequently:
dI 1
8 + 1.167
dH
50
.
It is therefore clear how the factor dH increases or decreases the new dI1.
1) If dH= 0 (no influence)
dI1= 8 + 0= dl
8 hours
2) If dH= 25 (low influence)
dI1= 8 + (1.167*0.5)
8 h & 34 min.
3) If dH= 50 (medium influence)
dI1= 8 + (1.167*1)
9 h & 9 min.
4) If dH= 75 (med/high influence)
dI1= 8+(1.167*1.25)
9 h & 27 min.
5) If dH=100 (high influence)
dI1= 8 + (1.167*2)
10 h & 19 min.
In summary, dI1 varies from 8 hours (dI) by setting dH=0 (minimum value), to 10 hours and 19 minutes, by setting dH=100
(maximum value).
24
ir33 +030220441 - rel. 2.5 - 16.06.10
6.7.3 Defrost at intervals calculated according to the duration of the previous defrost: Skip defrost
ENGLISH
To enable the controller for this operating mode, set the parameter d12=2.
In this case, according to the duration of the last defrost operation, the controller establishes whether the next defrost is skipped
or not.
The following parameters are associated with this function:
• d12: enable the function;
• dI: interval between defrosts;
• dn: nominal duration of the defrost, in proportion to the defrost timeout (value expressed as a %);
• dP1 and dP2: maximum defrost duration for evaporator 1 and 2.
When setting these parameters correctly, the algorithm calculates, using the following formulae:
dn1
dn
100
dP1 and dn2
dn
100
dP2 .
the nominal defrost times dn1 and dn2 (in the case of the second evaporator) obtained as percentages dn of dP1 and dP2
This function is based on a very simple but very effective principle. If the defrost lasts less than or equal to the time dn1 or dn2
(calculated with the formulae shown above), the next defrost due after the time “dI” will be skipped.
When the next defrost is performed, the check is repeated, and if the outcome is the same, then the following two due defrosts
are skipped, and so on according to the criteria described above (maximum 3 successive defrosts skipped). If 3 consecutive
defrosts are skipped and the actual defrosting time is still less than dn%, the cycle is terminated and the controller will skip one
more defrost.
As soon as the defrost time exceeds dn% of the time dP, the next defrost will be performed and the function will start again.
Sbrinamento
dE < dn%
dI
The algorithm counts the defrosts to be skipped:
• if defrost finishes in less time than dn1, the counter of the defrost operations to be skipped is increased by 1. The current value of
the counter indicates the defrost operations to be skipped;
• if the defrost ends normally, the next defrost is performed;
• when the counter reaches the value 3, three defrosts are skipped, and then the counter is reset to 1;
• when the instrument is switched on, the defrost is performed the first 7 times without increasing the counter, after which the
counter can be updated (from the eighth defrost on).
To the side is a graphical description of the function.
This function should be used with the programming of the defrosts equally distributed over the day (e.g. cyclical defrosts, parameter “dI”). This prevents skipping defrosts that would be the last before a long period programmed without defrosts (for example,
when the clock is used to program the defrosting of the utility at night only).
dE < dn%
dI
dI
dE < dn%
dI
si salta lo sbrinamento previsto
dI
si saltano due sbrinamenti previsti
dE < dn%
dE > dn%
dI
dI
lo sbrinamento viene
eseguito regolarmente
Fig. 6.c
To enable the controller for this operating mode, set parameter d12=3.
In this mode, the controller performs the defrosts considering both the duration of the previous defrost and the possibility of
skipping the defrost, as well as the interval set using parameter dI.
Parameters used:
• dI: interval between defrosts;
• d12: enable the function;
• dn: nominal duration of the defrost, in proportion to the set defrost timeout (value expressed as a %);
• dP1 and dP2: maximum defrost duration for evaporator 1 and 2;
• dH: control proportional factor.
The algorithm uses the following formulae to calculate:
dH
50
the nominal defrost times dn1 and dn2 (in the case of the second evaporator) obtained as percentages dn of dP1 and dP2
The parameter ‘dH’ is a proportional factor that amplifies or attenuates the variation of “dIn”. Consequently, in this operating
mode, if a defrost lasts less than the time “dn” established, the algorithm will proportionally add (according to the value assigned
to parameter dH) the time remaining from the previous defrost to the following defrost interval “dI1”. In addition to this, the
algorithm will skip, using the “skip defrost” principle, the next defrost/defrosts depending on the value reached by the skip defrost
counter (from 1 to 3).
ir33 +030220441 - rel. 2.5 - 16.06.10
dI
dI
tempo
dE < dn%
dI
si salta lo sbrinamento
dI
dI
si saltano tre sbrinamenti previsti
Sbrinamento
6.7.4 Defrost according to the duration of the previous defrost with skip defrost and variable dI (combination of 1 and 2)
dn dE*
100 dP
dI
Fig. 6.b
dI
ΔdI
dI
25
dI
dI
tempo
si salta lo sbrinamento
6.8 Pump down and low pressure
ENGLISH
6.8.1 Enabling the function
The pump down function is activated by setting parameter c7 (pump down duration) to any value other than zero.
The pump down valve must be connected to the auxiliary output, setting the relevant parameter (H1).
In addition, one of the digital inputs (A4, A5, A9) must be set as a low pressure input.
6.8.2 Pump down function
When the set point is reached (if the minimum compressor ON time c3 has elapsed), the controller closes the pump down valve,
stopping the refrigerant gas on the compressor suction side.
Parameter c10 can be used to select pump down by pressure. In this case, once the pump down valve closes, the compressor
continues to operate until reaching the low pressure value or the time c7. When this time elapses, the compressor is switched OFF,
irrespective of the status of the low pressure input and the Pd alarm (pump down ended by timeout) is disabled. In this case, the
compressor autostart function in pump down is disabl. Note: if the shut-down request occurs when the compressor is off and the
valve open (since, following the opening of the valve, the compressor has not yet started again), the routine closes the valve and if
necessary starts the pump down procedure if not in low pressure (if autostart and pump down by pressure is enabled). When the
controller requests the activation of the compressor, if the minimum OFF time c2 and the minimum time between two starts of
the compressor c1 have elapsed, the pump down valve is opened, allowing the refrigerant gas to return to the
compressor intake. The compressor is started after the delay time c8 from the opening of the valve. Note: if the start request
occurs when the compressor is ON and the valve OFF (as it is in pump down or autostart mode), the valve is opened immediately.
6.8.3 Compressor autostart in pump down
Parameter c9 is used to enable the compressor autostart function in pump down status. Once the compressor has been stopped
in pump down due to low pressure, if the low pressure switch signals an increase in pressure, due to the faulty seal of the pump
down valve, the compressor is started again until it reaches the low pressure value.
The compressor autostart function considers the minimum OFF time c2 and the time between two starts c1, while minimum ON
time is ignored. Consequently, when reaching the low pressure value, the compressor is stopped even if time c2 has not elapsed.
The activation of a compressor autostart cycle in pump down is signalled by the message AtS on automatic restoration of the next
correct pump down cycle.
6.8.4 Timed pump down function
Parameter ‘c10’ can be used to select timed pump down. In this case, after the valve closes, the compressor works until reaching
the low pressure or the time ‘c7’ expires. When this time expires, the compressor is stopped, irrespective of the status of the low
pressure input. The ‘Pd’ alarm (Pump down ended by timeout) is deactivated. In this case, the compressor autostart function in
pump-down is disabled.
6.8.5 Low pressure alarm (LP)
The low pressure alarm LP is activated when the pressure switch signals a low pressure situation with the pump down valve
open and the compressor operating. The low pressure alarm signal is nonetheless delayed by the time set for parameter A7. Low
pressure is not signalled during the compressor start-up phase (opening of the pump down valve and subsequent activation of the
compressor after the time c8), during the shutdown of the compressor in pump down and during the compressor autostart cycle
in pump down. The low pressure alarm shuts off the pump down valve and the compressor, and is automatically reset. The low
pressure alarm can be reset in any situation.
Note: if control with two compressor steps is selected (with or without rotation, H1= 12 or 13) the pump down is performed
when both steps are deactivated.
The autostart function re-activates both steps.
6.9 Continuous cycle
Pressing  for more than 5 seconds activates the continuous cycle function, that is, the compressor continues to operate,
independently of the controller, for the time cc, so as to lower the temperature even below the set point. If time cc is set to 0, the
continuous cycle is never activated.
The continuous cycle is stopped after the time cc or when reaching the minimum specified temperature, corresponding to the
minimum temperature alarm threshold (AL). If, after the end of the continuous cycle, the temperature falls by inertia below the
minimum temperature threshold, the low temperature alarm signal can be ignored by suitably setting the alarm bypass delay
time after continuous cycle, c6.
To start the continuous cycle, press  (MasterCella, powercompact and powercompact small) or
def
aux
+
(ir33, power and DIN) for more than 5 seconds.
The continuous cycle is not activated if:
• the duration of the continuous cycle (cc) is set to 0;
• the temperature is below the low level threshold;
• in reverse operation (heating), from parameter (r3) or from digital input (A4, A5, A9),
• when the unit is OFF.
6.9.1 Await continuous cycle status
SThis status exists when the activation of the continuous cycle is requested, however it cannot be started for one of the following
reasons:
• compressor protection times (c1, c2, c3), as they delay activation of the compressor;
• immediate or delayed alarm from external dig. input (A4, A5, A9), if this delays compressor activation;
• defrost, dripping or post-dripping in progress;
• compressor and fan start delay on start-up;
• door open (see Continuous cycle in progress, below);
• low pressure alarm (LP) active, as this delays activation of the compressor;
• high condenser temperature alarm (CHt) as this delays activation of the compressor.
During the continuous cycle request, the icon flashes.
26
ir33 +030220441 - rel. 2.5 - 16.06.10
6.9.2 Continuous cycle in progress
ENGLISH
When the continuous cycle is running:
• the compressor is always ON;
• the low temperature alarm is deactivated;
• the icon is on steady.
If, during the continuous cycle, the door is opened and one of the digital inputs is set to manage the opening of the door, the
compressor stops and consequently the continuous cycle is temporarily interrupted.
When the door closes the continuous cycle starts from where it left off, and thus ,in practice, the continuous cycle duration timer
(cc) is put on hold when the door is opened, and starts again when the door closes.
6.9.3 End of the continuous cycle
The continuous cycle ends in the following ways:
def
• pressing
(MasterCella, powercompact and powercompact small) or aux +
(ir33, power and DIN) for more
than 5 seconds;
• minimum specified temperature (AL) reached;
• maximum duration of the continuous cycle (cc) reached;
• instrument switched off (OFF) from the keypad or supervisor;
• changeover from Direct operating mode or Direct with defrost to Reverse-cycle mode (heating), by parameter (r3) or the digital
input (A4, A5, A9).
The low temperature alarm is bypassed for a time (c6) from the end of the continuous cycle.
Note: if control with 2 compressor steps is selected (with or without rotation, H1= 12 or 13) the continuous cycle activates both
steps.
Function active
Function with continuous cycle
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
On hold
When off, the continuous cycle ends
If necessary, the request remains during the
continuous cycle
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Activated
Activated
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Tab. 6.g
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
ir33 +030220441 - rel. 2.5 - 16.06.10
27
6.10 High condensing temperature alarm
ENGLISH
If a probe is set as a condenser probe (/A2, /A3, /A4, /A5), the condensing temperature can be monitored and a high temperature
condition signalled, probably due to situations of fouling and obstruction. If no condenser probe is selected, the condenser prealarm and alarm are disabled. The condenser fan output, if selected, is always OFF.
If two condenser probes are selected, the high condenser temperature pre-alarm and alarm management algorithms are performed with reference to the probe with the higher value.
The alarm status on one of the two condenser probes activates alarm management, ignoring the value of the other probe.
The condenser high temperature threshold can be set with the parameter Ac and with a hysteresis used for activating the high
condenser temperature alarm and for controlling the condensation fans by parameter AE. If the condenser temperature is > ‘Ac’+
(‘AE’/2), the pre-alarm is signalled, and there is no modification to the status of the loads, but the display simply shows message
‘cht’. If in the pre-alarm situation the condenser temperature falls to <‘Ac’, the pre-alarm ends and the signal ‘cht’ is cancelled. If
the condenser temperature is > ‘Ac’, the alarm delay timer is started (this can be set using the parameter ‘Acd’). If, at the end of
delay ‘Acd’, the temperature is still above the threshold ‘Ac’, the alarm ‘CHt’ is activated, the message ‘CHt’ is shown on the display
and the compressor is stopped, without observing the safety times (‘c1’, ‘c2’, ‘c3’). Alarm ‘CHt’ is manual reset only.
If, on the other hand, the temperature returns below the threshold, the timer is reset and the pre-alarm status or normal operation
resumes.
The auxiliary relays can be set as condenser fan outputs (‘H1 or H5’), which are activated if the condenser temperature is > ‘F4’ +
‘F5’ and are deactivated if the condenser temperature is < ‘F4’. If two condenser probes are selected, the high condenser temperature pre-alarm and alarm management algorithms are performed with reference to the probe with the higher value.
The alarm status on one of the two condenser probes activates alarm management, ignoring the value of the other probe.
In the event of a condenser probe error, the pre-alarm cht and the alarm CHt are generated automatically.
In the above situation, any auxiliary output configured as the condenser fan is activated.
Condenser probe
Not present
Two probes
Error (one of the probes)
Pre-alarm
Not generated
On probe with higher value
Generated
Alarm
Not generated
On probe with higher value
Generated
Condenser fan outputs selected
OFF
On probe with higher value
ON
Tab. 6.h
Function active
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
Function with condenser fan control
Normal operation
Condenser outputs deactivated, condenser pre-alarm and alarm reset
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Normal operation
Normal operation
Normal operation
Condenser output on, condenser pre-alarm and alarm generated.
Normal operation
Tab. 6.i
28
ir33 +030220441 - rel. 2.5 - 16.06.10
Control with dead band can be activated by using the aux1 or aux 2 output for the reverse step: H1 or H5=11. The set point ‘St’ is
in the centre of the dead band.
The parameter ‘rd’ represents the control differential associated with the compressor, ‘rn’ the size of the dead band, ‘rr’ the differential for reverse control associated with the aux1 or aux 2 output. The diagram in Figure 6.d shows control with dead band in the
case of direct operating mode (‘r3’=0 and 1).
The dead band is mainly used in direct operating mode. The diagram in Figure 6.e shows control with dead band in the case of
reverse operating mode (‘r3’=2).
The step associated with the aux1 or aux 2 output remains in reverse. The step associated with the compressor output passes from
direct to reverse.
Note:
1. the step associated with the aux1 or aux 2 output is only associated with the protection timer ‘c0’, while the step associated
with the compressor (in both direct and reverse) is associated with the timers ‘c0’‘c1’‘c2’‘c3’. As a result, the steps may be
active at the same time due to the protectors associated with the compressor step (minimum on time), as well as the unit
defrost status.
2. if the curtain switch function is enabled (‘A4’=7), the controller modifies the set point when the contact closes, adding or
subtracting the value of parameter ‘r4’; the new value is used for all functions relating to the set point (e.g. relative high and
low temperature alarms, dead band, etc.). When ‘r4’=3.0 (preset value) the set point is increased by 3 degrees compared to
the value used with the curtain open in direct mode, and decreased by 3 degrees in reverse mode. The rotation of the loads is
not envisaged in reverse operating mode (‘r3’=2). The following table defines the status of the reverse output (aux1 or aux
2) in control with dead band.
Function active
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
ir33 +030220441 - rel. 2.5 - 16.06.10
rr
rn
=
ENGLISH
6.11 Control with dead band
rd
=
REVERSE
DIRECT
zona di non
intervento
R
D
Grandezza controllata
St
Fig. 6.d
rn
rr
rn/2
rn/2
rd
R
R
St
Fig. 6.e
Reverse output in control with dead band
Normal operation
Reverse output deactivated
Normal operation
Reverse output deactivated
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Reverse output deactivated
Normal operation
Normal operation
Normal operation
Normal operation
Tab. 6.l
29
Temperatura
6.12 Control with second step
Direct
Control with a second step can be activated, using the aux1 or aux 2 output,‘H1 or H5’=12 or 13 (with selection of rotation). The set point
for the second step is equal to the sum of the set point ‘St’ and the parameter ‘rd’/2, which represents the differential. Control in
reverse mode is possible for the second step in the same way as for the first ( parameter r3, digital input), therefore three steps are
possible in reverse (with dead band control).
Below is a diagram of control with the second step in the case of direct operating mode (‘r3’=0 and 1).
Note: the step corresponding to the aux1 or aux 2 output is associated with the timers ‘c0’,‘c1’,‘c2’,‘c3’.
In addition, parameter ‘c11’ is active, setting the activation delay between the first and second step so as to distribute the starts over
time; no delay is available when deactivating.
If the curtain switch function is enabled (‘A4’=7), the controller modifies the set point when the contact closes, adding or subtracting
the value of parameter ‘r4’.
The new value is used for all functions relating to the set point (e.g. relative high and low temperature alarms, dead band, etc.). When
‘r4’=3.0 (preset value) the set point is increased by 3 degrees compared to the value used with the curtain open in direct mode, and
decreased by 3 degrees in reverse mode.
ENGLISH
D
Zona neutra
Direct
D
R
rr
St
rd/2
rd
Grandezza controllata
Fig. 6.f
Direct
D
D
Sonda virtuale
St
rd/2
Note: the rotation of the loads is available with the second step. Setting ‘H1 or H5’=13 activates the function, according to the
following table:
rd/2
Fig. 6.g
Step 1
off
on
on
on
off
on
Step 2
off
off
on
off
off
off
Rotation
0
0
0
1
0
0
Compressor 1
off
on
on
off
off
on
Compressor 2
off
off
on
on
off
off
Step 1
off
on
off
on
off
Step 2
off
off
on
off
off
Rotation
0
0
1
1
0
Compressor 1
off
on
off
off
off
Compressor 2
off
off
off
on
off
off
on
on
on
off
on
off
off
on
off
off
off
1
1
1
0
1
1
off
off
on
on
off
off
off
on
on
off
off
on
off
on
on
on
on
on
on
off
off
on
off
on
off
on
0
0
0
1
1
0
0
off
on
on
off
on
on
on
off
off
on
on
on
off
on
Tab. 6.m
When ‘H1 or H5’=13, the rotation flag is reversed whenever the compressor stops, and then on the following start request or the
following deactivation of one of the two loads, the load not involved in the previous activation or deactivation will be used.
Note: if control with 2 compressor steps is selected, all the functions that feature the activation or deactivation of the compressor
will activate or deactivate both steps.
Reverse
R
R
The following table defines the status of the second step output (aux1) during control.
St
rd/2
Sonda virtuale
rd/2
Fig. 6.h
Direct + zona neutra
D
D
R
St
r2
rn/2
Sonda virtu
rn/2
rd/2
rd/2
Fig. 6.i
Reverse + zona neutra
rr
rn/2
rn
rn/2
R
R
R
Temperatura
St
rd/2
rd/2
Fig. 6.l
Function active
Second step output
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
Normal operation
Output deactivated
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Output deactivated
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Output deactivated
Normal operation
Normal operation
Normal operation
Normal operation
Tab. 6.n
30
ir33 +030220441 - rel. 2.5 - 16.06.10
6.13 Anti-sweat heater function
Function active
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
ENGLISH
The anti-sweat heater function is used to maintain the aux1 or aux 2 output, configured as the light or aux: (H1 or H5= 2, 3, 8, 9)
deactivated while the control temperature (virtual probe) is less than ‘St’+‘Hdh’ when the instrument is first powered up, the ‘HI’‘IA’
‘dA ‘CHt’‘EE’‘EF’‘rE’ alarms are reset, or when switching on.
During the aforementioned alarms, the aux1 or aux 2 output, configured as above, is deactivated. ‘Hdh’ represents the offset from
the set point for the anti-sweat heater function. If ‘Hdh’=0, the anti-sweat heater function is disabled. Note: at the end of the antisweat heater function the outputs configured as the light or auxiliary can be controlled by the user using the keypad, the supervisor
or the digital inputs.
If the aux1 or aux 2 output is configured as light or auxiliary on power-up, it maintains the same status as prior to shutdown. If
the anti-sweat heater function is enabled, this is no longer true: on power-up, the output remains off for the entire time that the
function remains active. When the control temperature (virtual probe) reaches the value of ‘St’+‘Hdh’, the function ends, activating
the light output and the auxiliary output, irrespective of their status prior to shutdown.
Function with anti-sweat heater
Normal operation
Function restarted when switching on
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Function restarted.
Normal operation
Normal operation
Normal operation
Normal operation
Tab. 6.o
6.14 Antifreeze alarm
The antifreeze alarm is only active if a probe has been set as the antifreeze probe, /Ax = 4 (x=2-5).
ALF defines the temperature value below which the antifreeze alarm and AFr is activated, delayed by the time set for parameter
AdF. The alarm is reset manually or from the supervisor. This condition involves the deactivation of the compressor and the
activation of the alarm relay, if H1=0, 1.
Function active
Normal direct or reverse-cycle control
Remote off, from supervisor or keypad
Defrost
Continuous cycle
Temperature alarm monitoring
Evaporator fan control
Power on
Normally-open or normally-closed alarm output
Auxiliary output
Light output
Second evaporator output
Control output for pump down valve
Condenser fan control output
Second delayed compressor output
Auxiliary output with switch off
Light output with switch off
No function associated with the AUX output
Reverse output in control with dead band
Second compressor step output
Second compressor step output with rotation
Door switch with compressor, fan off and light management
Door switch with compressor off and light management
Curtain switch with set point variation and light management
Light sensor and light management
Auxiliary output activation switch
ir33 +030220441 - rel. 2.5 - 16.06.10
Function in antifreeze
Normal operation
Function disabled (timer restarted)
Normal operation
Sospeso o pendente
Normal operation
Normal operation
Normal operation
Output energised with ‘AFr’
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
Normal operation
31
Function active
ENGLISH
Door switch with compressor, fan off, no light management
Door switch with compressor off, no light management
Light activation from keypad or supervisor
Auxiliary activation from keypad or supervisor
Alarms
Virtual control probe alarm
Product probe alarm
Defrost probe alarm
Condenser probe alarm
Antifreeze probe alarm
Function in antifreeze
Normal operation
Normal operation
Normal operation
Normal operation
See table of alarms and signals
Normal operation
Normal operation
Normal operation
Normal operation
Activation of ‘AFr’ alarm
Tab. 6.p
6.15 Special functions for the management of multiplexed cabinets (mpx)
6.15.1 Multiplexed defrost
The multiplexed defrost allows the showcases belonging to the same sub-network to be defrosted in synch. As regards the instruments, the function is managed by a synchronizer that establishes the start and the end of the defrost, as well as checking when all
the controllers have reached the end of the defrost (before the dripping phase). The master spontaneously starts the defrost (from
any of the sources: RTC, keypad, supervisor, at intervals, …).
The synchronizer detects the start of the defrost on the master and then activates it on the slaves.
The master and slaves tell the synchronizer when they have reached the end defrost condition (before the dripping phase). The
synchronizer sends a signal to all the units in the defrost status to end the procedure and pass to the dripping phase when all of
them have reached the end defrost condition (including the end defrost by time out, parameter dP).
Note: the synchronization of the multiplexed defrost is only activated in the Master and Slave controllers (‘In’=1 to 6).
In the case of Slaves, the synchronization only takes place if the defrost has been started from the supervisor.
6.15.2 Remote alarm signals
The alarm signals can be activated on other controllers in the system. This means that on each controller, the synchronizer can activate an alarm signal relating to another controller, using the symbol nx, where x may be between 1 and 6. Therefore, for example, if
the controller with local network address 2 (slave 2) has an alarm, the signal n2 will be displayed on the controllers enabled.
The parameter HSA enables the synchronizer to send the alarms to the controller from other devices in the local network. When
displaying the remote alarms the alarm relay, if selected, is activated.
Note: the synchronizer decides which alarms are signalled remotely.
6.15.3 Remote light and auxiliary output
The light and aux relays on the master and on the slaves connected in the local network can be synchronized. The parameters ‘HrL’
and ‘HrA’ enable the synchronizer to send the status of the master light and the auxiliary relay, respectively.
Note: the remote light and auxiliary function is managed by the synchronizer.
6.15.4 Downloading the parameters
Entering parameter configuration mode, with the current password + 44 (22 + 44 = 66), activates the download of the parameters. The download can be performed either from the master or from a slave in the local network. The controller that starts the
function transfers its parameters to the other units.
The synchronizer activates the message ‘dnL’ on all the controllers for the duration of the operation.
In the event of errors when transferring the parameters, network errors, or errors saving the parameters to the controller, at the end
of the download the synchronizer activates the corresponding error message (dx, x=1 to 6) to indicate that the download to unit
x was not performed correctly.
Note: The parameters are downloaded by the network synchronizer, and thus this devices defines which parameters are transferred
during the download.
Important: the parameters HrL, HrA, HsA and In are masked and therefore only visible using the programming kit (IROPZPRG00).
32
ir33 +030220441 - rel. 2.5 - 16.06.10
6.16 HACCP (Hazard Analysis and Critical Control Point)
ENGLISH
This function can only be activated on the controllers with the RTC option fitted, and allows advanced control of the operating
temperature and the recording of any anomalies due to power failures or increases in the operating temperature due to various
causes (breakages, severe operating conditions, operator errors, etc…).
There are two types of HACCP alarm, signalled on the display with the following codes respectively: HA and HF. “HA” - if, during
operation, the temperature measured is higher than the threshold set for the parameter “AH” (high temperature alarm threshold)
for a time Th higher than the sum of the parameter “Ad” (HACCP alarm delay) and the parameter “Htd” (temperature alarm detection
delay), the HA alarm is generated.
Registrazione massima temperatura
Allarme HA
Temperatura
AH
set
point (St)
Tempo
H td +Ad
Durata allarme
Fig. 6.m
“HF” – this occurs after a power failure for an extended time (>1 minute) if, when power returns, the temperature is higher than
the threshold set for the parameter “AH” (the absolute value of AH,
if “A1”= 0; the relative value equal to “AH” + “St”, if “A1”= 1.
Temperatura
Allarme HF
Black out
AH
set
point (St)
Tempo
Fig. 6.n
The following data are saved when the HA or HF event occurs:
• hour, minutes and day of the week,
• type of alarm,
• maximum temperature reached after the activation of the alarm,
• duration of the power failure.
The activation of one or both of the alarms causes the HACCP LED to flash and the display of the alarm code, as well as the recording
of the alarm to the E2PROM and the activation of the alarm relay or buzzer
(if present).
Pressing SET and  for more than 5 seconds from the HACCP alarm menu resets the flashing of the HACCP LED, the HA and/or HF
signal and reinitialises the monitoring of HA.
Pressing the PRG button mutes the buzzer and resets the alarm relay (if present).
The date and time of the last 3 HA and HF alarms can be displayed with 6 parameters: HA, HA1, HA2 and HF, HF1, HF2. The activation
of a new HA or HF alarm shifts the list of the last 3 alarms, deleting the oldest event. The new alarm can be displayed using the
parameter that identifies the most recent alarm, that is, HA or HF.
The counter of the alarm events, HAn or HFn, is increased up to a maximum value of The activation of one or both of the alarms
causes the HACCP LED to flash and the display of the alarm code, as well as the recording of the alarm to the E2PROM and the
activation of the alarm relay or buzzer (if present).
Pressing SET and down for more than 5 seconds resets the flashing of the HACCP LED, the HA and/or HF signal and reinitialises the
monitoring of HA.
Pressing the button mutes the buzzer and resets the alarm relay (if present).
The date and time of the last 3 HA and HF alarms can be displayed with 6 parameters: HA, HA1, HA2 and HF, HF1, HF2. The activation
of a new HA or HF alarm shifts the list of the last 3 alarms, deleting the oldest event. The new alarm can be displayed using the
parameter that identifies the most recent alarm, that is, HA or HF.
The counter of the alarm events, HAn or HFn, is increased up to a maximum value of 15.
ir33 +030220441 - rel. 2.5 - 16.06.10
33
ENGLISH
7. DESCRIPTION OF THE OPERATING PARAMETERS
7.1 Temperature probe management parameters
Code
Pw
/2
/3
/4
/5
/6
/tI
/tE
/P
/A2
Parameter
Password
Measurement stability
Probe display response
Virtual probe
Select °C or °F
Decimal point
Display on internal terminal
Display on external terminal
Select type of probe
Configuration of probe 2 (S2)
/A3
/A4
/A5
/c1
/c2
/c3
/c4
/c5
Configuration of probe 3 (S3, DI 1)
Configuration of probe 4 (S4, DI 2)
Configuration of probe 5 (S5, DI 3)
Calibration of probe 1
Calibration of probe 2
Calibration of probe 3
Calibration of probe 4
Calibration of probe 5
Models
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
YF
MS
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
UOM
flag
flag
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
Type
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Min
0
1
0
0
0
0
1
0
0
0
0
0
0
0
-20
-20
-20
-20
-20
Max
200
15
15
100
1
1
7
6
2
4
4
4
4
4
20
20
20
20
20
Def.
22
4
0
0
0
0
1
0
0
2
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Tab. 7.a
Note: par. /A5 and /c5 refer to instruments with 5 relays (ir33DIN, powercompact and MasterCella).
‘/2’: Measurement stability
Defines the coefficient used to stabilise the temperature reading. Low values assigned to this parameter allow a prompt response of
the sensor to temperature variations, but the reading becomes more sensitive to disturbance. High values slow down the response,
but guarantee greater immunity to disturbance, that is, a more stable and more precise reading. The parameter acts on the temperature readings, filtering the minimum variations, and at the same time considers the average of the readings. Default: ‘/2’=4.
/3: Probe display response
This parameter is used to set the update rate for the temperature display. The temperature shown on the display tends to follow rapid
deviations away from the set point very slowly, and vice-versa, moves very quickly in the event where the temperature displayed
is nearing the set point. If the control temperature exceeds the high or low temperature thresholds (and an AL or AH alarm is
activated), or if the maximum number of filtering steps (255) is exceeded (see the Timeout column in Table 7.b), the filtering would
immediately be bypassed and the temperature displayed would be the temperature effectively measured, until all the alarms are
reset. The parameter only affects the temperature displayed, and not the temperature used for the control functions.
Important:
• the control temperature actually measured differs from the value displayed, and therefore the outputs may not be activated with
reference to the latter temperature value.
• if the probe displayed is a product probe, with temperature values higher than the set point, the probe display rate algorithm will
be faster for decreases in the temperature and slower for increases;
• if the probe displayed is an evaporator or condenser probe, the display rate algorithm always refers to the set point and thus may
have specific effects (fast when the evap. probe reading increases and slow when it decreases; fast when the condenser probe
reading decreases and slow when it increases);
• the parameter /3 acts on the temperature displayed by the instrument, if /tE=0 (no probe displayed by the repeater display); if
the repeater display is configured (/tE <> 0), the parameter /3 will act on the temperature displayed by the repeater.
Example: in the case of “bottle coolers”, typically used in supermarkets, when the doors are opened frequently, due to the greater
thermal inertia of the liquids compared to the air (and the fact that the probe is positioned in the air and not directly on the products), the instrument measures a temperature that is higher than effective temperature of the soft drinks, thus displaying a quite
“unrealistic” temperature. Setting the parameter /3 to a value other than 0, any abrupt variations in temperature are “filtered” on the
display, showing a temperature trend that is “closer” to the actual trend of the product temperature. The following table shows the
possible values of ‘/3’ and the corresponding display delayed update values (Tdel).
Value of par. /3
Display delay (Tdel)
Timeout
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Disabled
5s
10 s
15 s
20 s
25 s
30 s
40 s
50 s
60 s
75 s
90 s
105 s
120 s
150 s
180 s
0
21 min
42 min
64 min
85 min
106 min
127 min
170 min
212 min
255 min
319 min
382 min
446 min
510 min
637 min
765 min
Tab. 7.b
Default: ‘/3’=0 => Function disabled.
/4: Probe average (virtual probe)
This parameter is used to choose whether to control the temperature based solely on the room probe reading, or alternatively
whether to refer to the “weighted” average of the room probe S1 and probe 2 (S2, see the parameter ‘/A2’). This parameter is
useful in special applications.
34
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
Example: if the room probe is in intake mode, and probe 2 in outlet mode, control can be performed based on the weighted
average of the 2 values read.
The formula used is: probe average (Virtual probe) = [S1 x (100 - P) + (S2 x P)] / 100 where:
S1 = room probe; S2 = probe 2; P = value of the parameter /4.
Virtual probe:
• /4=0 control is performed using the room probe - this is the typical situation;
• /4=100 control is performed in reference to the values read by probe 2;
• /4=50 control refers to a “virtual” probe, calculated based on the average between the room probe and probe 2. With values
above 50, probe 2 has a greater weight in the calculation, vice-versa for values below 50.
Important: in the event of faults or if probe 2 is not enabled, the instrument uses the room probe only. If the fault is on the room
probe, the “Control probe” error is signalled.
Default: /4=0 => control on room probe.
/5: Select °C or °F
Defines the unit of measure (degrees Centigrade or degrees Fahrenheit) shown on the display.
/5=0 to operate in degrees Centigrade.
/5=1 to operate in degrees Fahrenheit.
Default: /5=0 => operation in degrees centigrade.
/6: Decimal point
Used to enable or disable the display of the temperature with resolution to the tenth of a degree between -20 and + 20.
Note: the exclusion of the decimal point is active only with reference to the display of the reading on the main and remote
displays, while the parameters are always set to the tenth of a degree.
‘/6’=0 the readings are displayed to the tenth of a degree, between -20 and +20 °C;
‘/6’=1 all the readings are displayed without the tenths of a degree.
Default: /6 = 0 = > decimal point displayed.
/tI: Probe displayed on instrument
For selecting the probe to be displayed by the instrument.
/tI=1 => virtual probe
/tI=2 => probe 1
/tI=3 => probe 2
/tI=4 => probe 3
/tI=5 => probe 4
/tI=6 => probe 5
/tI=7 => set point
Note:
• control is always based on the virtual control probe;
• if the probe to be displayed has not been enabled, the display will show the message ‘___’.
Default: /tI=1 => Virtual probe.
/tE: Probe displayed on external terminal
Selects the probe to be displayed on the remote terminal.
/tE=0 => remote terminal not present
/tE=1 => virtual probe;
/tE=2 => probe 1;
/tE=3 => probe 2;
/tE=4 => probe 3;
/tE=5 => probe 4;
/tE=6 => probe 5.
Important:
Control is always based on the virtual control probe;
If the probe to be displayed has not been enabled, the display will show the message ‘___’;
If the probe to be displayed is faulty, the display will show the message ‘___’;
If the terminal is not present, the display will remain completely dark.
Default: /tE=0 => Remote terminal not present.
/P: Select type of probe
Used to select the type of probe used for the measurements.
/P=0 => NTC standard with range -50T90 °C
/P=1 => NTC with extended range -40T150 °C
/P=2 => PTC standard with range -50T150°C
For correct readings from the PTC probes, the hardware must be prepared to accept PTC readings (as well as NTC).
Note: all models in the ir33 range manage NTC probes with extended range (models HT).
Default: ‘/P’=0 => NTC standard with range -50T90 °C
Available on all models fitted with NTC inputs.
ir33 +030220441 - rel. 2.5 - 16.06.10
35
ENGLISH
/A2: Configuration of probe 2
Used to configure the operating mode of probe 2.
/A2= 0 => probe 2 absent
/A2= 1 => product probe (used for display only)
/A2= 2 => defrost probe
/A2= 3 => condenser probe
/A2 = 4 => antifreeze probe
In any case, probe 2 is used for calculating the virtual control probe.
Default: /A2= 2 => defrost probe; /A2= 0 on models M and S => probe 2 absent.
/A3: Configuration of probe 3
As above, but relating to probe 3.
Important note: the input is enabled for use with a probe only if the parameter corresponding to digital input A4 is set to 0.
Default: /A3= 0 => Probe 3/Digital input absent.
/A4: Configuration of probe 4
As above, but relating to probe 4, if fitted.
Important note: the input is enabled for use with a probe only if the parameter corresponding to digital input A5 is set to 0.
Default: /A4 = 0 => Probe 4/Digital input absent.
/A5: Configuration of probe 5
As above, but relating to probe 5, if fitted.
Important note: the input is enabled for use with a probe only if the parameter corresponding to digital input A9 is set to 0.
Default: /A5 = 0 => Probe 5/Digital input absent.
Note: if more than one probe is configured with the same operating mode, the controller will consider, for the operating mode in
question, the first probe in increasing order from 2 to 5 with this configuration.
Example: if there are three condenser probes configured, /A3=3/4=3 and /A5=3, the controller will manage the alarm
algorithm with reference to probe 3 and 4.
/C1: Calibration or offset for probe 1
/C2: Calibration or offset for probe 2
/C3: Calibration or offset for probe 3
/C4: Calibration or offset for probe 4
/C5: Calibration or offset for probe 5
These parameters are used to correct the temperature measured by the probes, using an offset: the value assigned to these
parameters is in fact added to (positive value) or subtracted from (negative value) the temperature measured by the probes. The
temperature value is corrected by the offset before checking if the reading is out-of-range.
Example: to decrease the temperature measured by probe 1 by 2.3 degrees, set /C1= -2.3. The calibration or offset can be set
from -20 to +20.
Warning: if the probe is disabled, the display shows ‘___’. If the probe is faulty, the display shows the corresponding error code.
When displaying the parameter, pressing SET shows the value of the corresponding probe already corrected with the offset, while
pressing SET a second time displays the abbreviated code.
Default: /C1=/C2=/C3=/C4=/C5=0 no offset.
7.2 Temperature control parameters
DIRECT Freddo
rd
ON
attuatore
D
OFF
Code
Parameter
Model
UOM
Type Min
Max Def.
St
rd
rn
rr
r1
r2
r3
r4
r5
rt
rH
rL
Temperature set point
Control delta
Dead band
Reverse differential for control with dead band
Minimum set point allowed
Maximum set point allowed
Operating mode
Automatic night-time set point variation
Enable temperature monitoring
Temperature monitoring interval
Maximum temperature read
Minimum temperature read
MSYF
-SYF
-SYF
-SYF
MSYF
MSYF
-SYF
MSYF
MSYF
MSYF
MSYF
MSYF
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
flag
°C/°F
flag
hours
°C/°F
°C/°F
F
F
C
C
C
C
C
C
C
F
F
F
r2
20
60
20
r2
200
2
20
1
999
-
0.0
2.0
4.0
2.0
-50
60
0
3.0
0
-
Tab. 7.c
Set Point
St: set point
Establishes the set point value used by the controller. Default: St=0.0.
Fig. 7.a
rd: Control delta
Establishes the value of the differential, or hysteresis, used for temperature control. Low values guarantee an ambient temperature
that deviates only slightly from the set point, but involves frequent starts and stops of the main actuator (normally the compressor).
In any case, the compressor can be protected by suitably setting the parameters that limit the number of
activations/hour and the minimum OFF time (see the C parameters).
Note: if control with two compressor steps has been selected (‘H1, H5’=12, 13), the differential ‘rd’ is divided between the two
steps.
Default: rd =2
Direct
Sonda virtuale
St
rd/2
r1
0.1
0.0
0.1
-50
r1
0
-20
0
0
-
rd/2
Fig. 7.b
rn: Dead band
Establishes the value of the dead band, when the auxiliary output is selected as heating, in control with dead band mode. The
differential is in the centre of the dead band.
36
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
Note:
• the step associated with the aux 1 or 2 output is only associated with the protection timer c0, while the step associated with the
compressor (in both direct and reverse operation) is associated with the timers c0, c1, c2, c3. As a result, the steps may be active
at the same time due to the protectors associated with the compressor step (minimum on time), as well as the unit defrost
status;
• if the curtain switch function is enabled (‘A4, A5, A9’=7), the controller modifies the set point when the contact closes, adding
or subtracting the value of parameter ‘r4’; the new value is used for all functions relating to the set point (e.g. relative high and
low temperature alarms, dead band, etc.). When ‘r4’=3.0 (preset value) the set point is increased by 3 degrees compared to the
value used with the curtain open.
Default: ‘rn’=4.
rr: Reverse differential for control with dead band
Establishes the value of the differential used in reverse temperature control, when the auxiliary output is selected as heating, in
control with dead band mode. Default: ‘rr’=2.
Note: no protection times are featured for the reverse output.
r1: minimum set point allowed
Determines the minimum value that can be set for the set point. Using this parameter prevents the user from setting a set point
lower than the value indicated by r1. Default: r1=-50.
r2: maximum set point allowed
Determines the maximum value that can be set for the set point. Using this parameter prevents the user from setting a set point
higher than the value indicated by r2. Default: r2 = +60.
REVERSE Caldo
r3: operating mode
ir33 can work as a thermostat and defrost controller for static units at normal temperature (r3=0), as a simple thermostat in Direct
operation (r3=1), or as simple thermostat in Reverse-cycle operation (r3=2).
r3=0 Direct thermostat with defrost control (cooling);
r3=1 Direct thermostat (cooling);
r3=2 Reverse-cycle thermostat (heating).
Also see the description of parameters A4, A5, A9.
Note: with r3=1 and r3=2, the defrosts are always disabled.
A digital input set for direct/reverse-cycle control with parameter r3 has priority over the operating mode. The figure to the side
shows reverse control with two compressor steps.
Default: r3=0=> Direct thermostat operation with defrost control.
rd
R
OFF
Reverse
r4:Automatic variation of the set point in night-time operation
This parameter is part of the group for control of the curtain switch, together with A4, A5 and A9,
programmable for configuring the digital inputs. When the curtain is closed, and consequently, the digital input connected to the
curtain switch is closed, the controller automatically increases the set point by the value assigned to r4 in direct mode (cooling),
and automatically decreases the set point by the value assigned to r4, in reverse mode (heating).
Important: if the value of r4 is negative, the controller with the curtain switch closed will decrease the set point, in direct mode
(cooling), and increase the set point in reverse mode (heating).
Default: r4=3.0..
St
rd/2
rd/2
Fig. 7.c
r5: Enable minimum and maximum temperature monitoring.
r5=0 disabled
r5=1 enabled
Default: r5=0
rt: Effective interval for monitoring the maximum and minimum temperature.
rH: Maximum temperature measured in the interval rt.
rL: Minimum temperature measured in the interval rt
All these parameters are used by the instruments to record the minimum and maximum temperature measured by the room
probe in a period of up to 999 hours (over 41 days). To enable this function, proceed as follows:
• set r5=1; select rt;
• press SET to display for how many hours the minimum and maximum temperature have been recorded (if the function has just
been enabled, rt=0);
• to start recording the temperatures again, press q for more than 5 seconds when displaying the hours (the message rES
indicates that the value has been reset).
The instrument resets the number of hours and restarts the monitoring process;
• to display the maximum temperature measured by the probe, read the value associated with rH, while to display the minimum
temperature measured by the probe, read the value associated with rL..
Important:
• after the maximum time of 999 hours, the monitoring of the minimum and maximum temperature continues, while the time
value remains fixed at 999.
ir33 +030220441 - rel. 2.5 - 16.06.10
ON
attuatore
37
Sonda
virtuale
7.3 Compressor management parameters
ENGLISH
ON
accensione strumento
power ON
OFF
ON
richiesta di intervento
insertion request
Code
c0
c1
c2
c3
c4
cc
c6
c7
c8
c9
c10
c11
OFF
ON
compressore
compressors
OFF
C0
Fig. 7.d
ON
richiesta inserimento
insertion request
OFF
ON
compressore
compressors
OFF
C1
Parametro
Compressor, fan and AUX start delay on power up in dead zone
Minimum time between successive starts
Minimum compressor OFF time
Minimum compressor ON time
Duty setting
Continuous cycle duration
Alarm bypass after continuous cycle
Maximum pump down time
Comp. start delay after open PD valve
Enable autostart function in PD
Select pump down by time or pressure
Second compressor delay
Models
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
U.M. Type Min
min
C
0
min
C
0
min
C
0
min
C
0
min
C
0
hours C
0
h/min C
0
s
C
0
s
C
0
flag
C
0
flag
C
0
s
C
0
Max
15
15
15
15
100
15
250
900
60
1
1
250
Def.
0
0
0
0
0
0
2
0
5
0
0
4
Tab. 7.d
c0: Compressor and fan start delay (if ‘FAN’ relay present) on start-up
When the controller is switched on, the compressor and the evaporator fans and the auxiliary relay in control with dead band (H1 or
H5=11) start after a delay (in minutes) equal to the value set for this parameter, in order to protect the compressor against repeated
power-ups in the event of frequent power drops. Default: c0=0 => no minimum delay is set.
Fig. 7.e
Example: setting c0=6 forces the compressor to wait 6 minutes before starting from when power returns. In the event of systems
with more than one compressor, the parameter c0 can also be used to avoid simultaneous starts of a series of units. Simply set
a different value of c0 for each compressor. Note: the second compressor step, for the aux 1 or 2 output (‘H1 or H5’=12, 13), is
associated with the timers ‘c0’, ‘c1’, ‘c2’, ‘c3’.
ON
richiesta inserimento
insertion request
OFF
ON
compressore
compressors
OFF
c1: Minimum time between two successive starts of the compressor
Sets the minimum time (in minutes) that must elapse between two starts of the compressor, irrespective of the temperature and the
set point. Setting this parameter limits the number of starts per hour.
Default: c’=0 => no minimum time is set between two starts.
Example: if the maximum number of activations/hour allowed is 10, simply set c1=6 to ensure that this limit is respected. Note:
the second compressor step, for the aux 1 or 2 output (‘H1 or H5’=12, 13), is associated with the timers ‘c0’, ‘c1’, ‘c2’, ‘c3’.
C2
Fig. 7.f
ON
richiesta inserimento
insertion request
OFF
ON
compressore
compressors
c2: Minimum compressor OFF time
SSets the minimum time (in minutes) for the compressor to remain OFF. The compressor is not started again until the minimum
time selected (c2) has elapsed from when it last stopped.
Note: this parameter is useful to ensure the balancing of the pressure after the compressor stops for systems with hermetic and
capillary compressors. The second compressor step, for the aux 1 or 2 output (‘H1 or H5’=12, 13), is associated with the timers
‘c0’,‘c1’,‘c2’,‘c3’.
OFF
C3
Fig. 7.g
c3: Minimum compressor ON time
Sets the minimum running time for the compressor. The compressor is not stopped until it has been ON for at least the minimum
time selected (c3). Note: the second compressor step, for the aux 1 or 2 output (‘H1 or H5’=12, 13), is associated with the timers
‘c0’,‘c1’,‘c2’,‘c3’.
Default: c3=0 => no minimum running time is set.
C4
ON
compressore
compressors
OFF
OFF = 15 min.
c4: Duty setting
If the virtual control probe fault alarm occurs (see parameter ‘/4’), this parameter is used to ensure the operation of the compressor until the fault is resolved.
Default: c4=0 => compressor always Off in the event of a virtual control probe error.
Important: In the event of errors on probe 2, the virtual probe corresponds to the room probe (probe 1) and consequently the
Duty Setting is not activated.
In practice, as the compressor is no longer able to operate based according to the temperature (due to the probe fault), it is made
to run cyclically with an operating time (ON time) equal to the value assigned to parameter c4 (in minutes) and a fixed OFF time
of 15 minutes.
There are two values of c4 that cause special behaviour:
c4=0, in the event of faults involving the virtual control probe, the compressor is always OFF;
c4=100, the compressor is always ON, that is, the 15 minute OFF time is always ignored.
Fig. 7.h
Special situations:
• if the virtual control probe error occurs while the compressor is OFF, it remains OFF for 15 minutes, and is then started
(respecting the times set for parameters c1 and c2) and remains ON for a time equal to c4, Duty Setting. This special operation is
signalled by the LED that flashes during the compressor OFF period, and remains on steady when the compressor is operating.
The fans continue to operate according the set parameters (see F parameters). If the duty setting requires the immediate shutdown of the compressor for a non-specified time (c4= 0), this is done without observing the compressor protection times.
• if the virtual control probe error occurs while the compressor is ON, it remains ON for the time c4, and then is stopped (without
observing the minimum ON time, if set for parameter c3) and remains OFF for 15 minutes (the LED flashes in this phase).
After this, cyclical operation starts, with an operating time equal to the value of c4.
Warning: If the virtual probe error disappears, the unit returns to normal operation.
Note: if control with two compressor steps is selected (with or without rotation, ‘H1 or H5’= 12 or 13), the duty setting acts on
both steps.
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ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
cc: Continuous cycle duration
This is the time (in hours) during which the compressor operates continuously to lower the temperature, even below the set point.
With cc=0 => the continuous cycle is disabled. The controller exits the continuous cycle procedure after the time set for parameter cc has elapsed, or upon reaching the minimum specified temperature (see the minimum temperature alarm, parameter AL).
Default: cc=0 (hours).
Note: if control with two compressor steps is selected (with or without rotation, ‘H1 or H5’= 12 or 13), the continuous cycle acts
on both steps
c6: Alarm bypass after continuous cycle
This is the time (in hours or minutes) for which the temperature alarm is deactivated after a continuous cycle. If the temperature
of the refrigeration unit, after the continuous cycle, falls due by inertia below the minimum temperature (set point – AL), the
activation of the low temp. alarm is delayed for the time c6.
Default: c6=2 (hours).
Warning: remember that at the minimum specified temperature (see the minimum temperature alarm, parameter AL) the
continuous cycle is forced OFF and deactivated.
Parameter ‘c6’ may be expressed in hours ‘dC1’ = 0’ (default) or minutes ‘dC1’=1’.
c7: Maximum pump down time
This parameter determines, depending on the setting of parameter c10, the maximum time in minutes by which the circuit must
reach the required low pressure value in pump down operation (c10=0), or the compressor operating time after the closing of the
pump down valve in case of pump down operation by time (c10=1). The pump down valve must be connected to the auxiliary
output, setting the relevant parameter (H1 or H5).
Pump down by pressure (c10=1):
When reaching the maximum pump down time, the compressor stops and the Pd alarm is activated, which disables the compressor
autostart function (see parameter c9) with the pump down valve closed, on the “high pressure” request from the pressure switch.
The compressor remains OFF until the controller requires cooling. When reaching the set point, a pump down procedure is run and
the alarm is
automatically reset if the low pressure is reached within the time c7.
Low pressure is monitored by connecting the low pressure switch to one of the two digital inputs and setting the parameter A4, A5
or A9.
Pump down by time (c10=1):
When the compressor operating time c7 is reached after the closing of the valve, the compressor is stopped, irrespective of the low
pressure reading, and the Pd alarm is deactivated. In any case, the compressor is stopped when reaching the low pressure.
In this case, autostart in pump down is disabled. Default: c7 =0 => pump down disabled.
c8 : Compressor start delay after opening of PD valve
This parameter determines after how many seconds from the opening of the pump down valve the compressor starts. It is useful
to avoid activating the LP alarm unnecessarily.
The low pressure alarm (LP), with valve open and compressor ON, is activated by the opening of the pressure switch. This alarm
stops the compressor and is reset automatically.
Starting from July 2007 parameter c8 has been set to 0 and is not visible in the controllers distributed. The function relating to c8
can still be used, however it must be stressed that in certain conditions, during the time c8 (alarm from digital input, probe alarm,
on/off ), the pump down valve may remain open.
c9: Enable autostart function with PD operation (active when C7=6)
If parameter c9 is set to 0, the system will perform a pump down cycle each time the pump down valve closes. If the parameter
is set to 1, on the other hand, the system will perform a pump down cycle each time the pump down valve closes and on each
successive request from the low pressure switch when there is no cooling requirement (autostart situation). The activation of a
compressor autostart cycle in pump down is signalled by the message ‘Ats’. This message is reset automatically on the next correct
pump down cycle. The autostart function is disabled if Pd alarms are active or if pump down by time is selected.
Note: the autostart function is disabled in the off status and if the controller has been switched on but the compressor has not yet been
activated (after the first activation of the compressor, the autostart function, if selected, will be always active).
Default: c9=0 => only one pump down cycle is run whenever the pump down valve is closed.
c10: Select pump down by pressure or by time
This parameter determines if the pump down procedure must end following the activation of the low pressure switch, or after a set time. In
this case, after the valve closes, the compressor works for time c7 or until the low pressure value is reached. When this time has elapsed, the
compressor is stopped, irrespective of the status of the low pressure input.
The Pd alarm (pump down ended by timeout) and the compressor autostart function in pump down are disabled
Default: c10=0 => pump down by pressure.
c11: Second compressor delay
This parameter determines the delay of the second compressor, compared to the main compressor, during start-up (‘H1 or
H5’=7). Vice-versa, the two compressors are stopped at the same time.
If two compressor steps have been selected (‘H1’=12, 13), the parameter c11 represents the delay for the activation of the second
step from the first.
Important: select the auxiliary output as a delayed compressor or second compressor step using parameter ‘H1 or H5’. Default:
c11=4 => 4 second delay.
ir33 +030220441 - rel. 2.5 - 16.06.10
39
ENGLISH
7.4 Defrost management parameters
Code
d0
dI
dt1
dt2
dt3
dP1
dP2
d3
d4
d5
d6
dd
d8
d8d
d9
d/1
d/2
dC
dC1
d10
d11
d12
dn
dH
Parameter
Type of defrost
Interval between defrosts
End defrost temperature, evaporator
End defrost temperature, aux evap.
End defrost temperature, evap. probe 3
Maximum defrost duration, evaporator
Maximum defrost duration, aux evap.
Defrost start delay
Enable defrost on start-up
Defrost delay on start-up
Display on hold during defrost
Dripping time after defrost
Alarm bypass after defrost
Alarm bypass after door open
Defrost priority over compressor protectors
Display of defrost probe 1
Display of defrost probe 2
Time base for defrost
Time base for alarm delay ’c6’ and ‘d8’
Compressor running time
Running time temperature threshold
Advanced defrost
Nominal defrost duration
Proportional factor, variation in dI
Model
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
MSYF
MSYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
UOM
flag
hours
°C/°F
°C/°F
°C/°F
min
min
Min
flag
min
min
hours
h/min
flag
°C/°F
°C/°F
flag
flag
hours
°C/°F
-
Type
C
F
F
F
F
F
F
C
C
C
C
F
F
C
C
F
F
C
C
C
C
C
C
C
Min
0
0
-50
-50
-50
1
1
0
0
0
0
0
0
0
0
0
0
0
-20
0
1
0
Max
4
250
200
200
200
250
250
250
1
250
2
15
15
250
1
1
1
250
20
3
100
100
Def.
0
8
4.0
4.0
4.0
30
30
0
0
0
1
2
1
0
0
0
0
0
1.0
0
65
50
Tab. 7.e
Important warning: afor the set times to become immediately operational, the instrument needs to be turned off and on again.
If this operation is not carried out, timing resumes operation the next time it is used.
d0: Type of defrost
For the instruments fitted with defrost relays:
• d0=0 electric heater defrost by temperature;
• d0=1 hot gas defrost by temperature;
• d0=2 electric heater defrost by time, Ed1 and Ed2 not displayed;
• d0=3 hot gas defrost by time, Ed1 and Ed2 not displayed.
• d0=4 eletrical heater temperature defrost by time, Ed1 and Ed2 not displayed.
Defrosts can be performed for all models:
• by temperature, using the defrost probe fitted on the evaporator. In any case, the defrost will be stopped after a maximum set
safety time (dP1 and dP2). The warnings Ed1 and Ed2, “end defrost due to maximum duration” (parameter ‘A8’) can be disabled;
• by time: without the defrost probe;
• by time with temperature control: based on the evaporator temperature, the function is similar to the mode where d0=0. Once
the temperatures dt1 and dt2 have been reached, the controller deactivates the defrost output and then reactivates it if the
related evaporator probes measure a temperature below dt1 and dt2 -1°C. This occurs for the entire duration of the defrost set
using the parameter dP.
Note:
• model S does not have a defrost relay, and consequently the defrost can only be performed by
stopping the compressor and selecting end of defrost by time or temperature. If the alarms Ed1 and Ed2 are not disabled, when
activated, they can be cancelled by pressing PRG and  together for more than 5 seconds. In any case, the signals Ed1 and Ed2
are reset automatically at the start of the next defrost operation.
• if control with two compressor steps is selected (with or without rotation, H1 or H5= 12 or 13) the defrost is performed acting
on both steps.
Default: d0=0 => electric heater defrost by temperature.
dI: Interval between defrosts
The defrosts are performed cyclically at an interval equal to the value of dI in hours (or minutes, see parameter dC), counted from
the end of the previous defrost. The duration of the defrost therefore does not therefore affect the interval between defrosts. The
interval dI is also maintained when the unit is OFF. If the interval dI expires when the controller is OFF, when it is started again a
defrost is performed.
If dI =0 => the defrost is never performed except when forced from the keypad (manual defrost), from the supervisor or from
the digital input (see parameter A4, A5, A9), or from the Real Time Clock.
Important: PTo ensure regular defrosts, the interval between defrosts must be greater than the maximum defrost duration, plus
the dripping time and post-dripping time.
Note: during the defrost, the temperature alarms are disabled.
Default: dI =8 hours.
dt1: evaporator end defrost temperature set point
This parameter is used to set the end defrost temperature, measured on the evaporator. In any case, the maximum defrost duration is
equal to the value, in minutes, set for parameter dP1.
• if when a defrost is requested, the temperature measured by the defrost probe on the evaporator is greater than the value set for
the end defrost, the cycle is not performed (including the dripping and post-dripping phases). The same is true for the defrost on
start-up, from digital contact, from RTC and from the keypad;
• if the defrost probe on the evaporator is faulty or disabled, the controller performs a timed defrost, with a duration equal to the
value set for parameter dP1;
• if the end defrost set point is not reached within the time set for parameter dP1, the defrost is stopped. If enabled (parameter A8),
the error signal Ed1 is displayed, which persists until the start of the next defrost cycle.
In the defrost by temperature, the parameter establishes the threshold for activating or deactivating the corresponding defrost relay.
Default: dt1=4°C.
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ir33 +030220441 - rel. 2.5 - 16.06.10
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dt2: end defrost temperature set point, auxiliary evaporator
dt2 acts in the same way as parameter dt1 described above, but referring to the auxiliary evaporator.
Note for dt1 and dt2: in the defrost by temperature, the parameter establishes the threshold for activating or deactivating the
corresponding defrost relay.
Default: dt2 =4°C.
‘dt3’: end defrost temperature SET POINT, probe 3 (hidden parameter)
This parameter is used to set the end defrost temperature measured by the third defrost probe. In any case, the maximum defrost
duration is equal to the value, in minutes, set for parameters ‘dP1’ and ‘dP2’.
• If there is just one only evaporator and 3 evaporator probes, the defrost starts if at least one probe measures a temperature
lower than the respective end defrost threshold; the defrost ends if all the probes have exceeded the corresponding end defrost
threshold;
• If there are two evaporators and 3 evaporator probes, the defrost is managed on the first evaporator with reference to evaporator
probe 1 and 3, on the second evaporator with reference to probe 2 and 3; the defrost starts on a evaporator if at least one associated probe measures a temperature lower than the respective end defrost threshold; the defrost ends if all the probes have
exceeded the corresponding end defrost threshold;
• If the third defrost probe has an error, the controller runs a timed defrost for a duration equal to the value set for parameters ‘dP1’
and ‘dP2’.
• If the end defrost set point is not reached within the time set for parameters ‘dP1’ and ‘dP2’, the defrost is stopped. If enabled
(parameter ‘A8’), errors ‘Ed1’ and ‘Ed2’ are displayed (with reference to the first evaporator or the auxiliary evaporator), which
persist until the start of the next defrost cycle.
In defrosts with temperature control, the value read by the third end defrost probe is not used.
Default: ‘dt3’=4°C.
dP1: Maximum evaporator defrost duration
Determines the maximum defrost duration on the evaporator in minutes (or seconds, see parameter dC) if defrost by temperature is
selected. If timed defrost has been selected, this is the actual duration of the defrost. Default: dP1=30 minutes.
dP2: Maximum defrost duration, auxiliary evaporator
As for parameter dP1 described above, but refers to the auxiliary evaporator.
Default: dP2=30 minutes.
d3: Defrost start delay
This parameter determines the time that must elapse, when the defrost is activated, between the
stopping of the compressor (electric heater defrost) or the starting of the compressor (hot gas defrost), and the activation of the
defrost relays on the main and auxiliary evaporators.
The delay d3 is useful, in the hot gas defrost, to ensure a sufficient quantity of hot gas for the defrost before the activation of the cycle
reversing valve, in very special applications (see paragraph “Description of software functions”). Default: d3=0 minutes.
d4: Defrost when the instrument is switched on
Activates a defrost when the instrument is switched on.
Warning: this request has priority over the activation of the compressor and the continuous cycle.
The possible values are:
d4=0, no defrost is performed when the instrument is switched on;
d4=1, a defrost is performed when the instrument is switched on.
Starting a defrost when the instrument is switched on may be useful in special situations.
Example: frequent power drops occur in the system, which cause the internal clock to be reset. This clock calculates the interval
between two defrosting operations, restarting from zero. If the frequency of the power failure were, in an extreme case, greater
than the defrost frequency (e.g. a power failure every hour, against a defrost every 10 hours) the controller would never perform a
defrost. In a situation of this type, it is preferable to enable defrost on start-up, above all if the defrost is controlled by temperature
(probe on the evaporator), therefore avoiding unnecessary defrosts or at least reducing the running times. In the case of systems
with a large number of units, if selecting defrosts at start-up, after a power failure all the units will start defrosting, thus causing a
voltage overload. To overcome this, the parameter d5 can be used. It adds a delay before the defrost, and this delay must obviously
be different for each unit.
Default: d4=0 the instrument does not perform a defrost on start-up.
Available on all models except for IR33M.
d5: Defrost delay when the instrument is switched on or from multifunction input
The time that must elapse between start-up of the controller and the start of the defrost.
• if the digital input is used to enable the defrost (see parameter A4, A5, A9=3) or to start a defrost from external contact (see
parameter A4, A5, A9=4), the parameter d5 refers to the delay between enabling of the defrost or request to enable, and the
effective start.
• the defrost digital input (see parameter A4, A5, A9) can be usefully employed to perform defrosts in real time, connecting a timer
to the input. The defrost will be activated when the timer contact closes.
• If several units are connected to the same timer, parameter d5 should be used to delay the various defrosts, thus avoiding power
overloads.
In addition, to avoid unwanted defrosts started by the clock inside the instrument, set parameter dI=0 (manual defrosts only,
started from the keypad, by the RTC, by the calculation of the compressor running time or by the multifunction contact).
Important warning: when connecting a series of units to the same timer, the best solution is to insulate all the contacts galvanically, fitting intermediate relays for each contact.
Default: d5=0 => no delayed defrost when switching the instrument on or following the activation of the multifunction input.
ir33 +030220441 - rel. 2.5 - 16.06.10
41
ENGLISH
d6: Display during defrost
Specified values:
• d6=0 => during the defrost the instrument displays the text dEF alternating with the value read by the probe selected using
parameter /tI. This is to signal that any high temperature values are due to the defrost procedure in progress.
• d6=1 => during the defrost the last temperature shown before the start of the cycle remains on the display. The display
returns to normal when the control temperature reaches the set point, the temperature to be displayed is less than the value
locked on the display or, in any case, after the time set for the “alarm bypass after defrosting” (d8).
• d6=2 => during the defrost the instrument displays the text dEF steady on the display.
Note: in OFF and REVERSE modes, the display is unlocked after the defrost.
Default: d6=1 => during the defrost the last temperature read before the start of the cycle remains on the display, both on the
built-in terminal and on the remote terminal.
dd: Dripping time
This parameter is used to stop (in minutes) the compressor and the evaporator fans after a defrost to facilitate evaporator dripping.
If dd=0 => there is no dripping time, therefore, at the end of the defrost the control functions start immediately. Default: dd=2
minutes.
Note: if control with two compressor steps is selected (with or without rotation, H1 or H5= 12 or 13) the dripping acts on both steps.
d8: Alarm bypass time after defrost and/or door open
Indicates the time (in hours or minutes) that the high temperature alarm signal is ignored from after the end of a defrost cycle or
from when the door to the cold room is opened, if the Multifunction input is connected to the “door switch” (see parameters A4,
A5 and A9).
Important: parameter ‘d8’ can be expressed in hours ‘dC1’=0 (default) or minutes ‘dC1’=1.
Parameter dC1 is masked and consequently not visible.
Default: d8 =1 hour bypass.
d8d: Open door alarm delay.
This indicates the delay to signal that the door is open, if the multifunction input is connected to the “door switch” (see parameter
‘A4’, ‘A5’ or ‘A9’). If ‘d8d’= 0, parameter ‘d8d’ is disabled and the open door alarm delay returns to ‘d8’. Default: ‘d8d’=0 disabled.
d9: Defrost priority over compressor protective devices
Ignores the compressor protection times at the start of the defrost. Compressor protection times:
• c1: minimum time between 2 successive starts;
• c2: minimum OFF time;
• c3: minimum operating time.
d9 = 0 the protection times are respected
d9 = 1 the protection times are not respected. Therefore, defrost has higher priority and the compressor times are ignored.
In the hot gas defrost, this is useful to avoid delaying the start of the defrost if the compressor has just stopped and there is a minimum time between two starts of the compressor. Remember, however, that in this event the maximum number of compressor
starts per hour may not necessarily be respected.
Warning: if the defrost requires the activation of the compressor (hot gas defrost) and parameter d9=1, the compressor may risk
being damaged due to an excessive number of close starts.
Default: d9=0 => the defrost respects the compressor times (however by default these are set to zero).
d/1: Defrost probe 1 reading
This parameter is used to display the value measured by defrost probe 1 (on the instruments where this is fitted), by pressing SET.
If defrost probe 1 is disabled, three horizontal dashes ‘_ _ _’ will be displayed.
d/2: Defrost probe 2 reading
As for parameter d/1 described above, but refers to defrost probe 2.
dC: Time base
Used to modify the measurement unit used to count the times set for parameters dI (defrost interval), dP1 and dP2 (defrost duration).
dC=0 =>dI expressed in hours, dP1 and dP2 in minutes.
dC=1 =>dI expressed in minutes, dP1 and dP2 in seconds.
The parameter dC=1 can be used to test defrost operation at shorter times. In addition, it is useful for using the instrument to
manage air driers. The defrost cycle then becomes the condensate discharge cycle, which must be performed at close intervals
(minutes) and for short durations (seconds).
Default: dC=0 =>dI expressed in hours, dP1 and dP2 in minutes.
‘dC1’: Time base for alarm delay ‘c6’ and ‘d8’ (hidden parameter)
Changes the unit of measure used to count the times for parameters ‘c6’ (alarm bypass after continuous cycle) and ‘d8’ (alarm
bypass after defrost and door open).
‘dC1’=0 =>‘c6’ and ‘d8’ in hours.
‘dC1’=1 =>‘c6’ and ‘d8’ in minutes.
Important: when the timers are selected in minutes, the error on timers ‘c6’ and ‘d8’ is 0..+1 minuti.
Default: ‘dC1’=0 => ‘c6’ and ‘d8’ in hours.
d10: Compressor running time
This parameter indicates the compressor operating time in hours, with the temperature below the
threshold indicated by the parameter d11, after which a defrost request is generated. Setting d10=0 disables the function.
Note: if control with two compressor steps is selected (with or without rotation, H1 or H5= 12 or 13) the compressor running
time is only calculated on the first step.
Default: d10=0 => Function disabled.
d11: Running time temperature threshold
This parameter indicates the evaporation temperature below which the compressor must continue to operate for the time d10 in
order to generate a defrost request. Default: d11 =1 => 1°C.
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ir33 +030220441 - rel. 2.5 - 16.06.10
d12
0
1
2
3
Skip defrost
ENGLISH
d12: Advanced auto-adapting defrosts
This parameter is used to enable and disable the advanced defrost function, as per the following table:
Automatic variation of dI
Disabled
Disabled
Enabled
Enabled
Disabled
Enabled
Disabled
Enabled
Tab. 7.f
Default: d12 =0 => Both the functions are disabled.
dn: Nominal defrost duration
This indicates the average duration of the defrost in normal operating conditions. It is expressed as a percentage, with reference to
parameters dP1 and dP2, according to the following formulae:
dn1
dn
100
dP1 and dn2
dn
100
dP2
Example: with dn=65, dP1=90 min. and dP2=120 min.
Nominal defrost duration on main evaporator: 59 min.
Nominal defrost duration on auxiliary evaporator: 78 min.
Default: dn=65 => 65% of dP1 or dP2
dH: Proportional factor in the variation of the defrost interval
This parameter is used to increase or decrease the influence of the effective duration of the defrost, in relation to the nominal
duration, in the algorithm that manages the automatic variation of the defrost interval. By setting dH=0, the effective duration has
no influence on the duration of the defrost interval. Vice versa, dH = 100 achieves maximum efficiency. Default: dH=50
7.5 Alarm management parameters
Code
Parameter
Model
UOM
Type
Min
Max
Def.
A0
A1
AL
AH
Ad
A4
Alarm and fan differential
Type of threshold AL and AH
Low temperature alarm threshold
High temperature alarm threshold
Low and high temperature signal delay
Digital input 1 configuration (DI1)
A5
A6
A7
A8
A9
Ado
Ac
AE
Acd
AF
ALF
AdF
Digital input 2 configuration (DI2)
Stop compressor from external alarm
External alarm detection delay
Enable alarms Ed1 and Ed2
Digital input 3 configuration (DI3)
Light management mode with door switch
High condenser temperature alarm
High condenser temperature alarm differential
High condenser temperature alarm delay
Light sensor OFF time
Antifreeze alarm threshold
Antifreeze alarm delay
MSYF
MSYF
MSYF
MSYF
MSYF
-SYF
M--MSYF
-SYF
-SYF
-SYF
°C/°F
flag
°C/°F
°C/°F
min
min
min
flag
flag
°C/°F
°C/°F
min
sec
°C/°F
min
C
C
F
F
F
C
C
C
C
C
C
C
C
C
C
C
C
C
C
0.1
0
-50
-50
0
0
0
0
0
0
0
0
0
0.0
0.1
0
0
-50
0
20
1
200
200
250
14
14
14
100
250
1
14
1
200
20
250
250
200
15
2.0
0
0.0
0.0
120
0
3
0
0
0
0
0
0
70.0
5.0
0
0
-5.0
1
MSYF
-SYF
-SYF
-SYF
-SYF
MSYF
MSYF
Tab. 7.g
Note: par. A9 refers to the instruments with 3 digital inputs (ir33DIN, powercompact and MasterCella).
Important warning: for the set times to become immediately operational, the instrument needs to be turned off and on again. If
this operation is not carried out, timing resumes operation the next time it is used.
A0: Alarm and fan differential
This is the differential used for disabling high and low temperature alarms (AL and AH - see Figure 7.i) and for managing the fans
(see the F parameters). In the event of an alarm, as can be seen from the figure, the value of A0 in part determines the effective
activation points of the temperature alarms. Default: A0=2.0 degrees.
A1: Type of threshold AL and AH
Used to select whether the values of parameters AL and AH are considered absolute thresholds or relative to the value of the set point.
A1 = 0 => AL and AH are considered as relative thresholds.
A1 = 1 => AL and AH are considered absolute thresholds.
Default: A1 = 0 => AL and AH are considered relative thresholds.
AL : Minimum temperature alarm
This is used to determine the activation threshold for the low temperature alarm.
Relative threshold for low temperature alarm = (set point) - (value of AL)
AL=0 => Alarm disabled;
Absolute threshold for low temperature alarm = value of AL.
AL=-50 => Alarm disabled.
Important: If the threshold AL is selected as relative, the value for disabling the alarm is 0, while if selected as absolute, the alarm
disabling value is -50.
Warnings for the relative threshold:
The value of AL does not indicate the actual alarm temperature, but the maximum permissible deviation from the set point; changing the set point automatically changes the low temperature alarm, while the maximum deviation allowed (=AL ) remains fixed.
Note: the low temperature alarm features automatic reset (this means that if the temperature returns above the minimum value
set, the alarm signal is cancelled automatically).
ir33 +030220441 - rel. 2.5 - 16.06.10
43
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Warnings for using the continuous cycle
The low temperature alarm is also used in the continuous cycle (see the description of parameter cc’.
In fact, if the temperature falls to the alarm level, the continuous cycle is stopped automatically, even if the selected time has not
yet elapsed. This deactivation, however, does not involve an alarm signal.
Default: AL =0 => low temperature alarm disabled.
Note: for the control probe alarm, the low temperature alarm is reset and monitoring reinitialised.
allarme bassa temperatura
allarme alta temperatura
A0
AH: High temperature alarm
This is used to determine the activation threshold for the high temperature alarm.
Relative threshold for high temperature alarm = (set point) + (value of AH)
AH=0 => Alarm disabled;
Absolute threshold for high temperature alarm = value of AH.
AH=200 => Alarm disabled.
Important: if the threshold AH is selected as relative, the value for disabling the alarm is 0, while if selected as absolute, the
alarm disabling value is 200.
Warnings for the relative threshold:
• the value of AH does not indicate the alarm temperature, but the maximum permissible deviation from the set point; consequently, changing the set point automatically changes the high temperature alarm, while the maximum deviation allowed
(=AH) remains fixed.
Warnings:
• the high temperature alarm has automatic reset: this means that if the temperature returns above/below the minimum value
envisaged, the alarm signal is cancelled automatically
• in the event of a control probe alarm, the high temperature alarm is reset and monitoring reinitialised.
Default: AH=0 => high temperature alarm disabled.
0A
AL
set point
Fig. 7.i
Ad: Temperature alarm delay
Indicates after how many minutes the temperature alarm is signalled when the temperature threshold is exceeded.
Warnings:
• Setting a delay for signalling the temperature alarm may help eliminate false alarms due to interference on the probe signal or
brief situations (for example, the door to the cold room opened for a short period);
• no temperature alarms are generated during the defrost and continuous cycle procedures;
• the temperature alarm is delayed by the time d8 after the defrost and by the time c6 after the continuous cycle. At the end of these
two times, the temperature alarm, if detected, is signalled without waiting for the time set for Ad. If d8 and c6 are set to zero, the
temperature alarm is signalled after the time Ad;
• as already indicated by the default value for parameters AL and AH, the instruments are programmed in the factory with the
relevant thresholds, and the high and low temperature alarms are disabled. The alarms, when enabled, activate the buzzer, if
enabled, and show a code on the display: HI for the high temperature and LO for the low temperature alarm.
The following conditions generate the temperature alarms:
• high temperature alarm: the temperature measured by the virtual control probe is above the threshold set for parameter AH;
• low temperature alarm: the temperature measured by the virtual control probe is below the threshold set for parameter AL.
Default: Ad=120 => 120 minute delay for the temperature alarms.
A4: Multifunction digital input configuration
In the ir33 series, this parameter and the model of controller used define the meaning of the multifunction digital input.
The possibilities are described below:
A4=0 Input not active: the multifunction digital input is not used and is the factory-specified configuration for all versions.
A4=1 Immediate external alarm: the digital input can be connected to an external alarm that requires immediate activation (for
example, high pressure alarm or compressor thermal overload). Specifically, the alarm is detected when the contact opens (normal
operation with contact closed). The activation of the alarm:
• shows the message on the display (IA);
• activates the buzzer, if enabled;
• activates the alarm relay, if selected;
• involves the following actions on the actuators:
- compressor: operates depending on the values assigned to parameter A6 (stop compressor from external alarm).
- fans: continue to operate according to the fan parameters (F).
When stopping the compressor, the minimum ON time (c3) is ignored. When the alarm stops, the
defrost and continuous cycle can be performed again, and the compressor returns to normal operation.
Important warning: remember that in order to ensure the safety of the unit in the event of serious alarms, all the electromechanical safety devices required to guarantee correct operation must be fitted on the unit.
Note:
• if more than one digital input is configured as the immediate alarm, the alarm will be generated when at least one of the inputs
is open.
• if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13) the immediate external alarm acts
on both steps.
A4=2 Delayed external alarm
The delayed external alarm is equivalent to the immediate external alarm (A4=1), except that this alarm is signalled after the
time A7 from when it is detected (‘dA’ signal). This configuration is especially useful for managing the low pressure alarm. In fact,
when starting for the first time, the unit often detects a low pressure alarm due to the environmental conditions rather than the
malfunctioning of the unit.
Setting a delay for the alarm will avoid false signals. In fact, by suitably calculating the delay, if the low pressure is due to environmental conditions (low temperature), the alarm will be automatically reset before the delay has elapsed.
Note:
• if ‘A7’=0, the activation of the alarm does not cause the compressor to operate according to the values assigned to the parameter
‘A6’ (stop compressor from external alarm); on the other hand, the ‘dA’ signal is displayed, the icon flashes, the buzzer and the
alarm relay (if selected) are activated;
the delayed external alarm is thus signal-only.
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ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
• both the immediate and delayed external alarm have automatic reset;
• if more than one digital input is configured as the delayed alarm, the alarm will be generated when at least one of the inputs is open;
• if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13) the delayed external alarm acts
on both steps.
A4 =3 The meaning varies according to the model used
Version ir33M = probe selection
This is used to exploit the digital input in order to show, on the display, the probe selected by parameter /tI or the first enabled
probe (see parameters /A2, /A3, /A4, /A5). In practice, if the contact is open, the probe selected by parameter /tl is shown,
whereas, if the contact is closed, the first enabled probe is shown.
For all other models = Defrost enabling
An external contact can be connected to the multifunction input to enable or inhibit the defrost.
• Contact open: the defrost is inhibited. Contact closed: the defrost is enabled.
• Contact closed without request from the controller: the defrost is not performed.
• Contact closed and defrost in progress: when the digital input is opened, the defrost is immediately stopped and the unit
restarts normal operation (without performing the dripping or post-dripping phases). The LED starts flashing to indicate that
the defrost request is pending, awaiting the next enabling signal (closing of the contact), when the defrost will be performed
completely.
Suggestion: this function is useful in the following situations, for example:
- multiplexed showcases with hot gas defrost. In these systems, defrosts must be performed by “islands”, and therefore, at any one
time, some islands are enabled to be defrosted, while others are disabled;
- to prevent defrosts on the units accessible by the public during opening times. Any defrost request arriving when the contact is
open will remain pending until the contact closes.
A4 = 4 Start defrost from external contact
This function used to start the defrost from an external contact.
If dI=0 and no defrost enabling signal related to the clock is set, the defrost can only be performed on start-up, from the digital
input, by the supervisor and from the keypad. This function is useful to run real time defrosts. To perform the defrosts, connect a
cyclical, mechanical or electronic timer to the digital input: When the contact on the timer closes, the defrost request is sent.
As seen in the description of parameter d5, a series of units can be connected to the same timer.
Important warning for versions operating on 12Vac and 12-24Vac
When connecting a series of units to the same timer, the best solution is to insulate all the contacts galvanically, inserting an
intermediate relay for each contact. Setting a different value for d5 on each unit will avoid simultaneous defrosts.
Note: if more than one digital input is configured to enable the defrost, the defrost will be disabled when at least one of the
inputs is closed.
A4 = 5 Door switch with compressor and fan stop
Setting A4=5 manages the cold room door switch. The behaviour of the door switch depends on whether the door is opened
with the light OFF or light ON. The need to differentiate the two operating modes is mainly designed for controlling display cases
and cold rooms.
Case 1 - door opened with light OFF:
If the door is opened with the light OFF:
• the compressor and evaporator fans are switched off (to stop the fans only, set parameter A4=9);
• in the models fitted with an auxiliary relay programmed as the light output, the light is switched on;
• the reading displayed and the icon flash;
• the temperature alarms are disabled.
If the door remains open for longer than time d8, the controller restarts normal operation:
• compressor and fan ON, if requested;
• light ON (the auxiliary relay is selected as the light);
• the buzzer and the alarm relay are activated;
• the temperature alarms are enabled;
• the reading flashes.
To stop the reading from flashing, close the door. When the door is closed, the controller returns to normal operation, switching off
the light and enabling the temperature alarm after the delay time d8. The compressor is re-started observing any protection times
selected (see the C parameters).
Case 2: door opened with light ON:
SAssuming the user enters the cold room, turning on the light before entering, closing the door behind him, and then exits the room,
closing the door a second time. When the door is opened:
• the compressor the evaporator fans are switched off (to stop the fans only, set parameter A4=9);
• the light stays on (only in the models fitted with an auxiliary relay programmed as the light output);
• the reading displayed and the icon flash;
• the temperature alarms are disabled
When the door is closed the first time, the controller maintains the previous situation. When the door is closed the second time,
the controller returns to normal operation, switching off the light and enabling the temperature alarm after the delay time d8.
The compressor is re-started, observing any protection times selected (see the C parameters).
If the door remains open for a time longer than d8, the controller returns to normal operation:
• compressor and fan ON, if requested;
• light OFF;
• the reading flashes;
• the buzzer and the alarm relay are activated;
• the temperature alarms are enabled;
• when the door closes the temperature alarm delay d8 is not set.
If, after being closed for the first time, the door remains closed for longer than time d8, or if the light is switched off manually, the
controller restarts normal operation:
• compressor and fan ON, if requested;
• light OFF;
• the temperature alarms are enabled;
• the temperature alarm delay d8 is set.
ir33 +030220441 - rel. 2.5 - 16.06.10
t
timer
defrost
dP (1)
unit 1
d5 (2)
defrost
dP (2)
unit 2
defrost
d5 (3)
dP (3)
defrost request
Fig. 7.l
Key:
t=
impulse from the timer to start the defrost:
the minimum duration must be 0.5 s.
dP (1)= maximum defrost duration on unit 1.
dP(2)= defrost delay from external contact for unit 2,
higher than dP(1) to prevent overlapping defrosts.
Same for d5(3) and dP(3).
45
unit 3
ENGLISH
If after the door is first closed the light is switched off manually, the controller resumes normal operation.
Note:
1. if the light was previously switched on manually, when the door is closed for the second time, it is automatically switched off ;
2. if more than one digital input is configured as the door switch, the door open status will be considered when at least one of
the inputs is open;
3. if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13), opening the door deactivates
both steps.
Warning: even when the fan is managed by the fan controller (see the F parameters), the fans are forced to stop when the door is
open. This algorithm resolves any problems relating to faults or malfunctions of the “door switch”.
A4 =6 Remote ON/OFF
The digital input can also be programmed as a remote ON/OFF switch. When the contact is closed, the controller is ON.
When the controller is OFF:
• the temperature is displayed alternating with the message OFF;
• the internal timer for parameter dI is updated. If dI expires when the unit is OFF, a defrost is performed when the unit is
switched on again;
• the auxiliary relay set as AUX or LIGHT remains active;
• the buzzer and the alarm relay are de-activated;
• the controller does not perform the control functions, defrosts, continuous cycle, signal the
temperature alarms and all other functions;
• the compressor protection times are observed;
• when the instrument is switched back on, all the functions are re-activated, with the exception of defrost on start-up, compressor and fan delay on start-up.
Contact closed => ON.
The ON/OFF from external digital input has priority over the keypad and the supervisor.
If A4, A5, A9=6, the controller is ON with all the contacts closed
Note:
• if more than one digital input is configured as the remote ON/OFF, the OFF status occurs when at least one of the inputs is open;
• if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13), the OFF status deactivates both steps.
A4 =7 Curtain switch
If the input is selected as a curtain switch, the controller modifies the set point when the contact closes, adding the value of
parameter r4; the new value is then used for all the functions relating to the set point (e.g. relative high and low temperature
alarms, control with dead band, control with two compressor steps, etc.).
When r4=3.0 (default value), the set point is increased by 3 degrees from the value used when the curtain is open.
Contact closed => curtain lowered.
If one of the auxiliary outputs is used to manage the light, lowering the curtain automatically switches the light off, while raising
it switches the light on.
Note: if more than one digital input is configured as a curtain switch, the curtain open status occurs when at least one of the
inputs is open.
A4 = 8 Low pressure switch input for pump down
The low pressure alarm LP is signalled when the pressure switch signals a low pressure situation with the pump down valve
open and the compressor on, if the pump down function is active, or when the compressor is on. The low pressure alarm signal is
nonetheless delayed by the time in minutes set for parameter A7.
The low pressure alarm ‘LP’ door stops the compressor. This parameter, together with parameters c7, c8, c9, H1 and H5, allows
management of the pump down algorithm.
Note: if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13), the low pressure alarm
deactivates both steps.
Contact open => low pressure.
Important: If c7=0 (pump down disabled), the low pressure situation can still be detected. If more than one digital input is
configured as the low pressure switch input, the low pressure alarm is activated when at least one of the inputs is open.
A4 =9 Door switch with fan stop only
Same as for option A4=5, with the difference being that when opening the door, only the fans are stopped, rather than the
compressor and the fans.
Note: if more than one digital input is configured as the door switch, the door open status occurs when at least one of the inputs
is open.
A4=10 Direct/Reverse operation
The digital input is used to select direct operation (cooling), contact open, or reverse operation (for heating), contact closed. For
example, a switch can be connected t select heating or cooling operation.
Depending on the value of parameter r3, the following configurations are possible:
when r3=0 Contact open = direct operation with defrost control;
Contact closed = reverse operation.
When r3 =1 or r3 =2;
Contact open = direct operation;
Contact closed = reverse operation.
WARNING: if A4=10, the status of the digital input has priority over the parameter r3, that is, the value assigned to parameter r3 is
ignored and only the status (open or closed) of the digital input is considered.
Note:
1. if more than one digital input is configured as direct/reverse, the direct status occurs when at least one of the inputs is open;
2. the status of digital input selected as direct and reverse has priority over the operating mode set using parameter ‘r3’;
3. if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13), the DIRECT or REVERSE status
alarm acts on both steps.
A4 =11 Light sensor
The digital input is used to read a light sensor (actually an analogue input, from which a digital signal is taken using the parameter or
threshold of the light sensor). The light sensor may be located:
• in the door stop,
• inside the cold room or cabinet.
Fig. 7.m
46
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
In the first case, , the sensor signals the opening and the closing of the door, because, with the door open, light is signalled, and
with the door closed, darkness is signalled (the sensor is located in the door stop and thus will be shadowed when the door is
closed). The inside light will be automatically switched on when the door is open and switched off when the door is closed. The
light stays OFF for a minimum time of 5 seconds, to avoid rapid, successive impulses of the light relay.
To select this operating mode, set AF=0.
In the second case, the light sensor signals the opening of the door of the cold room or the cabinet due to the outside light that
the sensor detects, thus activating the inside light. The closing of the door is measured by time, as the light inside the cold room
or cabinet will illuminate the sensor. After time AF (greater than 0), the inside light is switched off for 5 seconds. If the light sensor
signals darkness, the door must be closed and the light will therefore remain OFF. Otherwise, the door is still considered open and
the light is switched on again. To select this operating mode, set AF>0.
A4 =12 Activation of the AUX output
The digital input is used to activate/deactivate the AUX output, if configured with parameter H1 or H5, with the following logic:
Digital input
open
close
AUX output
deactivation
activation
Tab. 7.h
The output is activated/deactivated on closing/opening the contact, to make this operating mode
compatible with the presence of the AUX button and the control signal from the supervisor.
Note: if more than one digital input is configured as AUX, the open status occurs when at least one of the inputs switches to open
status.
A4 =13 Door switch with compressor and fans off and light not managed.
Same as for A4=5, with the difference that the light output is not modified.
Note:
1. the door management algorithm depends on the parameter ‘Ado’.
2. if more than one digital input is configured as the door switch, the door open status will be considered when at least one of
the inputs is open.
A4 =14 Door switch with fans only off and light not managed.
Same as for A4=9, with the difference that the light output is not modified.
Note: for A4/5= 13 or 14: the Ado door management algorithm is used in both cases.
Default: A4=0 => Digital input not active (for all other models).
The table below summarises the functions of the digital input corresponding to the value assigned to the variable A4.
Value of A4
0
1
2
3
Function
input not active
immediate external alarm
delayed external alarm
for model M, select probes
3
4
5
6
7
8
9
10
11
12
13
other models, enable defrost
start defrost
door switch with compressor and fans OFF
remote ON/OFF
curtain switch
low pressure switch
door switch with fans OFF only
direct / reverse
light sensor
activation of AUX output
door switch with compressor and fans off, light not
managed
door switch with fans only off, light not managed
14
Function active
LED on
open = alarm
open = alarm
open = probe selected by parameter /tI closed =
first probe enabled
closed= enabled
closing = defrost request
open = door open
open = instrument off
closed = curtain closed
open = low pressure
open = door open
open = direct
above the threshold = off
open = deactivation
open = door open
open
open
open = door open
Tab. 7.h
Note:
• if more than one digital input is configured in the same way, the activation of the associated function will be enabled if at least
one of these is open.
• for control with two compressor steps (with or without rotation, H1=12 or 13) the function associated with the digital inputs is
activated on both.
A5: Configuration of the second multifunction digital input.
For this parameter the same description relating to parameter A4 is valid, obviously referring to the second digital input. Default:
A5=0 => Digital input not active.
A6: Stop compressor from external alarm (multifunction input)
The meaning of this parameter is similar to that of parameter c4 (duty setting).
If an external alarm occurs (immediate or delayed), the compressor works for a time equal to the value set for parameter A6 (in
minutes), while it remains OFF for a fixed period of 15 minutes.
Special cases:
A6=0 the compressor is always OFF;
A6=100 the compressor is always ON.
The fans continue to be managed according to the set parameters (see category F). If duty setting for the probe alarm (parameter
c4) is also active, the controller uses the value of A6.
Note: if control with two compressor steps is selected (with or without rotation, H1, H5 = 12 or 13), the stop compressor acts on
both steps.
Default: A6=0 => compressor OFF in the event of external alarms.
ir33 +030220441 - rel. 2.5 - 16.06.10
47
ENGLISH
A7: Delay in detecting the external alarm (multifunction input)
Establishes the delay (in minutes) in detecting an external alarm, if selected as a delayed external alarm (A4, A5=2) or the signal
of the low pressure (LP) alarm).
Note: if A7= 0, in the event of delayed alarms from digital input (A4 or A5 or A9= 2), the controller does not act on the control
outputs.
A8: Enable signals Ed1 and Ed2
The alarms Ed1 and Ed2 signal the end of the defrost due to maximum duration of the defrost time dP1/dP2 and can be disabled
by setting A8=0. The warnings Ed1 and Ed2, if enabled, are cancelled at the start of the following defrost or can be reset manually
by pressing the PRG  and AUX buttons for more than 5 seconds. Default: A8=0 => warnings Ed1 and Ed2 disabled.
A9: Configuration of the third multifunction digital input (ir33DIN models H only)
For this parameter the same description relating to parameter A4 is valid, obviously referring to the thirs digital input. Default:
A9=0 => Digital input not active.
Ado: Light management mode with door switch (masked parameter)
This parameter is used to select the algorithm for managing the door.
Ado
0
1
Light when opening the door
off
on
off
on
Algorithm
normal
extended
extendednormal
Description
open-close
open-close-open-close
open-close-open-close
open-close
Tab. 7.i
Note: if the digital input is selected so as not to manage the light (A4, A5 = 13 or 14) the algorithm is modified as
follows:
Default: Ado =0 => Normal algorithm.
Ac: Condenser high temperature alarm
If a probe is set as the condenser probe, the condenser temperature can be monitored to signal the high temperature alarm,
probably due to obstruction or fouling. If the condenser temperature is > Ac+ (AE/2), the pre-alarm is signalled, displaying the
alarm message cht. If in the pre-alarm situation, the condenser temperature falls to < Ac, the pre-alarm is reset and the signal
cht is cancelled. If the condenser temperature increases to > Ac + AE, the alarm CHt is activated and the compressor is stopped.
This alarm is delayed by the time Acd, from when the alarm threshold AC is exceeded. The alarm can only be reset manually. In the
event of a condenser probe fault, the alarm and pre-alarm are activated.
Note: if control with two compressor steps is selected (with or without rotation, H1= 12 or 13) the high condenser temperature
alarm acts on both steps.
Important:
1. if no condenser probe is selected, the condensing temperature alarm and pre-alarm are disabled.
2. the condenser fans can be controlled in on/off mode; for this function, refer to parameters F4 and F5.
Default: Ac=70.0 degrees.
AE: High condenser temperature alarm differential
This is the differential used for activation of the high condenser temperature alarm and control of the condenser fans.
Default: AE=5.0.
Acd: Condenser high temperature alarm delay
The parameter Acd can be used to set a delay on the activation of the condenser high temperature alarm. When the threshold
Ac + AE is exceeded, the alarm delay timer is started. If, when the delay time Acd has elapsed, the temperature is still above the
threshold, the alarm CHt is activated.
If the condensing temperature falls below Ac, the timer is reset and the alarm CHt is not displayed.
Default: Acd=0 => 0 minutes, immediate high condenser temperature alarm.
AF: Light sensor OFF time
Used to manage the light sensor, connected to a digital input, as:
AF= 0
sensor in the door stop
AF> 0
sensor inside the cold room or cabinet
When AF=0 the inside light is switched on when the sensor detects light, and is switched off when the sensor detects darkness.
The light is switched off for a minimum of 3 seconds, so as to avoid close successive impulses of the light relay.
Note: the sensor must be positioned so as to detect darkness when the door is closed.
When AF>0, the inside light is switched on when the sensor detects light. After a time in seconds equal to AF, the light is
switched off for 5 seconds to check if the door has been closed. If darkness is detected, the inside light remains OFF, but if light is
detected, the inside light is switched back on (after a
minimum time of 3 seconds) and the same cycle starts again. Default: AF = 0.
48
ir33 +030220441 - rel. 2.5 - 16.06.10
Allarme “CHt” e off refrigerazione (ripristino manuale)
“AC” - “AE”/2
“Ac-AE”
AdF: Antifreeze alarm delay.
Sets the delay for detecting the antifreeze alarm.
Default: AdF= 1.
“Ac” temp. condensatore
Preallarme
solo visualizzazione allarme “cht”
(ripristino automatico)
Fig. 7.m
ON
“Ac”
Fig. 7.n
ir33 +030220441 - rel. 2.5 - 16.06.10
49
“AE”
temp. condensatore
ENGLISH
ALF: Antifreeze alarm threshold
Defines the temperature value below which the antifreeze alarm is detected, with the message AFr.
The function is active if a probe has been set as an antifreeze probe, /A2, /A3, /A4, /A5= 4 and is delayed by the time set for
parameter AdF.
The antifreeze alarm stops the compressor and activates the alarm relay, if H1 or H5=0, 1, and has manual reset.
The antifreeze alarm stops the compressor (stops cooling operation) and activates the alarm relay, if ‘H1’=0, 1 or ‘H5’=0, 1.
The alarm is reset manually or from the supervisor.
Note: if control with two compressor steps is selected (with or without rotation, H1 = 12 or 13) the antifreeze alarm acts on both
steps.
Default: ALF= -5.0.
ENGLISH
7.6 Fan management parameters
Code
F0
F1
F2
F3
Fd
F4
F5
Parameter
Fan management
Fan start temperature
Fan OFF with compressor OFF
Fans in defrost
Fan OFF after dripping
Condenser fan stop temperature
Condenser fan start differential
Models
---F
---F
---F
---F
---F
MSYF
MSYF
UOM
flag
°C/°F
flag
flag
min
°C/°F
°C/°F
Type
C
F
C
C
F
C
C
Min
0
-50
0
0
0
-50
0.1
Max
2
200
1
1
15
200
20
Def.
0
5.0
1
1
1
40
5.0
Tab. 7.l
The ir33 series controllers manage the evaporator fans in the following modes:
• always ON;
• ON only when the compressor is ON;
• ON according to evaporator and room temperature.
F0: Fan management
The fans can be always on or managed by the “fan controller”, which controls them according to the temperature measured by the
defrost and virtual control probes.
The evaporator fans can be stopped in the following situations:
• when the compressor is OFF (see parameter F2);
• during defrosts (see parameter F3);
• during the dripping period (see parameter dd);
• and for a further post-dripping period (see parameter Fd);
• in defrost they can be on or off (see parameter F3).
The following values are allowed for this parameter:
F0=0 fans always ON;
F0=1 fans controlled according to the temperature difference between the virtual control probe and the evaporator temperature;
F0=2 fans controlled according to the evaporator temperature.
Warning: remember that if a dripping period is set (dd=0), the fans are stopped irrespective of the value of F0.
Default: F0=0 => fans always ON, not managed by the “fan controller”.
F1: Fan start temperature (parameter valid only if F0 =1 or 2)
When F0=1, parameter F1 indicates the minimum difference between room temperature and evaporator temperature for the fans
to be started. Therefore, when:
• evaporator temperature < (virtual probe – F1-A0), the fans are ON;
• evaporator temperature > (virtual probe – F1), the fans are OFF.
When stopped, the fans can start again when the difference between the two probes is equal to F1+A0, where A0 is the “fan
controller” differential (see Figure 7.o).
When F0=2, parameter F1 indicates the absolute temperature for starting the fans, that is:
• evaporator temperature < (F1-A0), the fans are ON;
• evaporator temperature > (F1), the fans are OFF.
Notes:
• if there are two evaporators and therefore two evaporator probes, control will be performed using the maximum value read by
the two probes, to ensure that the fans are started when both evaporators reach the set temperature.
• in the event of errors on the control probes, the fans are always on.
Default: F1=5 =>(if F0=1 or 2), the fans remain ON while the evaporator is 5 degrees colder than the room temperature.
temperatura
Amb.
Amb. F1
Amb. F1 - A0
Evap.
ON
Evap. Fan
OFF
Fig. 7.o
F2: Fans OFF with compressor OFF (according to the value of F0)
Used to decide whether the fans must operate according to the rules set for parameter F0 (with the exception of the defrost cycle,
parameters F3, dd and Fd are displayed) or when the compressor is active.
• F2=0 => the fans are always ON (F0=0) or when requested by the fan controller (F0=1,2), even when the compressor is OFF;
• F2=1 => the fans are OFF when the compressor is OFF.
Note: if control with two compressor steps is selected (with or without rotation, H1 or H5= 12 or 13) and parameter F2 =1, the
fans are off when both the compressors are off.
Default: F2=1 => fans OFF with compressor OFF.
F3: Fans in defrost
This is used to decide whether the fans should operate or not during the defrosts.
F3=0 => the fans operate during defrosts;
F3=1 => the fans do not operate during defrosts.
Remember that during the dripping time and post-dripping time, if specified, the fans are always OFF. Default: F3=1 =>
evaporator fans OFF during the defrost.
Fd: Fans OFF for post-dripping
The fans, after defrosting, can be stopped for a further period beyond dd (in minutes), defined by the value of Fd. This is useful
to allow the evaporator to return to its operating temperature after defrosting, thus avoiding forcing “hot” air into the refrigerated
environment. In the event of management by fan controller, the time Fd does not need to be set, as the controller starts the fans
again when the evaporator reaches its operating temperature. If the “fan controller” is active (F0=0), when assigning to Fd a value
other than zero, the fans remain OFF for a time equal to the value of Fd, irrespective of the evaporator temperature. Default: Fd=1
=> 1 minute stop for post-dripping.
F4: Condenser fan stop temperature
This is used to select the temperature at which the condenser fans should be switched OFF. If setting the auxiliary relay as the
condenser fan output (see parameter H1), this will enable adjustments according to the diagram in Figure 7.p:
When the compressor is first started, the fans are switched ON at F4 + 0.2 degrees to compensate for rapid temperature increases
that are not easy for the probe to follow.
After this, control is performed normally, i.e.:
• on: F4 + F5
• off : F4.
50
ir33 +030220441 - rel. 2.5 - 16.06.10
In the event of condenser probe errors, the condenser fan output, if selected, is activated.
Important: If no condenser probe is selected, the condenser fan output, if selected, is disabled.
Default: F4=40.0 degrees.
F5: Condenser fan start differential
This is the differential used to control the condenser fans.
Default: F5=5.0.
“F4” + “F5” temp. condensatore
“F4” 0.2
prima accensione
Fig. 7.p
7.7 General configuration parameters
Code
H0
H1
H2
H3
H4
H5
H6
H7
H8
H9
HPr
Hdn
Hrl
HrA
HSA
In
Hdh
Parameter
Serial address
Function of AUX output
Disable keypad/IR
Remote control enabling code
Disable buzzer
Function of relay 5
Lock keypad
Select keypad
Select activation of output with time band
Enable set point variation with time band
Print profile
Number of default parameter sets available
Enable the remote signalling of the status of the master light relay
Enable the remote signalling of the status of the master auxiliary
relay
Enable alarms from other devices in local network
Establishes if the unit is normal, master or slave
Anti-sweat heater offset
Models
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
UOM
flag
flag
flag
flag
flag
flag
flag
flag
MSYF
MSYF
MSYF
flag
°C/°F
Tipo Min
C
0
C
0
C
1
C
0
C
0
C
0
C
0
C
0
C
0
C
0
C
0
C
0
C
0
C
0
C
C
C
0
0
-50
Max
207
13
6
255
1
10
255
1
1
1
15
6
1
1
Def.
1
1
1
0
0
3
0
0
0
0
0
0
0
0
1
6
200
0
0
0.0
Tab. 7.m
Note:
- par. H5 refers to the instruments with 5 relays (ir33DIN, powercompact and MasterCella);
- parameters H7, HPr, Hdn, HrL, HrA, HsA and In are masked and consequently only visible using the programming kit (IROPZPRG00).
H0: Serial address
This is used to assign to the instrument an address it responds to when connected to a supervisory or telemaintenance system.
Default: H0=1.
H1: Operating mode: logic of output AUX1
Establishes whether the fourth relay is used as an auxiliary output.
The following functions can be associated:
H1=0 - alarm output normally energised. The relay is de-energised when an alarm occurs. The AUX output in “alarm” mode can be
set to operate either with the relay energised or de-energised. The latter mode ensures maximum safety, because the alarm is also
activated in the event of power failures or disconnection of the cables.
H1=1 - alarm output normally de-energised: the relay is energised when an alarm occurs.
H1=2 - auxiliary output: the actuator connected can be switched ON/OFF using the AUX button. Switching the actuator ON/OFF
is signalled by the icon on the display.
H1=3 - light output: the light on the unit can be switched on/off when the door is opened, pressing the LIGHT button, enabling the
digital input switch door or the curtain switch digital input (see parameter A4, A, A6) if the door switch is enabled (see parameter
A4). In this case, the light is switched off when the door is closed, unless previously switched off from the keypad. Switching the
light on/off is signalled by the icon on the display.
H1=4 - auxiliary evaporator defrost output: a heater or reversing valve can be controlled to perform an electric heater defrost or hot
gas defrost on the auxiliary evaporator.
H1=5 - pump down valve output: the activation and deactivation of the pump down valve can be controlled.
H1=6 - condenser fan output: if the high condenser temperature alarm is activated, the output can be used to control the condenser fans (see parameter Ac and F4).
H1=7 - delayed compressor output: the output is activated a few seconds after the compressor starts (the delay is established by
parameter c11, deactivation of the compressor output corresponds to immediate deactivation of the delayed compressor. If this
operating mode is set, it is also active during the compressor pump down and autostart phases, if selected with the appropriate
parameters.
H1=8 - auxiliary output with deactivation when OFF: in the off status, the auxiliary output cannot be activated. When starting
again, the auxiliary output returns to the previous status.
H1=9 - light output with deactivation when OFF: in the off status, the light cannot be activated. When starting again, the light
returns to the previous status.
H1=10 - no function associated with the output. In this case, the logical output AUX1 is not used for any function. If logical outputs
AUX1 and AUX2 are associated with the same relay, this setting means the relay in question will only be associated with AUX2.
Vice-versa, using this setting for AUX2, the relay will only be associated with AUX1. This possibility is useful when there is just one
auxiliary relay, and it needs to be used alternatively as a light relay, associated with the light button and icon, or as an AUX relay,
associated with the AUX button and icon.
H1=11- reverse output in control with dead band: used to activate control with dead band (‘St’‘rd’‘rn’‘rr’), using the auxiliary output
aux1 for the reverse function.
H1=12 - second compressor step output.
H1=13 - second compressor step output with rotation .
Important: mode ‘H1’=0 is also useful for signalling power failures.
Default: H1=1 => relay energised with alarm active. Available on all models with aux output.
ir33 +030220441 - rel. 2.5 - 16.06.10
51
ENGLISH
ON ventole
ENGLISH
H2: Disable keypad and/or remote control
Parameter ‘H2’ can be used to inhibit some functions relating to the use of the keypad, for example, the modification of the parameters and the set point if the unit is accessible to the public.
The following options are available:
Parameter “H2”
0
1
2
3
4
5
6
HACCP
PRG/MUTE (mute)
UP/aux
DOWN/DEF (defrost)
set (modification of type F parameters)
Modification of the set point
Modification from the remote control
ON/OFF
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Tab. 7.n
When the set point modification and parameter modification functions are inhibited, neither the set point nor the type F parameters can be changed, while their values can still be displayed. The type C parameters, however, being password protected, can also
be modified from the keypad, following the procedure described previously. With the remote control disabled, only the values of
the parameters can be displayed, but they cannot be modified; in addition, the mute, defrost, continuous cycle, aux (auxiliary 1),
light (auxiliary 2) and on/off functions are disabled. Warnings: If H2=2 or H2=3 is set on the remote control, this is immediately
disabled. To re-enable the remote control, set H2=0 or H2=1 on the keypad.
Default: H2=1=> all enabled
H3: Enabling code for programming from the remote control
Parameter H3 assigns an access code to the remote control. As already described, this allows the remote control to be used when
there is more than one controller present on the same panel, without the risk of interference. For further details, see the paragraph
on the use of the remote control.
Default: H3=00 => programming from the remote control without code.
ir33, ir33power and ir33DIN:
3
2
1
0
8
4
2
1
H4: Disable buzzer
This parameter can have two values:
H4=0 buzzer enabled;
H4=1 buzzer disabled
Default: H4=0=> buzzer enabled. Available on all models.
Tastiera standard
Tasto Set
Tasto down/def
Tasto up/aux
H5: AUX2 operating mode
See parameter H1, however referring to the auxiliary logical output (or relay 5).
Tasto prg/mute
Fig. 7.q
H6: Lock keypad
Using the corresponding bits, the functions relating to the individual buttons on the keypad can be enabled/disabled, according to
the following relationships:
Total (value of parameter H6): to calculate the value to be assigned to parameter H6, simply sum the values assigned to the
functions that should be disabled.
For ir33, ir33power and ir33DIN see Table 7.q, for powercompact, powercompact small and mastercella see Table 7.q.
Value
Function
set button
down/def button
up/aux button
prg/mute button
Disabled
1
2
4
8
+
Important: the functions disabled using parameter H6 are added to those disabled using parameter H2.
Example:
disable the “SET button”, “AUX button”:
ir33, ir33power and ir33DIN: 1+4 = 5 = value or parameter H6;
powercompact, powercompact small and mastercella: 1+32 = 33 = value of parameter H6.
Tab. 7.p
powercompact, powercompact small and MasterCella keypad
7
6
5
4
3
2
1
0
128
64
32
16
8
4
2
1
Tastiera standard
Bit
0
Value
1
Button
Functions that can be enabled/disabled
Report printing procedure
1
2
Defrost
2
4
Continuous cycle
3
8
Mute
4
16
Enter HACCP
5
32
Enable/disable auxiliary output 1
6
64
On/Off
7
128
Enable/disable auxiliary output 2
Tasto Set
Tasto down/def
Tasto up/cc
Tasto prg/mute
Tasto haccp
Tasto aux
Tasto on/off
Tasto luce
Fig. 7.r
Bit Mask
Button
0
1
Set
1
2
def
2
4
3
8
aux
Tab. 7.o
Functions that can be enabled/disabled
Default: H6=0 => all buttons disabled.
Enter HACCP;Report printing procedure
H7 (masked parameter)
‘H7’=0 => Use the standard keypad.
‘H7’=1 => Use the MODIFIED keypad.
Defrost;Continuous cycle;Enter HACCP
This parameter selects the type of keypad used on the controller. Two types of keypads are available: STANDARD and MODIFIED.
The choice of the type of keypad determines the visibility to the user of the HACCP and %rH (relative humidity percentage)
functions.
The functions of the standard keypad are those described thus far.
and enables the %rH function
The MODIFIED keypad shifts the HACCP functions to the combination of buttons SET and
(for further information, contact CAREL).
As for the standard keypad, the functions of the individual buttons can be disabled using parameter ‘H6’.
Default: ‘H7’=0 => Use the standard keypad.
Enable/disable auxiliary output 1; Continuous cycle
Mute
Tab. 7.q
52
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
H8: Select light or AUX output to activate with time band.
This parameter can be used to select the output that is activated or deactivate according to the time band (see parameters tON
and tOF).
H8=0=> Time band linked to output configured as the light.
H8=1=> Time band linked to output configured as AUX.
Note: the output being controlled (light or AUX) must be available and selected with parameter H1.
Default: H8=0 => Time band linked to the light.
H9: Enable set point variation with time band.
This parameter can be used to enable the variation of the set point according to the time band (see parameters ton and toF). The
controller modifies the set point by adding the value of parameter r4 (to the time toF), the new value is used for all the functions
relating to the set point (e.g. relative high and low temperature alarms, control with dead band, control with two compressor
steps etc.).
H9=0 => Set point variation with time band disabled.
H9=1 => Set point variation with time band enabled.
Note: When r4=3.0 (preset value) the set point is increased by 3 degrees from the value used before toF, at ton the value of the
set point will be the value set for parameter St.
As the time band set by ton and toF is related to the output auxiliary selected using parameter H8, the corresponding output will
switch on at ton, and will switch off at toF.
Therefore, when H9=1, the following will be true:
- ton : normal set point and selected output on.
- toF : set point + r4 and selected output off.
Default: H9=0 => Function disabled.
HPr: Print profile (masked parameter)
This is used to select the required profile for printing the report on an external printer.
The interface for printing the data from the instrument requires a specific accessory.
Default: HPr=0 => Report printing disabled.
Hdn: Number of sets of default parameters available (masked parameter)
The controller can feature one or more sets of default parameters. Set 0 is standard and corresponds to the values listed in the Def.
columns of the lists of parameters (for the visible parameters), and cannot be customised. The other sets can be customised by the
user with the programming key kit PSOPZPGR00.
Set
0
1,2,3,4,5,6
Customisable
NO
YES
Note
The levels of visibility are not modified. Sets the values of the visible parameters only.
The levels of visibility and the values of all the operating and unit parameters are set.
Tab. 7.r
Notes:
1. The set of customisable default parameters can only be used on the controller if there is suitable hardware (expanded
EEPROM memory).
2. If when loading a set of customised default parameters there is an EF EEPROM error (memory error on the controller), the
previous parameters can be restored by switching the instrument off and on again.
3. If there is an EF EEPROM error, to maintain the loaded parameters, enter parameter configuration mode, check the values
then save them to the EEPROM using the special procedure. At then end of the operation, the EEPROM error signal will be
cancelled.
4. If there is a recurring EE or EF EEPROM error when loading a set of customised default parameters, the EEPROM on the
instrument should be corrected using the programming hardware key.
5. After loading a set of customised default parameter, the controller automatically updates the memory, saving both the levels
of visibility and the values of the parameters.
6. The parameter Hdn must have the same value in all the sets of customised default parameters.
7. For greater protection, parameter Hdn must be set to not visible.
Default: Hdn=0 => standard default parameters only.
Hdh: Anti-sweat heater offset
This represents the offset from the set point for the anti-sweat heater function. If Hdh = 0, the anti-sweat heater function is
disabled. The anti-sweat heater function is used to maintain the aux 1 or 2 output, configured as the light or aux (H1 or H5= 2,
3, 8, 9) deactivated while the control temperature (virtual probe) is less than ‘St’ + ‘Hdh’ when the instrument is first powered up,
the ‘HI’‘IA’‘dA ‘CHt’‘EE’‘EF’‘rE’ alarms are reset.
During the aforementioned alarms, the aux 1 or 2 output, configured as above, is deactivated.
The function is active, if the light or aux functions are set to be deactivated when off ,‘H1’ or ‘H5’=8, 9, even when switching the
controller on.
Default:
Hdh =0.0 => function disabled (C°)
Hdh =32 => function disabled (°F).
HrL: enable the synchronizer to remote the status of the master light relay to the slave controller
(masked parameter).
The parameter HrL enables the synchronizer to remote the light relay status light on the master to the slave controller. Consequently,
the light relay on the slave will repeat the status of the light relay on the master. Default: HrL=0 =>remote status disabled.
HrA: HrA: enable the synchronizer to remote the status of the master auxiliary relay to the controller (masked parameter)
As above, but relating to the auxiliary relay on the master. Default: HrA=0 => remote status disabled.
HSA: enable the synchronizer to remote the alarms from the slave devices in the local network to the master controller
(masked parameter).
The parameter HSA enables the synchronizer to remote the alarms from other devices in the local network to the controller. If HSA
is equal to 1, the alarms on the other controllers in the network will be shown on the local display, with the symbol Nx, where
x=1 to 6 is the slave device in question). Default: HSA=0 =>display disabled.
ir33 +030220441 - rel. 2.5 - 16.06.10
53
ENGLISH
In: select normal, master or slave unit (masked parameter).
The parameter In establishes whether the unit is normal, master or slave. The maximum number of slaves in a sub-network is 5.
• Normal: stand-alone unit
• Master: Master unit. Allows the synchronisation of the defrosts, remote signalling of the light and aux relays and the alarms,
and the downloading of the parameters.
• Slave: Slave unit. Unit part of a local network serving the master.
The following table shows the values of the parameter:
In: 0 = No Master-Slave (normal)
1 = Master
2 = Slave 1
3 = Slave 2
4 = Slave 3
5 = Slave 4
6 = Slave 5
Note: the synchronisation of the multiplexed defrost is activated only on Master and Slave controllers.
Default: In=0 => normal.
7.8 HACCP alarm management parameters
No
108
109
110
111
112
113
114
115
116
Code
HAn
HA
y__
M__
d__
h__
n__
t__
HA1
HA2
HFn
HF
y__
M__
d__
h__
n__
t__
HF1
HF2
Htd
Parameter
Number of HA events recorded
Date/time of last HA event
Year
Month
Day
Hours
Minutes
Duration
Date/time of penultimate HA event
Date/time of third from last HA event
Number of HF events recorded
Date/time of last HF event
Year
Month
Day
Hours
Minutes
Duration
Date/time of penultimate HF event
Date/time of third-to-last HF event
HACCP alarm delay
Models
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
UOM
Years
Months
Days
Hours
Min.
Hours
Years
Months
Days
Hours
Min.
Hours
min
Type
C
C
C
C
C
C
C
C
C
Min
0
0
1
1
0
0
0
0
0
1
1
0
0
0
0
Max Def.
15
0
99
0
12
0
7
0
23
0
59
0
99
0
15
0
99
0
12
0
7
0
23
0
59
0
99
0
0
250 0
Tab. 7.s
HAn: Number of HA alarm events recorded
This parameter indicates the number of HA alarms activated. A maximum of 15 events can be counted. For each alarm event after
the 15th, the counter stays at 15.
Default: HA=0
HA: Date/time of the last HA event
HA1: Date/time of the penultimate HA event
HA2: Date/time of the third from last HA event
These parameters access a submenu where, by pressing the AUX and DEF buttons, the year, month, day, hour, minutes and
duration of the last HA alarm activated can be scrolled. Default: 0
E.g: y03 -> M07 -> d22 -> h23 -> m57 -> t99
indicates that the last alarm HA was activated on 22 July 2003 at 23:57 and lasted 99 hours.
HFn: Number of HF alarm events recorded
As for HAn, this parameter indicates the number of HF alarms activated. A maximum of 15 events can be counted. For each alarm
event after the 15th, the counter stays at 15.
Default: HFn=0
HF: Date/time of the last HF event
HF1: Date/time of the penultimate HF event
HF2: Date/time of the third from last HF event
These parameters access a submenu where the year, month, day, hour, minutes and duration of the last HF alarm activated can be
scrolled.
E.g: ‘y03’ -> ‘M08’ -> ‘d29’ -> ‘h19’ -> ‘m45’ -> ‘t98’
indicates that the last alarm HA was activated on 29 July 2003 at 19:45 and lasted 98 hours.
Default HF/1/2= 0
Htd: HACCP alarm delay
Delay time in minutes that, added to the time Ad, determines the time interval after which the HA error is activated. If set to 0,
HACCP monitoring (both HA and HF) is disabled.
Any alarms already saved will still be stored, even when Htd=0.
Default: Htd=0=> HACCP monitoring disabled.
54
ir33 +030220441 - rel. 2.5 - 16.06.10
7.9 RTC and timed defrost management parameters
118
119
120
121
122
123
124
125
126
127
Code
td1
d__
h__
n__
td2
td3
td4
td5
td6
td7
td8
ton
d__
h__
n__
toF
d__
h__
n__
tc
y__
M__
d__
u__
h__
n__
Parameter
Defrost time band 1
Day
Hours
Minutes
Defrost time band 2
Defrost time band 3
Defrost time band 4
Defrost time band 5
Defrost time band 6
Defrost time band 7
Defrost time band 8
Light/aux on time band
Day
Hours
Minutes
Light/aux off time band
Day
Hours
Minutes
RTC date/time setting
Year
Month
Day of the month
Day of the week
Hours
Minutes
Models
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
MSYF
UOM
Days
Hours
Min.
Days
Hours
Min.
Days
Hours
Min.
Years
Month
Days
Days
Hours
Min.
Type
C
C
C
C
C
C
C
C
C
C
C
0
1
1
6
0
0
Min
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
Max
11
23
59
11
23
59
11
23
59
99
12
31
7
23
59
Def.
0
0
0
0
0
0
0
0
0
00
1
1
6
0
0
Tab. 7.t
ENGLISH
No.
117
td1...td8: Defrost time band 1 to 8
These parameters can be used to set up to 8 defrost events linked to the system clock. To display and set or modify one of the events,
access one of the parameters between td1 and td8, and then press SET. This enters a submenu in which the or button can be
used to display and set the day, hour and minutes of the defrost event.
In the following example: day 8 (from Monday to Friday), hours 23, minutes 57. To modify the day, hour or minutes of the event,
access the desired parameter by pressing the up or down button and then press SET to modify the value: the letter identifying the
parameter disappears, and, at this point, the value can be increased or decreased using or.
The parameter d__ sets the day of the event, as follows:
‘d__’=0 => event disabled
‘d__’=1 to 7 => Monday to Sunday
‘d__’=8 => from Monday to Friday
‘d__’=9 => from Monday to Saturday
‘d__’=10 => Saturday and Sunday
‘d__’=11 => every day
Setting ‘h__’ (0 to 23), ‘m__’ (0 to 59) sets the hour and minutes of the event.
Default: ‘d__’=0, ‘h__’=0, ‘m__’=0 => Event disabled
Pressing SET temporarily saves the changes to the modified parameter and returns to the submenu for setting the event. The display
or modification of the parameters corresponding to the event can be continued, or return to the list of RTC parameters by pressing
PRG.
ton and tof - light/aux on/off time bands: These parameters are used to set the on/off of the light or the aux, based on the
system clock (to select aux or light, see parameter H8); in addition, the set point can be modified based on the system clock (for
the activation and the description of the function, see parameter H9). To display, set or modify one of the two events, access one of
the two parameters, ton or toF, and then press SET. Use the ton parameter to set on time, and the toF parameter to set the off time.
Press SET to enter a submenu where the or button can be used to display and set the day, hour and minutes of the defrost
ON or OFF event.
For example, to set ON from Monday to Saturday at 8.30, and OFF from Monday to Saturday at 19.30:
The parameter d__ sets the day of the event, as follows:
‘d__’=0 => event disabled
‘d__’=1 to 7 => Monday to Sunday
‘d__’=8 => from Monday to Friday
ir33 +030220441 - rel. 2.5 - 16.06.10
55
ENGLISH
7.10 Summary table of operating parameters
56
Code
Pw
/2
/3
/4
/5
/6
/tI
/tE
/P
/A2
Parameter
Password
Measurement stability
Probe display response
Virtual probe
Select °C or °F
Decimal point
Display on internal terminal
Display on external terminal
Select type of probe
Configuration of probe 2 (S2)
/A3
/A4
/A5
/c1
/c2
/c3
/c4
/c5
Configuration of probe 3 (S3,DI1)
Configuration of probe 4 (S4,DI2)
Configuration of probe 5 (S5,DI3)
Calibration of probe 1
Calibration of probe 2
Calibration of probe 3
Calibration of probe 4
Calibration of probe 5
Model
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
YF
MS
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
Model
UOM
flag
flag
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
Type
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Min
0
1
0
0
0
0
1
0
0
0
0
0
0
0
-20
-20
-20
-20
-20
Max
200
15
15
100
1
1
7
6
2
3
3
3
3
3
20
20
20
20
20
Def.
22
4
0
0
0
0
1
0
0
2
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Code
Parameter
St
rd
rn
rr
r1
r2
r3
r4
r5
rt
rH
rL
Temperature set point
Control delta
Dead band
Reverse differential for control with dead band
Minimum set point allowed
Maximum set point allowed
Operating mode
Automatic night-time set point variation
Enable temperature monitoring
Temperature monitoring interval
Maximum temperature read
Minimum temperature read
MSYF
-SYF
-SYF
-SYF
MSYF
MSYF
-SYF
MSYF
MSYF
MSYF
MSYF
MSYF
UOM
Type
Min
Max
Def.
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
flag
°C/°F
flag
hours
°C/°F
°C/°F
F
F
C
C
C
C
C
C
C
F
F
F
r1
0.1
0.0
0.1
-50
r1
0
-20
0
0
-
r2
20
60
20
r2
200
2
20
1
999
-
0.0
2.0
4.0
2.0
-50
60
0
3.0
0
-
Code
c0
Model
-SYF
UOM
min
Type
C
Min
0
Max
15
Def.
0
c1
c2
c3
c4
cc
c6
c7
c8
c9
c10
c11
Parameter
Compressor, fan and AUX start delay on power up
in dead zone
Minimum time between successive starts
Minimum compressor OFF time
Minimum compressor ON time
Duty setting
Continuous cycle duration
Alarm bypass after continuous cycle
Maximum pump down time
Comp. start delay after open PD valve
Enable autostart function in PD
Select pump down by time or pressure
Second compressor delay
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
min
min
min
min
hours
h/min
s
s
flag
flag
s
C
C
C
C
C
C
C
C
C
C
C
0
0
0
0
0
0
0
0
0
0
0
15
15
15
100
15
250
900
60
1
1
250
0
0
0
0
0
2
0
5
0
0
4
Code
d0
dI
dt1
dt2
dt3
dP1
dP2
d3
d4
d5
d6
dd
d8
d8d
d9
d/1
d/2
dC
d10
d11
d12
dn
dH
Parameter
Type of defrost
Interval between defrosts
End defrost temperature, evaporator
End defrost temperature, aux. evap.
End defrost temperature, evap. probe 3
Maximum defrost duration, evaporator
Maximum defrost duration, aux evap.
Defrost start delay
Enable defrost on start-up
Defrost delay on start-up
Display on hold during defrost
Dripping time after defrost
Alarm bypass after defrost
Alarm bypass after door open
Defrost priority over compressor protectors
Display of defrost probe 1
Display of defrost probe 2
Time base for defrost
Compressor running time
Running time temperature threshold
Advanced defrost
Nominal defrost duration
Proportional factor, variation in dI
Model
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
MSYF
MSYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
UOM
flag
h/min
°C/°F
°C/°F
°C/°F
min
min
Min
flag
min
min
h/min
min
flag
°C/°F
°C/°F
flag
hours
°C/°F
-
Type
C
F
F
F
F
F
F
C
C
C
C
F
F
C
C
F
F
C
C
C
C
C
C
Min
0
0
-50
-50
-50
1
1
0
0
0
0
0
0
0
0
0
0
-20
0
1
0
Max
4
250
200
200
200
250
250
250
1
250
2
15
250
250
1
1
250
20
3
100
100
Def.
0
8
4.0
4.0
4.0
30
30
0
0
0
1
2
1
0
0
0
0
1.0
0
65
50
Code
A0
A1
AL
AH
Ad
A4
Parameter
Alarm and fan differential
Type of threshold AL and AH
Low temperature alarm threshold
High temperature alarm threshold
Low and high temperature signal delay
Digital input 1 configuration (DI1)
Model
MSYF
MSYF
MSYF
MSYF
MSYF
-SYF
UOM
°C/°F
flag
°C/°F
°C/°F
min
-
Type
C
C
F
F
F
C
Min
0.1
0
-50
-50
0
0
Max
20
1
200
200
250
14
Def.
2.0
0
0.0
0.0
120
0
ir33 +030220441 - rel. 2.5 - 16.06.10
C
C
C
C
C
C
C
C
C
C
C
C
C
0
0
0
0
0
0
0
0.0
0.1
0
0
-50
0
14
14
100
250
1
14
1
200
20
250
250
200
15
3
0
0
0
0
0
0
70.0
10.0
0
0
-5.0
1
Parameter
Fan management
Fan start temperature
Fan OFF with compressor OFF
Fans in defrost
Fan OFF after dripping
Condenser fan stop temperature
Condenser fan start differential
Model
---F
---F
---F
---F
---F
MSYF
MSYF
UOM
flag
°C/°F
flag
flag
min
°C/°F
°C/°F
Type
C
F
C
C
F
C
C
Min
0
-50
0
0
0
-50
0.1
Max
2
200
1
1
15
200
20
Def.
0
5.0
1
1
1
40
5.0
Parameter
Serial address
Function of AUX output
Disable keypad/IR
Remote control enabling code
Disable buzzer
Function of AUX output 2
Lock keypad
Select keypad
Select activation of output with time band
Enable set point variation with time band
Print profile
Anti-sweat heater offset
Number of default parameter sets available
Enable the remote signalling of the status of the
master light relay
Enable the remote signalling of the status of the
master auxiliary relay
Enable alarms from other devices in the local network
Establishes whether the unit is normal, master or
slave
Model
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
UOM
flag
flag
flag
flag
flag
flag
°C/°F
flag
Type
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Min
0
0
1
0
0
0
0
0
0
0
0
-50
0
0
Max
207
13
6
255
1
13
255
1
1
1
15
200
6
1
Def.
1
1
1
0
0
3
0
0
0
0
0
0.0
0
0
MSYF
flag
C
0
1
0
MSYF
MSYF
flag
-
C
C
0
0
1
6
0
0
Code
HAn
HA
y__
M__
d__
h__
n__
t__
HA1
HA2
HFn
HF
y__
M__
d__
h__
n__
t__
HF1
HF2
Htd
Parameter
Number of HA events recorded
Date/time of last HA event
Year
Month
Day
Hours
Minutes
Duration
Date/time of penultimate HA event
Date/time of third from last HA event
Number of HF events recorded
Date/time of last HF event
Year
Month
Day
Hours
Minutes
Duration
Date/time of penultimate HF event
Date/time of third-to-last HF event
HACCP alarm delay
MSYF
MSYF
MSYF
UOM
Years
Months
Days
Hours
Min.
Hours
Years
Months
Days
Hours
Min.
Hours
min
Type
C
C
Min
0
0
1
1
0
0
0
0
0
1
1
0
0
0
0
Max
15
99
12
7
23
59
99
15
99
12
7
23
59
99
250
Def.
0
Code
td1
d__
h__
n__
td2
td3
td4
td5
td6
td7
td8
ton
d__
h__
n__
toF
Parameter
Defrost time band 1
Day
Hours
Minutes
Defrost time band 2
Defrost time band 3
Defrost time band 4
Defrost time band 5
Defrost time band 6
Defrost time band 7
Defrost time band 8
Light/aux on time band
Day
Hours
Minutes
Light/aux off time band
MSYF
-SYF
UOM
Days
Hours
Min.
Days
Hours
Min.
-
Type
C
Min
0
0
0
0
0
0
-
Max
11
23
59
11
23
59
-
Def.
0
0
0
0
0
0
-
Digital input 2 configuration (DI2)
Stop compressor from external alarm
Enable alarms Ed1 and Ed2
Digital input 3 configuration (DI3)
Light management mode with door switch
High condenser temperature alarm
High condenser temperature alarm differential
High condenser temperature alarm delay
High condenser temperature alarm delay
Light sensor OFF time
Antifreeze alarm threshold
Antifreeze alarm delay
Code
F0
F1
F2
F3
Fd
F4
F5
Code
H0
H1
H2
H3
H4
H5
H6
H7
H8
H9
HPr
Hdh
Hdn
Hrl
HrA
HSA
In
ir33 +030220441 - rel. 2.5 - 16.06.10
M--MSYF
-SYF
-SYF
-SYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
MSYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
-SYF
****
-SYF
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
*
C
ENGLISH
MSYF
-SYF
-SYF
-SYF
-SYF
MSYF
MSYF
min
min
flag
flag
°C/°F
°C/°F
min
s
°C/°F
min
A5
A6
A7
A8
A9
Ado
Ac
AE
Acd
AF
ALF
AdF
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
57
ENGLISH
d__
h__
n__
tc
y__
M__
d__
u__
h__
n__
Day
Hours
Minutes
RTC date/time setting
Year
Month
Day of the month
Day of the week
Hours
Minutes
****
****
****
MSYF
****
****
****
****
****
****
Days
Hours
Min.
Years
Months
Days
Days
Hours
Min.
*
*
*
C
*
*
*
*
*
*
0
0
0
0
1
1
1
0
0
11
23
59
99
12
31
7
23
59
0
0
0
0
1
1
6
0
0
Note: the visibility of the parameters may vary according to the models:
- mastercella model A = same default configuration as ir33, ir33power, ir33DIN, powercompact and powercompact
small model S;
- mastercella model D, and model C and M of the other instruments, same configuration as model F.
58
ir33 +030220441 - rel. 2.5 - 16.06.10
8.1 Summary table of alarms and signals: display, buzzer and relay
The following table describes the alarms and signals on the controller, with their description, the status of the buzzer, the alarm
relay and the reset mode.
Code
Icon on the display
rE
Buzzer
Reset
Description
on
automatic
virtual control probe fault
off
off
automatic
room probe S1 fault
off
off
automatic
defrost probe S2 fault
off
off
automatic
probe S3 fault
off
off
automatic
probe S4 fault
off
off
automatic
probe S5 fault
flashing
off
on
off
on
automatic
automatic
probe not enabled
low temperature alarm
flashing
on
on
automatic
high temperature alarm
on
manual
antifreeze alarm
flashing
E0
flashing
E1
flashing
E2
flashing
E3
flashing
E4
‘___’
LO
Alarm relay
on
flashing
No
HI
flashing
on
IA
flashing
on
on
automatic
immediate alarm from external contact
dA
flashing
on
on
automatic
delayed alarm from external contact
on
off
off
automatic
defrost running
off
off
on
off
off
on
automatic/manual
automatic/manual
automatic/manual
defrost on evaporator 1 ended by timeout
defrost on evaporator 2 ended by timeout
maximum pump down time alarm
on
on
automatic/manual
low pressure alarm
on
on
automatic/manual
autostart in pump down
off
on
off
on
automatic/manual
manual
high condenser temperature pre-alarm
high condenser temperature alarm
flashing
on
on
automatic
door open too long alarm
off
automatic/manual
real time clock fault
AFr
dEF
Ed1
Ed2
Pd
No
No
flashing
LP
flashing
AtS
cht
CHT
flashing
No
flashing
dor
Etc
flashing
off
EE
flashing
off
off
automatic
E2prom error, unit parameters
EF
flashing
off
off
automatic
E2prom error, operating parameters
flashing
off
off
manual
HACCP alarm, HA
flashing
off
off
manual
HACCP alarm, HF
off
off
off
off
off
off
off
off
off
off
automatic
automatic
automatic
automatic
automatic
flashing
on
on
automatic
instrument enabled for programming from the remote control
automatic address assignment procedure in progress
printing report
activation of low relative humidity procedure
activation of high relative humidity procedure
start continuous cycle request
end continuous cycle request
start defrost call
end defrost call
switch ON
switch OFF
reset alarms with manual reset
reset HACCP alarms
reset temperature monitoring
indicates an alarm on unit 1-6 in the network.
flashing
off
off
HA
HF
rCt
Add
Prt
LrH
HrH
ccb
ccE
dFb
dFE
On
off
rES
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
Signal
n1 - n6
dnL
d1 - d6
Signal
download in progress
download with errors on unit 1-6.
Tab. 8.a
The buzzer sounds if enabled by parameter H4.
The alarm relay is activated if auxiliary output 1 (H1) has been assigned the alarm relay function.
Note: the buzzer is not affected by the CAREL supervisory system.
ir33 +030220441 - rel. 2.5 - 16.06.10
59
ENGLISH
8. ALARMS AND SIGNALS
ENGLISH
8.2 Table of alarms and signals: functions enabled/disabled
The following table highlights the functions that are enabled and disabled in the various alarm situations.
Code
rE
E0
E1
E2
E3
E4
‘___’
LO
HI
AFr
IA
dA
dEF
Ed1
Ed2
Pd
LP
Ats
cht
CHt
dor
Etc
EE
EF
HA
HF
n1-n6
dnL
d1 - d6
PD valve
Duty setting (c4)
Duty setting (c4)
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
Duty Setting (A6)
Duty setting (A6) if A7<>0
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
unchanged
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
Compressor
Duty setting (c4)
Duty setting (c4)
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
Duty setting (A6)
Duty setting (A6) if A7<>0
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
off
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
Defrost
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
not performed
not performed
unchanged
unchanged
unchanged
unchanged
unchanged
Evap. fans
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
Cond. fans
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
Continuous cycle
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
not performed
not performed
unchanged
unchanged
unchanged
unchanged
unchanged
Tab. 8.b
Code
rE
E0
E1
E2
E3
E4
‘___’
LO
HI
AFr
IA
dA
dEF
Ed1
Ed2
Pd
LP
Ats
cht
CHt
dor
EE
EF
HA
HF
n1 - n6
dnL
d1 - d6
AUX dead zone
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
off if A7<>0
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
AUX light anti-sweat
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
unchanged
off
off if A7<>0
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
AUX auxiliary anti sweat
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
unchanged
off
off if A7<>0
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
AUX second step
Duty setting (C4)
Duty setting (C4)
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
unchanged
off
Duty setting (A6)
Duty setting (A6) if A7<>0
unchanged
unchanged
unchanged
unchanged
off
unchanged
unchanged
off
unchanged
unchanged
off
off
unchanged
unchanged
unchanged
unchanged
unchanged
tab. 8.c
CAREL reserves the right to modify or change its products without prior notice.
60
ir33 +030220441 - rel. 2.5 - 16.06.10
ENGLISH
NOTE:
ir33 +030220441 - rel. 2.5 - 16.06.10
61
ENGLISH
NOTE:
CAREL INDUSTRIES HQs
Via dell’Industria, 11 - 35020 Brugine - Padova (Italy)
Tel. (+39) 049.9716611 - Fax (+39) 049.9716600
e-mail: carel@carel.com - www.carel.com
+030220441 rel. 2.5 - 16.06.2010
Agenzia / Agency: