Emerson Dixell XR20T Wiring diagram

Full Touch
XR20T - XR30T - XR60T –XR70T
(V.1.5)

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 3/38
INDEX
1. IMPORTANT USER INFORMATION ......................................................................................................................................................................... 5
2. PRODUCT DISPOSAL (WEEE) .................................................................................................................................................................................. 6
3. GENERALITIES ........................................................................................................................................................................................................ 7
4. USER INTERFACE.................................................................................................................................................................................................... 7
4.1 SCREENS....................................................................................................................................................................................................... 7
4.2 ICONS ........................................................................................................................................................................................................... 8
4.3 GESTURES..................................................................................................................................................................................................... 9
4.4 HOME BROWSING...................................................................................................................................................................................... 10
4.5 STATUS VISUALIZATION.............................................................................................................................................................................. 10
4.6 STAND-BY MODE........................................................................................................................................................................................ 10
4.7 VIRTUAL KEYBOARD ................................................................................................................................................................................... 11
4.8 LOCK AND ULOCK DEVICE........................................................................................................................................................................... 11
4.9 SETPOINT MENU ........................................................................................................................................................................................ 11
4.10 HOTKEY –UPLOAD ..................................................................................................................................................................................... 11
4.11 HOTKEY –DOWNLOAD............................................................................................................................................................................... 12
4.12 INFO MENU ................................................................................................................................................................................................ 12
4.13 PARAMETER MENU .................................................................................................................................................................................... 13
4.14 PARAMETER MENU -ALL............................................................................................................................................................................ 13
4.15 PARAMETER MENU -GRP ........................................................................................................................................................................... 13
4.16 PASSWORD MENU...................................................................................................................................................................................... 14
4.17 X9............................................................................................................................................................................................................... 14
5. PARAMETER TABLE .............................................................................................................................................................................................. 15
5.1 PARAMETER DESCRIPTION ......................................................................................................................................................................... 15
5.1.1 Main regulation parameters - rEG......................................................................................................................................................... 15
5.1.2 Probe configuration parameters –Prb .................................................................................................................................................. 16
5.1.3 Visualization parameters –diS .............................................................................................................................................................. 17
5.1.4 Defrost configuration parameters –dEF................................................................................................................................................ 17
5.1.5 Evaporator and condenser fan configuration parameters - FAn............................................................................................................ 18
5.1.6 Auxiliary regulator parameters –AUS ................................................................................................................................................... 19
5.1.7 Alarm configuration parameters - ALr................................................................................................................................................... 20
5.1.8 Digital output configuration parameters –out...................................................................................................................................... 21
5.1.9 Digital input configuration parameters –inP ........................................................................................................................................ 22
5.1.10 Energy saving configuration parameters ES ..................................................................................................................................... 23
5.1.11 Counters, read only values –Cnt ...................................................................................................................................................... 23
5.1.12 Real Time Clock configuration parameters –rtC .............................................................................................................................. 25
5.1.13 Memory storage management –E2 ................................................................................................................................................. 25
5.1.14 Serial Communication port configuration parameters –CoM .......................................................................................................... 26
5.1.15 User Interface configuration parameters –Ui .................................................................................................................................. 26
5.1.16 Information, read only parameters –inF .......................................................................................................................................... 27
6. REGULATION........................................................................................................................................................................................................ 27
6.1 DOUBLE COMPRESSOR REGULATION......................................................................................................................................................... 27
7. ENERGY SAVING................................................................................................................................................................................................... 28
7.1 BASIC ENERGY SAVING ALGORITHM........................................................................................................................................................... 28
7.1.1 PARAMETERS INVOLVED ....................................................................................................................................................................... 28
8. PULL DOWN FUNCTION ....................................................................................................................................................................................... 28
9. DEFROST OPERATIONS......................................................................................................................................................................................... 28
9.1 TIMED OR TEMPERATURE CONTROLLED MODE ......................................................................................................................................... 29
9.2 AUTOMATIC DEFROST................................................................................................................................................................................ 29
9.3 OPTIMIZED DEFROST.................................................................................................................................................................................. 29
10. EVAPORATOR FAN........................................................................................................................................................................................... 29
10.1 EVAPORATOR FAN AND DIGITAL INPUT...................................................................................................................................................... 29
11. CONDENSER FAN............................................................................................................................................................................................. 29
12. DIGITAL OUTPUTS ........................................................................................................................................................................................... 30
12.1 COMPRESSOR OUTPUT (OAX =CP1)............................................................................................................................................................ 30
12.2 DEFROST OUTPUT (OAX =DEF) .................................................................................................................................................................... 30
12.3 EVAPORATOR FAN OUTPUT (OAX =FAN)..................................................................................................................................................... 30
12.4 ALARM OUTPUT (OAX =ALR)....................................................................................................................................................................... 30
12.5 LIGHT OUTPUT (OAX =LIG).......................................................................................................................................................................... 30
12.6 AUXILIARY OUTPUT (OAX =AUS)................................................................................................................................................................. 30
12.6.1 AUXILIARY REGULATOR .................................................................................................................................................................... 30
12.6.2 TIMED ACTIVATION .......................................................................................................................................................................... 30
12.6.3 GENERAL NOTES............................................................................................................................................................................... 30
12.7 DEAD BAND REGULATION (OAX =DB) .......................................................................................................................................................... 30
12.8 ON/OFF OUTPUT (OAX =ONF)...................................................................................................................................................................... 31
12.9 ENERGY SAVING OUTPUT (OAX =HES) ........................................................................................................................................................ 31
12.10 CONDENSER FAN OUTPUT (OAX =CND)....................................................................................................................................................... 31
12.11 SECOND COMPRESSOR OUTPUT (OAX =CP2).............................................................................................................................................. 31
12.12 SECOND DEFROST OUTPUT (OAX =DF2)...................................................................................................................................................... 31
12.13 HEATER OUTPUT (OAX =HET)...................................................................................................................................................................... 31
13. DIGITAL INPUTS............................................................................................................................................................................................... 31

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 4/38
13.1 DOOR SWITCH (IXF=DOR)............................................................................................................................................................................. 31
13.2 START DEFROST (IXF=DEF)........................................................................................................................................................................... 31
13.3 AUXILIARY OUTPUT (IXF=AUS) .................................................................................................................................................................... 31
13.4 ENERGY SAVING (IXF=ES) ............................................................................................................................................................................ 31
13.5 EXTERNAL WARNING ALARM (IXF=EAL) ...................................................................................................................................................... 31
13.6 EXTERNAL LOCK ALARM (IXF=BAL) .............................................................................................................................................................. 31
13.7 EXTERNAL PRESSURE ALARM (IXF=PAL) ...................................................................................................................................................... 32
13.8 EVAPORATOR FAN MODE (IXF=FAN) ........................................................................................................................................................... 32
13.9 REMOTE HOLIDAY MODE (IXF=HDF)............................................................................................................................................................ 32
13.10 REMOTE ONOFF (IXF=ONF).......................................................................................................................................................................... 32
13.11 LIGHT OUTPUT (IXF=LIG) ............................................................................................................................................................................. 32
13.12 PULL DOWN (IXF=CC).................................................................................................................................................................................. 32
13.13 MOTION SENSOR DETECTOR (IXF=EMT)...................................................................................................................................................... 32
13.14 CHANGE CONFIGURATION (IXF=MAP) ........................................................................................................................................................ 32
14. ALARM SIGNALLING........................................................................................................................................................................................ 32
14.1 ALARM RECOVERY...................................................................................................................................................................................... 32
15. SERIAL COMMUNICATION............................................................................................................................................................................... 32
16. INSTALLATION AND MOUNTING..................................................................................................................................................................... 33
17. WIRING DIAGRAMS......................................................................................................................................................................................... 33
17.1 XR70T......................................................................................................................................................................................................... 33
17.2 XR60T......................................................................................................................................................................................................... 33
17.3 XR30T......................................................................................................................................................................................................... 33
17.4 XR20T......................................................................................................................................................................................................... 34
18. TECHNICAL SPECIFICATIONS ........................................................................................................................................................................... 35
19. APPENDIX........................................................................................................................................................................................................ 37
19.1 TOOLS......................................................................................................................................................................................................... 37
19.1.1 XH-REP.............................................................................................................................................................................................. 37
19.1.2 X-MOD.............................................................................................................................................................................................. 37
19.1.3 WIZMATE.......................................................................................................................................................................................... 37
19.1.4 HOTKEY............................................................................................................................................................................................. 37
19.1.5 USB TO RS485 CONVERTER............................................................................................................................................................... 37
19.2 EXAMPLE OF MENU NAVIGATION AND PARAMETER MODIFICATION......................................................................................................... 38

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 5/38
1.IMPORTANT USER INFORMATION
•The symbol is intended to alert the user of a non-insultated voltage source within the
product area that is sufficiently high to constitute a risk of electric shock to persons.
•The symbol is intended to alert the user of important operating and maintenance
(servicing) instructions.
•Dixell Srl reserves the right to modify this user’s manual at any time without prior notice. The
documentation can be downloaded from the website www.fulltouch.info even prior to purchase.
•This manual is an integral part of the product and must always be kept near the device for easy
and quick reference. The product cannot be used as a safety device. Please read this manual
very carefully be sure you understand the information provided before using the device.
•Verify that the power supply voltage is correct before connecting the device. Do not expose it to
water or humidity: use the controller only within the operating limits, avoiding sudden temperature
changes and high atmospheric humidity in order to prevent condensation from forming.
Recommendations: disconnect all the electrical connections before performing any maintenance
task; insert the probewhere it cannot be reachedby the End User; the device must not be opened;
consider the maximum current that can be applied to each relay; make sure that the wires of the
probes, of the loads and the electical power supply cables are sufficiently separated from each
other, without crossing or intertwining. In case of applications in industrial environments, it may
be useful to use the main filters as well as the inductive loads.
•The customer shall bear full responsibility and risk for product configuration in order to achieve
the the final installation of the equipment/system. Upon the customer's request and following a
specific agreement, Dixell Srl may be present during the start-up of the final machine/application,
as a consultant, however, under no circumstances can the company be held responsible for the
correct operation of the final equipment/system.
•Since Dixell products are part of a high-level technology, a qualification and a
configuration/programming/commissioning stage is required to best use them. Otherwise, these
products may malfunction and Dixell cannot be held responsible. The product must not be used
in any way that differs from that stipulated in the documentation.
•The device must always be installed inside an electrical panel that can only be accessed by
authorised personnel. For safety purposes, the keyboard must be the only part that can be
reached.
•The electrical wiring connections must never be modify while the device is being used.

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 6/38
•It is good practice to bear in mind the following indications for all Dixell products:
oPrevent the electronic circuits from getting wet as contact made with water, humidity or any
other type of liquid can damage them. Comply with the temperature and humidity limits
specified in the manual in order to store the product correctly.
oThe device must not be installed in particularly hot environments as high temperatures can
damage the electronic circuits and/or plastic components forming part of the casing. Comply
with the temperature and humidity limits specified in the manual in order to store the product
correctly.
oUnder no circumstances is the device to be opened - the user does not need any internal
component. Please contact qualified service personnel for any assistance.
oPrevent the device from being dropped, knocked or shaken as either can cause irreparable
damage.
oDo not clean the device with corrosive chemical products, solvents or aggressive detergents.
oThe device must not be used in applications that differ from that specified in the following
document.
•Separate the power supply of the device from the rest of the electrical devices connected
inside the electrical panel. The secondary of the transformer must never be connected to
the earth.
•Dixell Srl reserves the right to change the components of its products, even without notice,
ensuring the same and unchanged functionality.
2.PRODUCT DISPOSAL (WEEE)
In compliance with the Directive 2002/96/EC of the European Parliament and of the Council of January 27th
2003 and to the relative national legislation, please note that:
•There lies the obligation not to dispose of electrical and electronic waste as municipal waste
but to separate the waste.
•Public or private collection points must be used to dispose of the goods in accordance with
local laws. Furthermore, at the end of the product's life, it is also possible to return this to the
retailer when a new purchase is made.
•This equipment may contain hazardous substances. Improper use or incorrect disposal can
have adverse effects on human health and the environment.
•The symbol shown on the product or the package indicates that the product has been placed
on the market after August 13th 2005 and must be disposed of as separated waste.
•Should the product be disposed of incorrectly, sanctions may be applied as stipulated in
applicable local regulations regarding waste disposal.
Please consider the environment before printing this manual.

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 7/38
3. GENERALITIES
The XR-T is a microprocessor-based controller suitable for applications on medium or low temperature
ventilated refrigeration units. It has 4 relay outputs to control compressor, fans, light and defrost or auxiliary
outputs. The device is also provided with up to 4 NTC, PTC or PT1000 probe inputs. There are up to 2
configurable digital inputs. By using the HOT-KEY it is possible to program the device quickly and easily. The
controller implements Full Touch technology.
4.USER INTERFACE
XR-T has a capacitive user interface with Full
Touch technology. The whole display area is
used to interact with the device. Specific gestures
are used to enable or disable functions, browse
through screens and operational modes and
modify the configuration of the device.
4.1 SCREENS
SCREEN
DESCRIPTION
Home: this screen shows temperature value,
measurement unit and active alarms only. This is the
first screen after power on or after exit from other status
Virtual Keyboard: this screen shows available
functions. Activated function will blink when this screen
is visualized.
Status Visualization: This screen shows activated
functions and regulation outputs (compressor,
ventilators).
Setpoint Menu: This screen enables the modification of
the Set Point values.
Temperature Setpoint: to see and modify the
temperature setpoint value.
Programming Mode: This screen enables the
modification of the parameters.
Parameter Menu - ALL: enables the modification of all
parameter values.

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 8/38
Parameter Menu - GrP: Parameters are grouped as
logic function (ex. regulation, defrost, etc.)
X9: it is possible to create the label of the parameter to
be visualized or modified.
Password menu: insert the password to see and
modify the protected (level Pr2) parameters
Info: To scroll all I/O variables and status (probes,
digital inputs, digital outputs, etc.)
Stand-By: in this condition all outputs are deactivated.
HotKey Download: frame animation is on during
download operations (copy from HotKey to the internal
memory)
HotKey Upload: frame animation is on during during
upload operations (copy from internal memory to the
HotKey)
Device Locked: V-Swipe from Home screen to lock or
unlock the device
Device Unlocked: V-Swipe from Home screen to lock
or unlock the device
4.2 ICONS
DESCRIPTION
MODE
FUNCTION
LIGHT
OFF
Function not available
FLASH
When in the Virtual Keyboard screen: light output ON
ON
When in the Virtual Keyboard screen: light output OFF
COMPRESSOR
OFF
When in the Loads Info screen: compressor output OFF
FLASH
Anti short cycle delay is running
ON
When in the Loads Info screen: compressor output ON

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 9/38
4.3 GESTURES
GESTURE
NAME
HOW-TO
DESCRIPTION
ONE TAP
Press a specific area
of the screen with a
finger for 1 sec
Switch ON / Switch OFF: when in Virtual
Keyboard, use this to turn on/off a specific
function. When in Programming mode, use this to
select a parameter or a parameter value.
TAP and
HOLD
Press any place of
the screen with a
finger for 1 or 3 sec
(depending on par.
bPt)
Enter / Save: use this to enter Programming
mode or Parameter menu and to save
modifications. When in Virtual Keyboard, use this
on the “ONOFF” to switch OFF and ON the
device.
H-SWIPE
Drag a finger across
the screen, from left
to right or from right
to left
Browse: use horizontal swipe (right to left or left
to right) to browse through HOME, Virtual
Keyboard and Info View. When in programming
mode: use horizontal swipe to browse through
parameter menu.
FAN
OFF
When in the Loads Info screen: evaporator fan output OFF
FLASH
Activation delay is running
ON
When in the Loads Info screen: evaporator fan output ON
DEFROST
OFF
Function not available
FLASH
When in the Virtual Keyboard screen: defrost ON
ON
When in the Virtual Keyboard screen: defrost OFF
AUX
OFF
Function not available
FLASH
When in the Virtual Keyboard screen: AUX output ON
ON
When in the Virtual Keyboard screen: AUX output OFF
ENERGY SAVING
OFF
Function not available
FLASH
When in the Virtual Keyboard screen: energy saving ON
ON
When in the Virtual Keyboard screen: energy saving OFF
FUNCTION
OFF
Function not available
FLASH
When in the Virtual Keyboard screen: function ON (see par. b2C)
ON
When in the Virtual Keyboard screen: function OFF (see par. b2C)
ALARM
OFF
No alarm is active
FLASH
ON
Some alarm is active
Celsius Degree
OFF
Not used
FLASH
Not used
ON
Measurement units: Celsius degree
Fahrenheit Degree
OFF
Not used
FLASH
Not used
ON
Measurement units: Fahrenheit degree
ONOFF
OFF
FLASH
ON
Only and always ON icon when the device is in standby mode
BACK
OFF
FLASH
ON
Used to go back to previous levels on the menu tree
ENTER
OFF
Save command not available
FLASH
ON
Save command available

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 10/38
V-SWIPE
Drag a finger across
the screen, from top
to bottom or from
bottom to top
(overlapping only one
of the digits)
Modify: use vertical swipe (from top to bottom or
bottom to top) to change a parameter value.
4.4 HOME BROWSING
Use H-SWIPE to move through the screens. The logic implements a circular browsing: H-SWIPE to left or to
right is possible. A programmable timeout is implemented to return HOME from any lateral screen.
4.5 STATUS VISUALIZATION
Depending on par. SC7 it is possible to visualize both the active outputs and functions when in HOME screen.
In particular:
- SC7=n: active outputs or functions never visualized when in HOME screen
- SC7=Y: both active outputs or functions visualized when in HOME screen, for 3 sec, and only after
touching the display anywhere.
SC7=ovr: active outputs or functions always visualized (overlapped) when in HOME screen
4.6 STAND-BY MODE
When in HOME screen, H-swipe to go to the Virtual Keyboard screen and then touch the OFF icon for 3 sec.
The beginning of this action will trigger an animation effect (a “snake” moving effect of the frame around the
icons). to All outputs and alarms are deactivated in Stand-by mode.

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 11/38
4.7 VIRTUAL KEYBOARD
The Virtual Keyboard present some direct access function which can be enabled by touching the relative icon.
The activation of any function will trigger an animation effect (a “snake” moving effect on the display) and, at
the end, a segment above the function icon (or below, depending on the position of the icon) will be lit.
4.8 LOCK AND ULOCK DEVICE
It is possible to lock the device:
- Swiping-up (V-SWIPE) from HOME and then by touching the display anywhere (1 or 3 sec depending
on par. bPt).
- Activating the “auto lock” function through a timer (par. SCA).
When locked, every action on the device will show a “LoC” blinking icon.
It is possible to unlock the device:
Swiping-up (V-SWIPE) from HOME and then by touching the display anywhere (1 or 3 sec depending on par.
bPt).
4.9 SETPOINT MENU
When in Setpoint Menu SEt, it is possible to enter the Temperature Setpoint modification by touching the
display anywhere (1 or 3 sec depending on par. bPt). The label indicates that the modification of the
temperature set point is enabled. Adjust the value through some V-SWIPE gestures on the top of every
single digit and then confirm the new value by pressing the SET icon. Press the BACK icon to exit (come
back to the Setpoint Menu) without saving.
4.10HOTKEY –UPLOAD
a.
It is possible to use the HotKey Upload Menu function to save the current device configuration (parameter
values) into the external memory. To do this, follow these instructions:
1. H-swipe to go on the UPL screen

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 12/38
2. Insert the HotKey (on the 5-pin ports on the back of the device)
3. Touch the the display anywhere (1 or 3 sec depending on par. bPt)
4. The copying procedure will start and will trigger an animation effect (a “snake” moving effect on the
display).
5. At the end of the copying procedure, a message will notify the user that the operation has been
competed successfully:
a. End: all parameters have been copied
Err: some error occours during copying operations
4.11HOTKEY –DOWNLOAD
When in Power-off or in Stand-by mode, it is possible to activate the HotKey Download Menu function to
copy a new configuration (parameter values) into the current device memory. To do this, follow these
instructions:
1. Insert the HotKey (on the 5-pin ports on the back of the device)
2. Touch the OFF icon for 3 sec
3. After power-on, the copying procedure will start automatically and will trigger an animation effect (a
“snake” moving effect on the display).
4. At the end of the copying procedure, a message will notify the user that the operation has been
competed successfully:
a. End: all parameters have been copied
Err: some error occours during copying operations
4.12INFO MENU
The Info Menu shows the I/O values relative to the “inF” group:
- dP1 to dP4 = probe inputs values
- di1 to di3 = digital inputs status
- ro1 to ro4 = digital outputs status
- Ao1, Ao2 = analogue output values

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 13/38
4.13PARAMETER MENU
From the PRG screen is possible to unlock the programming menu by touching any area of the display (1 or
3 sec depending on par. bPt).
4.14PARAMETER MENU - ALL
From PrG screen it is possible to enter the Parameter Menu - ALL touching the display anywhere (1 or 3
sec depending on par. bPt).
…
From Parameter Menu - ALL, it is possible to enter and browse the list of available parameters by using the
H-swipe gesture. All parameters present into level Pr1 are immediately visible. To enter parameters into level
Pr2 the password must be inserted.
4.15PARAMETER MENU - GrP
From Parameter Menu - ALL menu it is possible to move on the Parameter Menu - GrP swiping left (H-swipe
gesture). From Parameter Menu - GrP it is possible to enter the available group of parameters touching the
display anywhere (1 or 3 sec depending on par. bPt). It is possible to browse through the available groups of
parameters by using the H-swipe gesture. The circular construction of this menu permits to move left or right
through the groups. All parameters present into level Pr1 are immediately visible. To enter parameters into
level Pr2 the password must be inserted.
…

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 14/38
Here are the available groups:
NOTE: depending on the configuration, some parameters or entire groups of them could not be available.
Group Label
Description
rEG
Main regulation parameters
Prb
Probe configuration parameters
diS
Visualization parameters
dEF
Defrost configuration parameters
FAn
Evaporator and condenser fan configuration parameters
AUS
Auxiliary regulator parameters
ALr
Alarm configuration parameters
oUt
Digital and analogue output configuration parameters
inP
Digital input configuration parameters
ES
Energy saving configuration parameters
Cnt
Counters, read only values
rtC
Real Time Clock configuration parameters
E2
Memory storage management
CoM
Serial Communication port configuration parameters
Ui
User Interface configuration parameters
inF
Information, read only parameters
4.16PASSWORD MENU
When in the PAS menu, it is possible to set the password value by touching the display anywhere (1 or 3 sec
depending on par. bPt). Use V-swipe on every single digit to modify the value, then confirm the password
value pressing the SET icon (1 or 3 sec depending on par. bPt).
The inserted value will blink and then the display will show:
•Pr2 if the password is correct
•Err if the password value is wrong
After 2 sec the display will show the Parameter menu –ALL with a blinking decimal point to indicate that
protected parameters now are editable. Protected parameters will be now editable from all sub menus (ALL,
GrP and X9) and until exiting the Programming mode.
4.17X9
Every parameter is normally identified by a unique label that can have two or three alphanumeric characters.
When in the “X9” Screen, it is possible to create the parameter label by swiping-up every single part of the
label itself (first, second and third char). The system is able to drive the user through the available symbols,
showing only the available ones to speed up the creation of the label.
For example, if a modification of the “interval between defrosts” parameters is required (label “idF”), these
are the steps to follow:
•Enter the X9 screen
•Swipe-up or down the first char position (lower segment on the left) until char “i” (lowercase) appears

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 15/38
•Move to the second char position (segment in the middle) and swipe-up or down until char “d”
appears
•Move on the third char position (segment on the right) and swipe-up or down until char “F” appears
•Enter the par. value by touching the PRG icon for 3 sec.
NOTE: pay attention to the upper or lower case when browsing through the available characters.
For simplicity, here is the complete list of available characters: A, b, C, d, E, F, G, H, i, L, M, n, o, P, q, r, S, t,
u, V, Y, 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9
5.PARAMETER TABLE
Here are the descriptions of the device parameters.
Note: Some of these parameters below may not be present in this version; please see the configuration
parameter paragraph.
Pr1
Parameter present into Pr1 level
Pr2
Parameter present into Pr2 level (gray shaded cells)
5.1 PARAMETER DESCRIPTION
5.1.1 Main regulation parameters - rEG
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
SEt
Set Point
LS to US
Range from LS to US.
3.0
LS
Minimum Set point
[-100.0°C to SET]
[-148.0°F to SET]
Define the minimum value for the set
point.
-100.0
US
Maximum Set point
[SET to 150.0°C]
[SET to 302.0°F]
Define the maximum value for the set
point.
150.0
HY
Compressor regulation differential
in normal mode
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Set point differential. Compressor Cut-IN
is T>SET+HY. Compressor Cut-OUT is
T<=SET.
3.0
HYE
Compressor regulation differential
in energy saving mode
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Set point differential in energy saving
mode. Compressor Cut-IN is
T>SET+HES+HYE. Compressor Cut-
OUT is T<=SET+HES.
3.0
HY1
Proportional regulation differential
in normal mode
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Used when a second onoff compressor
or a variable speed compressor is
configured.
3.0
HYS
Proportional regulation differential
in energy saving mode
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Used when a second onoff compressor
or a variable speed compressor is
configured.
5.0
HYd
Deadband output regulation
(oAx=db) differential
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Dead band output (oAx=db) is activated
when T<SET-HYd.
2.0
rAr
Delay between compressor and db
output (oAx=db) activation and
vice versa
0 to 255 min
Used to avoid anti short-cycling between
compressor (oAx=CPx) and dead band
outputs (oAx=db).
0

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 16/38
odS
Output activation delay at start-up
0 to 255 min
This function is enabled after the
instrument power-on and delays the
activation of the outputs.
0
AC
Anti-short cycle delay
0 to 50 min
Delay between first compressor (CP1)
stop and the next restart.
0
AC1
Anti-short cycle delay (2nd
compressor)
0 to 255 min
Delay between second compressor
(CP2) stop and the next restart.
0
2CC
Activation mode for 2nd
compressor
FUL(0); HAF(1)
FUL=delayed respect to main onoff
compressor; HAF=step activation logic,
par. HY1 is used.
FUL
rCC
Enable compressor rotation
n(0); Y(1)
n=compressor 1 is activated always as
first; Y= toggle compressor 1 and
compressor 2 activation.
no
MCo
Maximum time with compressor on
(0=disabled)
0 to 255 min
Define the maximum running time for
onoff compressors.
0
Cdd
Compressor selection with hot gas
defrost
CP1; CP2; 2CC
CP1=only compressor CP1 is activated
during any defrost; CP2=only
compressor CP1 is activated during any
defrost; 2CC=both compressors CP1 and
CP2 are activated during any defrost
2C
rtr
Regulation percentage=F(P1; P2)
(100=P1; 0=P2)
0 to 100
Weighted coefficient for double probe
(P1 and P2) regulation
R=P1*(rtr/100)+P2*(1-rtr/100). If rtr=100:
only P1 value is used. If rtr=0: only P2
value is used.
100
CCt
Maximum duration for Pull Down
0.0 to 23h50min
When this interval ends, the Pull Down
function is immediately stopped
00:00
CCS
Pull Down phase differential
(SET+CCS or SET+HES+CCS)
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
During any Pull Down, the regulation
SETPOINT is moved to SET+CCS (in
normal mode) or to SET+HES+CCS (in
energy saving mode)
0.0
oHt
Threshold for automatic activation
of Pull Down in normal mode
(SET+HY+oHt)
[0.0°C to 25.0°C]
[0.0°F to 45.0°F]
This is the upper limit used to
automatically activate the Pull Down
function
10.0
oHE
Threshold for automatic activation
of Pull Down in energy saving
mode (SET+HES+HYE+oHE)
[0.0°C to 25.0°C]
[0.0°F to 45.0°F]
This is the upper limit used to
automatically activate the Pull Down
function in energy saving mode.
10.0
Con
Compressor ON time with faulty
probe
0 to 255 min
Interval with compressor output ON in
case of faulty regulation probe. With
Con=0 compressor output is always OFF
10
CoF
Compressor OFF time with faulty
probe
0 to 255 min
Interval with compressor output OFF in
case of faulty regulation probe. With
CoF=0 compressor output is always ON
15
5.1.2 Probe configuration parameters –Prb
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
P1C
Probe P1 selection
ntC(0); Pt1(1);
PtC(2)
ntC= NTC probe; Pt1= PT1000 probe
ntC
P2C
Probe P2 selection
ntC(0); Pt1(1);
PtC(2)
ntC= NTC probe; Pt1= PT1000 probe
ntC
P3C
Probe P3 selection
ntC(0); Pt1(1);
PtC(2)
ntC= NTC probe; Pt1= PT1000 probe
ntC
P4C
Probe P4 selection
ntC(0); Pt1(1);
PtC(2); Cur(3)
ntC= NTC probe; Pt1= PT1000 probe
ntC
ot
Probe P1 calibration
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
Allows to adjust any possible offset of the
probe P1.
0.0
P2P
Probe P2 presence
n(0); Y(1)
n = not present; Y = present
yes
oE
Probe P2 calibration
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
Allows to adjust any possible offset of the
probe P2.
0.0

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 17/38
P3P
Probe P3 presence
n(0); Y(1)
n = not present; Y = present
no
o3
Probe P3 calibration
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
Allows to adjust any possible offset of the
probe P3.
0.0
P4P
Probe P4 presence
n(0); Y(1)
n = not present; Y = present
no
o4
Probe P4 calibration
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
Allows to adjust any possible offset of the
probe P4.
0.0
5.1.3 Visualization parameters –diS
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
CF
Temperature measurement unit:
Celsius; Fahrenheit
°C(0); °F(1)
Select the measurement unit for
temperature: °C = Celsius; °F =
Fahrenheit
°C
rES
Temperature resolution: decimal,
integer
dE(0); in(1)
Select the resolution for temperature: dE
= decimal; in = integer
dE
Lod
Probe default displayed
P1(0); P2(1); P3(2);
P4(3); SEt(4); dtr(5)
Px=probe “x”; Set=set point; dtr=probe
visualization percentage.
P1
dLY
Temperature display delay
(resolution 10 sec)
0.0 to 20min00sec
Visualization filter used when the
temperature increases: the display is
updated of 1°C or 1°F after dLY interval.
00:00
dtr
Probe visualization percentage,
F(P1; P2)
1 to 99
Setting dtr=1 the display will show this
value VALUE=0.01*P1+0.99*P2
99
5.1.4 Defrost configuration parameters –dEF
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
EdF
Defrost mode
rtC(0); in(1)
Define the defrost timed control: in=fixed
intervals; rtC=following real time clock
in
tdF
Defrost type: electric heating, hot
gas
EL(0); in(1)
Define the defrost mode: EL=electrical
heaters; in=hot gas
EL
dFP
Probe selection for defrost control
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP=no probe; Px=probe “x”
P2
dtE
End defrost temperature
[-50.0°C to 50.0°C]
[-58.0°F to 122.0°F]
Define the temperature threshold,
measured by the evaporator probe
(dFP), which causes the end of current
defrost cycle
8.0
idF
Interval between two successive
defrost cycles
0 to 120 hours
Determines the time interval between the
beginning of two defrosting cycles. Valid
when EdF=in.
24
MdF
Maximum length of defrost cycle
0 to 255 min
When dFP=nP (no evaporator probe
presence) it sets the defrost duration.
When dFP=Px (defrost end based on
temperature measured by probe Px) it
sets the maximum length for the defrost
cycle. If PxP=n (probe not present or not
configured) MdF works as defrost
duration.
20
dSd
Start defrost delay
0 to 999 sec
A fixed delay is applied to any manual
defrost activation
0
StC
Compressor off-cycle before
starting any defrost
0 to 255 sec
Interval with compressor OFF before
activating any hot gas defrost cycle
0
dFd
Displaying during defrost
rt(0); it(1); SEt(2);
dEF(3); Coo(4)
rt = show always the real temperature; it
= show always the start defrost
temperature; SEt = show always the
Setpoint value; dEF = show the label
“dEF”; Coo = show the label “dEF” during
defrost and the label “Coo” after defrost
and draining until T>SET+HY
dEF

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 18/38
dAd
Temperature display delay after
any defrost cycle
0 to 255 min
delay before updating the temperature on
the display after the end of any defrost.
0
Fdt
Draining time
0 to 255 min
during a draining phase the regulation is
stopped.
1
Hon
Drain heater enabled after draining
time (par. Fdt)
0 to 255 min
The relative output will stay on after
draining time. Used only after a defrost
phase.
2
dPo
Defrost cycle enebled at stat-up
n(0); Y(1)
Enables a defrost at power on
no
HYP
Differential temperature during any
pre-defrost phase
[-12.0°C to 12.0°C]
[-21.6°F to 21.6°F]
Move the regulation setpoint to the value
SET-HYP during dAF interval
0.0
Pd2
Defrost output deactivation delay
0 to 255 sec
Delay the defrost output deactivation
0
dAF
Pre-defrost time
0 to 255 min
Interval for pre-defrost function
0
od1
Automatic defrost (at the beginning
of any energy saving)
n(0); Y(1)
n=function disabled; Y=function enabled
no
od2
Optimized defrost
n(0); Y(1)
n=function disabled; Y=function enabled
no
dSt
Temperature sampling time during
an optimized defrost (valid only if
od2=yes)
1 to 255 sec
Timed control of the evaporator
temperature. Used only with od2=Y
30
SYd
Tipe of synchronized defrost
nu; SYn; nSY
nu=not used; Syn=synchronized defrost;
nSY=desynchronized defrost.
nU
dt1
Differential temperature for latent
heating control
0.1°C to 1.0°C
Timed control of the evaporator
temperature. Used only with od2=Y.
0.1
ErS
Restart regulation after dripping
and if SYd=nSY
n(0); Y(1)
n=the controller waits for all controllers to
finish their defrost operations before
restart regulation. Y=the controller restart
regulation after dripping phase, without
waiting for the others to finish their
defrost operations.
no
5.1.5 Evaporator and condenser fan configuration parameters - FAn
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
FAP
Probe selection for evaporator fan
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP=no probe; Px=probe “x”
nP
FSt
Evaporator fan stop temperature
[-50.0°C to 50.0°C]
[-58.0°F to 122.0°F]
Evaporator fan will stop when the
measured temperature (from probe FAP)
is T>FSt.
10.0
HYF
Evaporator fan regulator
differential
[0.1°C to 25.0 °C]
[0.1°F to 45.0°F]
Evaporator fan will start when the
measured temperature (from probe FAP)
is T<FSt-HYF.
2.0
FnC
Evaporator fan operating mode
C_n(0); O_n(1);
C_Y(2); O_Y(3)
• Cn = runs with the compressor, duty-
cycle when compressor is OFF (see FoF,
Fon, FF1 and Fo1 parameters) and OFF
during defrost
• on = continuous mode, OFF during
defrost
• CY = runs with the compressor, duty-
cycle when compressor is OFF (see FoF,
Fon, FF1 and Fo1 parameters) and ON
during defrost
• oY = continuous mode, ON during
defrost
C_n
Fnd
Evaporator fan delay after defrost
cycle
0 to 255 min
Delay before evaporator fan activation
after any defrosts.
1
FCt
Differential temperature for cyclic
activation of evaporator fans
(0=disabled)
[0°C to 50°C] [0°F
to 90°F]
Used to reduce anti short-cycling for
evaporator fans.
0

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 19/38
FSU
Evaporator fan operating mode
Std(0); FoF(1);
Fon(2)
Std = standard mode, evaporator fan
follows par FnC; Fon = evaporator Fan
always on; FoF = evaporator fan always
off
Std
Ft
Evaporator fan controlled during
defrost
n(0); Y(1)
n = evaporator fan follows par. FnC
during any defrost; Y = evaporator fan
regulator is active during any defrost
no
Fon
Evaporator fan ON time in normal
mode (with compressor OFF)
0 to 255 min
Used in normal mode. Interval with
evaporator fan forced ON when
compressor is OFF.
5
FoF
Evaporator fan OFF time in normal
mode (with compressor OFF)
0 to 255 min
Used in normal mode. Interval with
evaporator fan forced OFF when
compressor is OFF.
10
Fo1
Evaporator fan ON time in energy
saving (with compressor OFF)
0 to 255 min
Used in energy saving. Interval with
evaporator fan forced ON when
compressor is OFF.
5
FF1
Evaporator fan OFF time in energy
saving (with compressor OFF)
0 to 255 min
Used in energy saving. Interval with
evaporator fan forced OFF when
compressor is OFF.
10
Fd1
Evaporator fan delay
0 to 255 sec
Delay before activating evaporator fan
0
Fd2
Evaporator fan delay after closing
door
0 to 255 sec
Delay before activating evaporator fan
and after closing the door
0
FAC
Probe selection for condenser fan
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP=no probe; Px=probe “x”
10
St2
Set Point 2 Regulation (for
condenser fan)
[-100.0°C to
150.0°C] [-148.0°F
to 302.0°F]
Condenser fan will stop when the
measured temperature (from probe FAC)
is T<St2.
5
HY2
Set Point 2 differential (for
condenser fan)
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Condenser fan will start when the
measured temperature (from probe FAC)
is T>St2+HY2.
10
FCC
Condenser fan operating mode
C_n(0); O_n(1);
C_Y(2); O_Y(3)
• Cn = runs with the compressor and
OFF during defrost
• on = continuous mode, OFF during
defrost
• CY = runs with the compressor and ON
during defrost
• oY = continuous mode, ON during
defrost
0
Fd3
Condenser fan activation delay
0 to 255 sec
Delay before activating condenser fan
0
Fd4
Condenser fan deactivation delay
0 to 255 sec
Delay before deactivating condenser fan
10
5.1.6 Auxiliary regulator parameters –AUS
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
ACH
Type of control for auxiliary
regulator
CL(0); Ht(1)
CL = regulator works as "cooling"; Ht =
regulator works as "heating"
CL
SAA
Set point for auxiliary regulator
[-100.0°C to
150.0°C] [-148.0°F
to 302.0°F]
Define the temperature set point to
switch the auxiliary relay.
5.0
SHY
Auxiliary regulator differential
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Differential for auxiliary output set point:
• ACH=CL, AUX Cut in is [SAA+SHY];
AUX Cut out is SAA.
• ACH=Ht, AUX Cut in is [SAA–SHY];
AUX Cut out is SAA.
2.0
ArP
Probe selection for auxiliary
regulator
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP = no probe, the auxiliary relay is
switched only by the digital input;
Px=probe “x”.
nP

1592040000 XR20-30-60-70T EN v1.5 2023.10.12.docx XR20-30-60-70T 20/38
Sdd
Auxiliary regulator disabled during
any defrost cycle
n(0); Y(1)
n = the auxiliary relay operates during
defrost. Y = the auxiliary relay is switched
off during defrost
no
btA
Base time for parameters Ato and
AtF
SEC; Min
SEC = base time is in second; Min =
base time is in minutes.
Sec
Ato
Interval of time with auxiliary output
ON
0 to 255 sec/min
Auxiliary output ON time (with base time
defined by par. btA)
0
AtF
Interval of time with auxiliary output
OFF
0 to 255 sec/min
Auxiliary output OFF time (with base time
defined by par. btA)
0
5.1.7 Alarm configuration parameters - ALr
LABEL
DESCRIPTION
RANGE
MEANING
VALUE
ALP
Probe selection for temperature
alarms
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP=no probe; Px=probe “x”
P1
ALC
Temperature alarms configuration:
relative, absolute
rE(0); Ab(1)
Type of alarm threshold: Ab = absolute;
rE = relative (to the Setpoint)
Ab
ALU
High temperature alarm
°C[0.0° to 50.0° o
ALL to 150.0°]
°F[0.0° to 90.0° o
ALL to 302.0°]
When this temperature is reached, the
alarm is enabled after the ALd delay
time.
• If ALC=Ab: ALL to 150.0°C or ALL to
302°F.
• If ALC=rE: 0.0 to 50.0°C or 0 to 90°F
150.0
ALL
Low temperature alarm
°C[0.0° to 50.0° o -
100.0°C to ALU]
°F[0.0° to 90.0° o -
148.0°F to ALU]
When this temperature is reached, the
alarm is enabled after the ALd delay
time.
• If ALC=Ab: -100.0°C to ALU or -148°F
to ALU.
• If ALC=rE: 0.0 to 50.0°C or 0 to 90°F.
-100.0
AFH
Temperature alarm differential
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Differential for alarm deactivation
2.0
ALd
Temperature alarm delay
0 to 255 min
Delay between the detection of an alarm
condition and the relative alarm
signaling.
0
dot
Temperature alarm delay with
open door
0.0 to 24min00sec
Delay between the detection of a door
open condition and the relative alarm
signaling.
00:00
dAo
Temperature alarm delay at start-
up
0.0 to 24h00min
Delay between the detection of a
temperature alarm condition and the
relative alarm signaling at power-on.
00:00
AP2
Probe selection for 2nd
temperature alarm
nP(0); P1(1); P2(2);
P3(3); P4(4)
nP=no probe; Px=probe “x”.
nP
AU1
Pre-alarm threshold for 2nd
temperature alarm (absolute value)
[-100.0°C to
150.0°C] [-148.0°F
to 302.0°F]
Warning alarm threshold, message
“AU1” is visualized on the display
150.0
AH1
2nd high temperature pre-alarm
differential
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Differential for pre-alarm deactivation.
2.0
Ad1
2nd high temperature pre-alarm
delay
0 to 255 min
Delay between the detection of any pre-
alarm condition and the relative alarm
signaling
255
AL2
2nd low temperature alarm
[-100.0°C to
150.0°C] [-148.0°F
to 302.0°F]
Lower threshold for second temperature
alarm.
-100.0
AU2
2nd high temperature alarm
[-100.0°C to
150.0°C] [-148.0°F
to 302.0°F]
Upper threshold for second temperature
alarm.
150.0
AH2
2nd temperature alarm differential
[0.1°C to 25.0°C]
[0.1°F to 45.0°F]
Differential for second alarm
deactivation.
2.0
Ad2
2nd temperature alarm delay
0 to 255 min
Delay between the detection of any
alarm condition and the relative alarm
signaling
0