Emerson Dixell XWi70K Wiring diagram

1592026640 XWi70K GB r1.0 04.06.2020 XWi70K 1/8
XWi70K
STANDARD CONTROLLER
FW REL. 21.4
1GENERAL WARNING......................................................................................................... 1
2GENERAL DESCRIPTION.................................................................................................. 1
3FIXED SPEED COMPRESSOR CONTROL......................................................................... 1
4DEFROST...........................................................................................................................1
5FAN MANAGEMENT........................................................................................................... 1
6EVAPORATORFAN CONTROL.......................................................................................... 1
7CONDENSER FAN CONTROL............................................................................................ 2
8AUXILIARY REGULATORS.................................................................................................2
9SPECIAL FUNCTIONS........................................................................................................ 2
10 KEYBOARDS......................................................................................................................2
11 CONTROLLER INTERFACE............................................................................................... 3
12 PROGRAMMING MODE.....................................................................................................3
13 PARAMETER LIST ............................................................................................................. 4
14 DIGITAL INPUT .................................................................................................................. 6
15 HOW TO INSTALL AND MOUNT........................................................................................ 6
16 ELECTRICAL CONNECTIONS............................................................................................ 6
17 TTL/RS485 SERIAL LINE....................................................................................................6
18 HOW TO USE OF THE “HOT KEY”..................................................................................... 6
19 ALARM SIGNALS............................................................................................................... 6
20 TECHNICAL DATA ............................................................................................................. 7
21 WIRING DIAGRAMS...........................................................................................................7
22 DEFAULT PARAMETER MAPS.......................................................................................... 7
1GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
This manual is part of the product and should be kept near the instrument for easy and quick
reference.
The instrument shallnot be used for purposes different fromthose described hereunder. It cannot
be used as a safety device.
Check the application limits before proceeding.
Dixell S.r.l. reserves the right to change the composition of its products, even without notice,
ensuring thesame and unchanged functionality.
1.2 SAFETY PRECAUTIONS
Check the supply voltage is correct before connecting the instrument.
Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of condensation
Warning: disconnect allelectrical connections before any kind of maintenance.
Fit the probe where it is not accessible by the End User. The instrument must not be opened.
In case of failure or faulty operation send the instrument back to the distributor or to “Dixell S.r.l.”
(see address) with a detailed description of the fault.
Consider the maximum current which can be applied to each relay (see Technical Data).
Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
Incase of applications in industrialenvironments, the useof mainsfilters (our mod. FT1) in parallel
with inductive loads could be useful.
2GENERAL DESCRIPTION
Model XWi70K is a microprocessor-based controller suitable for applications on medium or low
temperature refrigerating units. It must be connected by means of a two-wire shielded twisted cable (
1mm) at a distance of up to 30 meters to the keyboard CH620, T620T/H or T820T/H. It is provided with
five relay outputs to control compressor, defrost (which can be either electrical or hot gas), evaporator
and condenser fans and light or alarm. It is also provided with 4 NTC, PTC or PT1000 probe inputs.
The HOTKEY I/O port allows connecting the unit, by means of the external module XJ485-CX, to a
network line ModBUS-RTU compatible such as an X-WEB monitoring system. With the HOTKEY port
it is possible to modify the configuration of the controller (by using the Wizmate Progtool Kit).
The instrument is fully configurable and it can be easily programmed through an external keyboard.
3FIXED SPEED COMPRESSORCONTROL
The regulation uses the temperature measured by the regulation probe with a positive differential from
the set point: if the temperature increases and reaches set point plus differential the compressor is
started and then turned off when the temperature reaches the set point value again. In case of any
regulation probe fault, the compressor management will switch to fixed ON/OFF time mode, as set in
the parameters Con and CoF.
3.1 DOUBLE FIXED SPEED COMPRESSOR CONTROL
The controller can drive double compressor circuits. To do this, a couple of relays need to be properly
configured: oAx=CP1 and oAy=CP2. (do not use oA5 for compressor management). The parameters
used for this kind of regulation are the following:
AC Compressor anti-short-cycle delay
AC1 Second compressor anti-short-cycle delay
2CC Activation mode for second compressor (valid if oAx=CP1 and oAy=CP2)
rCC Compressors rotation enabled
Cdd Maximum time with compressor active
The second compressor output isactivated by following the 2CC parameter:
-If 2CC=FUL then in parallel with the relay of the first compressor (CP1), with a possible
delay as set in the AC1 parameter. Both compressors are switched off at the same time.
-If 2CC=HAF then only if the temperature T>SET+HY+HY1. The delay AC1 is always
respected. The second compressor is deactivated when T<SET+HY.
With parameter rCC it is possible to enable the compressor rotation function: the activation of the first
and the second compressor will be alternated to equalize the number of working hours of both of them.
In case of hot gas defrost operation, it is possible to select if one or both compressors will be used.
3.2 PULL DOWN
When defrost is not in progress, it can be activated by keeping the UP button pressed for 3 sec. The
compressor will operate to reach the CCS set point by the time set through the CCt parameter. The
cycle can be terminated before the end of the CCt time by using the same activation button (keeping
the UP pressed for 3 sec when PULL DOWN is running)
4DEFROST
Two defrost modes are available through the tdF parameter: defrost through electrical heater
(tdF=EL) and hot gas defrost (tdF=in).
The defrost interval depends on the presence of the RTC (optional). The internal RTC is controlled by
means of the EdF parameter:
-EdF=in: the defrost is made every idF time – standard wayfor controller without RTC.
-EdF=rtC: the defrost is real time controlled, depending on the day enabled in the parameters
dd1…dd7 and the hours set in the parameters Ld1...Ld6.
Other parameters are used to control defrosting cycles: the maximum length (MdF) and defrosting
modes: timed or controlled by the evaporator’s probe (P2P).
At the end of defrost dripping time is started, its length is set in the Fdt parameter. With Fdt=0 the
dripping time is disabled.
4.1 SYNCHRONIZED DEFROST
This defrost function requires:
-To set adigitalinput of any controller as ixF=dEF
-To connect (by wire) alldigital inputs set as ixF=dEF
A maximum number of 20 controllers can be used in this configuration.
The Synchronized defrost mode is enabled by par. SYd=SYn. After any defrost request (received by
RTC, timed by par. idF, manually by defrost button or by digital input set as dEF), all controllers will
activate their own defrost phase. The first controller which ends its defrost phase will release the defrost
line and load its dripping time. At the end of the dripping time the normal regulation will restart.
The other controllers follow the same logic.
4.2 DE-SYNCRONIZED DEFROST
This defrost function requires:
-To set adigitalinput of any controller as ixF=dEF
-To connect (bywire) all digitalinputs set as ixF=dEF
A maximum number of 20 controllers can be used in this configuration.
The De-Synchronized defrost mode is enabled by par. SYd=nSY. After any defrost request (received
by RTC, timed by par. idF, manually by defrost button or by digital input set as dEF), allcontrollers will
load a random delay. The first controller which ends the random delay will retain the ixF=dEF line to
signal to the other controllers that they have to wait before starting their own defrost phases. When the
first controller ends its defrost phase, it will release the ixF=dEF line. The other ones will repeat the
same procedure. The totaldefrost phase willend when allcontrollers complete their owndefrost phases.
NOTES:
-take care about the time available to complete the defrost phase. It must be used for selecting
the proper MdF value
-all controllers in waiting mode willkeep on the normal regulation
4.3 RANDOM DEFROST
A random defrost mode can be enabled by par. Syd=rnd. After any defrost request (received by RTC
or timed by par. idF) a random delay will be added. At the end of the added delay the defrost will start.
The random function lead to desynchronize the start of the defrost phases in those cases where more
than a cabinet is installed in the same “island”. The maximum defrost delay is linked to the following
parameters:
-Mdf=maximum time for any defrost
-ndE=delaymultiplier
by the following formula:
MAX_DEFROST_DELAY = Mdf*ndE (min)
For example: if ndE=10 and Mdf=20 min, this means that the total interval of time used by any device
for complete its defrost phase is 200 min (worst case).
NOTE:
-take care about the interval of time available for defrost. It must be used for selecting both MdF
and ndEvalues
-the higher is the ndE value and the better is the result in terms of desynchronization. On the
other side, the longer will be the total interval of time required to complete defrosts
5FAN MANAGEMENT
The controller can manage the following type of fans:
-Fixed speed fans (oAx=FAn, Cnd)
6EVAPORATORFAN CONTROL
The evaporator fan control mode is selected by means of the FnC parameter:
FnC = C_n: fans will switch ON and OFF with the compressor and not run during defrost;
FnC = o_n: fans will run even if the compressor is off, and not runduring defrost;
After defrost, there is a timed fan delay allowing for drip time, set by means of the Fnd parameter.
FnC = C_Y: fans will switch ON and OFF with the compressor and run during defrost;
FnC = o_Y: fans will run continuously also during defrost.
The par. FAP is used to select which temperature probe will be used from the evaporator fan regulator.
A specific setpoint (par. FSt) provides the temperature value, detected by theevaporator probe, above
which the fans are always OFF. This is used to make sure circulation of air only if his temperature is
lower than set in FSt-HYF.
6.1 FORCED ACTIVATION FOR FANS
This function, managed by the FCt parameter, is designed to avoid short cycles of fans, that could
happen when the controller is switched on or after a defrost, when the room air warms the evaporator.

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If the difference between the evaporator temperature and the room temperature is higher than the FCt
value, the controller will activate the fans. This function is disabled if FCt=0.
6.2 CYCLIC ACTIVATION OF THE FANS WHEN THE COMPRESSOR IS
SWITCHED OFF
When FnC=C-n or C-Y (fans in parallel to the compressor), the fans will be able to carry out on and off
cycles even if the compressor is switched off. The on and off interval of time follow the Fon and FoF
parameters. When thecompressor is stopped, the fans will go onworking for the Fontime. On theother
side, with Fon=0 the fans will stay always off when the compressor is off.
7CONDENSER FAN CONTROL
The condenser fan control mode is selected by means of the FCC parameter:
FCC = C_n: fans will switch ON and OFF with the compressor and not run during defrost;
FCC = o_n: fans will run even if the compressor is off, and not run during defrost;
FCC = C_Y: fans will switch ON and OFF with the compressor and run during defrost;
FCC = o_Y: fans will run continuously also during defrost.
The par. FAC is used to select which temperature probe willbe used from the condenser fan regulator.
This regulator uses a specific setpoint (par. St2) and differential (par. HY2) to activate and deactivate
the condenser fans:
-If T>St2+HY2 the condenser fans are activated
-If T<St2 the condenser fans are deactivated.
The par. FCo can be used to keep the ventilators active for a period after compressor OFF.
8AUXILIARY REGULATORS
Up to 2 auxiliary regulators can be used. Both can be linked:
-To a digital output (relay) for ONOFF regulation
-To an analogue output for proportional regulation
The parameters used to configure the auxiliary regulators are the following:
ACH Type of action for auxiliary regulator
SAA Set point for auxiliary regulator
SHY Differential for auxiliary regulator
ArP Probe selection for auxiliary regulator
Sdd Auxiliary regulator disabled during anydefrost
9SPECIAL FUNCTIONS
By using the parameters oAx it is possible to configure the functions of the relay outputs as described
in the following paragraphs:
9.1 LIGHT RELAY (OAX = LIG)
By setting oAx=Lig the relay will work as light relay, it is switched on and off by the light button on the
keyboard and is affected by status of thedigital input when i1F=dor.
The parameter LHt (Light timer) sets the time the light willstay on after pressing the light switchon the
keyboard. Every time the key is pushed the timer is re-loaded.
9.2 SECOND COMPRESSOR MANAGEMENT (OAX = CP2)
By setting one of the parameters oAx=CP2, the correspondent relay will operate as “second
compressor”. It will be activated in parallel with the relay of the first compressor, with a possible delay
set in the AC1 parameter (seconds).
9.3 ON/OFF RELAY (OAX = ONF)
By setting one of the parameters oAx=onF, correspondent the relaywill operate as “on-off” relay: it will
beactivated when the controller isswitched on and it will beswitched off whenthe controlleris in stand-
bystatus.
9.4 ALARM RELAY (OAX=ALR)
By setting oAx=ALr the correspondent relay will work as alarm relay, it is switched on when an alarm
happens.
Parameters involved:
-tbA (n, Y) Alarm relay silencing
-AoP (cL; oP) Alarm relay polarity
9.5 ANTI-SWEAT HEATER (OAX=TIM)
If oAx=tiM, the correspondent relay will be able to work as Anti-Sweat Heater output.
The relay will work based on the parameters btA (base time setting: seconds or minutes), AtF (output
OFF time) and Ato (output ON time) with the following logic: the relay output willcycle (starting with the
OFF time) between OFF and ON status.
9.6 ENERGY SAVING TIMEOUT
If the Energy Saving function has been activated by buttons or digital input, the Energy Saving will be
automatically deactivated once the time defined in the parameter ESt is expired. If the value of ESt=0
the timeout is not considered and the Energy Saving, once activated by button or digital input, can be
deactivated only manually by the user.
9.7 DEAD BAND (OAX=DB)
By setting oAx=db the controller will perform a
“dead band” regulation.
The heating element has to be connected to the
correspondent relay.
If the temperature increases and reaches set
point plus differential (HY) the compressor is
started and then turned off when the temperature
reaches the set point value again.
If the temperature decreases and reaches the set
point minus differential (HY) the output (heater)
is switched on and then turned OFF when the
temperature reaches again the set point.
10 KEYBOARDS
Depending onthe type of keyboard, some specialfunction could be linked to predefined buttons. Follow
here below the complete list of functions:
Normal pressure:
to visualize the temperature set point; in programming mode it selects a
parameter or confirm anoperation.
Timed:
to modify the temperature set point; when max or min temperature value is displayed,
keep it pressed for 3 sec to reset the stored value.
Normal pressure: nu=not special functions; Std=maximum temperature; Lnt
=configuration
change; ALr=alarm list
Timed: nu=not specialfunctions; Std=maximum temperature; CC
=reload default configuration;
ALr=not used; Pdn=Pull Down activation
Normal pressure: nu=not special functions; Std=minimum temperature; Lnt
=configuration
change; ALr=alarm list
Timed: nu=not specialfunctions; Std=maximum temperature; Lnt=configuration change; ALr
=
not used; Pdn=PullDown activation
Normal pressure: nu=not special functions; Pb2=Second probe value; AU1
=auxiliary output 1
activation; AU2=auxiliary output 2 activation
Timed: nu=not specialfunctions; Std=maximum temperature; Lnt=configuration change; ALr=
not used; Pdn=PullDown activation
Normal pressure: nu=not special functions; LiG=light output activation; AU1
=auxiliary output
1 activation; AU2=auxiliary output 2 activation; Lnt=configuration change
Timed: nu=not specialfunctions; LiG=light output activation; AU1
=auxiliary output 1 activation;
AU2=auxiliary output 2 activation; Lnt=configuration change; rSt=reset
Normal pressure: nu=not special functions; oFF=ON OFF function; ES=energy saving
Timed: nu=not special functions; oFF=ONOFF function; ES=energy saving
Normal pressure: nu=not special functions; AU1=auxiliary output 1 activation; AU2
=auxiliary
output 2 activation; LiG=light output activation
Timed: nu=not special functions; AU1=auxiliary output 1 activation; AU2
=auxiliary output 2
activation; LiG=light output activation
Normal pressure: nu=not special functions; ES=energy saving
Timed: nu=not special functions; ES=energy saving
10.1 KEYBOARD LOCK
It is possible to select partial or complete keyboard lock:
-brd: type of lock, UnL=unlock; SEL=only buttons SET and ONOFF are available during
lock condition (factory predefined configuration, not changeable); ALL=all buttons locked.
-tLC: power-on interval before locking keyboard
NOTE: a power-off is required to deactivate the keyboard lock function
10.2 CH620 OR VH620 KEYBOARD
10.3 T620T OR T620H KEYBOARD

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10.4 T820T OR T820H KEYBOARD
10.5 KEY COMBINATIONS
+ To lock and unlock the keyboard.
+
To enter the programming mode.
+
To exit the programming mode.
10.6 USE OF LEDS
Each LED function is described in the following table.
LED MODE Function
ON The compressor is running
FLASHING - Programming Phase (flashing with LED )
- Anti-short cycle delay enabled
ON The fan is running
FLASHING Programming Phase (flashing with LED )
ON The defrost is enabled
FLASHING Drip time in progress
ON - ALARM signal
- In “Pr2” indicates that the parameter is also present in “Pr1”
ON Pull down is running
ON Energy saving enabled
ON Light on
ON Auxiliary output on
°C/°F ON Measurement unit
11 CONTROLLER INTERFACE
HOW TO SET THE CURRENT TIME AND DAY (ONLY WITH RTC)
Whenthe instrument is switched on, it could be necessary to program the real-time clock. This operation
requires to enter the rtC menu (depending on the visibility level) and set the following parameters: HUr
(hours), Min (minutes), dAy (day of the week), dYM (day of the month) Mon (month) and YAr (year).
11.1 HOW TO SEE THE MIN TEMPERATURE
1. Press and release the DOWN key.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the DOWN key or waiting for 5 sec the normal display will be restored.
11.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the UP key.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the UP key or waiting for 5 sec the normal display willbe restored.
11.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
To reset the stored temperature, when max or min temperature is displayed:
1. Press SET keyuntil“rSt” labelstarts blinking.
Note: after the installation remember to RESET the temperature stored.
11.4 HOW TO SEE AND MODIFY THE SET POINT
1. Push and immediately release the SET key: the displaywillshow the Set point value;
2. To change the SEt value, push the UP or DOWN arrows within 10 sec.
3. To save the new set point value push the SET key again or wait for 10 sec.
11.5 TO START A MANUAL DEFROST
1. Push the DEF key for more than 2 sec and a manualdefrost will start.
11.6 ON/OFF FUNCTION (STAND BY)
By pushing the ON/OFF key, the instrument shows “OFF” for 5 sec. and the ON/OFF LED
is switched ON.
During the OFF status, allthe relays are switched OFF and the regulations are stopped; if a
monitoring system is connected, it does not record the instrument data and alarms.
When the instrument is in stand by the keyboard displays “oFF”.
N.B. During the OFF status the Light and AUX buttons are active.
11.7 HOW TO SEE THE PROBE VALUES
1. Enter “Pr1” programming menu.
2. Parameters “dP1”, “dP2”, “dP3” and “dP4” display the value of probes P1, P2, P3 and P4.
12 PROGRAMMING MODE
The configuration parameters are divided in groups (named menu). After entering the programming
mode, the first label corresponding to the first available group (menu) will appear on the display
depending on thevisibility level.Everyparameter belonging to aspecific menuhas its ownvisibilityrules
for placement in PR1 (user accessible parameters) or PR2 (hidden parameters). Any menu can have
parameters placed both in PR1 and/or PR2.
12.1 HOW TO ENTER PARAMETER PROGRAMMING MENU “PR1”
To enter aparameter list under “Pr1” level (user accessible parameters), under a specific menu, operate
as follows:
+ 1. Enter the Programming mode by pressing the SET+DOWN key for 3
seconds.
2. The display will show the first menu available under “Pr1” level
12.2 HOW TO ENTER PARAMETER PROGRAMMING MENU “PR2”
In the PR2 level there are all the parameters of the instrument.
12.2.1 ENTERING THE PARAMETER PROGRAMMING MENU “PR2”
1. Enter the Programming mode by pressing both SET+DOWN buttons for 3 sec: the label of the first
menu available in Pr1 will be displayed (for example: rEG)
2. Release the SET+DOWN buttons and then push them again for 7 sec: during this time both
compressor and fan icon will blink. After 7 sec the “Pr2” label will be displayed immediately, and,
after releasing the SET+DOWN buttons, the first parameter menu available will be displayed (for
example: rEG)
NOW THE PARAMETER MENU “PR2” IS AVAILABLE FOR ANY MODIFICATION
NOTE:
if no parameter is present in the “Pr1” level, after the first 3 sec the “noP” message will be
displayed. Keep SET+DOWN buttons pushed tillthe “Pr2” message will be displayed.
12.2.2 HOW TO MOVE A PARAMETER FROM “PR2” MENU TO “PR1” MENU AND VICE-
VERSA
Each parameter present in the PR2 level can be moved or put into PR1 level (user level) by pressing
SET+DOWN buttons. When in PR2 menu, if a parameter is present also in the First Level (Pr1), the
decimal point will be lit.
12.2.3 HOW TO CHANGE A PARAMETER VALUE
1. Enter the programming mode (both in PR1 or PR2 level)
2. Select the required menu with UP or DOWN
3. Press the SET button to enter the parameter list belonging to the selected menu
4. The first available parameter label (depending on the visibility level) will be displayed. The
compressor icon willblink to indicate the position in the selected menu
5. Select the required parameter by using UP or DOWN buttons.
6. Press the SET key to display the current value (compressor and fan icon starts blinking to indicate
this condition)
7. Use UP or DOWN to change its value.
8. Press SET to store thenewvalue and movetothe following parameter (belonging to thesame menu)
To exit: Press SET+UP or wait for 30 sec without pressing any button.
NOTE:
-the new programming is stored even when the procedure ends by waiting the time-out
-the LIGHT button is used as BACK function when into PROGRAMMING MODE: press it to
exit from a parameter list and return to the upper menu or to discard a parameter value
modification and return to the same parameter label (without changing the previous
parameter value)

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12.3 KEYBOARD CONTROL
+
1
.
Keep both UP and DOWN buttons pressed for 3 sec.
2. The “PoF” message will be displayed and the keyboard is locked. At this point
it is only possible the viewing of the set point or the MAX o Min temperature
stored and to switch ON and OFF the light, the auxiliary output and the
instrument.
TO UNLOCK THE KEYBOARD
Keep both UP and DOWN buttons pressed for 3 sec.
NOTE: if keyboard lock is enabled (see par. brd), then keyboard control function is disabled.
13 PARAMETER LIST
The configurationparametersare divided ingroups (namedmenu)to speed upthe browsing operations.
Here below the list of allMenu with their meaning:
rEG Regulation menu: to set regulation band
Prb Temperature probe menu
vSC Variable Speed Drive menu: to set the VS functionalparameters
vSF Modbus Variable Speed Fan menu: to set Modbus VSF functionalparameters
diS Display menu: to set the visualization rules
dEF Defrost menu: to set thedefrost operationalmode
FAn Fan menu: to set the evaporator and condenser fan control mode
AUS Auxiliary menu: to set the auxiliaryoutput mode
ALr Alarm menu: to set the alarm thresholds
oUt Output menu: to set the function linked to any configurable output
inP Input menu: to set the function linked to any configurable input
ES Energy saving menu: to set the energy saving mode
rtC Real Time Clock menu: to set the internalclock
oth Othersmenu:tosetotherfunctions likeserialaddress,keyboardfunctions,realprobe
value visualization
REGULATION MENU - rEG
LS Minimum set point: (-100°C to SET; -148°F to SET) sets the minimum value for the
set point.
US Maximum set point: (SET to 150°C; SET to 302°F) set the maximum value for set
point.
HY Differential for normal regulation (compressor cut-in): (0.1 to 25.5°C; 1 to 45°F)
differentialfor set point. Compressor Cut INis Set Point + differential (HY). Compressor
Cut OUT is when the temperature reaches the set point.
odS Outputs delay activation after power on: (0 to 255min)this function is enabled at the
initialstartup of theinstrument and inhibits any output activation for the period set in the
parameter.
AC Compressor anti-short-cycle delay: (0 to 50min) minimum interval between the
compressor stopand thefollowing restart. It isalso used to retrycommunicationif serial
compressor control is used.
AC1 Second compressor anti-short-cycle delay: (0 to 255 sec) delay before activating
second compressor, depending on regulation mode selected by par. 2CC
2CC Activation mode for second compressor (valid if oAx=CP1 and oAy=CP2): (FUL;
HAF) FUL=second compressor activated in parallel with first one. HAF=second
compressor activated with step logic.
rCC Compressors rotation enabled: (n;Y) n= CP1 is always the first compressor
activated. Y= CP1 and CP2 activation is alternated
MCo Maximum time with compressor active: (0 to 255min) maximum time with ONOFF
compressor active. With MCo=0 this function is disabled.
rtr F(P1; P2) percentage for regulation: (0 to 100; 100=P1, 0=P2) it allows to set the
regulationaccording tothe percentage ofthefirstandsecond probe, asforthefollowing
formula (rtr*(P1-P2)/100 + P2).
CCt Maximum duration for Pull Down: (0.0 to 24h00min, res. 10min) allows setting the
length of the PULL DOWN cycle. Compressor stays on without interruption during CCt
time. This is useful, for instance, when the room is filled with new products.
CCS Differential for Pull Down (SET+CCS or SET+CCS+HES): (-12 to 12°C; -21to 21°F)
relative value to add to the regulation SETPOINT and to use during any PULL DOWN
cycle.
oHt Threshold for automatic activation of PULL DOWN in mormal mode: (0.0 to
25.5°C; 0 to 45°F) upper threshold for auto activation of a PULL DOWN
Con Compressor ON time with faulty probe: (0 to 255min) time during which the
compressor is active in case of faulty thermostat probe. With Con=0 compressor is
always OFF (not valid for VSC compressors).
CoF Compressor OFF time with faulty probe: (0 to 255min) time during which the
compressor is OFF in case of faulty thermostat probe. With CoF=0 compressor is
always active (not valid for VSC compressors).
PROBE MENU – Prb
PbC Temperature probe selection: ntC; PtC; Pt1000
ot Probe P1 calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset of
the thermostat probe. Terminals 1-2.
P2P Probe P2 presence: (n; Y) n= not present, thedefrost stops by time;
Y= present, thedefrost stops bytemperature. Terminals 2-3
oE Probe P2 calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset of
the second probe. Terminals 2-3.
P3P Probe P3 presence (P3): (n; Y) n= not present, Y= present. Terminals 4-5
o3 Probe P3 calibration (P3): (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset
of the third probe. Terminals 4-5
P4P Probe P4 presence: (n; Y) n = Not present; Y = present. Terminals 5-6
o4 Probe P4 calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible offset of
the fourth probe. Terminals 5-6
DISPLAY MENU - diS
CF Temperature measurement unit: (°C; °F) °C = Celsius; °F = Fahrenheit.
WARNING: When the measurement unit is changed the SET point and the values of
the parameters related to the temperature have to be checked and modified (if
necessary).
rES Resolution for °C: (in=1°C; dE=0.1°C) allows decimalpoint visualization.
rEd Remote display (P1; P2, P3, P4, SET, dtr) it selects which probe is displayed by the
controller. P1 = Thermostat probe; P2 = Second probe; P3 = Third probe; P4 = Fourth
probe, SET = set point; dtr = percentage of visualization.
dLY Temperature visualization delay: (0 to 20min00s; res. 10s) when the temperature
increases, the display is updated of 1°C or 1°F afterthis time.
dtr Visualization percentage=F(P1; P2): (0 to 99; 100=P1, 0=P2) if rEd=dtr it allows to
set the visualization according to the percentage of the first and second probe, as for
the following formula (dtr*(P1-P2)/100 + P2).
DEFROST MENU - dEF
EdF Defrost mode: (rtC; in) rtC = realtime clock control; in = interval of time control
tdF Defrost type: (EL; in) EL = electrical heating; in = hot gas.
dFP Probe selection for defrost control: (nP; P1; P2;P3; P4) nP = no probe;
P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 = Fourth Probe
dSP Probe selection for second defrost control: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 = Fourth Probe
dtE Defrost end temperature: (-55 to50°C; -67to 122°F)setsthetemperature measured
by the evaporator probe, which causes the end of defrost.
dtS Second defrost end temperature: (-55 to 50°C; -67 to 122°F) sets the temperature
measured by the second evaporator probe, which causes the end of defrost.
idF Interval between two consecutive defrost cycles: (0 to 120 hours) determines the
interval of time between two defrost cycles.
MdF Maximum duration for any defrost: (0 to 255min) when dtE=nP, (not evaporator
probe: timed defrost) it sets the defrost duration. When dtE different from nP (defrost
end based on temperature) it sets the maximum length for defrost.
MdS Maximum duration for second defrost: (0 to255min)when dtE=nP, (not evaporator
probe: timed defrost) it sets the defrost duration. When dtE different from nP (defrost
end based on temperature) it sets the maximum length for defrost.
dSd Start defrost delay: (0 to 99min) this is useful when different defrost start times are
necessary to avoid overloading the plant.
StC Compressor stop before activating any defrost: (0 to 30 min) is used stop the
compressor when a defrost is managed for inversion (hot-gas).
dFd Displaying during any defrost: (rt; it; SEt; dEF; Coo) rt = realtemperature;
it = temperature at defrost start; SEt = set point; dEF = “dEF” label; Coo = used after
any defrost, it shows the label “Coo” if the regulation temperature is above
SET+HY+HY1
dAd Delay for display temperature update after any defrost: (0 to 255min) sets the
maximum time between the end of defrost and the restarting of the real room
temperature display.
Fdt Draining time: (0 to 120min) time interval between reaching defrost termination
temperature and the restoring of the control’s normal operation. This time allows the
evaporator to eliminate water drops that might have formed due to defrost.
Hon Time with drain heater activated after drainig time Fdt: (0 to 255 min) valid only if
oAx=HEt.
dPo Defrost after power-on: (n; Y) n= afterthe idF time, Y= immediately.
dAF Defrost delay after Pull Down (used only if tdF=in): (0 to StC) used to delay the
activation of the defrost output.
od1 Automatic defrost: n=function disabled; Y=function enabled. At the beginning of any
energy saving mode a defrost willbe activated.
od2 Optimized defrost: no=function disabled; Y=function enabled
Syd Type of synchronized defrost: (nu; SYn; rnd, nSY)nu=not used; SYn=synchronized
defrost; rnd=random defrost function; nSY=desynchronized defrost
dt1 Optimized defrost termitation control: (0.1 to 1.0 °C) differential used from
optimized defrost algorithm for ending adefrost
ndE Number of devices for random defrost (SYd=rnd): (1 to 20) used to determinate
the number of appliances with random or desynchronized defrost function active
FAN MENU - FAn
FAP Probe selection for evaporator fan: (nP; P1; P2; P3; P4) nP = no probe;
P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 =Fourth probe.
FSt Evaporator fan stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature,
detected by evaporator probe, above which fans are always OFF.
HYF Differential for evaporator fan regulator: (0.1 to 25.5 °C; 1 to 45°F) differential used
for evaporator fan regulator
FnC Evaporator fan mode operation: (C-n; o-n; C-Y; o-Y) C-n = runs with the compressor,
OFF during defrost; o-n = continuous mode, OFF during defrost; C-Y = runs with the
compressor, ON during defrost; o-Y = continuous mode, ON duringdefrost.
Fnd Evaporator fan delay after any defrost: (0to 255min) interval between end of defrost
and evaporator fans start.
FCt Temperature differential for evaporator fan activation: (0 to 59°C; 0 to 90°F) (N.B.:
FCt=0 means function disabled) if the difference oftemperature between the evaporator
and the room probes is higher than FCt value, the fans will be switched on.
Fon Evaporator fan ON in normal mode (with compressor OFF): (0 to 15min) with
Fnc=C_n or C_Y, (fan activated in parallel with compressor) it sets the evaporator fan
ON cycling time when the compressor is off. With Fon=0 and FoF≠0 thefan are always
off, with Fon=0 and FoF=0 the fan are always off.
FoF Evaporator fan OFF in normal mode (with compressor OFF): (0 to 15min)
WithFnC=C_n or C_Y, (fan activated inparallel with compressor) it sets the evaporator
fan off cycling time when the compressor is off.
WithFon=0andFoF≠0 thefanarealwaysoff, withFon=0andFoF=0 thefanarealways
off.
LA1 Evaporator fan operating hours: (0 to 999) set the warning interval for maintenance.
Internal value is multiplied by 100.
rS1 Reset maintenance alarm for evaporator fan: change to Y and confirm with SET
button to reset condenser fan maintenance warning. LA2 interval will be reloaded.

1592026640 XWi70K GB r1.0 04.06.2020 XWi70K 5/8
FAC Probe selection for condenser fan: (nP; P1; P2; P3; P4) nP = no probe, regulator
disabled; P1 =thermostat probe; P2 = Second probe; P3 =Third probe; P4 =Fourth
probe.
St2 Set Point for condenser fan regulator: (-100 to 150 °C; -148 to 302°F) set point used
for condenser fan regulator
HY2 Differential for condenser fan regulator: (0.1 to 25.5°C; 1 to 45°F) differential used
for condenser fan regulator
FCC Condenser fan mode of operation: (C-n; o-n; C-Y; o-Y) C-n = runs with the
compressor, OFF during defrost; o-n = continuous mode, OFF during defrost; C-Y =
runs with the compressor, ON duringdefrost; o-Y= continuousmode, ON duringdefrost
FCo Condenserfanactivatedwhencompressoroff:(0to999sec)intervalwithcondenser
fan on after stopping compressor and when FCC=C-n or C-Y
LA2 Condenser fan operating hours: (0 to 999) set the warning interval for maintenance.
Internal value is multiplied by 100.
rS2 Reset maintenance alarm for condenser fan: change to Y and confirm with SET
button to reset condenser fan maintenance warning. LA2 interval will be reloaded.
AUXILIARY MENU – AUS
ACH Type of action for auxiliary regulator: (CL; Ht) CL = cooling; Ht= heating
SAA Set point for auxiliary regulator: (-100 to 150 °C; -148 to 302°F) set point used for
auxiliary regulator
SHY Differential for auxiliary regulator: (0.1 to 25.5°C; 1 to 45°F) differential used for
auxiliary regulator
ArP Probe selection for auxiliary regulator: (nP; P1; P2; P3; P4) nP = no probe, regulator
disabled; P1 =thermostat probe; P2 =Second probe; P3 =Third probe; P4=Fourth probe
Sdd Auxiliary regulator disabled during any defrost: (n; Y)n = enabled; Y =disabled
btA Time base for parameter Ato and AtF: (Min; SEC) Min=base time is in minutes;
SEC=base time is in seconds
Ato Interval with auxiliary output active: (0 to 255) valid if oAx=tiM, x=0,1,2,3,4 or if
xAo=tiM, x=1, 2
AtF Interval with auxiliary output not active: (0 to 255) valid if oAx=tiM, x=0,1,2,3,4 or if
xAo=tiM, x=1, 2
ALARM MENU - ALr
ALP Temperature alarm probe selection: (nP; P1; P2; P3; P4) nP = no probe, the
temperature alarms are disabled; P1 = Probe 1 (Thermostat probe); P2 = Probe 2; P3 =
Probe 3; P4 = Fourth probe.
ALC Temperature alarms configuration: (Ab; rE) Ab = absolute temperature, alarm
temperature is given by the ALL or ALU values. rE = temperature alarms are referred
to the set point. Temperature alarm is enabled when the temperature exceeds the
[SET+ALU] or[SET-ALL] values.
ALU Maximum temperature alarm:
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]
when this temperature is reached, the alarm is enabled after the ALd delaytime.
ALL Minimum temperature alarm:
If ALC=Ab: [-100°C to ALU; -148°F to ALU]
If ALC=rE: [0.0 to 50.0°C or 0 to 90°F]
when this temperature is reached, the alarm is enabled after the ALd delaytime.
AFH Differential for temperature alarm recovery: (0.1 to 25.5°C; 1 to 45°F) intervention
differentialfor recovery of temperature alarm.
ALd Temperature alarm delay: (0 to 255 min) time interval between the detection of an
alarm condition and alarm signaling.
dot Temperature alarm delay when door open: (0 to 255 min) delay before activating the
door open alarm
dAo Temperature alarm delay after power-on: (0.0 to 24h00min, res. 10min) time interval
betweenthe detection of the temperature alarm condition after instrument power onand
temperature alarm signaling. It also delays thedisplay indication of compressor warning
alarms (if serialcompressor control is used). NOTE: Modbus status are always updated
with running alarm or warnings, also during dAo delay.
AP2 Second temperature alarm probe selection: (nP; P1; P2; P3; P4)
nP = no probe; P1 = thermostat probe; P2 = second probe; P3 = Third probe; P4 =
Fourth probe.
AL2 Second low temperature alarm: (-100to 150°C; -148 to 302°F) when thistemperature
is reached the LA2 alarm is signaled, possibly after the Ad2 delay.
Au2 Second high temperature alarm: (-100 to 150°C; -148 to 302°F) when this
temperature is reached the HA2 alarm is signaled, possibly after the Ad2 delay.
AH2 Differential for second temperature alarm recovery: 0.1 to 25.5°C; 1 to 45°F.
Ad2 Second temperature alarm delay: (0 to 255 min) time interval between the detection
of the condenser alarm condition and alarm signaling.
dA2 Second temperature alarm activation delay after power-on: 0.0 to 24h00min, res.
10min.
bLL Compressor off due to second low temperature alarm: (n; Y) n=compressor keeps
onworking; Y=compressorisswitchedoff tillthealarmispresent,inanycaseregulation
restarts after AC time at minimum.
AC2 Compressor off due to second high temperature alarm: (n; Y)n=compressor keeps
onworking; Y=compressorisswitchedoff tillthealarmispresent,inanycaseregulation
restarts after AC time at minimum.
SAF Differential for anti-freezing control: (0.0 to 25.5°C; 0 to 45°F) lower threshold used
to avoid freezing conditions. If T<SET-SAF, then the compressor will be stopped. If
SAF=0 this function is disabled.
tbA Alarm relay deactivation (with oAx =ALr): (n; Y) n= silencing disabled: alarm relay
stays on tillalarm condition lasts. Y= silencing enabled: alarm relay is switched OFF by
pressing a key during an alarm.
bUM Buzzer muting: (n; Y) n= buzzer cannot be stopped; Y= buzzer activation due to any
alarm can be stopped
OUTPUT CONFIGURATIONS – oUt
oA1
(20-21) Relay output oA1 configuration, terminals 16-17: (nu; onF; dEF; Fan; Alr; LiG; Au1; Au2; db; CP1; CP2;dF2; HES; HEt; inV;tiM; Cnd) nu=not used; onF =always
on with instrument on; dEF=defrost;Fan=Fan; Alr=alarm; LiG=light; Au1=auxiliary
output; Au2=auxiliary output 2; db=neutral zone; CP1=ONOFF compressor;
CP2=second ONOFF compressor; dF2=second defrost; HES=energy saving;
HEt=heater output control; inV=inverter output; tiM=timed mode activation;
Cnd=condenser fan
oA2
(16-17) Relay output oA2 configuration, terminals 20-21: (nu; onF; dEF; Fan; Alr; LiG; Au1; Au2; db; CP1; CP2;dF2; HES; HEt; inV;tiM; Cnd) nu=not used; onF =always
on with instrument on; dEF=defrost;Fan=Fan; Alr=alarm; LiG=light; Au1=auxiliary
output; Au2=auxiliary output 2; db=neutral zone; CP1=ONOFF compressor;
CP2=second ONOFF compressor; dF2=second defrost; HES=energy saving;
HEt=heater output control; inV=inverter output; tiM=timed mode activation;
Cnd=condenser fan
oA3
(18-19) Relay output oA3 configuration, terminals 22-23: (nu; onF; dEF; Fan; Alr; LiG; Au1; Au2; db; CP1; CP2;dF2; HES; HEt; inV;tiM; Cnd) nu=not used; onF =always
on with instrument on; dEF=defrost;Fan=Fan; Alr=alarm; LiG=light; Au1=auxiliary
output; Au2=auxiliary output 2; db=neutral zone; CP1=ONOFF compressor;
CP2=second ONOFF compressor; dF2=second defrost; HES=energy saving;
HEt=heater output control; inV=inverter output; tiM=timed mode activation;
Cnd=condenser fan
oA4
(22-23) Relay output oA4 configuration, terminals 22-23: (nu; onF; dEF; Fan; Alr; LiG; Au1; Au2; db; CP1; CP2;dF2; HES; HEt; inV;tiM; Cnd) nu=not used; onF =always
on with instrument on; dEF=defrost;Fan=Fan; Alr=alarm; LiG=light; Au1=auxiliary
output; Au2=auxiliary output 2; db=neutral zone; CP1=ONOFF compressor;
CP2=second ONOFF compressor; dF2=second defrost; HES=energy saving;
HEt=heater output control; inV=inverter output; tiM=timed mode activation;
Cnd=condenser fan
oA5
(29-30-
31)
Relay output oA5 configuration, terminals 29-30-31: (nu; onF; dEF; Fan; Alr;
LiG; Au1; Au2; db; CP1; CP2; dF2; HES; HEt; inV; tiM; Cnd) nu=not used; onF =
always on with instrument on; dEF=defrost; Fan=Fan; Alr=alarm; LiG=light;
Au1=auxiliary output; Au2=auxiliary output 2; db=neutral zone; CP1=ONOFF
compressor; CP2=second ONOFF compressor; dF2=seconddefrost; HES=energy
saving; HEt=heater output control; inV=inverter output; tiM=timed mode activation;
Cnd=condenser fan
AoP Alarm relay polarity: (CL; oP) it set if the alarm relay is open or closed when an
alarm occurs. CL = terminals closed during an alarm; oP = terminals open during
an alarm.
DIGITAL INPUT MENU - inP
i1P Digital input 1 polarity: (oP; CL) oP = the digital input is activated by opening the
contact; CL = the digitalinput is activated by closing the contact.
i1F Digital input 1 configuration: (EAL; bAL; PAL; dor; dEF; AUS; Htr; FAn; ES; HdF; LHt;
onF; Lnt) EAL = external alarm: “EA” message is displayed; bAL = serious alarm “CA”
message is displayed; PAL = pressure switch alarm, “CA” message is displayed; dor =
door switch function; dEF = activation of a defrost cycle; AUS =auxiliaryrelayactivation
with oAx=AUS; Htr = type of inverting action (cooling or heating); FAn = evaporator fan
activation; ES = energysaving; HdF = Holiday defrost (enable only with RTC); onF = to
switch the controller off; LHt = to activate the light; Lnt = parameter map change.
did Digital input 1 alarm delay: (0 to 255 min) delay between the detection of the external
alarm condition and its signalling.
When i1F= PAL, it is the interval of time to calculate the number of pressure switch
activation.
i2P Digital input 2 polarity: (oP; CL) oP = the digital input is activated by opening the
contact; CL = the digitalinput is activated by closing the contact.
i2F Digital input 2 configuration: (EAL; bAL; PAL; dor; dEF; AUS; Htr; FAn; ES; HdF; LHt;
onF; Lnt) EAL = external alarm: “EA” message is displayed; bAL = serious alarm “CA”
message is displayed; PAL = pressure switch alarm, “CA” message is displayed; dor =
door switch function; dEF = activation of a defrost cycle; AUS =auxiliaryrelayactivation
with oAx=AUS; Htr = type of inverting action (cooling or heating); FAn = evaporator fan
activation; ES = energysaving; HdF = Holiday defrost (enable only with RTC); onF = to
switch the controller off; LHt = to activate the light; Lnt = parameter map change.
d2d Digital input 2 alarm delay: (0 to 255 min) delay between the detection of the external
alarm condition and its signaling.
When i2F= PAL, it is the interval of time to calculate the number of pressure switch
activation.
nPS Number of pressure alarm events before stopping the regulation (Lock alarm): (0
to 15) Number of activation, during the did or d2d interval, before signalling an alarm
event (i1F, i2F=PAL).
If the nPS activation during did ord2d time is reached, switch off and on the instrument
to restart normalregulation.
odC Compressor and fan status after door opening: (no; FAn; CPr;F_C;) no = normal;
FAn = normal; CPr = compressor OFF, F_C = compressor OFF.
rrd Regulation restart after open door alarm: (n;Y)n=outputs followthe odC parameter.
Y= outputs restart with a door open alarm.
ENERGY SAVING MENU – ES
HES Differential for energy saving mode: (-30 to 30°C; -54 to 54°F) it sets the increasing
value of the set point [SET+HES] during the Energy Saving cycle.
ESt Time-out for energy saving mode: (0 to 255 hours) maximum duration for energy
saving mode. If ESt=0 then this function is disabled.
LdE Energy saving mode controls the lights: (n; Y) lights off when energy saving mode is
active
LHt Time-out for light output: (0 to 255 min) the light output will be forced OFF after this
period. LHt=0 means function disabled.
OTHER
Adr Serial address: (1 to 247) identifies the instrument address when connected to a
Modbus compatible monitoring system.
bAU Baudrate for serial communication: 9.6 = 9600baud; 19.2 = 19200baud
onC ONOFF button configuration: (nU; oFF; ES; SEr) nU = disabled; oFF = enabled; ES
= energy saving mode; SEr = do not use it
dP1 Probe P1 value visualization (read only)

1592026640 XWi70K GB r1.0 04.06.2020 XWi70K 6/8
dP2 Probe P2 value visualization (read only)
dP3 Probe P3 value visualization (read only)
dP4 Probe P4 value visualization (read only)
SPd Instantaneous compressor speed (in percentage): read only
rSE Real regulation set point: it shows the set point used during the energy saving cycle
or during the continuous cycle.
rEL Firmware release
Ptb Parameter map code
14 DIGITAL INPUT
The free voltage digital inputs are programmable in different configurations bythe i1F or i2F
parameters.
14.1 DOOR SWITCH INPUT (DOR)
It signals the door status and the corresponding relay output status through the odC parameter: no =
normal (any change); Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter did, the door alarm is enabled, the
display shows the message “dA” and theregulation restarts is rtr = yES. The alarm stops as soon as
the external digital input is disabled again. With the door open, the high and low temperature alarms are
disabled.
14.2 GENERIC ALARM (EAL)
As soon as the digital input is activated the unit will wait for did time delay before signalling the “EAL”
alarm message. The outputs status doesn’t change. The alarm stops just after the digital input is de-
activated.
14.3 SERIOUS ALARM MODE (BAL)
When the digital input is activated, the unit will wait for did delay before signalling the “CA” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
14.4 PRESSURE SWITCH (PAL)
If duringthe interval timeset bydidparameter, the pressure switch has reachedthe number ofactivation
of the nPS parameter, the “CA” pressure alarm message will be displayed. The compressor and the
regulation are stopped. When the digital input is ON the compressor is always OFF. If the nPS
activation in the did time is reached, switch off and on the instrument to restart normal
regulation.
14.5 DEFROST CONTROL (DEF)
It starts a defrost if there are the right conditions. After the defrost is finished, the normalregulation will
restart only if the digital input is disabled otherwise the instrument will wait until the MdF safety time is
expired.
14.6 KIND OF ACTION: HEATING OR COOLING (HTR)
This function allows inverting the regulation of the controller: from cooling to heating and vice versa.
14.7 ENERGY SAVING (ES)
The Energy Saving function allows to change the set point value as the result of the SET+HES
(parameter) sum. This function is enabled until the digitalinput is activated.
14.8 EVAPORATOR FAN CONTROL (FAN)
Outputs set as evaporator fan (FAn) will be activated or deactivated following the digital input polarity.
14.9 HOLIDAY MODE (HDF)
Holiday mode activation.
14.10 REMOTE LIGHT CONTROL (LHT)
To manage the light activation from remote.
14.11 REMOTE ON OFF (ONF)
To issue a remote ON/OFF command.
14.12 PARAMETER MAP CHANGE (LNT)
To change the used parameter map from nt (normal temperature) to Lt (low temperature) and vice-
versa.
14.13 DIGITAL INPUTS POLARITY
The digital input polarity depends on the i1P or i2P parameters:
i1P or i2P=CL: the input is activated by closing the contact.
i1P or i2P=OP: the input is activated by opening the contact
15 HOW TO INSTALL AND MOUNT
T620T/H or T820T/H keyboards shall be mounted on vertical panel, in a 150x31 mm hole, and fixed
using the special bracket supplied.
VH620H keyboard shallbe mounted on vertical panel, in a 72x56 mm hole, and fixed using two screws
3x2 mm. To obtain an IP65 protection grade use the front panelrubber gasket (mod. RGW-V).
CH620 keyboard shall be mounted on vertical panel, in a 29x71 mm hole, and fixed using the special
bracket supplied.
The controller XWi70K shallbe mounted in a din railand in a horizontalposition or with the relay output
on the bottom side (IEC/60730).
It must beconnected to the keyboard by using a 2-wire cable (1mm). The temperature range allowed
for correct operationis 0 to 60°C. Avoid places subject to strong vibrations, corrosive gases, excessive
dirt or humidity. The samerecommendations apply toprobes. Let the air free to circulate by the aeration
holes.
15.1 XWi70K – 8 DIN CASE - DIMENSIONS
16 ELECTRICAL CONNECTIONS
XWi70K is provided with screw terminalblocks to connect cables with a cross section up to 2.5 mm2 for
the RS485 (optional) and the keyboard. To connect the other inputs, power supply and relays, XWi70K
is provided with Plug-in connections (6.3mm). Heat-resistant cables must be used. Before connecting
cables make sure the power supply complies with the instrument’s requirements. Separate the probe
cables from the power supply cables, from the outputs and the power connections. Do not exceed the
maximum current allowed, in case of heavier loads use a suitable external relay.
NOTE:
-the maximum current allowed for the common line of the relays is 14A (IEC/60730)
-the maximum current allowed for insulated relay (oA5) is 3A (IEC/60730)
16.1 PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average
room temperature. Place the defrost termination probe among the evaporator fins in the coldest place,
where most ice is formed, far from heaters or from the warmest place during defrost, to prevent
premature defrost termination.
17 TTL/RS485 SERIAL LINE
The TTL connector allows, bymeans of the externalmodule TTL/RS485 (XJ485CX), to connect the unit
to a network line ModBUS-RTU compatible as the Dixell monitoring system. The same TTL connector
is used to upload and download the parameter list of the “HOT-KEY”.
18 HOW TO USE OF THE “HOT KEY”
NOTE: the XWi controllers need a 64KB HOT KEY. Standard Hot Key is not supported.
18.1 PROGRAM A HOT-KEY FROM AN INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “HOT-KEY” and push UP button; the “uPL”message
appears followed a by a flashing “End” label.
3. Push SET button and the “End” willstop flashing.
4. Turn OFF the instrument, remove the “HOT-KEY” and then turn it ON again.
NOTE: the “Err” message appears in case of a failed programming operation. In this case push again
button if you want to restart the upload again or remove the “HOT-KEY” to abort the operation.
18.2 HOT TO CHANGE PARAMETER MAP BY USING AN HOT-KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a pre-programmed “HOT-KEY”into the 5-PIN port and then turn the Controller ON.
3. The parameter list of the “HOT-KEY” will be automatically downloaded into the Controller
memory. The “doL”message will blink followed a by a flashing “End” label.
4. After 10 seconds the instrument willrestart working with the new parameters.
5. Remove the “HOT-KEY”.
NOTE: the message “Err”is displayed for failed programming. In this case turn the unit off and then on
if you want to restart the download again or remove the “HOT-KEY” to abort the operation.
19 ALARM SIGNALS
Message Cause Outputs
P1 Thermostat probefailure Alarm output ON; Compressor output according to
parameters Con and CoF
P2 Second probe failure Alarm output ON; Other outputs unchanged
P3 Third probe failure Alarm output ON; Other outputs unchanged
P4 Fourth probe failure Alarm output ON; Other outputs unchanged
HA Maximum temperature alarm Alarm output ON; Other outputs unchanged
LA Minimum temperature alarm Alarm output ON; Other outputs unchanged
HA2 Condenser high temperature It depends on the AC2 parameter
LA2 Condenser low temperature It depends on the bLL parameter
dA Door open Compressor and fans restarts
EA Externalalarm Output unchanged
CA Serious external alarm (i1F=bAL) All outputs OFF
CA Pressure switch alarm (i1F=PAL) All outputs OFF
EE Data or memoryfailure Alarm output ON; Other outputs unchanged
noL No communication between base
and keyboard Unchanged
The alarm message is displayed untilthe alarm condition is recovery.
All the alarm messages are showed alternating with the room temperature except for the “P1” which is
flashing.
To reset the “EE”alarm and restart the normalfunctioning press anykey, the “rSt”messageis displayed
for about 3 sec.

1592026640 XWi70K GB r1.0 04.06.2020 XWi70K 7/8
19.1 BUZZER MUTING
Once the alarm signal is detected the buzzer can be silenced by pressing any key. Buzzer is mounted
in the keyboard and it is an option.
19.2 “EE” ALARM
The Dixell instruments are provided with an internal check for thedata integrity. The “EE” alarm flashes
when a failure in the memory data occurs. In such cases the alarm output is enabled.
19.3 ALARM RECOVERY
Probe alarms: “P1” (probe1 faulty), “P2”, “P3” and “P4”; they automatically stop 10 sec after the probe
restarts normaloperation. Check connections before replacing the probe.
Temperaturealarms “HA”, “LA” “HA2” and “LA2” automaticallystop as soon asthe temperature returns
to normal values.
Alarms “EA” and “CA” (with i1F=bAL)recovers as soonas the digital input is disabled.
Alarm “CA” (with i1F=PAL) recovers only by switching off and on the instrument.
20 TECHNICAL DATA
20.1 KEYBOARDS
Housing: self-extinguishing ABS
Supported models: CH620, V620H, T620x, T820x
Protection: IP20; Frontal protection: IP65 with frontalgasket
Connections: Screw terminal block 2.5 mm2
Power supply: from XWi70K power module
Display: 3-digit red, white or blue LED
Optional: buzzer
20.2 POWER MODULE XWI70K
Case: 8-DIN, 140x176x148
Connections: Screw terminal block 2.5 mm2heat-resistant wiring, 6.3mm Spade or Plug-in type
Power supply: 230Vac or 110Vac 10%
Power absorption: 10VA max
Temperature probe inputs: 4 NTC, PTC or PT1000 probes
Digital inputs: 2 free voltage contacts
Relay outputs (absolute ratings):
oA1: relay SPST 20(8) A, 250Vac
oA2: relay SPST 16(5) A, 250Vac
oA3: relay SPST 8(3) A, 250Vac
oA4: relay SPST 20(8) A, 250Vac
oA5: relay SPDT 7(2) A, 250Vac
Maximum current ratings on loads 14A (IEC/60730)
Maximum current ratings on insulated relay (oA5) 3A (IEC/60730)
Serial output:
TTL standard available on 5-pin port (JST connector)
Communication protocol: Modbus - RTU
Data storing: on the non-volatile memory (EEPROM)
Kind of action: 1B; Pollution degree: normal
Software class: A
Operating temperature: 0 to 50°C (32 to 140°F) (IEC/60730)
Storage temperature: -25 to 60°C (-13 to 140°F)
Relative humidity: 20 to 85% (no condensing)
Measuring and regulation range:
NTC probe: -40 to 110°C (-58 to 230°F)
PTC probe: -50 to 150°C (-58 to 302°F)
PT1000 probe: -100 to 150°C (-148 to 302°F)
Resolution: 0.1°C or 1°C or 1°F (selectable)
Accuracy (ambient temp. 25°C): ±0.5°C ±1 digit
21 WIRING DIAGRAMS
22 DEFAULT PARAMETER MAPS
Label Description Value Level
Set Set Point (compressorcut-out) 2.0
LS Minimum Set Point -50.0 Pr1
US Maximum Set Point 50.0 Pr1
Hy Differential for normal regulation (compressor cut-in) 2.0 Pr2
odS Outputs delay activation after power on 1 Pr2
AC Compressor anti-short-cycle delay 1 Pr1
AC1 Second compressor anti-short-cycle delay 10 Pr1
2CC Activation mode for second compressor (valid if oAx=CP1 and
oAy=CP2) FUL Pr1
rCC Compressors rotation enabled No Pr1
Rtr F(P1; P2) percentage for regulation (100=P1; 0=P2) 100 Pr2
CCt Maximum duration for Pull Down 00:00 Pr2
CCS Differential for PullDown (SET+CCS or SET+HES+CCS) 0.0 Pr2
oHt Threshold for automatic activation of Pull Down in normal mode
(SET+HY+oHt) 0.0 Pr2
Con Compressor ON time with faulty probe 5 Pr2
CoF Compressor OFF time with faulty probe 10 Pr2
PbC Temperature probe selection ntC Pr2
Ot Probe P1 calibration 0.0 Pr2
P2P Probe P2 presence Yes Pr2
oE Probe P2 calibration 0.0 Pr2
P3P Probe P3 presence No Pr2
o3 Probe P3 calibration 0.0 Pr2
P4P Probe P4 presence No Pr2
o4 Probe P4 calibration 0.0 Pr2
Hy1 Differential for proportional regulation 1.0 Pr1
CF Temperature measurement unit: Celsius, Fahrenheit °C Pr2
rES Resolution for °C: decimal, integer dE Pr2
rEd Remote display: probe visualized P1 Pr2
dLy Temperature visualization delay 00:00 Pr2
Dtr Visualization percentage=F(P1; P2) (ex: dtr=1 means
VALUE=0.01*P1+0.99*P2) 50 Pr2
tdF Defrost type: electrical heating, hot gas In Pr1
dFP Probe selection for defrost control P2 Pr2
dtE Defrost end temperature 6.0 Pr1
idF Interval between two consecutives defrost cycles 12 Pr1
MdF Maximum length for any defrost 30 Pr1
dSd Start defrost delay 0 Pr2
StC Compressor stop before activating hot-gas defrost 0 Pr2
dFd Displaying during anydefrost dEF Pr2
dAd Delay for display temperature update after any defrost 20 Pr2
Fdt Draining time 0 Pr2
dAF Defrost delay after Pull Down 0 Pr2
od1 Automatic defrost (at the beginning of anyenergy saving mode) no Pr2
FAP Probe selection for evaporator fan P1 Pr1
FSt Evaporator fan stop temperature 30.0 Pr1
HyF Differential for evaporator fan regulator 10.0 Pr1
FnC Evaporator fan mode operation O_Y Pr1
Fnd Evaporator fan delay after defrost 2 Pr1
FCt Temperature differential for evaporator fan activation
(0=function disabled) 0 Pr1
Fon Evaporator fan ON in normal mode (with compressor OFF) 0 Pr2
FoF Evaporator fan OFF in normalmode (with compressor OFF) 0 Pr2
LA1 Operating hours (x100) for condenser fans 0 Pr2
rS1 Reset maintenance alarm No Pr2
FAC Probe selection for condenser fan nP Pr2
St2 Regulation Set Point for condenser fan 15 Pr2
Hy2 Differential for condenser fan regulator 20 Pr2
FCC Condenser fan mode operation C_n Pr2
FCo Condenser fan on after switching off compressor 0 Pr2
LA2 Operating hours (x100) for condenser fans 0 Pr1
rS2 Reset maintenance alarm no Pr2
ACH Type of action for auxiliary regulator CL Pr2
SAA Set point for auxiliary regulator 0.0 Pr2
SHy Differential for auxiliary regulator 2.0 Pr2
ArP Probe selection for auxiliary regulator nP Pr2
Sdd Auxiliary regulator disabled during anydefrost No Pr2
btA Base time for parameter Ato and AtF Min Pr2
Ato Interval of time with auxiliary output active (valid if oAx=tiM,
x=0,1,2,3,4 or if xAo=tiM, x=1, 2) 5 Pr2
AtF Intervalof time with auxiliary output not active (valid if oAx=tiM,
x=0,1,2,3,4 or if xAo=tiM, x=1, 2) 5 Pr2
ALP Temperature alarm probe selection P1 Pr2
ALC Temperature alarms configuration: relative, absolute rE Pr2

1592026640 XWi70K GB r1.0 04.06.2020 XWi70K 8/8
ALU Maximum temperature alarm 5.0 Pr2
ALL Minimum temperature alarm 5.0 Pr2
AFH Differential for temperature alarm recovery 1.0 Pr2
ALd Temperature alarm delay 15 Pr2
dot Temperature alarm delay when door open 15 Pr2
dAo Temperature alarm delay after power-on 02:00 Pr2
AP2 Second temperature alarm probe selection P3 Pr1
AL2 Second low temperature alarm (absolute value) 0.0 Pr2
AU2 Second high temperature alarm (absolute value) 55.0 Pr2
AH2 Differential for second temperature alarm recovery 20.0 Pr2
Ad2 Second temperature alarm delay 5 Pr2
dA2 Second temperature alarm activation delay after power-on 00:00 Pr2
bLL Compressor off due to second low temperature alarm no Pr2
AC2 Compressor off due to second high temperature alarm yes Pr2
tbA Alarm relay deactivation Yes Pr2
bUM Buzzer muting Yes Pr2
oA1 Relay output oA1 (terminals 20-21) CP1 Pr2
oA2 Relay output oA2 (terminals 16-17) dEF Pr2
oA5 Relay output oA3 (terminals 18-19) Fan Pr2
oA4 Relay output oA4 (terminals 22-23) Cnd Pr2
oA5 Relay output oA5 (terminals 29-30-31) onF Pr2
AoP Alarm relay polarity CL Pr2
i1P Digital input 1 polarity CL Pr1
i1F Digital input 1 configuration Dor Pr1
did Digital inputs 1 alarm delay 5 Pr1
i2P Digital input 2 polarity CL Pr2
i2F Digital input 2 configuration EAL Pr2
d2d Digital inputs 2 alarm delay 0 Pr2
nPS Number of pressure alarm events before stopping the
regulation (Lock alarm) 15 Pr2
odC Compressor and fan status after door opening Fan Pr2
rrd Regulation restart after open door alarm Yes Pr2
HES Differential for energy saving mode 0 Pr2
LdE Energy saving mode controls the lights (lights off when energy
saving goes active) No Pr2
Adr Serial address 1 Pr2
bAU Baudrate selection for serial port (TTL on Hotkey) 9.6 Pr2
onC ONOFF button configuration oFF Pr2
dP1 Probe P1 value visualization - Pr1
dP2 Probe P2 value visualization - Pr1
dP3 Probe P3 value visualization - Pr1
dP4 Probe P4 value visualization - Pr1
rSE Real regulation Set Point - Pr1
rEL Firmware release - Pr1
Ptb Parameter map code - Pr1