Emerson Dixell XR40CX Wiring diagram

1592020040 XR40CX GB m&M r1.1 22.06.2012 XR40CX 1/4
Digital controller with defrost management
XR40CX
CONTENTS
1. GENERAL WARNING__________________________________________________________1
2. GENERAL DESCRIPTION______________________________________________________1
3. CONTROLLING LOADS________________________________________________________1
4. FRONT PANEL COMMANDS ___________________________________________________1
5. MAX & MIN TEMPERATURE MEMORIZATION_____________________________________1
6. MAIN FUNCTIONS____________________________________________________________1
7. PARAMETERS _______________________________________________________________2
8. DIGITAL INPUT (ENABLED WITH P3P = N)________________________________________3
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS _________________________________3
10. X-REP OUTPUT – OPTIONAL___________________________________________________3
11. INSTALLATION AND MOUNTING________________________________________________3
12. ELECTRICAL CONNECTIONS __________________________________________________3
13. HOW TO USE THE HOT KEY___________________________________________________3
14. ALARM SIGNALS_____________________________________________________________3
15. TECHNICAL DATA____________________________________________________________3
16. CONNECTIONS ______________________________________________________________3
17. DEFAULT SETTING VALUES ___________________________________________________4
1. GENERAL 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 shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
Check the application limits before proceeding.
Dixell Srl 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 all electricalconnectionsbefore anykind 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 “DixellS.r.l.”
(see address) with a detailed description of the fault.
Consider the maximum current which can be applied to each relay(see TechnicalData).
Ensure that the wires for probes, loads and the power supply are separated and far enough
from each other, without crossing orintertwining.
In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallelwith inductive loads could be useful.
2. GENERAL DESCRIPTION
Model XR40CX, format 32 x 74 mm, is microprocessor based controller, suitable for applications on
medium or low temperature refrigerating units. It has 2 relay outputs to control compressor and
defrost, which can be either electrical or reverse cycle (hot gas). It is also provided with three NTC or
PTC probe inputs, the first one for temperature control, the second one, to be located onto the
evaporator, to control the defrost termination temperature, the third one, optional, to connect to the
HOT KEY terminals to signal the condenser temperature alarm or to display a temperature. The
digitalinput can operate as fourth temperature probe.
The HOT KEY output allows to connect the unit, by means of the external module XJ485-CX, to a
network line ModBUS-RTU compatible such as the dIXEL monitoring units of X-WEB family. It
allows to program the controller by means the HOT KEY programming keyboard.
The instrument is fully configurable through special parameters that can be easily programmed
through the keyboard.
3. CONTROLLING LOADS
3.1 COMPRESSOR
The regulation is performed according to
the temperature measured by the
thermostat 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.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn”and “COF”.
3.2 DEFROST
Two defrost modes are available through the “tdF”parameter: defrost through electricalheater (tdF =
EL) and hot gas defrost (tdF = in). Other parameters are used to control the interval between
defrost cycles (IdF), its maximum length (MdF) and two defrost 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 FSt parameter. With FSt =0 the
dripping time is disabled.
4. FRONT PANEL COMMANDS
: To display target set point; in programming mode it selects a parameter or confirm an
operation.
(DEF) To start a manualdefrost
(UP): To see the max. stored temperature; in programming mode it browses the parameter
codes or increases the displayed value.
(DOWN) To see the min stored temperature; in programming mode it browses the parameter
codes or decreases the displayed value.
To switch the instrument off, if onF = oFF.
Not enabled.
KEY COMBINATIONS:
+  To lock & unlock the keyboard.
+To enter in programming mode.
+To return to the room temperature display.
4.1 USE OF LEDS
Each LED function is described in the following table.
LED MODE FUNCTION
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enbled
°C/°F ON Measurement unit
°C/°F Flashing Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1. Press and release the nkey.
2. The “Lo”message willbe displayed followed by the minimum temperature recorded.
3. By pressing the nkeyagain or by waiting 5s the normaldisplay will be restored.
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the okey.
2. The “Hi”message willbe displayed followed by the maximum temperature recorded.
3. By pressing the okeyagain or by waiting 5s the normaldisplay will be restored.
5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1. Hold press the SET key for more than 3s, while the max. or min temperature is displayed. (rSt
message willbe displayed)
2. To confirm the operation the “rSt” message starts blinking and the normal temperature will be
displayed.
6. MAIN FUNCTIONS
6.1 HOW TO SEE THE SETPOINT
1. Push and immediately release the SET key: the display will show the Set
point value;
2. Push and immediatelyrelease the SET key or wait for 5 seconds to
displaythe probe value again.
6.2 HOW TO CHANGE THE SETPOINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point willbe displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the o or narrows within 10s.
4. To memorise the new set point value push the SET keyagain or wait 10s.
6.3 HOW TO START A MANUAL DEFROST
Push the DEF key for more than 2 seconds and a manual defrost will start.
6.4 HOW TO CHANGE A PARAMETER VALUE
To change the parameter’s value operate as follows:

1592020040 XR40CX GB m&M r1.1 22.06.2012 XR40CX 2/4
1. Enter the Programming mode by pressing the Set + nkeys for 3s (the “°C” or “°F” LED starts
blinking).
2. Select the required parameter. Press the “SET” key to display its value
3. Use “UP” or “DOWN” to change its value.
4. Press “SET”to store the new value and move to the following parameter.
To exit: Press SET + UP or wait 15swithout pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.
6.5 THE HIDDEN MENU
The hidden menu Includes all the parameters of the instrument.
6.5.1 HOW TO ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the Set + nkeys for 3s (the “°C” or “°F” LED starts
blinking).
2. Released the keys, then push again the Set+nkeys for more than 7s. The Pr2 label will be
displayed immediatelyfollowed from the HY parameter.
NOW YOU ARE IN THE HIDDEN MENU.
3. Select the required parameter.
4. Press the “SET” key to displayits value
5. Use o or nto change its value.
6. Press “SET”to store the new value and move to the following parameter.
To exit: Press SET + o or wait 15swithout pressing a key.
NOTE1: if none parameter is present in Pr1, after 3s the “noP” message is displayed. Keep the keys
pushed tillthe Pr2 message is displayed.
NOTE2: the set value is stored even when the procedure is exited by waiting the time-out to expire.
6.5.2 HOW TO MOVE A PARAMETER FROM THE HIDDEN MENU TO THE
FIRST LEVEL AND VICEVERSA.
Each parameter present in the HIDDEN MENU can be removed or put into “THE FIRST LEVEL” (user
level) by pressing “SET + n”.
In HIDDEN MENU when a parameter is present in First Levelthe decimalpoint is on.
6.6 HOW TO LOCK THE KEYBOARD
1. Keep pressed for more than 3 s the UP + DOWN keys.
2. The “POF” message will be displayed and the keyboard will be locked. At this point it will be
possible only to see the set point or the MAX o Min temperature stored
3. If a key is pressed more than 3s the “POF” message willbe displayed.
6.7 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the o and nkeys, till the “Pon” message will be
displayed.
6.8 THE CONTINUOUS CYCLE
When defrost is not in progress, it can be activated by holding the “o” key pressed for about 3
seconds. The compressor operates to maintain the “ccS” set point for the time set through the “CCt”
parameter. The cycle can be terminated before the end of the set time using the same activationkey
“o”for 3 seconds.
6.9 THE ON/OFF FUNCTION
With “onF = oFF”, pushing the ON/OFF key, the instrument is switched off. The “OFF”
message is displayed. In this configuration, the regulation is disabled.
To switch the instrument on, push again the ON/OFF key.
WARNING: Loads connected to the normally closed contacts of the relays are always
supplied and under voltage, even if the instrument is in stand by mode.
7. PARAMETERS
REGULATION
Hy Differential: (0,1 ÷ 25,5°C / 1÷255°F) Intervention differentialfor set point. Compressor Cut IN is
Set Point + differential (Hy). Compressor Cut OUT is when the temperature reaches the set
point.
LS Minimum set point: (- 50°C÷SET/-58°F÷SET): Sets the minimum value for the set point.
US Maximum set point: (SET÷110°C/ SET÷230°F). Set the maximum valuefor set point.
Ot Thermostat probe calibration: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of
the thermostat probe.
P2P Evaporator probe presence: n= not present: the defrost stopsbytime; y= present: the defrost
stops by temperature.
OE Evaporator probe calibration: (-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the evaporator probe.
P3P Third probe presence (P3): n= not present:, the terminal operates as digital input.; y=
present:, the terminaloperates as third probe.
O3 Third probe calibration (P3): (-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the third probe.
P4P Fourth probe presence: (n = Not present; y= present).
o4 Fourth probe calibration: (-12.012.0°C) allows to adjust possible offset of the fourth probe.
OdS Outputs activation delay at start up: (0÷255min) This function is enabled at the initial start up
of the instrument and inhibits anyoutput activation for the period of time set in the parameter.
AC Anti-short cycle delay: (0÷50 min) minimum interval between the compressor stop and the
following restart.
rtr Percentage of the second and first probe for regulation (0÷100; 100 = P1, 0 = P2 ): it
allows to set the regulation according to the percentage of the first and second probe, as for the
following formula (rtr(P1-P2)/100 + P2).
CCt Compressor ON time during continuous cycle: (0.0÷24.0h; res. 10min) Allows to set the
length of the continuous cycle: compressor stays on without interruption for the CCt time. Can be
used, for instance, when the room is filled with new products.
CCS Set point for continuous cycle: (-50÷150°C) it sets the set point used during the continuous
cycle.
COn Compressor ON time with faulty probe: (0÷255 min) time during which the compressor is
active in case of faultythermostat probe. With COn=0 compressor is always OFF.
COF Compressor OFF time with faulty probe: (0÷255 min) time during which the compressor is
OFF in case of faulty thermostat probe. With COF=0 compressor is always active.
DISPLAY
CF Temperature measurement unit: °C=Celsius; °F=Fahrenheit. WARNING: When the
measurement unit is changed the SET point and the values of the parameters Hy, LS, US, Ot,
ALU and ALL have to be checked and modified if necessary).
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimalpoint display.
Lod Instrument display: (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by the
instrument: P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe(only for model
with this option enabled); P4 = Fourth probe, SET = set point; dtr = percentage of visualization.
rEd X- REP display (optional): (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by
X- REP: P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe(only for model with
this option enabled); P4 = Fourth probe, SET = set point; dtr = percentage of visualization.
dLy Display delay: (0 ÷20.0m; risul. 10s) when the temperature increases, the display is updated of
1 °C/1°F after this time.
dtr Percentage of the second and first probe for visualization when Lod = dtr (0÷100; 100 =
P1, 0 = P2 ): if Lod = 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
dFP Probe selection for defrost termination: nP = no probe; P1 =thermostat probe; P2 =
evaporator probe; P3 =configurable probe; P4 = Probe on Hot Key plug.
tdF Defrost type: EL = electricalheater; in = hot gas
dtE Defrost termination temperature: (-50÷50 °C/
-58÷122°F) (Enabled only when EdF=Pb) sets the temperature measured by the evaporator
probe, which causes the end of defrost.
IdF Interval between defrost cycles: (0÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF (Maximum) length for defrost: (0÷255min) When P2P = n, (not evaporator probe: timed
defrost) it sets the defrost duration, when P2P = y (defrost end based on temperature) it sets
the maximum length for defrost.
dSd Start defrost delay: ( 0÷99min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
dFd Temperature displayed during defrost: (rt = real temperature; it = temperature at defrost
start; SEt = set point; dEF = “dEF” label)
dAd MAX display delay after defrost: (0÷255min). Sets the maximum time between the end of
defrost and the restarting of the real room temperature display.
Fdt Drip time: (0120 min) time intervalbetween 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.
dPo First defrost after start-up: (y = immediately; n = after the IdF time)
dAF Defrost delay after continuous cycle: (023.5h) time interval between the end of the fast
freezing cycle and the following defrost related to it.
ALARMS
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: (SET÷110°C; SET÷230°F) when this temperature is reached
the alarm is enabled, after the “ALd”delay time.
ALL Minimum temperature alarm: (-50.0 ÷ SET°C; -58÷230°F when this temperature is reached
the alarm is enabled, after the “ALd”delay time.
AFH Differential for temperature alarm recovery: (0,1÷25,5°C; 1÷45°F) Intervention differentialfor
recovery of temperature alarm.
ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm
condition and alarm signalling.
dAO Exclusion of temperature alarm at startup: (from 0.0 min to 23.5h) time intervalbetween the
detection of the temperature alarm condition after instrument power on and alarm signalling.
CONDENSER TEMPERATURE ALARM (detected by the fourth probe)
AP2 Probe selection for temperature alarm of condenser: nP = no probe; P1 =thermostat probe;
P2 = evaporator probe; P3 =configurable probe; P4 = Probe on Hot Key plug.
AL2 Low temperature alarm of condenser:(-55÷150°C) when this temperature is reached the LA2
alarm is signalled, possibly after the Ad2 delay.
Au2 High temperature alarm of condenser:(-55÷150°C) when this temperature is reached the
HA2 alarm is signalled, possibly after the Ad2 delay.
AH2 Differential for temperature condenser alarm recovery:(0,1÷25,5°C; 1÷45°F)
Ad2 Condenser temperature alarm delay: (0÷255 min) time interval between the detection of the
condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarmexclusion at start up: (from 0.0 min to 23.5h, res. 10min)
bLL Compressor off with low temperature alarm of condenser:n = no: compressor keeps on
working; Y = yes, compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser:n = no: compressor keeps on
working; Y = yes, compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
DIGITAL INPUT
i1P Digital input polarity: oP: the digital input is activated by opening the contact; CL: the digital
input is activated byclosing thecontact.
i1F Digital input configuration: 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 =not enabled; Htr = kind of
action inversion (cooling – heating); FAn = not set it; ES = Energy saving.
did:(0255 min) with i1F= EAL or i1F = bAL digital input alarm delay: delay between the
detection of the external alarm condition and its signalling.
with i1F= dor: door open signalling delay
with i1F = PAL: time for pressure switch function: time interval to calculate the number of
the pressure switch activation.
nPS Pressure switch number: (0 15) Number of activation of the pressure switch, during the “did”
interval, before signalling the alarm event (I2F= PAL).
If the nPS activation in the did time is reached, switch off and on the instrument to
restart normal regulation.
odc Compressor status when open door: no; Fan = normal; CPr; F_C = Compressor OFF.
rrd Outputs restart after doA alarm: no = outputs not affected by the doA alarm; yES = outputs
restart with the doA alarm;
HES Temperature increase during the Energy Saving cycle : (-30,0°C30,0°C/-22÷86°F) it sets
the increasing value of the set point during the Energy Saving cycle.

1592020040 XR40CX GB m&M r1.1 22.06.2012 XR40CX 3/4
OTHER
Adr Serial address (1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC = PBC probe, ntc
= NTC probe.
onF on/off key enabling: nu = disabled; oFF = enabled; ES = not set it.
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display- optional.
dP4 Fourth probe display.
rSE Real set point: (readable only), it shows the set point used during the energy saving cycle or
during the continuous cycle.
rEL Software release for internaluse.
Ptb Parameter table code: readable only.
8. DIGITAL INPUT (ENABLED WITH P3P = N)
The free voltage digital input is programmable in different configurations by the “i1F”parameter.
8.1 DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “odc”parameter: no,
Fan = normal(any change); CPr, F_C = Compressor OFF.
Since the door is opened, after the delaytime set through parameter “did”, the door alarm is enabled,
the display shows the message “dA” and the regulation 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.
8.2 GENERIC ALARM (i1F = 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 don’t change. The alarm stops just after the digitalinput is
de-activated.
8.3 SERIOUS ALARM MODE (i1F = 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.
8.4 PRESSURE SWITCH (i1F = PAL)
If during the interval time set by “did” parameter, the pressure switch has reached the number of
activation 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.
8.5 START DEFROST (i1F = dFr)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6 INVERSION OF THE KIND OF ACTION: HEATING-COOLING(i1F = Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.7 ENERGY SAVING (i1F = 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 untilthe digitalinput is activated.
8.8 DIGITAL INPUTS POLARITY
The digitalinput polarity depends on the “i1P” parameter.
i1P=CL: the input is activated by closing the contact.
i1P=OP: the input is activated by opening the contact
9. TTL SERIAL LINE – FORMONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-RTU
compatible such as the X-WEB500/3000/300.
10. X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the HOY KEY
connector. The X-REP output EXCLUDES the serial connection.
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB-
52F(2m), CAB-55F(5m),
11. INSTALLATION AND MOUNTING
Instrument XR40CX shall be mounted on vertical panel, in a 29x71
mm hole, and fixed using the specialbracket supplied.
The temperature range allowed for correct operation is 060 °C.
Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to
probes. Let air circulate by the cooling holes.
12. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm2. 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 on each relay, in case of heavier
loads use a suitable external relay.
12.1 PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual 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 isformed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
13. HOW TO USE THE HOT KEY
13.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push okey; the "uPL" message
appears followed a by flashing “End”
3. Push “SET” keyand the End willstop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Err” message is displayed for failed programming. In this case push again okey if you
want to restart the upload again or remove the “Hot key” to abort the operation.
13.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory,
the “doL”message is blinking followed a by flashing “End”.
4. After 10 seconds the instrument will restart 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.
14. ALARM SIGNALS
Message
Cause Outputs
“P1” Room probe failure Compressor output acc. to par. “Con”and “COF”
“P2” Evaporator probe failure Defrost end is timed
“P3” Third probe failure Outputs unchanged
“P4” Fourth probe failure Outputs unchanged
“HA” Maximum temperature alarm Outputs unchanged.
“LA” Minimum temperature alarm 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 according to rrd
“EA” Externalalarm Output unchanged.
“CA” Serious externalalarm (i1F=bAL) Alloutputs OFF.
“CA” Pressure switch alarm (i1F=PAL) All outputs OFF
14.1 ALARM RECOVERY
Probe alarms P1”, “P2”, “P3” and “P4” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normaloperation. Check connections before
replacing the probe.
Temperature alarms “HA”, “LA” “HA2” and “LA2” automatically stop as soon as the temperature
returns to normal values.
Alarms “EA” and “CA” (with i1F=bAL) recover as soon as the digital input is disabled.
Alarm “CA” (with i1F=PAL) recovers only by switching off and on the instrument.
14.2 OTHER MESSAGES
Pon Keyboard unlocked.
PoF Keyboard locked
noP In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
noA None alarm is recorded.
15. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: XR40CX frontal32x74 mm; depth 60mm;
Mounting: XR40CX panelmounting in a 71x29mm panelcut-out
Protection: IP20; Frontal protection: XR40CX IP65
Connections: Screw terminalblock 2,5 mm2wiring.
Power supply: according to the model: 12Vac/dc, ±10%; 24Vac/dc, ±10%; 230Vac 10%,
50/60Hz, 110Vac 10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14,2 mm high; Inputs: Up to 4 NTC or PTC probes.
Digital input: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250Vac; or 20(8)A 250Vac
defrost: SPDT 8(3) A, 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2;Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C;Storage temperature: -30÷85 °C.
Relative humidity: 2085% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-40÷230°F);
PTC probe: -50÷150°C (-58÷302°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit
16. CONNECTIONS
The X-REP output excludes the TTL output.. It’s present in the following codes:
XR40CX- xx2xx, XR40CX –xx3xx;

1592020040 XR40CX GB m&M r1.1 22.06.2012 XR40CX 4/4
16.1 XR40CX – 8A COMPRESSOR
N.C.
12345
6
7
9
10 11
12
Comp
Def
E
v
a
p
.
R
o
o
m
8
HotKey/IVProbe
TTLor X-REPoutput
8(3)A250V 8(3)A250V
Line
9-40Vdc supply: connect to the terminals 7 and 8.
12Vac/dc supply: connect to the terminals 7 and 8.
24Vac/dc supply: connect to the terminals 7 and 8.
120Vac supply: connect to the terminals 7 and 8.
16.2 XR40CX – 20A COMPRESSOR
N.C.
12345
6
7
9
10 11
12
Comp
Def
E
v
a
p
.
R
o
o
m
8
HotKey/IVprobe
TTLor X-REP output
8(3)A250V 20(8)A250V
Line
9-40Vdc supply: connect to the terminals 7 and 8.
12Vac/dc supply: connect to the terminals 7 and 8.
24Vac/dc supply: connect to the terminals 7 and 8.
120Vac supply: connect to the terminals 7 and 8.
17. DEFAULT SETTING VALUES
Label
Name Range °C/°F
Set
Set point LS÷US -5.0 - - -
Hy Differential 0,125.5°C/ 1255°F 2.0 Pr1
LS
Minimum set point -50°CSET/-58°FSET -50.0 Pr2
US
Maximum set point SET110°C/ SET 230°F 110 Pr2
Ot Thermostat probe calibration -1212°C /-120120°F 0.0 Pr1
P2P
Evaporator probepresence n=not present; Y=pres. Y Pr1
OE
Evaporator probe calibration -1212°C /-120120°F 0.0 Pr2
P3P
Third probe presence n=not present; Y=pres. n Pr2
O3
Third probe calibration -1212°C /-120120°F 0 Pr2
P4P
Fourth probe presence n=not present; Y=pres. n Pr2
O4
Fourth probe calibration -1212°C /-120120°F 0 Pr2
OdS
Outputs delay at start up 0÷255 min 0 Pr2
AC
Anti-short cycle delay 0 50 min 1 Pr1
rtr P1-P2 percentage for regulation 0 ÷ 100 (100=P1 , 0=P2) 100 Pr2
CCt
Continuos cycle duration 0.0÷24.0h 0.0 Pr2
CCS
Set point for continuous cycle (-55.0÷150,0°C) (-67÷302°F) -5 Pr2
COn
Compressor ON time with faulty probe 0 255 min 15 Pr2
COF
Compressor OFF time with faultyprobe 0 255 min 30 Pr2
CF
Temperature measurement unit °C °F °C Pr2
rES
Resolution in=integer; dE= dec.point dE Pr1
Lod
Probe displayed P1;P2 P1 Pr2
rEd2
X-REP display P1 - P2 - P3 - P4 - SEt - dtr P1 Pr2
dLy
Display temperature delay 0 ÷ 20.0 min (10 sec.) 0 Pr2
dtr
P1-P2 percentage for disply 1 ÷ 99 50 Pr2
tdF
Defrost type EL=el. heater; in= hot gas EL Pr1
dFP
Probe selection for defrost termination nP; P1; P2; P3; P4 P2 Pr2
dtE
Defrost termination temperature -50 50 °C 8 Pr1
IdF
Interval between defrost cycles 1 120 ore 6 Pr1
MdF
(Maximum) length for defrost 0 255 min 30 Pr1
dSd
Start defrost delay 0÷99min 0 Pr2
dFd
Displaying during defrost rt, it, SEt, DEF it Pr2
dAd
MAX display delay after defrost 0 ÷ 255 min 30 Pr2
Fdt
Draining time 0÷120 min 0 Pr2
dPo
First defrost after startup n=after IdF; y=immed. n Pr2
dAF
Defrost delay after fast freezing 0 ÷ 23h e 50’ 0.0 Pr2
ALc
Temperat. alarms configuration rE= related to set;
Ab = absolute Ab Pr2
ALU
MAXIMUM temperature alarm Set110.0°C; Set÷230°F 110 Pr1
ALL
Minimum temperature alarm -50.0°CSet/ -58°FSet -50.0 Pr1
AFH
Differential for temperat. alarm recovery (0,1°C÷25,5°C) (1°F÷45°F) 1 Pr2
ALd
Temperature alarm delay 0 255 min 15 Pr2
dAO
Delay of temperature alarm at start up 0 23h e 50’ 1.3 Pr2
AP2
Probe for temperat. alarm of condenser nP; P1; P2; P3; P4 P4 Pr2
AL2
Condenser for low temperat. alarm (-55 ÷ 150°C) (-67÷ 302°F) -40 Pr2
AU2
Condenser for high temperat. alarm (-55 ÷ 150°C) (-67÷ 302°F) 110 Pr2
AH2
Differ. for condenser temp. alar. recovery
[0,1°C ÷ 25,5°C] [1°F ÷ 45°F]
5 Pr2
Ad2
Condenser temperature alarm delay 0 ÷ 254 (min.) , 255=nU 15 Pr2
dA2
Delay of cond. temper. alarm at start up 0.0 ÷ 23h 50’ 1,3 Pr2
bLL
Compr. off for condenser low
temperature alarm n(0) - Y(1) n Pr2
AC2
Compr. off for condenser high
temperature alarm n(0) - Y(1) n Pr2
i1P
Digital input polarity oP=opening;CL=closing cL Pr1
i1F
Digitalinput configuration EAL, bAL, PAL, dor; dEF; Htr,
AUS EAL Pr1
did
Digital input alarm delay 0÷255min 5 Pr1
Nps
Number of activation of pressure switch 0 ÷15 15 Pr2
odc
Compress status when open door no; Fan; CPr; F_C no Pr2
rrd
Regulation restart with door open alarm n – Y y Pr2
HES
Differentialfor EnergySaving (-30°C÷30°C) (-54°F÷54°F) 0 Pr2
Adr
Serialaddress 0÷247 1 Pr2
PbC
Kind of probe Ptc; ntc ntc Pr2
onF
on/off key enabling nu, oFF; ES nu Pr1
dP1
Room probe display -- -- Pr2
dP2
Evaporator probe display -- -- Pr2
dP3
Third probe display -- -- Pr1
dP4
Fourth probe display -- -- Pr1
rSE
Valore set operativo actual set -- Pr1
rEL
Software release -- -- Pr2
Ptb
Map code -- -- Pr2
2Onlyfor models XR40CX–xx2xx, XR40CX–xx3xx;