Emerson dixell XR03CX Wiring diagram

1598025700 XR03CX YND GB r1.0 12.01.2015.docx XR03CX 1/3
DIGITAL CONTROLLER WITH DEFROST AND
FANS MANAGEMENT
XR03CX
1General warnings............................................................................................................................................. 1
2General description.......................................................................................................................................... 1
3Regulation ........................................................................................................................................................ 1
4Defrost.............................................................................................................................................................. 1
5Fans.................................................................................................................................................................. 1
6Front panel commands .................................................................................................................................... 1
7Parameters....................................................................................................................................................... 2
8Digital inputs..................................................................................................................................................... 2
9Installation and mounting................................................................................................................................. 2
10 Electrical connections ...................................................................................................................................... 2
11 How to use the hot key .................................................................................................................................... 2
12 Alarm signalling................................................................................................................................................ 2
13 Technical data.................................................................................................................................................. 3
14 Connections ..................................................................................................................................................... 3
15 Default setting values....................................................................................................................................... 3
1GENERAL WARNINGS
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
the same 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 electrical 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.p.A.” (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.
In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with
inductive loads could be useful.
2GENERAL DESCRIPTION
The XR03CX, format 32 x 74 x 60 mm, is microprocessor based controller, suitable for applications
on medium or low temperature ventilated refrigerating units. It has 2 relay outputs to control
compressor and fan. The device is also provided with 2 NTC probe inputs, the first one for temperature
control and the second one to be located onto the evaporator, to control the defrost termination
temperature and to managed the fan and it’s provided with a configurable digital input. With the
HOTKEY it’s possible to program the instrument in a quick and easy way.
3REGULATION
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.
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “Cy” and “Cn”.
4DEFROST
Defrost is performed through a simple stop of the compressor.
Parameter “idis used to control the interval between defrost cycles, its maximum length by parameter
Md and two defrost modes: timed or controlled by the evaporator’s probe.
At the end of defrost dripping time is started, its length is set in the dt parameter. With dt=0 the
dripping time is disabled.
5FANS
With F1 or F2 parameters it can be selected the fans functioning.
F1 is used when SET > = do
F1 is used when SET < do
F1 or F2 =cn will switch ON and OFF with the compressor and not run during defrost
F1 or F2 =on fans will run even if the compressor is off, and not run during defrost
After defrost, there is a timed fan delay allowing for drip time, set by means of the “Fd” parameter.
F1 or F2 =cy fans will switch ON and OFF with the compressor and run during defrost
F1 or F2 =oY fans will run continuously also during defrost.
An additional parameter “FS” provides the setting of temperature, detected by the evaporator 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 “FS”
5.1.1 Cyclical activation of the fans with compressor off
When F1 or F2 = cn or cY (fans in parallel to the compressor), by means of the Fn and FF parameters the fans
can carry out on and off cycles even if the compressor is switched off. When the compressor is stopped the
fans go on working for the Fn time. With Fn =0 the fans remain always off, when the compressor is off.
5.2 FANS AND DIGITAL INPUT
When the digital input is configured as door switch iF=do, fans and compressor status depends on the
dC parameter value:
dC=no normal regulation;
dC=Fn fans OFF;
dC=cP compressor OFF;
dC=Fc compressor and fans OFF.
When rd=y, the regulation restart with door open alarm.
6FRONT PANEL COMMANDS
To display target set point, in
programming mode it selects a
parameter or confirm an
operation
To start a manual defrost
In programming mode it browses
the parameter codes or increases
the displayed value
AUX
In programming mode it browses
the parameter codes or
decreases the displayed value
KEYS COMBINATION
+
To lock or unlock the keyboard
+
To enter in programming mode
+
To return to room temperature display
LED MODE SIGNIFICATO
On Compressor enabled
Flashing Anti-short cycle delay enabled (AC parameter)
On Defrost in progress
Flashing Dripping in progress
On Fans output enabled
Flashing Fans delay after defrost
On Measurement unit
Flashing Programming mode
On Measurement unit
Flashing Programming mode
6.1 HOW TO SEE THE SET POINT
1. Push and immediately release the SET key, the set point will be showed;
2. Push and immediately release the SET key or wait about 5s to return to normal visualisation.
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 will be displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the or arrows.
4. To memorise the new set point value push the SET key again 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:
1. Enter the Programming mode by pressing the SET+ keys for 3s (“°C” or “°F” LED starts
blinking).
2. Select the required parameter. Press the “SET” key to display its value
3. Use or to change its value.
4. Press “SET” to store the new value and move to the following parameter.
To exit: Press SET+ or wait 15s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.
6.5 HIDDEN MENU
The hidden menu includes all the parameters of the instrument.
HOW TO ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the SET+ keys for 3s (“°C” or “°F” LED starts
blinking).
2. Released the keys, then push again the SET+ keys for more than 7s. The L2 label will be
displayed immediately followed from the Hy parameter.
NOW YOU ARE IN THE HIDDEN MENU.
3. Select the required parameter.
4. Press the “SET” key to display its value
5. Use or to change its value.
6. Press “SET” to store the new value and move to the following parameter.
To exit: Press SET+ or wait 15s without pressing a key.
NOTE1: if there is no parameter in L1, after 3s the “nP” message is displayed. Keep the keys pushed
till the L2 message is displayed.
NOTE2: the set value is stored even when the procedure is exited by waiting the time-out to expire.
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+ . In HIDDEN MENU when a parameter is present in First Level the decimal
point is on.

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6.6 TO LOCK THE KEYBOARD
1. Keep pressed for more than 3s the and keys.
2. The “OF” message will be displayed and the keyboard will be locked. If a key is pressed more
than 3s the “OF” message will be displayed.
6.7 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the and keys till the “on” message will be displayed.
7PARAMETERS
REGULATION
Hy Differential: (0,1°C 25°C / 1°F ÷ 45°F) Intervention differential for 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: (-55°C÷SET/-67°F÷SET): Sets the minimum value for the set point..
US Maximum SET POINT: (SET÷99°C/ SET÷99°F). Set the maximum value for set point.
ot First probe calibration: (-9.9÷9.9°C / -17°F ÷ 17°F) allows to adjust possible offset of the first
probe.
P2 Evaporator probe presence: n= not present; y= the defrost stops by temperature.
oE Second probe calibration: (-9.9÷9.9°C / -17°F ÷ 17°F) allows to adjust possible offset of the
second probe.
od Outputs activation delay at start up: (0÷99min) This function is enabled at the initial start-up of
the instrument and inhibits any output 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.
Cy Compressor ON time with faulty probe: (0÷99 min) time during which the compressor is active
in case of faulty thermostat probe. With Cy=0 compressor is always OFF.
Cn Compressor OFF time with faulty probe: (0÷99 min) time during which the compressor is OFF
in case of faulty thermostat probe. With Cn=0 compressor is always active.
DISPLAY
CF Measurement unit: (°C÷°F) °C =Celsius; °F =Fahrenheit. WARNING: When the measurement
unit is changed the SET point and the values of the parameters Hy, LS, US, oE, o1, AU, AL have
to be checked and modified if necessary.
rE Resolution (only for °C):(dE ÷ in) dE= decimal between -9.9 and 9.9°C; in= integer
Ld Default display: (P1 ÷ P2) P1= thermostat probe; P2= evaporator probe. SP=Set point (only
XR04CX)
dy Display delay: (015 min.) when the temperature increases, the display is updated of 1 °C/1°F
after this time.
DEFROST
dE Defrost termination temperature: (-55÷50°C / -67÷99°F) if P2=Y it sets the temperature
measured by the evaporator probe, which causes the end of defrost.
do Set for fan regulation: (-55÷50°C / -67÷99°F); See parameters F1 and F2
id Interval between defrost cycles: (0÷99 minutes) Determines the time interval between the
beginning of two defrost cycles.
Md Maximum length for defrost: (0÷99 min. with 0 no defrost) when P2=n, (not evaporator probe:
timed defrost) it sets the defrost duration, when P2 = y (defrost end based on temperature) it sets
the maximum length for defrost.
dF Display during defrost: (rt / it / SP / dF) rt= real temperature; it= start defrost temperature; SP=
SET-POINT; dF= label dF.
FANS
F1 Fans operating mode with SET >= do: (cn, on, cY, oY) cn= in runs with the compressor, OFF
during defrost; on= continuous mode, OFF during defrost;; cY= runs with the compressor, ON
during defrost; oY= continuous mode, ON during defrost.
F2 Fans operating mode with SET < do: (cn, on, cY, oY) cn= in runs with the compressor, OFF
during defrost; on= continuous mode, OFF during defrost;; cY= runs with the compressor, ON
during defrost; oY= continuous mode, ON during defrost.
Fd Fans delay after defrost: (0÷99 min) Interval between end of defrost and evaporator fans start.
FS Fans stop temperature: (-55÷50°C / -67°F ÷ 99°F) setting of temperature, detected by
evaporator probe, above which fans are always OFF.
Fn Fan ON time: (0÷15 min) with F1 or F2 = Cn or Cy, (fan activated in parallel with compressor). it sets the
evaporator fan ON cycling time when the compressor is off. With Fn =0 and FF ≠ 0 the fan are always
off, with Fn=0 and FF =0 the fan are always off.
FF Fan OFF time: (0÷15 min) with F1 or F2 = Cn or Cy, (fan activated in parallel with compressor). it sets the
evaporator fan off cycling time when the compressor is off. With Fn =0 and FF ≠ 0 the fan are always
off, with Fn=0 and FF =0 the fan are always off.
ALARMS
AU Maximum temperature alarm: (AL÷99°C/99°F) when this temperature is reached the alarm is
enabled, after the “Ad” delay time.
AL Minimum temperature alarm: (-55÷AU°C /-67÷AU°F) when this temperature is reached the
alarm is enabled, after the “Ad” delay time.
Ad Temperature alarm delay: (0÷99 min) time interval between the detection of an alarm condition
and alarm signalling.
dA Exclusion of temperature alarm at startup: (0÷99 min) time interval between the detection of
the temperature alarm condition after instrument power on and alarm signalling.
DIGITAL INPUT
iP Digital input polarity: (oP ÷ cL) oP= activated by closing the contact; cL= activated by opening
the contact;
iF Digital input configuration: (EA/bA/do/dF/Au/Hc) EL= external alarm: “EA” message is
displayed; bA= serious alarm “CA” message is displayed; PA = do not set it; do= door switch
function; dF= defrost activation; Au =not used; Hc= inversion of the kind of action; Fn, ES = do
not set it
di Digital input delay: (0÷99 min) with iF=EA or bA delay between the detection of the external
alarm condition and its signalling. . With iF=do it represents the delay to activate the door open
alarm.
dC Compressor and fan status when open door: (no/Fn/cP/Fc): no= normal; Fn = Fans OFF; cP
=Compressor OFF; Fc = Compressor and fans OFF;
rd Regulation with door open: (n÷y) n= no regulation if door is opened; Y= when di is elapsed
regulation restarts even if door open alarm is present;
OTHER
d1 Thermostat probe display (read only)
d2 Evaporator probe display (read only)
rL Software release
Pt Parameter code table
8DIGITAL INPUTS
The free voltage digital input is programmable in different configurations by the “i1F” parameter.
8.1 DOOR SWITCH (IF=DO)
It signals the door status and the corresponding relay output status through the “dC” parameter: no =
normal (any change); Fn = Fan OFF; CP = Compressor OFF; FC = Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter “di”, the door alarm is enabled,
the display shows the message “dA” and the regulation restarts if rd = y. 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 EXTERNAL ALARM (IF=EL)
As soon as the digital input is activated the unit will wait for “di” time delay before signalling the “EA”
alarm message. The outputs status doesn’t change. The alarm stops just after the digital input is de-
activated.
8.3 SERIOUS ALARM (IF=BA)
When the digital input is activated, the unit will wait for “di” 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 START DEFROST (IF=DF)
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 “Md” safety time is
expired.
8.5 INVERSION OF THE KIND OF ACTION: HEATING - COOLING (IF=HC)
This function allows inverting the regulation of the controller: from cooling to heating and viceversa.
9INSTALLATION AND MOUNTING
Instrument XR03CX shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket 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.
10 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.
10.1 PROBES
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 is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
11 HOW TO USE THE HOT KEY
11.1 HOW TO PROGRAM THE 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 key; the "uP" message appears
followed a by flashing “Ed”
3. Push “SET” key and the “Ed” will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want
to restart the upload again or remove the “Hot key” to abort the operation.
11.2 HOW TO PROGRAM AN INSTRUMENT USING 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
“do” message is blinking followed a by flashing “Ed”.
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the “Hot Key”..
NOTE: the “Er” message is displayed for failed programming. In this case push again o key if you want
to restart the upload again or remove the “Hot key” to abort the operation.
12 ALARM SIGNALLING
Mess. Cause Outputs
"P1" Room probe failure Compressor output according to “Cy” e “Cn”
"P2" Evaporator probe failure Defrost end is timed
"HA" Maximum temperature alarm Outputs unchanged
"LA" Minimum temperature alarm Outputs unchanged

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Mess. Cause Outputs
“EA” External alarm Outputs unchanged
“CA” Serious external alarm All outputs OFF
“dA” Door Open Compressor and fans restarts
12.1 ALARM RECOVERY
Probe alarms P1” and “P2” start some seconds after the fault in the related probe; they automatically
stop some seconds after the probe restarts normal operation. Check connections before replacing the
probe. Temperature alarms “HA” and “LA” automatically stop as soon as the temperature returns to
normal values.
Alarms “EA” and “CA” (with iF=bL) recover as soon as the digital input is disabled.
13 TECHNICAL DATA
Housing: self extinguishing ABS.
Case: frontal 32x74 mm; depth 60mm;
Mounting: panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: IP65
Connections: Screw terminal block 2,5 mm2wiring.
Power supply: according to the model 230Vac 10%, 50/60Hz --- 110Vac 10%, 50/60Hz
Power absorption: 3.5VA max
Display: 2 digits, red LED, 14,2 mm high; Inputs: Up to 2 NTC.
Digital input: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250Vac; SPST 16(6)A 250Vac or 20(8)A 250Vac
fan: SPDT 8(3) A, 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution degree: 2;Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C;Storage temperature: -25÷60 °C.
Relative humidity: 2085% (no condensing)
Measuring and regulation range: NTC -40÷110°C;
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,1 °C ±1 digit
14 CONNECTIONS
14.1 XR03CX – 20+8A– 110VAC OR 230VAC
NOTE: Model at 120Vac, connect power supply to 6-7 terminals
15 DEFAULT SETTING VALUES
LABEL DESCRIPTION RANGE °C °F LEVEL
REGULATION
St Set point LS÷US 0 32 -
Hy Differential 0.1 ÷ 25°C/1 ÷ 45°F 4 6 Pr1
LS Minimum Set Point -55°C÷SET/-67°F÷SET -25 -10 Pr2
US Maximum Set Point SET÷99°C/SET÷99°F 10 50 Pr2
ot First probe calibration -9.9÷9.9°C/-17÷17°F 0 0 Pr1
P2 Second probe presence n – Y Y Y Pr1
oE Second probe calibration -9.9÷9.9°C/-17÷17°F 0 0 Pr2
od
Outputs activation delay
at start up 0 ÷ 99 min 1 1 Pr2
AC Anti-short cycle delay 0 ÷ 50 min 5 5 Pr1
Cy
Compressor ON time
faulty probe 0 ÷ 99 min 15 15 Pr2
Cn
Compressor OFF time
faulty probe 0 ÷ 99 min 15 15 Pr2
DISPLAY
CF Measurement units °C - °F °C °F Pr2
rE Resolution (only for °C) dE – in in In Pr1
Ld Default Display P1 - P2 - SP P1 P1 Pr2
dy Display delay 0 ÷ 15 min 1 1 Pr2
DEFROST
dE
Defrost termination
temperature -55÷50°C/-67÷99°F 5 41 Pr1
do
Set for defrost relay
activation with td=Ar -55÷50°C/-67÷99°F 0 32 Pr1
id
Interval between defrost
cycles 0 ÷ 99 hours 6 6 Pr1
Md
Maximum length for
defrost 0 ÷ 99 min. 30 30 Pr1
dF Display during defrost rt – in – SP – dF It It Pr2
FANS
F1
Fans operating mode
(Set>=do) cn – on – cY – oY Cy Cy Pr1
LABEL DESCRIPTION RANGE °C °F LEVEL
F2
Fans operating mode
(Set<do) cn – on – cY – oY Cn Cn Pr1
Fd Fans delay after defrost 0 ÷ 99 min 2 2 Pr1
FS Fans stop temperature -55÷50°C/-67÷99°F 5 41 Pr2
Fn
Fan on time with
compressor off 0÷15 (min.) 1 1 Pr1
FF
Fan off time with
compressor off 0÷15 (min.) 3 3 Pr1
ALARMS
AU
Maximum temperature
alarm ALL÷99°C / ALL÷99°F 99 99 Pr1
AL
Minimum temperature
alarm -55°C÷ALU/-67°F÷ALU -55 -67 Pr1
Ad Temperature alarm delay 0 ÷ 99 min 99 99 Pr2
dA
Exclusion of temperature
alarm at startup 0 ÷ 99 min 99 99 Pr2
DIGITAL INPUT
iP Digital input polarity cL – oP CL CL Pr1
iF Digital input configuration
EA
–
bA
–
do
–
dF
–
Au
– Hc EL EL Pr1
di Digital input delay 0 ÷ 99 min 5 5 Pr1
dC
Compressor and fan
status when open door no /Fn / cP / Fc Fn Fn Pr2
rd
Regulation with door
open n - Y y Y Pr2
OTHER
d1 Thermostat probe display Read Only - - Pr2
d2 Evaporator probe display Read Only - - Pr1
Pt Parameter code table Read Only - - Pr2
rL Firmware release Read Only - - Pr2