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DIGITAL CONTROLLER WITH DEFROST AND
FANS MANAGEMENT
XR03CX
1
General warnings ............................................................................................................................................. 1
2
General description .......................................................................................................................................... 1
3
Regulation ........................................................................................................................................................ 1
4
Defrost .............................................................................................................................................................. 1
5
Fans .................................................................................................................................................................. 1
6
Front panel commands .................................................................................................................................... 1
7
Parameters ....................................................................................................................................................... 2
8
Digital inputs ..................................................................................................................................................... 2
9
Installation 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
1
GENERAL 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.
2
GENERAL 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.
3
REGULATION
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".
4
DEFROST
Defrost is performed through a simple stop of the compressor.
Parameter "id is 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.
5
FANS
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"
1598025700 XR03CX YND GB r1.0 12.01.2015.docx
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.
6
FRONT PANEL COMMANDS
KEYS COMBINATION
+
+
+
LED
MODE
On
Flashing
On
Flashing
On
Flashing
On
Flashing
On
Flashing
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
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+
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+
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+
blinking).
2. Released the keys, then push again the SET+
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+
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+
point is on.
XR03CX
AUX
To lock or unlock the keyboard
To enter in programming mode
To return to room temperature display
SIGNIFICATO
Compressor enabled
Anti-short cycle delay enabled (AC parameter)
Defrost in progress
Dripping in progress
Fans output enabled
Fans delay after defrost
Measurement unit
Programming mode
Measurement unit
Programming mode
or
arrows.
keys for 3s ("°C" or "°F" LED starts
or wait 15s without pressing a key.
keys for 3s ("°C" or "°F" LED starts
keys for more than 7s. The L2 label will be
or wait 15s without pressing a key.
. In HIDDEN MENU when a parameter is present in First Level the decimal
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
In programming mode it browses
the
parameter
codes
or
decreases the displayed value
1/3
Related Manuals for Emerson dixell XR03CX
Summary of Contents for Emerson dixell XR03CX
- Page 1 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 DIGITAL CONTROLLER WITH DEFROST AND 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.
- Page 2 TO LOCK THE KEYBOARD OTHER Thermostat probe display (read only) Keep pressed for more than 3s the keys. Evaporator probe display (read only) The “OF” message will be displayed and the keyboard will be locked. If a key is pressed more Software release than 3s the “OF”...
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Page 3
Mess. Cause Outputs LABEL DESCRIPTION RANGE °C °F LEVEL “EA” External alarm Outputs unchanged Fans operating mode cn – on – cY – oY “CA” Serious external alarm All outputs OFF (Set