Operating Manual
1/3
DIGITAL CONTROLLER WITH DEFROST AND
FANS MANAGEMENT
XR06CX
1. CONTENTS
1.
Contents____________________________________________________________________________ 1
2.
General warnings _____________________________________________________________________ 1
3.
General description ___________________________________________________________________ 1
4.
Regulation __________________________________________________________________________ 1
5.
Defrost _____________________________________________________________________________ 1
6.
Fans _______________________________________________________________________________ 1
7.
Front panel commands ________________________________________________________________ 1
8.
Parameters__________________________________________________________________________ 2
9.
Digital inputs (ONLY XR03CX) __________________________________________________________ 2
10.
Installation and mounting _______________________________________________________________ 2
11.
Electrical connections _________________________________________________________________ 2
12.
How to use the hot key_________________________________________________________________ 2
13.
Alarm signalling ______________________________________________________________________ 2
14.
Technical data _______________________________________________________________________ 2
15.
Connections _________________________________________________________________________ 3
16.
Default setting values__________________________________________________________________ 3
2. GENERAL WARNINGS
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.
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.
3. GENERAL DESCRIPTION
The
XR06CX
,
format 32 x 74 x 60 mm
, is microprocessor based controller, suitable for applications
on medium or low temperature ventilated refrigerating units. It has three relay outputs to control
compressor, fan, and defrost which can be either electrical or reverse cycle (hot gas). 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.
4. 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
”.
5. DEFROST
Two defrost modes are available through the “
td
” parameter:
•
td=EL
→
defrost through electrical heater (compressor OFF)
•
td=in
→
hot gas defrost (compressor ON).
Other parameters are used to control the interval between defrost cycles (
id
) ), its maximum length
(
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.
6. FANS
With
FC
parameter it can be selected the fans functioning:
•
FC=cn
→
will switch ON and OFF with the compressor and
not run
during defrost
•
FC=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.
•
FC=cy
→
fans will switch ON and OFF with the compressor and
run
during defrost
•
FC=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
”
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.
7. FRONT 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
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.
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.
HOW TO START A MANUAL DEFROST
Push the
DEF
key for more than 2 seconds and a manual defrost will start
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.
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 aren’t any 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.
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.
TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the and keys till the
“on”
message will be displayed.
