1592020080 XR72CX GB m&M r1.1 27.03.2015
XR72CX
2/4
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
+
n
keys 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 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
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
+
n
keys for 3s (the “
°C” or “°F”
LED starts
blinking).
2.
Released the keys, then push again the Set+
n
keys for more than 7s. The Pr2 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
o
or
n
to change its value.
6.
Press “
SET
” to store the new value and move to the following parameter.
To exit
: Press
SET +
o
or wait 15s without pressing a key.
NOTE1:
if none parameter is present in Pr1, after 3s the “noP” message is displayed. Keep the keys
pushed till the 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 Level the decimal point 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 will be displayed.
6.7
TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the
o
and
n
keys, 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 activation key
“
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 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:
(- 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 value for 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 stops by time;
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 terminal operates 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 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.
AC1 2
nd
compressor delay at start up
(0÷255s) Time interval between the switching on of the first
compressor and the second one.
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 faulty thermostat 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 decimal point 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
tdF Defrost type
: EL = electrical heater; in = hot gas
dFP Probe selection for defrost termination: nP
= no probe;
P1
=thermostat probe;
P2 =
evaporator probe;
P3
=configurable probe;
P4
= Probe on Hot Key plug.
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 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.
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.
FANS
FnC Fans operating mode
:
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 during defrost;
Fnd Fans delay after defrost:
(0÷255min) Interval between end of defrost and evaporator fans
start.
Fct Temperature differential avoiding short cycles of fans
(0÷59°C; Fct=0 function disabled). If
the difference of temperature between the evaporator and the room probes is more than the
value of the Fct parameter, the fans are switched on.
FSt Fans stop temperature
: (-50÷50°C/122°F) setting of temperature, detected by evaporator
probe, above which fans are always OFF.
Fon Fan ON time:
(0÷15 min)
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
the fan are always off, with Fon=0 and FoF =0 the fan are always off.
FoF Fan OFF time:
(0÷15 min)
with
Fnc = C_n or C_y, (fan activated in parallel with compressor). it
sets the evaporator fan off cycling time when the compressor is off. With Fon =0 and FoF ≠ 0
the fan are always off, with Fon=0 and FoF =0 the fan are always off.
FAP Probe selection for fan management: nP
= no probe;
P1
=thermostat probe;
P2 =
evaporator
probe;
P3
=configurable probe;
P4
= Probe on Hot Key plug.
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/ fan recovery:
(0,1÷25,5°C; 1÷45°F) Intervention
differential for recovery of temperature alarm. It’s also used for the restart of the fan when the
FSt temperature is reached
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 interval between the
detection of the temperature alarm condition after instrument power on and alarm signalling.
CONDENSER TEMPERATURE ALARM
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.
