1592027600 XW90LT RTC GB r1.1 10.02.2012.doc
XW90LT
2/6
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
Fans enabled
Flashing Fans delay after defrost in progress.
ON
An alarm is occurring
ON
Continuous cycle is running
ON
Energy saving enabled
ON
Light on
ON
Auxiliary relay on
°C/°F
ON
Measurement unit
Flashing Programming phase
5.
AUTOMATIC KEYBOARD LOCK
To avoid accidental modifications of the controller settings, the XW90LT keyboard will be locked
automatically if no key will be touched for 60 seconds. The XW90LT will show “LoC” flashing for
few seconds when it’s locking. The light key is operating even if the keyboard is locked.
5.1
TO UNLOCK THE KEYBOARD
1.
Touch any key.
2.
The keys will be lighted.
3.
Keep a key pushed for few seconds till the “on” message is displayed.
6.
MAX & MIN TEMPERATURE MEMORIZATION
6.1
HOW TO SEE THE MIN TEMPERATURE
1.
Press and release the DOWN key.
2.
The “Lo” message will be displayed followed by the minimum temperature recorded.
3.
By pressing the DOWN key again or by waiting 5 sec the normal display will be restored.
6.2
HOW TO SEE THE MAX TEMPERATURE
1.
Press and release the UP key.
2.
The “Hi” message will be displayed followed by the maximum recorded temperature.
3.
By pressing the UP key again or by waiting 5 sec the normal display will be restored.
6.3
HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1.
Keep SET key pressed more than 3 sec, while the max or min temperature is displayed. (rSt
message will be displayed).
2.
To confirm the operation the “rSt” message starts blinking and the normal temperature will be
displayed.
7.
MAIN FUNCTIONS
7.1
TO SET THE CURRENT TIME AND DAY (ONLY WITH RTC)
When the instrument is switched on, it’s necessary to program the time and day.
1.
Enter the Pr1 programming menu, by pushing the SET+ DOWN
keys for 3 sec.
2.
The rtC parameter is displayed. Push the SET key to enter the real time clock menu.
3.
The Hur (hour) parameter is displayed.
4.
Push the SET and set current hour by the UP and DOWN keys, then push SET to
confirm the value.
5.
Repeat the same operations with Min (minutes) and dAy (day) parameters.
To exit: Push both SET+UP keys or wait for 15 sec without pushing any keys.
7.2
HOW TO SEE THE SET POINT
1.
Push and immediately release the SET key: the display will show the
Set point value.
2.
Push and immediately release the SET key or wait for 5 sec to display
the probe value again.
7.3
HOW TO CHANGE THE SETPOINT
1.
Push the SET key more than 2 sec to change the Set point value;
2.
The value of the set point will be displayed and the “°C” or “°F” LED will start blinking.
3.
To change the Set value, push both UP and DOWN arrows within 10 sec.
4.
To store the new set point value, push the SET key again or wait for 10 sec.
7.4
HOW TO START A MANUAL DEFROST
Push the DEF key more than 2 sec and to start a manual defrost.
7.5
HOW TO CHANGE A PARAMETER VALUE
To change any parameter, operate as follows:
1.
Enter the Programming mode by pressing both SET+DOWN keys for 3 sec (the “°C” or “°F” LED
will start blinking).
2.
Select the required parameter and then press the SET key to display its value.
3.
Use UP or DOWN keys to change its value.
4.
Press SET to store the new value and move to the following parameter.
To exit: press both SET+UP keys or wait for 15 sec without pressing any key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.
7.6
THE HIDDEN MENU
The hidden menu shows all the parameters of the instrument.
7.6.1 HOW TO ENTER THE HIDDEN MENU (Pr2)
1.
Enter the Programming mode by pressing the SET+DOWN keys for 3 sec (the “°C” or “°F” LED
will start blinking).
2.
Released the keys and then push again the SET+DOWN keys more than 7 sec. The “Pr2” label
will be displayed immediately followed by the HY parameter.
NOW THE HIDDEN MENU IS DISPLAYED.
3.
Select the required parameter.
4.
Press the SET key to display its value
5.
Use UP or DOWN keys to change its value.
6.
Press SET to store the new value and move to the following parameter.
To exit: press SET+UP keys or wait for 15 sec without pressing any key.
NOTE1: if no parameters are present in Pr1, after 3 sec the “noP” message will be 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.
7.6.2 MOVE A PARAMETER FROM Pr2 TO Pr1 AND VICEVERSA.
Each parameter present in the Pr2 (HIDDEN MENU) can be moved to the Pr1 (user level) by pressing
both SET+DOWN keys.
When in Pr2 (hidden menu) if a parameter is visible in Pr1, then the decimal point will be on.
7.7
MANUALLY LOCK AND UNLOCK THE KEYBOARD
+
HOW TO LOCK THE KEYBOARD
1.
Keep both UP+DOWN keys pressed more than 3 sec.
2.
The “PoF” message will be displayed and the keyboard is locked. At
this point it is only possible the viewing of the set point or the MAX o
Min temperature stored and to switch ON and OFF the light, the
auxiliary output and the instrument.
HOW TO UNLOCK THE KEYBOARD
Keep bothj UP+DOWN keys pressed more than 3 sec.
7.8
THE CONTINUOUS CYCLE
When defrost is not active, a continuous cycle can be activated by keeping the UP key pressed for
about 3 sec. 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 by keeping the UP key
pressed 3 sec.
7.9
THE ON/OFF FUNCTION
With onF=oFF, after pushing the ON/OFF key the instrument is switched off. The
“OFF” message will be 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.
8.
PARAMETERS
rtC
Real time clock menu (only for controller with RTC): to set the time, date and
defrost start time.
REGULATION
HY
Differential: (0.1 to 25.5°C; 1 to 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 to SET; -67°F to SET) sets the minimum value for the set
point.
US
Maximum set point: (SET to 150°C; SET to 302°F) set the maximum value for set
point.
ot
Thermostat probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the thermostat probe.
P2P
Evaporator probe presence: (n; Y) n = not present, the defrost stops by time;
Y = present, the defrost stops by temperature.
oE
Evaporator probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the evaporator probe.
P3P
Third probe presence (P3): (n; Y) n = not present, the terminals 18-20 operate as
digital input; Y = present, the terminals 18-20 operate as third probe.
o3
Third probe calibration (P3): (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the third probe.
P4P
Fourth probe presence: (n; Y) n = Not present; Y = present.
o4
Fourth probe calibration: (-12.0 to 12.0°C; -21 to 21°F) allows to adjust possible
offset of the fourth probe.
odS
Outputs activation delay at start up: (0 to 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 to 50min) minimum interval between the compressor stop
and the following restart.
rtr
Percentage of the second and first probe for regulation: (0 to 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 to 24h00min, res. 10min) allows
to set the length of the continuous cycle. Compressor stays on without interruption
during CCt time. This is useful, for instance, when the room is filled with new products.
CCS
Set point for continuous cycle: (-55 to 150°C; -67 to 302°F) it sets the set point
used during the continuous cycle.
Con
Compressor ON time with faulty probe: (0 to 255min) time during which the
compressor is active in case of faulty thermostat probe. With Con=0 compressor is
always OFF.
