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4.8 TO ENTER IN PARAMETERS LIST "PR2"

To access parameters in "Pr2":

Enter the "Pr1" level.

Select "Pr2" parameter and press the "SET" key.

The "PAS" flashing message is displayed, shortly followed by "0 - -" with a flashing zero.

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Use

to input the security code in the flashing digit; confirm the figure by pressing "SET". The

security code is "321".

If the security code is correct the access to "Pr2" is enabled by pressing "SET" on the last digit.

Another possibility is the following: after switching ON the instrument the user can push Set and DOWN keys

within 30 seconds.

NOTE: each parameter in "Pr2" can be removed or put into "Pr1" (user level) by pressing "SET" +

parameter is present in "Pr1" LED

is on.

4.9 HOW TO CHANGE THE PARAMETER VALUE

1. Enter the Programming mode.

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2. Select the required parameter with

3. Press the "SET" key to display its value (

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4. Use

to change its value.

5. 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 new programming is stored even when the procedure is exited by waiting the time-out.

4.10 HOW TO LOCK THE KEYBOARD

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Keep the

and

keys pressed together for more than 3 s the

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.

TO UNLOCK THE KEYBOARD

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Keep the

and

keys pressed together for more than 3s.

4.11 ON/OFF FUNCTION

By pushing the ON/OFF key, the instrument shows "OFF" for 5 sec. and the ON/OFF LED is

switched ON.

During the OFF status, all the relays are switched OFF and the regulations are stopped; if a

monitoring system is connected, it does not record the instrument data and alarms.

N.B. During the OFF status the Light button is active.

4.12 TO SEE THE PROBE VALUES

Enter in "Pr2" level.

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Select "Prd" parameter with

Press the "SET" key to display "Pb1" label alternate with Pb1 value.

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Use

and

keys to display the other probe values.

Press "SET" to move to the following parameter.

5. PARAMETER LIST

REGULATION

Differential: (0,1÷25,5°C; 1÷45°F): Intervention differential for set point, always positive. Compressor

Cut IN is Set Point Plus Differential (Hy). Compressor Cut OUT is when the temperature reaches the set

point.

Minimum set point limit: (-50,0°C

SET; -58°F÷SET) Sets the minimum acceptable value for the set

point.

US Maximum set point limit: (SET

110°C; SET÷230°F) Set the maximum acceptable value for set point.

OdS Outputs activation delay at start up: (0÷255 min) 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. (Light can work)

AC Anti-short cycle delay: (0÷30 min) interval between the compressor stop and the following restart.

CCt Thermostat override: (0min ÷23h 50min) allows to set the length of the continuous cycle. Can be used,

for instance, when the room is filled with new products.

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

Temperature measurement unit: °C = Celsius; °F = Fahrenheit. When the measurement unit is

changed the SET point and the values of some parameters have to be modified.

rES Resolution (for °C): (in = 1°C; de = 0,1°C) allows decimal point display.

de = 0,1°C

in = 1 °C

Lod Local display : select which probe is displayed by the instrument:

P1 = Thermostat probe

P2 = Evaporator probe

P3 = auxiliary probe

1r2 = difference between P1 and P2 (P1-P2)

Red Remote display : select which probe is displayed by the remote display (XW-REP)

P1 = Thermostat probe

P2 = Evaporator probe

P3 = auxiliary probe

1r2 = difference between P1 and P2 (P1-P2)

DEFROST

tdF Defrost type:

rE = electrical heater (Compressor OFF)

rT = thermostat defrost. During the defrost time "MdF", the heater switches On and OFF depending on

the evaporator temperature and "dtE" value.

in = hot gas (Compressor and defrost relays ON)

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and

LED starts blinking).

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and

keys.

EdF Defrost mode:

in = interval mode. The defrost starts when the time "Idf" is expired.

Sd = Smartfrost mode. The time IdF (interval between defrosts) is increased only when the compressor

is running (even non consecutively) and only if the evaporator temperature is less than the value in "SdF"

(set point for SMARTFROST).

SdF Set point for SMARTFROST: (-30

counting (interval between defrosts) in SMARTFROST mode.

dtE Defrost termination temperature: (-50,0÷110,0°C; -58÷230°F) (Enabled only when the evaporator

probe is present) sets the temperature measured by the evaporator probe which causes the end of

defrost.

IdF Interval between defrosts: (1÷120h) Determines the time interval between the beginning of two defrost

cycles.

MdF (Maximum) duration of defrost: (0÷255 min) When P2P = n, no evaporator probe, it sets the defrost

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duration, when P2P = y, defrost end based on temperature, it sets the maximum length for defrost.

. When a

dFd Display during defrost:

rt = real temperature;

it = temperature reading at the defrost start;

Set = set point;

dEF = "dEF" label;

dEG = "dEG" label;

dAd Defrost display time out: (0

restarting of the real room temperature display.

Fdt Drain down time: (0÷60 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 fast freezing: (0min÷23h 50min) after a Fast Freezing cycle, the first defrost will be

delayed for this time.

FANS

FnC Fan operating mode:

C-n = running with the compressor, OFF during the defrost;

C-y = running with the compressor, ON during the defrost;

O-n = continuous mode, OFF during the defrost;

O-y = continuous mode, ON during the defrost;

Fnd Fan delay after defrost: (0÷255 min) The time interval between the defrost end and evaporator fans

start.

FSt Fan stop temperature: (-50÷110°C; -58÷230°F) setting of temperature, detected by evaporator probe,

above which the fan is always OFF.

ALARMS

ALC Temperature alarm configuration

rE = High and Low alarms related to Set Point

Ab = High and low alarms related to the absolute temperature.

ALU High temperature alarm setting:

ALC= rE, 0

50°C or 90°F

ALC= Ab, ALL

110°C or 230°F

when this temperature is reached and after the ALd delay time the HA alarm is enabled.

ALL Low temperature alarm setting:

ALC = rE , 0

50 °C or 90°F

ALC = Ab , - 50°C or -58°F

when this temperature is reached and after the ALd delay time, the LA alarm is enabled,.

AFH Temperature alarm and fan differential: (0,1÷25,5°C; 1÷45°F) Intervention differential for temperature

alarm set point and fan regulation set point, always positive.

ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm condition and

the corresponding alarm signalling.

dAO Delay of temperature alarm at start-up: (0min÷23h 50min) time interval between the detection of the

temperature alarm condition after the instrument power on and the alarm signalling.

EdA Alarm delay at the end of defrost: (0

alarm condition at the end of defrost and the alarm signalling.

dot Delay of temperature alarm after closing the door : (0

alarm condition after closing the door.

doA Open door alarm delay:(0÷255 min) delay between the detection of the open door condition and its

alarm signalling: the flashing message "dA" is displayed.

nPS Pressure switch number: (0

before signalling the alarm event (I2F= PAL).

PROBE INPUTS

Thermostat probe calibration: (-12.0

thermostat probe.

OE Evaporator probe calibration: (-12.0

evaporator probe.

Auxiliary probe calibration: (-12.0

evaporator probe.

P2P Evaporator probe presence:

n= not present: the defrost stops only by time; y= present: the defrost stops by temperature and time.

P3P Auxiliary probe presence: n= not present; y= present.

HES Temperature increase during the Energy Saving cycle : (-30,0°C

increasing value of the set point during the Energy Saving cycle.

DIGITAL INPUTS

odc Compressor and fan status when open door:

no = normal;

Fan = Fan OFF;

CPr = Compressor OFF;

F_C = Compressor and fan OFF.

I1P Door switch input polarity:

CL : the digital input is activated by closing the contact;

OP : the digital input is activated by opening the contact.

I2P Configurable digital input polarity:

CL : the digital input is activated by closing the contact;

OP : the digital input is activated by opening the contact

;:/

UHO FRG

30 °C/ -22

86 °F) evaporator temperature which allows the IdF

255 min) Sets the maximum time between the end of defrost and the

ALU

255 min) Time interval between the detection of the temperature

255 min) Time delay to signal the temperature

15) Number of activation of the pressure switch, during the "did" interval,

12.0°C/ -21

21°F) allows to adjust possible offset of the

12.0°C/ -21

21°F) allows to adjust possible offsets of the

12.0°C/ -21

21°F) allows to adjust possible offsets of the

30,0°C / -22÷86°F) sets the

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