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CCt Thermostat override: (0.0 to 23h50min, res. 10 min) allows to set the length of the continuous
cycle. It can be used, 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 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 to 255 min) time during which the compressor is
off in case of faulty thermostat probe. With CoF=0 compressor is always active.
CH Type of action: CL = cooling; Ht = heating.
DISPLAY
CF Temperature measurement unit: °C = Celsius; °F = Fahrenheit. When the measurement unit is
changed the SET point and the values of the regulation 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.
rEd Remote display: select which probe is displayed by the remote display (T620or CX620 or
V620) (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.
dLy Display delay: (0.0 to 20min00sec; res. 10 sec) when the temperature increases, the display is
updated of 1°C or 1°F after this time.
DEFROST
dFP Probe selection for defrost termination: nP = no probe; P1 =thermostat probe; P2 =
evaporator probe; P3 =Third probe; P4 = Fourth probe.
dtE Defrost termination temperature: (-55.0 to 150.0°C; -67 to 302°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 to 120 h) determines the time interval between two defrost cycles.
MdF (Maximum) duration of defrost: (0 to 255 min) When P2P = n, no evaporator probe, it sets the
defrost duration, when P2P = y, defrost end based on temperature, it sets the maximum length
for defrost.
dFd Display during defrost:
rt = real temperature;
it = temperature reading at the defrost start;
Set = set point;
dEF = "dEF" label.
dAd Defrost display time out: (0 to 255 min) sets the maximum time between the end of defrost and
the restarting of the real room temperature display.
OA3 = AUS: AUXILIARY THERMOSTAT CONFIGURATION (terms. 22-23)
ACH Kind of regulation for auxiliary relay: Ht = heating; CL = cooling
SAA Set Point for auxiliary relay: (-55.0 to 150.0°C; -67 to 302°F) it defines the room temperature
setpoint to switch auxiliary relay.
SHy Differential for auxiliary relay: (0.1 to 25.5°C; 1 to 45°F) differential for auxiliary relay set point,
always positive.
ArP Probe selection for auxiliary: nP = aux relay is switched by digital input with i1F=AUS; P1 =
Probe 1 (Thermostat probe); P2 = Probe 2 (evaporator probe); P3 = Probe 3 (display probe);
P4 = Probe 4.
Sdd Auxiliary output status during defrost:
n = the auxiliary output is switched off during defrost;
y = the auxiliary output goes on working during defrost.
ALARMS
ALP Probe for temperature alarm setting: P1 = thermostat probe; P2 = evaporator probe; P3 =
condenser 1 probe; P4 = condenser 2 probe.
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 to 50°C or 0 to 90°F.
ALC = Ab, ALL to 150°C or ALL to 302°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 to 50°C or 0 to 90°F;
ALC = Ab, -55°C to ALU or -67°F to ALU.
When this temperature is reached and after the ALd delay time, the LA alarm is enabled.
AFH Temperature alarm and fan differential: (0.1 to 25.5°C; 1 to 45°F) differential for temperature
alarm set point and fan regulation set point, always positive.
ALd Temperature alarm delay: (0 to 255 min) time interval between the detection of an alarm
condition and the corresponding alarm signalling.
dAo Delay of temperature alarm at start-up: (0.0 to 23h50min, res. 10 min) time interval between
the detection of the temperature alarm condition after the instrument power on and the alarm
signalling.
CONDENSER TEMPERATURE ALARM
AP2 Probe selection for temperature alarm of condenser: nP = no probe; P1 = thermostat probe;
P2 = evaporator probe; P3 = third probe; P4 = fourth probe.
AL2 Low temperature alarm of condenser: (-55 to 150°C; -67 to 302°F) when this temperature is
reached the LA2 alarm is signalled (after the Ad2 delay).
Au2 High temperature alarm of condenser: (-55 to 150°C; -67 to 302°F) when this temperature is
reached the HA2 alarm is signalled (after the Ad2 delay).
AH2 Differential for temperature condenser alarm recovery: (0.1 to 25.5°C; 1 to 45°F).
Ad2 Condenser temperature alarm delay: (0 to 255 min) time interval between the detection of the
condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarm exclusion at start up: (0.0 to 23h50min, res. 10 min).
bLL Compressor off with low temperature alarm of condenser: n = compressor keeps on
working; Y = compressor is switched off till the alarm is present, in any case regulation restarts
after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser: n = compressor keeps on
working; Y = compressor is switched off till the alarm is present, in any case regulation restarts
after AC time at minimum.
1592026000 XW20K GB R2.0 08.06.2011.doc
RELAY OA3 (22-23) CONFIGURATION
tbA Alarm relay silencing (with oA3=ALr):
n = silencing disabled: alarm relay stays on till alarm condition lasts;
y = silencing enabled: alarm relay is switched OFF by pressing a key during an alarm.
oA3 Fourth relay configuration (22-23): dEF = do not select it; FAn = do not select it; ALr = alarm;
Lig = light; AuS = Auxiliary relay; onF = always on with instrument on; db = heating element for
neutral zone regulation; cP2 = second compressor; dF2 = do not select it.
AoP Alarm relay polarity: it set if the alarm relay is open or closed when an alarm happens. CL=
terminals 1-2 closed during an alarm; oP = terminals 1-2 open during an alarm.
DIGITAL INPUT
i1P Digital input polarity: oP = the digital input is activated by opening the contact; CL = the digital
input is activated by closing the contact.
i1F Digital input configuration: EAL = external alarm: "EA" message is displayed; bAL = serious
alarm "CA" message is displayed. PAL = pressure switch alarm, "CA" message is displayed; dor
= door switch function; dEF = activation of a defrost cycle; AUS =to switch on and off the 22-23
relay with oA3 = AUS; Htr = kind of action inversion (cooling – heating); FAn = not set it;
ES = Energy saving.
did Digital input delay: (0 to 255 min)
With i1F= EAL or i1F = bAL digital input alarm delay: delay between the detection of the
external alarm condition and its signalling.
With i1F= dor: door open signalling delay.
With i1F = PAL: time for pressure switch function: time interval to calculate the number of the
pressure switch activation.
nPS Pressure switch number: (0 to 15) number of activation of the pressure switch, during the did
interval, before signalling the alarm event (i2F=PAL).
If the nPS activation in the did time is reached, switch off and on the instrument to restart
normal regulation.
odC Compressor and fan status when open door: no = normal; FAn = Fan OFF; CPr =
Compressor OFF; F_C = Compressor and fan OFF.
rrd Outputs restart after doA alarm: no = outputs not affected by the doA alarm; YES = outputs
restart with the doA alarm.
HES Temperature increase during the Energy Saving cycle: (-30.0 to 30.0°C; -54 to 54°F) it sets
the increasing value of the set point during the Energy Saving cycle.
OTHER
Adr RS485 serial address: (1 to 247) identifies the instrument address when connected to a
ModBUS compatible monitoring system.
PbC Type of probe: it allows to set the kind of probe used by the instrument. PtC = PTC probe, ntC =
NTC probe.
onF on/off key enabling: nu = disabled; oFF = enabled; ES = to start a energy saving cycle.
dP3 Third probe display- optional.
dP4 Fourth probe display.
rSE Real set point: it shows the set point used during the energy saving cycle or during the
continuous cycle.
rEL Release software: (read only) Software version of the microprocessor.
Ptb Parameter table: (read only) it shows the original code of the parameter map.
9
DIGITAL INPUT
The free voltage digital input is programmable in different configurations by the "i1F" parameter.
9.1 DOOR SWITCH INPUT (I1F = DOR)
It signals the door status and the corresponding relay output status through the odC parameter: no =
normal (any change); Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter did, the door alarm is enabled,
the display shows the message "dA" and the regulation restarts is rtr = yES. The alarm stops as
soon as the external digital input is disabled again. With the door open, the high and low temperature
alarms are disabled.
9.2 GENERIC ALARM (I1F = EAL)
As soon as the digital input is activated the unit will wait for did time delay before signalling the "EAL"
alarm message. The outputs status doesn't change. The alarm stops just after the digital input is de-
activated.
9.3 SERIOUS ALARM MODE (I1F = BAL)
When the digital input is activated, the unit will wait for did delay before signalling the "CA" alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
9.4 PRESSURE SWITCH (I1F = PAL)
If during the interval time set by did parameter, the pressure switch has reached the number of
activation of the nPS parameter, the "CA" pressure alarm message will be displayed. The compressor
and the regulation are stopped. When the digital input is ON the compressor is always OFF. If the
nPS activation in the did time is reached, switch off and on the instrument to restart normal
regulation.
9.5 AUXILIARY OUTPUT SWITCHING (I1F =AUS)
With oA3=AUS and i1F=AUX it switches the fourth relay (22-23).
9.6 START DEFROST (I1F = DFR)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation will
restart only if the digital input is disabled otherwise the instrument will wait until the MdF safety time is
expired.
9.7 KIND OF ACTION: HEATING OR COOLING (I1F = HTR)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
9.8 ENERGY SAVING (I1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+HES
(parameter) sum. This function is enabled until the digital input is activated.
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