1592034020 XR77CHC EN r1.0 2019.01.31 XR77CHC 4/7
Compressor stop time before starting any defrost: (0 to 900 sec) interval with compressor
stopped before activating hot gas cycle
Display during defrost: (rt; it; SP; dF) rt = real temperature; it = start defrost temperature;
SP = SET-POINT; dF = label “dF”.
Max delay for updating display after any defrost: (0 to 255 min) delay before updating the
temperature on the display after finishing any defrost.
Draining time: (0 to 255 min)
Drain heater enabled after draining time (Fdt): (0 to 255 min) the relative output will stay on
after draining time.
First defrost after start-up: (n; Y) to enable defrost at power on.
Differential during any pre-defrost phase: (-12.0 to 12.0°C; -21 to 21°F) the regulation Set
Point is changed to a temporary different value before any defrost
Pre-defrost time: (0 to 120 min) interval with temporary Set Point before any defrost.
Defrost delay after freezing: (0.0 to 24h00min, res. 10 min) delay before activating a defrost.
Automatic defrost (at the beginning of any energy saving mode): (n; Y) n=function
disabled; Y=function enabled
Tipe of synchronized defrost: (nu; SYn; rnd) nu=not used; SYn=synchronized; rnd=random
defrost
Number of devices connected to the virtual network for random defrost (valid if
Syd=rnd): (1 to 20) used to define how many devices will use the Random Defrost Function
Probe selection for evaporator fan management: nP=no probe; P1=thermostat probe;
P2=evaporator probe; P3=do not use it; P4=Probe on Hot Key plug.
Evaporator fan stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature,
detected by evaporator probe. Over this value of temperature fans are always OFF. NOTE: it
works only for the evaporator fan, NOT for the condenser fan.
Differential for evaporator fan: (0.1 to 25.5°C; 1 to 45°F) differential for evaporator ventilator
regulator
Evaporator fan mode operation: (Cn; on; CY; oY)
• Cn = runs with the compressor, duty-cycle when compressor is OFF (see FoF, Fon,
FF1 and Fo1 parameters) and OFF during defrost
• on = continuous mode, OFF during defrost
• CY = runs with the compressor, duty-cycle when compressor is OFF (see FoF, Fon,
FF1 and Fo1 parameters) and ON during defrost
• oY = continuous mode, ON during defrost
Fan delay after defrost: (0 to 255 min) delay before fan activation after any defrosts.
Differential of temperature for forced activation of fans
Fan on time when the compressor is off: (0 to 255 min) used when energy saving status is
not active.
Fan off time when the compressor is off: (0 to 255 min) used when energy saving status is
not active.
Fan on time with compressor off in Energy Saving mode: (0 to 255 min) used when energy
saving status is active.
Fan off time with compressor off in Energy Saving mode: (0 to 255 min) used when energy
saving status is active.
Probe selection for condenser fan management: nP=no probe; P1=probe Pb1; P2=probe
Pb2; P3=probe Pb3; P4=probe Pb4 on Hot Key plug.
Condenser fan stop temperature: (-55 to 50°C; -67 to 122°F) setting of temperature,
detected by evaporator probe. Over this value of temperature fans are always OFF.
Differential for condenser fan: (0.1 to 25.5°C; 1 to 45°F) differential for evaporator ventilator
regulator
Condenser fan mode operation: (Cn; on; CY; oY)
• Cn = runs with the compressor and OFF during defrost
• on = continuous mode, OFF during defrost
• CY = runs with the compressor and ON during defrost
• oY = continuous mode, ON during defrost
AUXILIARY OUTPUT MANAGEMENT - AUS
Kind of regulation for auxiliary relay: (Ht; CL) Ht = heating; CL = cooling.
Set Point for auxiliary relay: (-55.0 to 150.0°C; -67 to 302°F) it defines the room temperature
set point to switch auxiliary relay.
Differential for auxiliary relay: (0.1 to 25.5°C; 1 to 45°F) differential for auxiliary output set
point.
• ACH=CL, AUX Cut in is [SAA+SHY]; AUX Cut out is SAA.
• ACH=Ht, AUX Cut in is [SAA–SHY]; AUX Cut out is SAA.
Probe selection for auxiliary relay: (nP; P1; P2; P3; P4) nP = no probe, the auxiliary relay is
switched only by the digital input; P1 = Probe 1 (Thermostat probe); P2 = Probe 2 (evaporator
probe); P3 = do not use it; P4 = Probe 4.
Auxiliary relay switched off during defrost: (n; Y) n = the auxiliary relay operates during
defrost. Y = the auxiliary relay is switched off during defrost.
Base Time for timed activation of auxiliary output: (SEC; Min) SEC=base time is in second
AUX output in ON state: 0 to 255 (base time defined in par. btA)
AUX output in OFF state: 0 to 255 (base time defined in par. btA)
Temperature alarms probe selection: (P1, P2, P3, P4)
Temperature alarms configuration: (Ab, rE) Ab = absolute; rE = relative.
Maximum temperature alarm: when this temperature is reached, the alarm is enabled after
the Ad delay time.
• If ALC=Ab ALL to 150.0°C or ALL to 302°F.
• If ALC=rE 0.0 to 50.0°C or 0 to 90°F.
Minimum temperature alarm: when this temperature is reached, the alarm is enabled after the
Ad delay time.
• If ALC=Ab -55.0°C to ALU or -67°F to ALU.
• If ALC=rE 0.0 to 50.0°C or 0 to 90°F.
Differential for temperature alarm recovery: (0.1 to 25.0°C; 1 to 45°F) differential for alarms.
Temperature alarm delay: (0 to 255 min) delay time between the detection of an alarm
condition and the relative alarm signalling.
Delay of temperature alarm with door open: (0.0 to 24h00min, res. 10 min) delay time
between the detection of a temperature alarm condition and the relative alarm signalling, after
powering on the instrument.
Delay of temperature alarm at start up: (0.0 to 24h00min, res. 10 min) delay time between
the detection of a temperature alarm condition and the relative alarm signalling, after powering
on the instrument.
CONDENSER TEMPERATURE ALARM - ALr
Probe selection for second temperature alarms: (nP; P1; P2; P3; P4) nP=no probe;
P1=thermostat probe; P2=evaporator probe; P3=do not use it; P4=Probe on Hot Key plug
Second high temperature pre-alarm: (-55.0 to 150.0°C; -67 to 302°F)
Differential for second temperature pre-alarm recovery: (0.1 to 25.0°C; 1 to 45°F)
Second temperature pre-alarm delay: (0 to 255 min; 255 = not used) delay time between the
detection of a condenser pre-alarm condition and the relative alarm signaling.
Second low temperature alarm: (-55.0 to 150.0°C; -67 to 302°F)
Second high temperature alarm: (-55.0 to 150.0°C; -67 to 302°F)
Differential for second temperature alarm recovery: (0.1 to 25.0°C; 1 to 45°F)
Second temperature alarm delay: (0 to 255 min; 255 = not used) delay time between the
detection of a condenser alarm condition and the relative alarm signaling.
Delay for second temperature alarm at start up: (0.0 to 24h00min, res. 10 min)
Compressor off because of second low temperature alarm: (n; Y) n = no, compressor
keeps on working; Y = yes, compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
Compressor off because of second high temperature alarm: (n; Y) n = no, compressor
keeps on working; Y = yes, compressor is switched off till the alarm is present, in any case
regulation restarts after AC time at minimum.
Differential for anti freezing control: (-12.0 to 12.0°C; -21.0 to 21.0°F) regulation sopped if
T<SET+SAF
DIGITAL OUTPUT MANAGEMENT - oUt
Alarm muting: (n; Y) to disable the (optional) buzzer and the output configured as alarm.
Output configuration: (nu; CP1; dEF; FAn; ALr; LiG; AUS; db; onF; HES; Cnd) nu=not
used; CP1=compressor; dEF=defrost; FAn=ventilators; ALr=alarm; LiG=light;
AUS=Auxiliary relay; onF=always on with instrument on; db=neutral zone; HES=night
blinds; Cnd=Condenser fan; CP2=second compressor; dF2=second defrost; HEt=heater
control; inV=do not use it.
Alarm relay polarity: (oP; CL) oP = alarm activated by closing the contact; CL = alarm
activated by opening the contact
Base time for digital inputs: (SEC; Min) SEC = seconds; Min = minutes. Delay for activating
the function linked to the digital inputs.
Digital input 1 polarity: (oP; CL) oP = activated by closing the contact; CL = activated by
opening the contact.
Digital input 1 configuration: (nu; dor; dEF; AUS; ES; EAL; bAL; PAL; FAn; HdF; onF; LiG;
CC; EMt)
• nu=not used
• dor = door switch function
• dEF = defrost activation
• AUS = auxiliary output
• ES = energy saving mode activation
• EAL = external warning alarm
• bAL = external lock alarm
• PAL = external pressure alarm
• FAn = evaporator fan control
• HdF = holiday defrost
• onF = ON/OFF status change
• LiG = light output control
• CC = change configuration (between C1 and C2)
• EMt = do not use it
Digital inputs 1 alarm delay: (0 to 255) it is the delay between the detection of an external
event and the activation of the relative function.
Digital input 2 polarity (if d.i.2 present): (oP; CL) oP = activated by closing the contact; CL =
activated by opening the contact.
Digital input 2 configuration: (nu; dor; dEF; AUS; ES; EAL; bAL; PAL; FAn; HdF; onF; LiG;
CC; EMt)
• nu=not used
• dor = door switch function
• dEF = defrost activation
• AUS = auxiliary output
• ES = energy saving mode activation
• EAL = external warning alarm
• bAL = external lock alarm
• PAL = external pressure alarm
• FAn = evaporator fan control
• HdF = holiday defrost
• onF = ON/OFF status change
• LiG = light output control
• CC = change configuration (between C1 and C2)
• EMt = Motion detector
Digital inputs 2 alarm delay: (0 to 255) it is the delay between the detection of an external
event and the activation of the relative function.
Number of external pressure alarms before stopping the regulation: (0 to 15) after
reaching nPS events in the digital input alarm delay (par. dxd) the regulation will be stopped
and a manual restart (ON/OFF, power OFF and power ON) will be required
Compressor and fan status after door opening: (no; FAn; CPr; F-C): no = normal;
FAn = Fans OFF; CPr = Compressor OFF; F-C = Compressor and fans OFF.
Regulation restart after door open alarm: (n; Y) n = no regulation if door is opened; Y = when
did is elapsed, regulation restarts even if a door open alarm is present.
Light output controlled by digital input: (0 to 255 min) a digital input event will activate the
light output and the output will stay ON for this interval
Differential for energy saving mode: (-30.0 to 30.0°C; -54 to 54°F) it sets the increasing
value of the set point during the Energy Saving cycle.
Energy saving mode controls the lights: (n; Y) lights off when energy saving mode is active
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