EVCO EK820AP7 User Manual

DIMENSIONAL DADIMENSIONAL DA

DIMENSIONAL DA

DIMENSIONAL DADIMENSIONAL DA

OVERALL DIMENSIONS AND PANEL CUTOUT

The dimensions are expressed in millimetres and inches (fifth-scale drawing).

ELECTRICAL CONNECTIONELECTRICAL CONNECTION

ELECTRICAL CONNECTION

ELECTRICAL CONNECTIONELECTRICAL CONNECTION

CONNECTIONS TO DERIVE

Instance of typical application.

BUILDER DABUILDER DA

BUILDER DA

BUILDER DABUILDER DA

EVCO S.r.l.

Via Mezzaterra 6, 32036 Sedico Belluno ITALY
Phone [phone] (a.r.) Fax [phone]
Internet addresses
e-mail: [e-mail]
http://www.evco.it

TO BE CAREFUL

This publication exclusively belongs to EVCO and shall not be reproduced and distributed if not expressly authorized by the same EVCO.
EVCO does not assume any responsibility in order to the characteristics, to the technical data and to the possible mistakes related herein or deriving from the use of the same.
EVCO can not be considered responsible for damages caused from the inobservance of the additional informations.
EVCO reserves the right to make any modification without prior notice and at any time without prejudice the basic functioning and safety characteristics.

TT

AA

T

A

TT

AA

Fig. 3

TT

AA

T

A

TT

AA

INSTINST

ALLAALLA

ALLA

ALLAALLA

TIONTION

TION

TIONTION

INST

INSTINST

WITH THE FIXING SYSTEM SUGGESTED BY THE BUILDER

Panel mounting, with the equipped screw brackets (fifth-scale drawing).

Fig. 4

Fig. 5

EK 820AEK 820A

EK 820A

EK 820AEK 820A

ON-OFF digital controller for quick cooler
management

Operating instructions

Version 1.01 of 30th September 2004

File ek820a_eng_v1.00.pdf

PT

IMPORTANT:

The use of this new instrument is easy; but for safety reasons, it is
important read these instructions carefully before the installation or
before the use and follow all additional informations.

It is very important keep these instructions with the instrument for future
consultations.

GENERAL INFORMAGENERAL INFORMA

GENERAL INFORMA

GENERAL INFORMAGENERAL INFORMA

WHAT IS THE USE

EK 820A is an ON-OFF digital controller studied for quick cooler management (of foods
at ambient temperature or pre-cooked) which basic characteristics are the management of
ten cycles of functioning, the one 1½ HP compressor management, the quick cooling
modality selection (for temperature or time), the needle probe proper insertion verify, the
“manual defrost and ventilation”; besides, the instrument is provided with one door
switch digital input configurable to interact on the outputs activity and with one
locking digital input configurable to interact on the instrument status.

In factory the instrument gets preset to accept at the measure inputs PTC probes used in
refrigeration field at the moment.

EK 820A is available in the 72 x 144 mm (2.83 x 5.66 in.) case and it is studied for panel
mounting with the equipped screw brackets.

GETTING STGETTING ST

GETTING ST

GETTING STGETTING ST

INSTALLATION

EK 820A was studied for panel mounting, panel cutout 67 x 138 mm (2.63 x 5.43 in.),
with the equipped screw brackets (the overall dimensions and the panel cutout are
related in Fig. 3, the fixing system suggested by the builder is related in Fig. 4).

ADDITIONAL INFORMATIONS

- the panel thickness must be included from 1 to 5 mm (0.04 to 0.19 in.)

- verify if the using conditions (ambient temperature, humidity, etc.) are within the
limits indicated by the builder (see the chapter TECHNICAL DATA)

- install the instrument in a location with a suitable ventilation, to avoid the inter­nal overheating of the instrument

- do not install the instrument near surfaces that can to obstruct the air-grating
(carpets, covers, etc.), heating sources (radiators, hot air ducts, etc.), locations
subject to direct sunlight, rain, humidity, excessive dust, mechanical vibrations
or bumps, devices with strong magnetos (microwave ovens, big speakers, etc.)

- according with the safety norms, the protection against possible contacts with
electrical parts and parts protected with functional insulation only must be ensured
through a correct installation procedure of the instrument; all parts that ensure the
protection must be fixed so that they can not be removed if not with a tool.

ELECTRICAL CONNECTION

EK 820A is provided with two extractable screw terminal blocks for cables up to 2.5 mm²
(0.38in.², for the connection to the power supply, inputs and outputs) located on the instru­ment back panel (the connections to derive are related in Fig. 5 and they are checkable on the
polyester label stuck on the instrument case).

ADDITIONAL INFORMATIONS

- if the instrument is brought from a cold to a warm location, the humidity may
condense inside the instrument; wait about an hour before supply the instrument

- verify if the operating power supply voltage, electrical frequency and power of
the instrument correspond to the local power supply (see the chapter TECHNICAL
DATA)

- do not supply more instruments with the same transformer

- if the instrument is installed on a vehicle, its power supply must be derived di­rectly from the battery of the vehicle

- give the instrument a protection able to limit the current absorbed in case of
failure

- the instrument remains connected to the local power supply as long as the termi­nals 27 and 28 are derived to the local power supply, even if the instrument is
apparently turned off

- if the instrument is supplied from low voltage use low voltage loads

- give the probes a protection able to insulate them against possible contacts with
metal parts or use insulated probes

- give the outputs a protection able to protect them against short circuit and overload

- do not try to repair the instrument; for the repairs apply to highly qualified staff

ARAR

AR

ARAR

TEDTED

TED

TEDTED

TIONSTIONS

TIONS

TIONSTIONS

- if you have any questions or problems concerning the instrument please
consult Evco (see the chapter BUILDER DATA).

USEUSE

USE

USEUSE

PRELIMINARY INFORMATIONS

After derived the connections related in Fig. 5, the instrument reproposes the last settings
stored; if a lack of power supply happens during the count of a time, when the power supply
recovers the count gets reproposed from the beginning.

Pushing and releasing the key T3 the instrument turning ON (status ON) or turning OFF
(status STAND-BY), except during the configuration parameters setting procedure; the
LED L3 is associated to the instrument status, it is turned ON during the status ON and
it is turned OFF during the status STAND-BY.

If an alarm should be active the display DY1 displays the alarm code flashing and the buzzer
utters an intermittent beep as long as the cause that has given it does not disappear (see the
chapter SIGNALS AND ALARMS); pressure on a key during an alarm permits to silence the
buzzer.

During the status STAND-BY the display DY1 displays the temperature read by the cabinet
probe and all outputs are forced to the status OFF.

EK 820A is provided with ten cycles of functioning and with some configuration
parameters that get stored in a non volatile memory and that permit to set the instrument
according with one’s requirements (see the chapter CONFIGURABILITY).

QUICK COOLING FOR TEMPERATURE CYCLE

Pushing and releasing the key T4 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L4 is associated to the quick
cooling cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle is
not selected.

Pushing and releasing the key T10 the quick cooling for temperature modality gets selected;
the LED L10 is associated to the quick cooling for temperature modality, it is turned ON when
the modality is selected and it is turned OFF when the modality is not selected.

Pushing and releasing the key T3 the cycle gets activated; the LED L1 is associated to the quick
cooling/freezing, it is turned ON when the quick cooling/freezing is running and it is turned OFF
when the quick cooling/freezing is not running.

18

ENGLISH

Fig. 1

Fig. 2

During this cycle the display DY1 displays the temperature read by the needle probe, if the
conditions permit it (the temperature read by the needle probe must be below the quick cool­ing/freezing for temperature enabling setpoint) the display DY2 displays the decrease of the
quick cooling for temperature maximum length and the LED L12 flashes to indicate that the
count of the time is running; keeping pushed the key T10 the display DY2 displays the fraction
of time passed from the moment in which the instrument activates the cycle.

The output K 1 is associated to the compressor and to the quick cooling setpoint, it remains
activated continuously as long as the temperature read by the cabinet probe reaches the quick
cooling setpoint and when it rises above the quick cooling setpoint of the hysteresis value
(differential) the output gets reactivated, except during a defrost and a dripping.

The output K 2 is associated to the evaporator fans and it is forced to the status ON, except
during a defrost cycle.

A defrost cycle provides three phases (defrost, dripping and evaporator fans stoppage) con­nected in cascade since the end of one automatically determines the passage to the following
one.

The output K 3 is associated to the defrost and it remains continuously activated during the
defrost as long as the temperature read by the evaporator probe reaches the defrost stopping
setpoint when the defrost ends and the instrument automatically moves to the dripping; if the
instrument was set to manage defrost to resistances (electrical) during a defrost the output K
1 gets forced to the status OFF and the output K 2 functioning gets established with the param­eters of the family F, if the instrument was set to manage hot gas defrost (reversal of cycle)
during a defrost the output K 1 remains continuously activated and the output K 2 functioning
gets established with the parameters of the family F, if the instrument was set to manage air
defrost (open door) during a defrost the output K 1 gets forced to the status OFF and the output
K 2 gets forced to the status ON.

Passed the dripping length from the moment of the defrost end the instrument automatically
moves to the evaporator fans stoppage; if the instrument was set to manage defrost to
resistances (electrical) or hot gas defrost (reversal of cycle) during a dripping the outputs K 1
and K 2 get forced to the status OFF, if the instrument was set to manage air defrost (open
door) during a dripping the output K 1 gets forced to the status OFF and the output K 2 gets
forced to the status ON.

Passed the evaporator fans stoppage length from the moment of the dripping end the defrost
cycle ends; if the instrument was set to manage defrost to resistances (electrical) or hot gas
defrost (reversal of cycle) during an evaporator fans stoppage the output K 2 activation gets
disabled, if the instrument was set to manage air defrost (open door) during an evaporator
fans stoppage the output K 2 gets forced to the status ON.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.
When the temperature read by the needle probe falls below the quick cooling for temperature

stopping setpoint the cycle ends and the successful quick cooling/freezing for temperature
signal gets activated; keeping pushed the key T10 the display DY1 displays the temperature
read by the cabinet probe.

Passed the quick cooling for temperature maximum length, if the temperature read by the
needle probe is above the quick cooling for temperature stopping setpoint the unsuccessful
quick cooling/freezing alarm gets activated; keeping pushed the key T10 the display DY2 dis­plays the fraction of time passed from the moment of the quick cooling for temperature maxi­mum length end.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick cooling for tem­perature cycle activation is refused

- for the whole period of a locking digital input alarm the quick cooling for tempera­ture cycle activation is refused

- for the whole period of a needle probe failure alarm the quick cooling for tempera­ture cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick cooling for tempera­ture cycle activation is refused

- for the whole period of a door switch digital input alarm the quick cooling for tem­perature cycle activation is refused

- during a quick cooling for temperature cycle the instrument never automatically
presents a request of a defrost cycle, except what established with the parameter
d4.

QUICK COOLING FOR TIME CYCLE

Pushing and releasing the key T4 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L4 is associated to the quick
cooling cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle is
not selected.

Pushing and releasing the key T10 the quick cooling for time modality gets selected; the LED
L11 is associated to the quick cooling for time modality, it is turned ON when the modality is
selected and it is turned OFF when the modality is not selected.

To modify the quick cooling for time length push and release over and over the key T1 or T2 as
long as the display DY2 displays the desired value (keeping pushed the key T1 or T2 the value
gets decreased or increased more quickly).

Pushing and releasing the key T3 the cycle gets activated; the LED L1 is associated to the quick
cooling/freezing, it is turned ON when the quick cooling/freezing is running and it is turned OFF
when the quick cooling/freezing is not running.

During this cycle the display DY1 displays the temperature read by the cabinet probe, the
display DY2 displays the decrease of the quick cooling for time length and the LED L12 flashes
to indicate that the count of the time is running; keeping pushed the key T10 the display DY2
displays the fraction of time passed from the moment in which the instrument activates the
cycle.

The outputs K 1, K 2 and K 3 get activated with the same functioning saw in the case of quick
cooling for temperature cycle.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.
Passed the quick cooling for time length the cycle ends and the quick cooling/freezing for time

ended signal gets activated.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick cooling for time
cycle activation is refused

- for the whole period of a locking digital input alarm the quick cooling for time cycle
activation is refused

- for the whole period of a cabinet probe failure alarm the quick cooling for time
cycle activation is refused

- for the whole period of a door switch digital input alarm the quick cooling for time
cycle activation is refused

- during a quick cooling for time cycle the instrument never automatically presents a
request of a defrost cycle, except what established with the parameter d4.

QUICK FREEZING FOR TEMPERATURE CYCLE

Pushing and releasing the key T5 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L5 is associated to the quick
freezing cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle is
not selected.

Pushing and releasing the key T10 the quick freezing for temperature modality gets selected;
the LED L10 is associated to the quick freezing for temperature modality, it is turned ON when
the modality is selected and it is turned OFF when the modality is not selected.

Pushing and releasing the key T3 the cycle gets activated; the LED L1 is associated to the quick
cooling/freezing, it is turned ON when the quick cooling/freezing is running and it is turned OFF
when the quick cooling/freezing is not running.

During this cycle the display DY1 displays the temperature read by the needle probe, if the
conditions permit it (the temperature read by the needle probe must be below the quick cool­ing/freezing for temperature enabling setpoint) the display DY2 displays the decrease of the
quick freezing for temperature maximum length and the LED L12 flashes to indicate that the
count of the time is running; keeping pushed the key T10 the display DY2 displays the fraction
of time passed from the moment in which the instrument activates the cycle.

The output K 1 is associated to the compressor and to the quick freezing setpoint, it remains
activated continuously as long as the temperature read by the cabinet probe reaches the quick
freezing setpoint and when it rises above the quick freezing setpoint of the hysteresis value
(differential) the output gets reactivated, except during a defrost and a dripping.

The outputs K 2 and K 3 get activated with the same functioning saw in the case of quick
cooling for temperature cycle.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.
When the temperature read by the needle probe falls below the quick freezing for temperature

stopping setpoint the cycle ends and the successful quick cooling/freezing for temperature
signal gets activated; keeping pushed the key T10 the display DY1 displays the temperature
read by the cabinet probe.

Passed the quick freezing for temperature maximum length, if the temperature read by the
needle probe is above the quick freezing for temperature stopping setpoint the unsuccessful
quick cooling/freezing alarm gets activated; keeping pushed the key T10 the display DY2 dis­plays the fraction of time passed from the moment of the quick freezing for temperature maxi­mum length end.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick freezing for tem­perature cycle activation is refused

- for the whole period of a locking digital input alarm the quick freezing for tempera­ture cycle activation is refused

- for the whole period of a needle probe failure alarm the quick freezing for tempera­ture cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick freezing for tempera­ture cycle activation is refused

- for the whole period of a door switch digital input alarm the quick freezing for
temperature cycle activation is refused

- during a quick freezing for temperature cycle the instrument never automatically
presents a request of a defrost cycle, except what established with the parameter
d4.

QUICK FREEZING FOR TIME CYCLE

Pushing and releasing the key T5 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L5 is associated to the quick
freezing cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle is
not selected.

Pushing and releasing the key T10 the quick freezing for time modality gets selected; the LED
L11 is associated to the quick freezing for time modality, it is turned ON when the modality is
selected and it is turned OFF when the modality is not selected.

To modify the quick freezing for time length push and release over and over the key T1 or T2 as
long as the display DY2 displays the desired value (keeping pushed the key T1 or T2 the value
gets decreased or increased more quickly).

Pushing and releasing the key T3 the cycle gets activated; the LED L1 is associated to the quick
cooling/freezing, it is turned ON when the quick cooling/freezing is running and it is turned OFF
when the quick cooling/freezing is not running.

During this cycle the display DY1 displays the temperature read by the cabinet probe, the
display DY2 displays the decrease of the quick freezing for time length and the LED L12 flashes
to indicate that the count of the time is running; keeping pushed the key T10 the display DY2
displays the fraction of time passed from the moment in which the instrument activates the
cycle.

The outputs K 1, K 2 and K 3 get activated with the same functioning saw in the case of quick
freezing for temperature cycle.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.
Passed the quick freezing for time length the cycle ends and the quick cooling/freezing for time

2 7

ended signal gets activated.

If the LED L9 flashes it means that the needle probe proper insertion verify is running.
If the LED L12 flashes it means that the count of a time is running.
If the display DY1 displays the indication “dEF” and the LED L6 is turned ON it means that a

defrost cycle is running.
If the display DY1 displays the indication “dEF” flashing and the LED L6 is turned ON it means

that a count of a delay time to a defrost cycle activation is running (see the parameters C0, C1
and C2).

If the display DY1 displays the indication “End” flashing and the buzzer utters an intermittent
beep for some seconds (successful quick cooling/freezing for temperature) it means that a
quick cooling/freezing for temperature cycle/phase positively is successful; the outputs K 1, K
2 and K 3 gets forced to the status OFF.

If the display DY1 displays the indication “End” flashing, the display DY2 displays the indica­tion “0” and the buzzer utters an intermittent beep for some seconds (quick cooling/freezing
for time ended) it means that a quick cooling/freezing for time cycle/phase ended; the outputs
K 1, K 2 and K 3 gets forced to the status OFF.

ALARMS

If the display DY1 displays the indication “E2” flashing and the buzzer utters an intermittent
beep (corrupted memory data alarm) it means that there is a corruption of the configuration
data in the memory (turn OFF and turn ON again the instrument: if to the turning ON again the
alarm does not disappear the instrument must be replaced); during this alarm a cycle activation
is refused, if a cycle is running the cycle ends, the access to the configuration parameters
setting procedure is refused and all outputs get forced to the status OFF.

If the display DY1 displays the indication “E4” flashing alternated to the temperature read by
the cabinet/needle probe and the buzzer utters an intermittent beep (locking digital input
alarm) it means that the locking digital input is active (deactivate the locking digital input and
turn OFF and turn ON again the instrument, see the parameter u3); during this alarm a cycle
activation is refused and all outputs get forced to the status OFF.

If the display DY1 displays the indication “E0” flashing and the buzzer utters an intermittent
beep (cabinet probe failure alarm) it means that: the kind of connected cabinet probe is not
proper (verify the kind of connected cabinet probe), the cabinet probe is faulty (verify the
cabinet probe integrity), there is a mistake in the instrument-cabinet probe connection (verify
the instrument-cabinet probe connection integrity), the temperature read by the cabinet probe
is outside the limits permitted by the cabinet probe in use (verify that the temperature near the
cabinet probe be inside the limits permitted by the cabinet probe); during this alarm a quick
cooling/freezing cycle/phase activation is refused, if a quick cooling/freezing cycle/phase is
running the quick cooling/freezing cycle/phase ends, if a storing cycle/phase is running the
output K 1 functioning gets established with the parameters C5, C6 and C7, if a defrost cycle is
running the defrost cycle ends and the instrument never activates a defrost cycle.

If the display DY1 displays the indication “E3” flashing alternated to the temperature read by
the cabinet probe and the buzzer utters an intermittent beep (needle probe failure alarm) it
means that there is one of the faults saw in the previous case but referred to the needle probe;
during this alarm a quick cooling/freezing for temperature cycle/phase activation is refused.

If the display DY1 displays the indication “E1” flashing alternated to the temperature read by
the cabinet/needle probe and the buzzer utters an intermittent beep (evaporator probe failure
alarm) it means that there is one of the faults saw in the previous case but referred to the
evaporator probe; during this alarm if a storing cycle/phase is running and the parameter F0
has value 0 the output K 2 gets forced to the status OFF, if a defrost is running the defrost ends
and the instrument never activates a defrost cycle.

If the display DY1 displays the indication “]-[” flashing alternated to the temperature read by
the cabinet probe (door switch digital input alarm) it means that the door switch digital input
is active (deactivate the door switch digital input, see the parameters u0 and u2); during this
alarm a cycle activation is refused and gets given the action established with the parameter u0.

If the display DY1 displays the indication “]-[” flashing alternated to the temperature read by
the cabinet/needle probe and the buzzer utters an intermittent beep (door switch digital input
alarm) it means that the door switch digital input is active (deactivate the door switch digital
input, see the parameters u0, u1 and u2); during this alarm gets given the action established
with the parameters u0 and u1.

If the display DY1 displays the indication “dEF” alternated to the indication “]-[” and the buzzer
utters an intermittent beep (door switch digital input alarm during a defrost cycle) it means
that the door switch digital input is active during a defrost cycle and that the instrument was
set to manage defrost to resistances (electrical) or hot gas defrost (reversal of cycle) (deactivate
the door switch digital input, see the parameters u0, u1 and u2); during this alarm gets given
the action established with the parameters u0 and u1.

If the display DY1 displays the indication “dEF” alternated to the indication “]-[” (door switch
digital input alarm during a defrost cycle) it means that the door switch digital input is active
during a defrost cycle and that the instrument was set to manage air defrost (open door) (de­activate the door switch digital input, see the parameters u0 and u2); during this alarm gets
given the action established with the parameter u0.

If the display DY1 displays the indication “o--” flashing and the buzzer utters an intermittent
beep (unsuccessful needle probe proper insertion verify) it means that the needle probe
proper insertion verify is unsuccessful (turn OFF and turn ON again the instrument, see the
parameters c7 and CE); during this alarm the outputs K 1, K 2 and K 3 get forced to the status
OFF.

If the display DY1 displays the temperature read by the needle probe, the display DY2 displays
the indication “0” flashing and the buzzer utters an intermittent beep (unsuccessful quick
cooling/freezing) it means that a quick cooling/freezing cycle/phase is unsuccessful (see the
parameters c1 and c2 or c4 and c5); inactive.

If the display DY1 displays the indication “End” flashing, the display DY2 displays the indica­tion “---” flashing and the buzzer utters an intermittent beep (quick cooling/freezing ended
but unsuccessful) it means that a quick cooling/freezing cycle/phase is ended but it is unsuc­cessful (see the parameters c1 and c2 or c4 and c5); during this alarm the outputs K 1, K 2 and
K 3 gets forced to the status OFF.

If the display DY1 displays the temperature read by the cabinet probe, the display DY2 displays
the indication “---” flashing and the buzzer utters an intermittent beep (quick cooling/freezing
ended but unsuccessful and storing activated) it means that a quick cooling/freezing phase
is ended but it is unsuccessful and that the instrument automatically moved to the storing
phase (see the parameters c1 and c2 or c4 and c5); inactive.

If the display DY1 displays the indication “AL” alternated to the temperature read by the cabi­net probe and the buzzer utters an intermittent beep (temperature alarm) it means that the

temperature read by the cabinet probe is outside the limit established with the parameter
A1 or A2 or A3 or A4 (see the parameters A0, A1, A2, A3 and A4); inactive.

ADDITIONAL INFORMATIONS

- the alarm codes are related in order of precedence.

TECHNICAL DATECHNICAL DA

TECHNICAL DA

TECHNICAL DATECHNICAL DA

TECHNICAL DATA
Case: plastic black (PP0), self-extinguishing.
Size: 72 x 144 x 79 mm (2.83 x 5.66 x 3.11 in.), with terminal

Installation: panel mounting, panel cutout 67 x 138 mm (2.63 x 5.43

Type of protection: IP 54.
Connections: extractable screw terminal blocks with pitch 7.5 mm (0.29

Ambient temperature: from 0 to +60 °C (+32 to +140 °F, 10 ... 90 % of not con-

Power supply: 230 Vac, 50/60 Hz, 4 VA.
Insulation class: II.
Alarm buzzer: incorporated.
Measure inputs: 3 (cabinet, evaporator and needle probe) for PTC probes.
Digital inputs: 2 (5 V, 1 mA) of which one door switch configurable to

Working range: from -50 a +150 °C.
Setting range: from -55 to +99 °C.
Timer setting range: from 1 to 400 min. for the quick cooling/freezing for temperature,

Resolution: 1 °C.
Display: two 3-digit display 12.5 mm (0.49 in.) high red LED dis-

Outputs: four relays of which one 16 (2) A @ 250 Vac relay for one

Kind of defrost managed: to resistances (electrical), to hot gas (reversal of cycle), and

Defrost management: for interval, stopping temperature and maximum length.

HOW TO ORDERHOW TO ORDER

HOW TO ORDER

HOW TO ORDERHOW TO ORDER

CODING SYSTEM
Instrument name: EK 820A.
Desired measure input: P (for PTC probes).
Desired power supply: 220 (230 Vac).

6 3

TT

AA

T

A

TT

AA

blocks.

in.), with the equipped screw brackets.

in., power supply and outputs) and with pitch 5 mm (0.19
in., inputs) for cables up to 2.5 mm² (0.38 in.²).

densing relative humidity).

interact on the outputs activity and for NO or NC contact
and one locking configurable to interact on the instrument
status and for NO or NC contact.

from 0 to 999 min. for the quick cooling/freezing for time.

play with automatic minus sign, functioning status indica­tors, programming status indicators.

1½ HP @ 250 Vac compressor (NO contact) management
and three 6 (2) A @ 250 Vac relays for evaporator fans (NO
contact), defrost system (change-over contact) manage­ment and for cabinet light (NO contact) control.

to air (open door) automatic and manual.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick freezing for time
cycle activation is refused

- for the whole period of a locking digital input alarm the quick freezing for time
cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick freezing for time
cycle activation is refused

- for the whole period of a door switch digital input alarm the quick freezing for time
cycle activation is refused

- during a quick freezing for time cycle the instrument never automatically presents
a request of a defrost cycle, except what established with the parameter d4.

COLD STORING CYCLE

Pushing and releasing the key T7 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L7 is associated to the cold
storing cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle is
not selected.

Pushing and releasing the key T3 the cycle gets activated; the LED L2 is associated to the
storing, it is turned ON when the storing is running and it is turned OFF when the storing is not
running.

During this cycle the display DY1 displays the temperature read by the cabinet probe.
The output K 1 is associated to the compressor and to the cold storing setpoint, it remains

activated continuously as long as the temperature read by the cabinet probe reaches the cold
storing setpoint and when it rises above the cold storing setpoint of the hysteresis value (dif­ferential) the output gets reactivated, except during a defrost and a dripping.

The output K 2 is associated to the evaporator fans and to the output deactivation setpoint, it
remains continuously activated as long as the temperature read by the evaporator probe reaches
the output deactivation setpoint and when it falls below the output deactivation setpoint of the
hysteresis value (differential) the output gets reactivated, except during a defrost cycle.

Passed the defrost interval from the moment in which the instrument activates the cycle or
from the moment in which the instrument presents a request of a defrost cycle, if the condi­tions permit it (the temperature read by the evaporator probe must be below the defrost stop­ping setpoint) the instrument automatically presents the following request of a defrost cycle.

A defrost cycle provides three phases (defrost, dripping and evaporator fans stoppage) con­nected in cascade since the end of one automatically determines the passage to the following
one.

The output K 3 is associated to the defrost and it remains continuously activated during the
defrost as long as the temperature read by the evaporator probe reaches the defrost stopping
setpoint when the defrost ends and the instrument automatically moves to the dripping; if the
instrument was set to manage defrost to resistances (electrical) during a defrost the output K
1 gets forced to the status OFF and the output K 2 functioning gets established with the param­eters of the family F, if the instrument was set to manage hot gas defrost (reversal of cycle)
during a defrost the output K 1 remains continuously activated and the output K 2 functioning
gets established with the parameters of the family F, if the instrument was set to manage air
defrost (open door) during a defrost the output K 1 gets forced to the status OFF and the output
K 2 gets forced to the status ON.

Passed the dripping length from the moment of the defrost end the instrument automatically
moves to the evaporator fans stoppage; if the instrument was set to manage defrost to
resistances (electrical) or hot gas defrost (reversal of cycle) during a dripping the outputs K 1
and K 2 get forced to the status OFF, if the instrument was set to manage air defrost (open
door) during a dripping the output K 1 gets forced to the status OFF and the output K 2 gets
forced to the status ON.

Passed the evaporator fans stoppage length from the moment of the dripping end the defrost
cycle ends; if the instrument was set to manage defrost to resistances (electrical) or hot gas
defrost (reversal of cycle) during an evaporator fans stoppage the output K 2 activation gets
disabled, if the instrument was set to manage air defrost (open door) during an evaporator
fans stoppage the output K 2 gets forced to the status ON.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the cold storing cycle acti­vation is refused

- for the whole period of a locking digital input alarm the cold storing cycle activa­tion is refused

- for the whole period of a door switch digital input alarm the cold storing cycle
activation is refused.

VERY COLD STORING CYCLE

Pushing and releasing the key T8 during the status STAND-BY the cycle gets selected, except
during the configuration parameters setting procedure; the LED L8 is associated to the very
cold storing cycle, it is turned ON when the cycle is selected and it is turned OFF when the cycle
is not selected.

Pushing and releasing the key T3 the cycle gets activated; the LED L2 is associated to the
storing, it is turned ON when the storing is running and it is turned OFF when the storing is not
running.

During this cycle the display DY1 displays the temperature read by the cabinet probe.
The output K 1 is associated to the compressor and to the very cold storing setpoint, it remains

activated continuously as long as the temperature read by the cabinet probe reaches the very
cold storing setpoint and when it rises above the very cold storing setpoint of the hysteresis
value (differential) the output gets reactivated, except during a defrost and a dripping.

The outputs K 2 and K 3 get activated with the same functioning saw in the case of cold storing
cycle.

Activating the door switch digital input the instrument interacts on the outputs activity accord­ing what established with the parameters of the family u.

Activating the locking digital input the locking digital input alarm gets activated.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the very cold storing cycle

activation is refused

- for the whole period of a locking digital input alarm the very cold storing cycle
activation is refused

- for the whole period of a door switch digital input alarm the very cold storing cycle
activation is refused.

QUICK COOLING FOR TEMPERATURE AND COLD STORING CYCLE

Pushing and releasing the keys T4 and T7 during the status STAND-BY the cycle gets selected,
except during the configuration parameters setting procedure; the LED L4 and L7 are associ­ated to the quick cooling and cold storing cycle, they are turned ON when the cycle is selected
and they are turned OFF when the cycle is not selected.

Ended the quick cooling for temperature phase the instrument automatically moves to the cold
storing phase.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick cooling for tem­perature and cold storing cycle activation is refused

- for the whole period of a locking digital input alarm the quick cooling for tempera­ture and cold storing cycle activation is refused

- for the whole period of a needle probe failure alarm the quick cooling for tempera­ture and cold storing cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick cooling for tempera­ture and cold storing cycle activation is refused

- for the whole period of a door switch digital input alarm the quick cooling for tem­perature and cold storing cycle activation is refused.

QUICK COOLING FOR TIME AND COLD STORING CYCLE

Pushing and releasing the keys T4 and T7 during the status STAND-BY the cycle gets selected,
except during the configuration parameters setting procedure; the LED L4 and L7 are associ­ated to the quick cooling and cold storing cycle, they are turned ON when the cycle is selected
and they are turned OFF when the cycle is not selected.

Ended the quick cooling for time phase the instrument automatically moves to the cold storing
phase.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick cooling for time
and cold storing cycle activation is refused

- for the whole period of a locking digital input alarm the quick cooling for time and
cold storing cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick cooling for time and
cold storing cycle activation is refused

- for the whole period of a door switch digital input alarm the quick cooling for time
and cold storing cycle activation is refused.

QUICK FREEZING FOR TEMPERATURE AND VERY COLD STORING CYCLE

Pushing and releasing the keys T5 and T8 during the status STAND-BY the cycle gets selected,
except during the configuration parameters setting procedure; the LED L5 and L8 are associ­ated to the quick freezing and very cold storing cycle, they are turned ON when the cycle is
selected and they are turned OFF when the cycle is not selected.

Ended the quick freezing for temperature phase the instrument automatically moves to the
very cold storing phase.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick freezing for tem­perature and very cold storing cycle activation is refused

- for the whole period of a locking digital input alarm the quick freezing for tempera­ture and very cold storing cycle activation is refused

- for the whole period of a needle probe failure alarm the quick freezing for tempera­ture and very cold storing cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick freezing for tempera­ture and very cold storing cycle activation is refused

- for the whole period of a door switch digital input alarm the quick freezing for
temperature and very cold storing cycle activation is refused.

QUICK FREEZING FOR TIME AND VERY COLD STORING CYCLE

Pushing and releasing the keys T5 and T8 during the status STAND-BY the cycle gets selected,
except during the configuration parameters setting procedure; the LED L5 and L8 are associ­ated to the quick freezing and very cold storing cycle, they are turned ON when the cycle is
selected and they are turned OFF when the cycle is not selected.

Ended the quick freezing for time phase the instrument automatically moves to the very cold
storing phase.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the quick freezing for time
and very cold storing cycle activation is refused

- for the whole period of a locking digital input alarm the quick freezing for time and
very cold storing cycle activation is refused

- for the whole period of a cabinet probe failure alarm the quick freezing for time and
very cold storing cycle activation is refused

- for the whole period of a door switch digital input alarm the quick freezing for time
and very cold storing cycle activation is refused.

NEEDLE PROBE PROPER INSERTION VERIFY

Pushing and releasing the key T9 during the status STAND-BY the needle probe proper inser­tion verify gets selected or unselected, except during the configuration parameters setting
procedure; the LED L9 is associated to the needle probe proper insertion verify, it is turned ON
when the verify is not selected, it is turned OFF when the verify is selected and it flashes when
the verify is running.

Pushing and releasing the key T3 the verify gets activated.
Passed the needle probe proper insertion verify length from the moment in which the instru-

ment activates a quick cooling/freezing for temperature cycle/phase, if the temperature read
by the needle probe is above the needle probe proper insertion verify stopping setpoint the

instrument automatically moves to the quick cooling/freezing for temperature cycle/phase, if
the temperature read by the needle probe is below the needle probe proper insertion verify
stopping setpoint the unsuccessful needle probe proper insertion verify alarm gets activated.

ADDITIONAL INFORMATIONS

- the needle probe proper insertion verify has significance exclusively if a quick
cooling/freezing for temperature cycle/phase is selected.

MANUAL DEFROST

Pushing and releasing the key T6 during the status STAND-BY the presentation of a request of
a defrost cycle gets selected or unselected, except during the configuration parameters setting
procedure; the LED L6 is associated to the defrost cycle, during the status ON it is turned ON
when the cycle is running and it is turned OFF when the cycle is not running and during the
status STAND-BY it flashes when the presentation of a request of a defrost cycle is selected.

If the conditions permit it (the temperature read by the evaporator probe must be below the
defrost stopping setpoint) pushing and releasing the key T3 the instrument presents a request
of a defrost cycle.

During a storing cycle/phase, if the conditions permit it (the temperature read by the evapora­tor probe must be below the defrost stopping setpoint) keeping pushed the key T6 for four
seconds at least the instrument presents a request of a defrost cycle.

During a defrost cycle keeping pushed the key T6 for four seconds at least the defrost cycle
ends.

MANUAL VENTILATION

Keeping pushed the key T6 for four seconds at least during the status STAND-BY the output K
2 gets activated or deactivated, except during the configuration parameters setting procedure;
the LED L6 is associated to the output status, during the status STAND-BY it is turned ON when
the output is activated and it is turned OFF when the output is deactivated.

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the output K 2 activation is
refused

- for the whole period of a locking digital input alarm the output K 2 activation is
refused.

CONFIGURATION PARAMETERS SETTING

Configuration parameters are arranged on two levels, to protect the most tricky settings against
undesirable violations and they are arranged in families that can be recognized through the
initial letter of the label.

To gain access to the first level keep pushed at the same time for four seconds at least the keys

T1 and T2 during the status STAND-BY (passed four seconds the display DY1 displays the label
PA).

To select a parameter of the first level push and release over and over the key T1 or T2 as long
as the display DY1 displays the label of the desired parameter.

To modify the parameter value keep pushed the key T3 (the display DY1 displays the actual
value) and at the same time push and release over and over the key T1 or T2 as long as the
display DY1 displays the desired value (keeping pushed the key T1 or T2 the value gets de­creased or increased more quickly); after the modification release the key T3 last (to the
release of the key T3 the display DY1 displays the label of the parameter again).

To gain access to the second level enter inside the first level and select the label PA.
Keep pushed the key T3 (the display DY1 displays the actual value) and at the same time push

and release over and over the key T1 or T2 as long as the display DY1 displays -19 (keeping
pushed the key T1 or T2 the value gets decreased or increased more quickly): after the modi­fication release the key T3 last (to the release of the key T3 the display DY1 displays the label
PA again); keep pushed at the same time for four seconds at least the keys T1 and T2 (passed
four seconds the display DY1 displays the first parameter of the second level).

To select a parameter of the second level push and release over and over the key T1 or T2 as
long as the display DY1 displays the label of the desired parameter.

To modify the parameter value keep pushed the key T3 (the display DY1 displays the actual
value) and at the same time push and release over and over the key T1 or T2 as long as the
display DY1 displays the desired value (keeping pushed the key T1 or T2 the value gets de­creased or increased more quickly); after the modification release the key T3 last (to the
release of the key T3 the display DY1 displays the label of the parameter again).

To turn out from the configuration parameters setting procedure keep pushed at the same time
for four seconds at least the keys T1 and T2 or do not operate with the keys for fifty seconds
at least (time-out exit).

ADDITIONAL INFORMATIONS

- for the whole period of a corrupted memory data alarm the access to the configura­tion parameters setting procedure is refused

- the modification of a parameter value which unit of measure is the hour or the
minute or the second has not immediate effect; to obtain this effect it must not be
executed during the course of the value

- the configuration parameters values get stored in a non volatile memory even if a
lack of power supply happens.

CONFIGURABILITYCONFIGURABILITY

CONFIGURABILITY

CONFIGURABILITYCONFIGURABILITY

QUICK COOLING FOR TIME

LABEL MIN. MAX. U.M. ST. QUICK COOLING FOR TIME

0 999 min. 90 quick cooling/freezing for time length

It establishes the quick cooling/freezing for time cycle/phase length.

CONFIGURATION PARAMETERS

LABEL MIN. MAX. U.M. ST. MEASURE INPUTS
/1 -10 +10 °C 0 calibration (§)

It establishes a threshold to add algebraically to the signal coming from the cabinet probe (for
instance to correct the signal).

LABEL MIN. MAX. U.M. ST. QUICK COOLING AND STORING REGULATOR
c0 +1 +15 °C +2 hysteresis (differential) (§)

It establishes the hysteresis (differential) relative to the parameters c3, c6, cb and cC.

c1 1 400 min. 90 quick cooling for temperature maximum length (§)

It establishes the quick cooling for temperature cycle/phase maximum length.
Passed the quick cooling for temperature maximum length, if the temperature read by the

needle probe is above the setpoint established with the parameter c2 the unsuccessful quick
cooling/freezing alarm gets activated.

c2 -55 +99 °C +10 quick cooling for temperature stopping setpoint (§)

It establishes the temperature to which a quick cooling for temperature cycle/phase gets stopped
and it is referred to the needle probe.

c3 -55 +99 °C +3 cold storing setpoint (§)

It establishes the temperature associated to the output K 1 during a cold storing cycle/phase.

c4 1 400 min. 270 quick freezing for temperature maximum length (§)

It establishes the quick freezing for temperature cycle/phase maximum length.
Passed the quick freezing for temperature maximum length, if the temperature read by the

needle probe is above the setpoint established with the parameter c5 the unsuccessful quick
cooling/freezing alarm gets activated.

c5 -55 +99 °C -18 quick freezing for temperature stopping setpoint (§)

It establishes the temperature to which a quick freezing for temperature cycle/phase gets
stopped and it is referred to the needle probe.

c6 -55 +99 °C -25 very cold storing setpoint (§)

It establishes the temperature associated to the output K 1 during a very cold storing cycle/
phase.

c7 0 +99 °C +30 needle probe proper insertion verify stopping setpoint

It establishes the temperature to which a needle probe proper insertion verify gets stopped and
it is referred to the needle probe.

c8 -55 +99 °C +65 quick cooling/freezing for temperature enabling setpoint

It establishes the temperature below which it is possible to decrease the times established
with the parameters c1 and c4 and it is referred to the needle probe.

c9 0 99 sec. 3 buzzer activation length at the quick cooling/freezing end

It establishes the buzzer activation length at the successful quick cooling/freezing for tempera­ture cycle/phase end and at the quick cooling/freezing for time cycle/phase end.

cA --- --- °C --- needle probe reading (§)

It permits to display the temperature read by the needle probe.

cb -55 +99 °C -10 quick cooling setpoint (§)

It establishes the temperature associated to the output K 1 during a quick cooling cycle/phase.

cC -55 +99 °C -55 quick freezing setpoint (§)

It establishes the temperature associated to the output K 1 during a quick freezing cycle/phase.

cE 1 99 sec. 35 needle probe proper insertion verify length

It establishes the needle probe proper insertion verify length.
Passed the needle probe proper insertion verify length from the moment in which the instru-

ment activates a quick cooling/freezing for temperature cycle/phase, if the temperature read
by the needle probe is below the setpoint established with the parameter c7 the unsuccessful
needle probe proper insertion verify alarm gets activated.

LABEL MIN. MAX. U.M. ST. OUTPUT K 1 PROTECTION
C0 0 99 min. 0 disabling time to the output activation from the instru-

It establishes the time that disables the output activation from the moment in which the instru­ment gets supplied.

C1 0 99 min. 0 disabling time to the output activation from the previous

It establishes the time that disables the output activation from the moment of the previous
output activation.

C2 0 99 min. 0 disabling time to the output activation from the previous

It establishes the time that disables the output activation from the moment of the previous
output deactivation.

C5 0 99 min. 10 cycle time for the output activation during the storing

It establishes the cycle time for the output activation due to the contribution established with
the parameters C6 and C7 during a storing cycle/phase during a cabinet probe failure alarm.

C6 0 99 min. 3 output activation length in the course of the cycle time

It establishes the output activation length in the course of the cycle time established with the
parameter C5 during a cold storing cycle/phase during a cabinet probe failure alarm, except
what established with the disabling times to the output K 1 activation.

C7 0 99 min. 8 output activation length in the course of the cycle time

It establishes the output activation length in the course of the cycle time established with the
parameter C5 during a very cold storing cycle/phase during a cabinet probe failure alarm,
except what established with the disabling times to the output K 1 activation.

LABEL MIN. MAX. U.M. ST. DEFROST REGULATOR
d0 0 99 (*) 8 defrost interval

It establishes the time interval that pass from the moment in which the instrument activates a
storing cycle/phase or from the moment in which the instrument presents a request of a
defrost cycle to the moment in which the instrument automatically presents the following
request of a defrost cycle.

If the parameter d0 has value 0 the instrument never automatically presents a request of a
defrost cycle, except what established with the parameter d4.

d1 0 2 --- 1 kind of defrost

It establishes the kind of defrost that the instrument must manage, as indicated:
0 = to resistances (electrical)

4 5

1 = to hot gas (reversal of cycle)

(§)

ment start

activation

deactivation

during a cabinet probe failure alarm

during the cold storing during a cabinet probe failure
alarm

during the very cold storing during a cabinet probe fail­ure alarm

2 = to air (open door).

d2 -55 +99 °C +2 defrost stopping setpoint

It establishes the temperature to which a defrost gets stopped and it is referred to the evapo­rator probe.

d3 1 99 (*) 30 defrost maximum length

It establishes the defrost maximum length.
Passed the defrost maximum length from the moment in which the instrument activates a

defrost cycle, if the temperature read by the evaporator probe is below the setpoint established
with the parameter d2 the defrost ends.

d4 0 1 --- 0 defrost cycle at the quick cooling/freezing activation

It establishes if the instrument automatically must present a request of a defrost cycle in the
moment in which the instrument activates a quick cooling/freezing cycle/phase, as indicated:
0 = inactive
1 = the instrument automatically presents a request of a defrost cycle in the moment in

which the instrument activates a quick cooling/freezing cycle/phase.

d7 0 99 (*) 2 dripping length

It establishes the dripping length.

d9 0 1 --- 0 disabling times to the output K 1 activation override

It is significant exclusively if the parameter d1 has value 1, it establishes if to clear the disa­bling times to the output K 1 activation in the moment in which the instrument presents a
request of a defrost cycle, as indicated:
0 = inactive
1 = in the moment in which the instrument presents a request of a defrost cycle the

disabling times to the output K 1 activation get cleared.

dA --- --- °C --- evaporator probe reading (§)

It permits to display the temperature read by the evaporator probe.

db 0 1 --- 0 times base for the parameters d0, d3, d7 and F5

It establishes the unit of measure of the parameters d0, d3, d7 and F5, as indicated:
0 = the unit of measure of the parameter d0 is the hour and the unit of measure of the

parameters d3, d7 and F5 is the minute

1 = the unit of measure of the parameter d0 is the minute and the unit of measure of the

parameters d3, d7 and F5 is the second.

LABELMIN. MAX. U.M. ST. EVAPORATOR FANS REGULATOR ASSOCIATED TO THE

F0 0 1 --- 0 output functioning

It is significant exclusively during a storing cycle/phase and during a defrost if the parameter
d1 has value 0 or 1, it establishes the output functioning, as indicated:
0 = the output is associated to the setpoint established with the parameter F1, it remains

continuously activated as long as the temperature read by the evaporator probe reaches
the setpoint established with the parameter F1 and when it falls below the setpoint
established with the parameter F1 of the hysteresis value (differential) established with
the parameter F2 the output gets reactivated, except what established with the
parameters d7, F3, F4 and F5

1 = the output gets forced to the status ON, except what established with the parameters d7,

F3, F4 and F5.

F1 -55 +99 °C -1 output deactivation setpoint

It is significant exclusively if the parameter F0 has value 0, it establishes the temperature to
which the output gets deactivated and it is referred to the evaporator probe.

F2 +1 +15 °C +1 hysteresis (differential)

It is significant exclusively if the parameter F0 has value 0, it establishes the hysteresis (differ­ential) relative to the parameter F1.

F3 0 1 --- 1 output typology

It is significant exclusively during a storing cycle/phase, it establishes a bond with the output K
1 status, as indicated:
0 = inactive
1 = during the status OFF of the output K 1 the output gets forced to the status OFF.

F4 0 1 --- 1 output forced to the status OFF during the defrost

It is significant exclusively if the parameter d1 has value 0 or 1, it establishes if to force the
output to the status OFF during a defrost, as indicated:
0 = inactive
1 = during a defrost the output gets forced to the status OFF.

F5 0 9 9 (*) 3 evaporator fans stoppage length

It establishes the evaporator fans stoppage length.

LABELMIN. MAX. U.M. ST. DIGITAL INPUTS
u0 0 1 --- 1 output K 4 forced to the status ON during the door switch

It establishes if to force the output K 4 to the status ON during the door switch digital input
activation, as indicated:
0 = inactive
1 = during the door switch digital input activation the output K 4 gets forced to the status

ON.

u1 0 1 --- 1 output K 2 forced to the status OFF during the door switch

It establishes if to force the output K 2 to the status OFF during the door switch digital input
activation, as indicated:
0 = inactive
1 = during the door switch digital input activation the output K 2 gets forced to the status

OFF.

If the parameter d1 has value 2, during a defrost cycle the parameter u1 has not significance.

u2 0 1 --- 0 kind of contact of the door switch digital input

It establishes the kind of contact of the door switch digital input, as indicated:
0 = NO contact
1 = NC contact.

u3 0 1 --- 0 kind of contact of the locking digital input

It establishes the kind of contact of the locking digital input, as indicated:
0 = NO contact

OUTPUT K 2

digital input activation

digital input activation

1 = NC contact.

u4 0 999 sec. 5 disabling time to the locking digital input alarm activa-

It establishes the time that disables the locking digital input alarm activation from the moment
in which the locking digital input alarm happens.

LABELMIN. MAX. U.M. ST. TEMPERATURE ALARM REGULATOR
A0 +1 +15 °C +2 hysteresis (differential)

It establishes the hysteresis (differential) relative to the parameters A1, A2, A3 and A4.

A1 -99 0 °C 0 lower alarm set relative to the cold storing setpoint

It establishes a threshold to add algebraically to the setpoint established with the parameter c3;
the value so obtained establishes the temperature below which the lower temperature alarm
gets activated during a cold storing cycle/phase and it is referred to the cabinet probe.

If the parameter A1 has value 0 the lower temperature alarm never gets activated.

A2 0 +99 ° C 0 upper alarm set relative to the cold storing setpoint

It establishes a threshold to add algebraically to the setpoint established with the parameter c3;
the value so obtained establishes the temperature above which the upper temperature alarm
gets activated during a cold storing cycle/phase and it is referred to the cabinet probe.

If the parameter A2 has value 0 the upper temperature alarm never gets activated.

A3 -99 0 °C 0 lower alarm set relative to the very cold storing setpoint

It establishes a threshold to add algebraically to the setpoint established with the parameter c6;
the value so obtained establishes the temperature below which the lower temperature alarm
gets activated during a very cold storing cycle/phase and it is referred to the cabinet probe.

If the parameter A3 has value 0 the lower temperature alarm never gets activated.

A4 0 +99 °C 0 upper alarm set relative to the very cold storing setpoint

It establishes a threshold to add algebraically to the setpoint established with the parameter c6;
the value so obtained establishes the temperature above which the upper temperature alarm
gets activated during a very cold storing cycle/phase and it is referred to the cabinet probe.

If the parameter A4 has value 0 the upper temperature alarm never gets activated.

A5 0 25 5 min. 30 disabling time to the alarm activation from the storing

It establishes the time that disables the temperature alarm activation from the moment in which
the instrument activates a storing cycle/phase.

A6 0 25 5 min. 0 disabling time to the alarm activation

It establishes the time that disables the temperature alarm activation from the moment in which
the temperature alarm happens.

LABELMIN. MAX. U.M. ST. RESERVED
L 1 --- --- --- --- reserved

Reserved.

L 2 --- --- --- --- reserved

Reserved.

L 3 --- --- --- --- reserved

Reserved.

L 4 --- --- --- --- reserved

Reserved.

ADDITIONAL INFORMATIONS

- the symbol (§) indicates that the parameter is of the first level

- the symbol (*) indicates that the unit of measure depends from the parameter db

- during a “manual ventilation” function the parameters u1 and u2 has not signifi­cance.

SIGNALS AND ALARMSSIGNALS AND ALARMS

SIGNALS AND ALARMS

SIGNALS AND ALARMSSIGNALS AND ALARMS

SIGNALS

If the LED L1 is turned ON it means that a quick cooling/freezing cycle/phase is running.
If the LED L2 is turned ON it means that a storing cycle/phase is running.
If the LED L3 is turned ON it means that the instrument is in the status ON.
If the LED L4 is turned ON it means that a quick cooling cycle/phase is selected.
If the LED L5 is turned ON it means that a quick freezing cycle/phase is selected.
If during the status STAND-BY the LED L6 is turned ON it means that the output K 2 is acti-

vated.
If during the status ON the LED L6 is turned ON it means that a defrost cycle is running.
If the LED L7 is turned ON it means that a cold storing cycle/phase is selected.
If the LED L8 is turned ON it means that a very cold storing cycle/phase is selected.
If the LED L9 is turned ON it means that the needle probe proper insertion verify is not selected.
If the LED L10 is turned ON it means that the quick cooling/freezing for temperature modality

is selected.
If the LED L11 is turned ON it means that the quick cooling/freezing for time modality is se-

lected.
If the LED L12 is turned ON it means that the conditions do not permit to decrease the quick

cooling for temperature maximum length or the quick freezing for temperature maximum length
(see the parameter c8).

If the LED L6 flashes it means that the presentation of a request of a defrost cycle is selected.

tion

activation