EVCO EK820AP7 - Manual (Page 3)

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 (dif-
ferential) 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 condi-
tions permit it (the temperature read by the evaporator probe must be below the defrost stop-
ping setpoint) the instrument automatically presents the following request of a defrost cycle.
A defrost cycle provides three phases (defrost, dripping and evaporator fans stoppage) con-
nected 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 param-
eters 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 accord-
ing 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 acti-
vation is refused
- for the whole period of a locking digital input alarm the cold storing cycle activa-
tion 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 accord-
ing 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 6 3
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 associ-
ated 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 tem-
perature and cold storing cycle activation is refused
- for the whole period of a locking digital input alarm the quick cooling for tempera-
ture and cold storing cycle activation is refused
- for the whole period of a needle probe failure alarm the quick cooling for tempera-
ture and cold storing cycle activation is refused
- for the whole period of a cabinet probe failure alarm the quick cooling for tempera-
ture and cold storing cycle activation is refused
- for the whole period of a door switch digital input alarm the quick cooling for tem-
perature 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 associ-
ated 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 associ-
ated 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 tem-
perature and very cold storing cycle activation is refused
- for the whole period of a locking digital input alarm the quick freezing for tempera-
ture and very cold storing cycle activation is refused
- for the whole period of a needle probe failure alarm the quick freezing for tempera-
ture and very cold storing cycle activation is refused
- for the whole period of a cabinet probe failure alarm the quick freezing for tempera-
ture 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 associ-
ated 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 inser-
tion 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
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 indica-
tion “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) (de-
activate 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 indica-
tion “---” 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 unsuc-
cessful (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 cabi-
net 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 DA TECHNICAL DA TECHNICAL DA TECHNICAL DA TECHNICAL DAT TT T TA A A A A
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
blocks.
Installation: panel mounting, panel cutout 67 x 138 mm (2.63 x 5.43
in.), with the equipped screw brackets.
Type of protection: IP 54.
Connections: extractable screw terminal blocks with pitch 7.5 mm (0.29
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).
Ambient temperature: from 0 to +60 °C (+32 to +140 °F, 10 ... 90 % of not con-
densing relative humidity).
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
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.
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,
from 0 to 999 min. for the quick cooling/freezing for time.
Resolution: 1 °C.
Display: two 3-digit display 12.5 mm (0.49 in.) high red LED dis-
play with automatic minus sign, functioning status indica-
tors, programming status indicators.
Outputs: four relays of which one 16 (2) A @ 250 Vac relay for one
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) manage-
ment and for cabinet light (NO contact) control.
Kind of defrost managed: to resistances (electrical), to hot gas (reversal of cycle), and
to air (open door) automatic and manual.
Defrost management: for interval, stopping temperature and maximum length.
HOW TO ORDER HOW TO ORDER HOW TO ORDER HOW TO ORDER HOW TO ORDER
CODING SYSTEM
Instrument name:
EK 820A.
Desired measure input: P (for PTC probes).
Desired power supply: 220 (230 Vac).