Evco S.p.A. • Codice 104K802E04 |
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EVK802 Digital controller for quick coolers management |
version 1.04 |
E ENGLISH
1 PREPARATIONS
1.1 Important
Please read these instructions carefully prior to installation and use, and follow all the precautions for installation and electrical connections; keep these instructions with the device for future consultation.
1.2 Installation
Per panel, using the snap-on brackets supplied; the dimensions are given in mm.
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DIMENS. |
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MINIMUM |
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TYPICAL |
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MAXIMUM |
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A |
71,0 |
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71,0 |
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71,8 |
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B |
29,0 |
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29,0 |
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29,8 |
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Recommendations for installation:
•the maximum depth with screw terminal blocks is 59.0
•the maximum depth with removable terminal blocks is 83.0
•the panel thickness must not exceed 8,0 mm
•ensure that the operating conditions (operating temperature, humidity, etc.) are within the limits indicated in the technical data sheets
•do not install the device near to any sources of heat (heating elements, hot air conduits, etc.), equipment containing powerful magnets (large diffusers, etc.), areas affected by direct sunlight, rain, humidity, excessive dust, mechanical vibration or shock
•in compliance with safety regulations, the device must be installed correctly, and in such a way as to protect against any contact with
electrical parts; all safety devices must be fixed so that they cannot be removed without the use of tools.
1.3 Electrical connections
With reference to the electrical circuit diagram:
•the service controlled by relay K2 depends on parameter u0
•the serial port (available on request) is the port used for communicating with the monitoring system (by means of a serial interface, via TTL, using the MODBUS communication protocol) or with the programming key; the port must not be used for both purposes simultaneously.
Points to note for connecting to the electricity supply
•do not use electric or pneumatic screw-wrenches on the terminal board
•if the device has been moved from a cold to a warm environment, condensation may have formed inside; please wait approx. one hour prior to switching on
•ensure that the voltage, frequency and operational power of the device are compatible with the local power supply
•disconnect the power prior to proceeding with any kind of maintenance operation
•do not use the device as a safety device
•for repairs and any information relating to the device, contact the
Evco dealer network.
2 USER INTERFACE
2.1 Introductory information
The device has the following operational states:
•"on" (the device is switched on and an operating cycle is running)
•"stand-by" (the device is switched on but no operating cycle is running)
•"off" (the device is not switched on).
If power is interrupted during a timed blast chilling operation, when power is restored, chilling will continue from the time point at which the interruption occurred (with a maximum error of 10 minutes).
If power is interrupted during a set-temperature blast chilling operation, when power is restored, chilling will start again from the beginning.
If power is interrupted during a storage operation, when power is restored the storage operation will be reset.
If power is interrupted while in "stand-by" mode, when power is restored the device will be in the same state.
2.2 The display
In the "on" state, during normal operation, the display shows:
•the amount of time remaining for a timed blast chilling operation, if this is ongoing
•the temperature measured by the pin probe if a set-temperature chilling operation is ongoing
•the temperature of the cabinet, if storage is ongoing.
In "stand-by" mode, during normal operation, the display shows the temperature of the cabinet for ½ s every 3 s.
2.3 Defrosting and the evaporator fan
The service controlled by relay K2 depends on parameter u0:
•if u0 = 0, the service controlled by relay K2 will be defrosting (electrical defrosting; the evaporator fan is not controlled)
•if u0 = 0, the service controlled by relay K2 will be defrosting (electrical defrosting; the evaporator fan is not controlled):
-during blast chilling, operation of the evaporator fan depends on parameter F0
-during storage, operation of the evaporator fan depends on parameter F2
-the evaporator fan is started during defrosting.
In "stand-by" mode it is only possible to activate manual defrosting; if the service controlled by relay K2 is the evaporator fan (parameter u0 = 1), during defrosting the evaporator fan will be switched on, and during drip-draining, this will be switched off.
To start defrosting in manual mode:
•ensure no procedure is running
•press
for 4 s.
Defrosting is never activated during blast-chilling.
Defrosting occurs periodically during storage; it is possible to start defrosting manually.
2.4Viewing the status of the compressor and the evaporator fan
To view the compressor status:
•ensure no procedure is running
•press
: the display will show the first available label:
-if the display shows "C-1", the compressor will be switched-on
-if the display shows "C-0", the compressor will be switched off
-if the display shows "C-P", compressor protection will be ongoing (parameters C0, C1, C2 and i7).
To view the status of the evaporator fan:
•ensure no procedure is running
•press twice: the display will show the first available label:
-if the display shows "F-1", the evaporator fan will be switched on
-if the display shows "F-0", the evaporator fan will be switched off
-if the display shows "F-P", then evaporator fan deferred activation will
be ongoing (parameter F8). To exit the procedure:
• press
until the display shows the ongoing status value (see paragraph 2.2), or leave for 15 s.
If the service controlled by relay K2 is defrosting (parameter u0 = 0), labels "F-1", "F-0" and "F-P" will not be displayed.
2.5 Buzzer mute
•ensure no procedure is running
•press any key (the first key press does not trigger the associated effect).
3 OPERATIONAL CYCLES
3.1 Introductory information
The device has the following operational cycles:
•timed positive chilling and storage
•timed negative chilling and storage
•set-temperature positive chilling and storage
•set-temperature negative chilling and storage.
Set-temperature cycles are preceded by a test step in order to check correct insertion of the pin probe (see paragraph 3.6).
To re-start using the same settings as the last cycle run:
•ensure that the device is in "stand-by" mode, that no procedures are running and that another cycle has not been selected
•press
2 s: the display will show the label of the last cycle run
• press |
within 60 s: in the case of a timed cycle, the display will |
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show the duration of the blast chilling step (in minutes) or |
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in the case of a set-temperature cycle, the set target tempera- |
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ture |
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• press |
or |
within 15 s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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r1, r2, r3 or r4 is restored) |
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• press |
within 15 s: the cycle will be activated. |
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3.2 Timed positive blast chilling and storage cycle
To start the cycle:
•ensure the device is in "stand-by" mode and no procedures are running
•press 
to select "PoS" and ensure the LED 
is flashing
•press within 15 s: the display will show the duration of the blast
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chilling step (in minutes) |
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• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r1 is restored) |
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• press |
: the display will show the chilling operational setpoint (in |
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°C/°F) and the LED |
will flash |
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• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r7 is restored) |
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•press
within 15 s: the cycle will be activated. Also look at parameters rb and E0.
During chilling:
•the display shows the residual chilling time remaining
•the LED 
is on
•parameter r1 sets the chilling time duration
•parameter r7 sets the operational setpoint
•press
several times to:
-display the message "PoS"
-display the cabinet temperature
-exit the procedure, or leave for 15 s. Once the chilling period has elapsed:
• the device switches to storage mode
• the display shows the message "End"
•the buzzer sounds for the period of time set by parameter AA
•press any key to mute the buzzer; press once more to cancel the message
"End". During storage:
•the display shows the cabinet temperature
•the LEDs 
and 
are on
•the parameter r9 sets the operational setpoint
•press
several times to:
-display the message "PoS"
-exit the procedure, or leave for 15 s. To interrupt the cycle:
• press
for 2 s.
3.3 Timed negative chilling and storage cycle
To start the cycle:
• ensure the device is in "stand-by" mode and no procedures are running
• press 
to select "nEg" and ensure the LED 
is flashing
• press
within 15 s: the display will show the duration of the blast chilling step (in minutes)
• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r2 is restored) |
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• press |
: the display will show the chilling operational setpoint (in |
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°C/°F) and the LED |
will flash |
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• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r8 is restored) |
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•press
within 15 s: the cycle will be activated. Also look at parameters rb and E0.
During chilling:
•the display shows the residual chilling time remaining
•the LED 
is on
•parameter r2 sets the chilling time duration
•parameter r8 sets the operational setpoint
•press several times to:
-display the message "nEg"
-display the cabinet temperature
-exit the procedure, or leave for 15 s. Once the chilling period has elapsed:
• the device switches to storage mode
• the display shows the message "End"
•the buzzer sounds for the period of time set by parameter AA
•press any key to mute the buzzer; press once more to cancel the message
"End". During storage:
•the display shows the cabinet temperature
•the LEDs 
and 
are on
•the parameter rA sets the operational setpoint
•press several times to:
-display the message "nEg"
-exit the procedure, or leave for 15 s. To interrupt the cycle:
• press
for 2 s.
3.4Set-temperature positive blast chilling and storage cycle
To start the cycle:
•ensure the device is in "stand-by" mode and no procedures are running
•press
to select "PoS" and ensure the LED 
is flashing
•press
within 15 s: the display will show the blast chilling end-
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point temperature |
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• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r3 is reset) |
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• press |
: the display will show the chilling operational setpoint (in |
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°C/°F) and the LED |
will flash |
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• press |
or |
within 15 |
s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r7 is restored) |
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•press
within 15 s: the cycle will be activated. Also look at parameters rb and E0.
Prior to starting the cycle:
•the test is run in order to check correct pin probe insertion (see para-
graph 3.6):
-if the outcome of the test is positive, the cycle will be started
-if the outcome of the test is negative, the cycle will be started in timed
mode. During chilling:
•the display shows the temperature measured by the pin probe
•the LED 
is on
•the parameter r3 sets the blast chilling endpoint temperature
•the parameter r5 sets the maximum chilling time duration
•the parameter r7 sets the operational setpoint
•press
several times to:
-display the maximum residual chilling time remaining
-display the message "PoS"
-display the flashing cabinet temperature
-exit the procedure, or leave for 15 s.
If the temperature measured by the pin probe reaches the chilling endpoint temperature prior to expiry of the maximum chilling time duration:
•the device will switch to storage mode
•the display will show the message "End"
•the buzzer will sound for the period of time set by parameter AA
•press any key to mute the buzzer; press once more to cancel the
message "End".
If the temperature measured by the pin probe does not reach the chilling endpoint temperature prior to expiry of the maximum chilling time
duration: |
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• chilling will |
continue |
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• the LED |
will flash and the LED |
will be on |
•the buzzer will sound
•press
several times to: - mute the buzzer
- display the time elapsed since the maximum chilling time expired - display the cabinet temperature
- display the message "PoS"
- exit the procedure, or leave for 15 s
•when the temperature measured by the pin probe reaches the chilling endpoint temperature:
- the device switches to storage mode
- the LED 
will continue to flash and the LED 
will stay on
-the display will show the message "End"
-the buzzer will sound for the period of time set by parameter AA
-press any key to mute the buzzer; press once more to cancel the message "End".
During storage:
•the display shows the cabinet temperature
•if chilling had a positive outcome, the LEDs 
and 
and will be on; if chilling had a negative outcome, the LEDs 
and 
will be on and the LED 
will flash
•the parameter r9 sets the operational setpoint
•press several times to:
-display the message "PoS"
-exit the procedure, or leave for 15 s. To interrupt the cycle:
• press
for2 s.
3.5 Set-temperature negative chilling and storage cycle
To start the cycle:
• ensure the device is in "stand-by" mode and no procedures are run-
ning
•press
to select "nEg" and ensure the LED 
is flashing
•press within 15 s: the display will show the blast chilling end-
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point temperature |
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• press |
or |
within 15 s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r4 is restored) |
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• press |
: the display will show the chilling operational setpoint (in |
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°C/°F) and the LED |
will flash |
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• press |
or |
within 15 s to change the value (the setting re- |
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mains active until another cycle is selected, when the value |
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assigned by parameter r8 is restored) |
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• press |
within 15 s: the cycle will be activated. |
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Also look at parameters rb and E0.
Prior to starting the cycle:
• the test is run in order to check correct pin probe insertion (see paragraph 3.6):
-if the outcome of the test is positive, the cycle will be started
-if the outcome of the test is positive, the cycle will be started. During chilling:
•the display shows the temperature measured by the pin probe
•the LED 
is on
•the parameter r4 sets the chilling endpoint temperature
•the parameter r6 sets the maximum chilling time duration
•the parameter r8 sets the operational setpoint
•press several times to:
-display the maximum residual chilling time remaining
-display the message "nEg"
-flashing display the cabinet temperature
-exit the procedure, or leave for 15 s.
If the temperature measured by the pin probe reaches the chilling endpoint temperature prior to expiry of the maximum chilling time duration:
•the device will switch to storage mode
•the display will show the message "End"
•the buzzer will sound for the period of time set by parameter AA
•press any key to mute the buzzer; press once more to cancel the
message "End".
If the temperature measured by the pin probe does not reach the chilling endpoint temperature prior to expiry of the maximum chilling time duration:
•chilling will continue
•the LED 
will flash and the LED 
will be on
•the buzzer will sound
•press
several times to:
-mute the buzzer
-display the time elapsed since the maximum chilling time expired
-display the cabinet temperature
-display the message "nEg"
-exit the procedure, or leave for 15 s
•when the temperature measured by the pin probe reaches the chilling endpoint temperature:
-the device will switch to storage mode
-the LED 
will continue to flash and the LED 
will continue to stay on
-the display will show the message "End"
-the buzzer will sound for the period of time set by parameter AA
-press any key to mute the buzzer; press once more to cancel the message "End".
During storage:
•the display shows the cabinet temperature
•if chilling had a positive outcome, the LEDs 
and 
and will be on; if chilling had a negative outcome, the LEDs 
and 
will be on and the LED 
will flash
•the parameter rA sets the operational setpoint
•press several times to:
-display the message "nEg"
-exit the procedure, or leave for 15 s. To interrupt the cycle:
• press
for2 s.
3.6 Test to check correct pin probe insertion
Set-temperature cycles are preceded by a test step in order to check correct pin probe insertion.
The test has two stages:
•if the outcome of the first stage is positive, the second will not be run
•if the outcome of the first stage is negative, the second will be run. The outcome of the first stage is positive if "the temperature measured by the pin probe - the temperature of the cabinet" is greater than the value set by parameter rc at least 3 times out of 5 (the comparison is made every 10 s); if parameter rc is set to 0, neither the first nor second stages will be run.
The outcome of the second stage is positive if the difference "temperature measured by the pin probe - temperature of the cabinet" is greater by at least 1ºC/1ºF (with respect to the previous comparison) at least 6 times out of 8 (the comparison is made every "rd/8 s").
If the outcome of the test is positive:
•the cycle will be activated.
the cycle will be activated:
•the cycle will be started in timed mode
•the LED will flash.
If power is interrupted during the test, when power is restored, the test will start again from the beginning.
4 SETTINGS
4.1 Temporary setting of operational setpoint during storage
•ensure the device is in "stand-by" mode and no procedures are running
•press
: the LED 
will flash
•press
or 
within15 s
•press or leave for 15 s.
The setting remains active until another operational cycle is selected, when the value assigned by parameter r9 or ra is restored.
4.2 Setting the configuration parameters
The parameters are arranged on two levels. To access the first level:
•ensure the device is in "stand-by" mode and no procedures are running
•press
and 
for 4 s: the display will show “PA”
To access the second level:
•access the first level
•press
or 
to select “PA”
•press
•press
or 
within 15 s to set “-19”
•press
or leave for 15 s
•press
and 
for4 s: the display will show “CA1”. To select a parameter:
•press or
To modify a parameter:
•press
•press
or 
within 15 s
•press or leave for 15 s.
To exit the procedure:
• press
and 
for 4 s, or leave for 60 s.
IInterrupt the device power supply after altering the parameters.
4.3 Resetting configuration parameter default values
•ensure the device is in "stand-by" mode and no procedures are running
• press |
and |
for 4 s: the display will show “PA” |
•press
•press
or 
within 15 s to set “743”
•press
or leave for 15 s
• press |
and |
per 4 s: the display will show “dEF” |
•press
•press
or 
within 15 s to set “149”
•press
or leave for 15 s: the display will flash "dEF" for 4 s, after
which the device will exit the procedure
• interrupt the power to the device.
Ensure that the parameter default values are appropriate, particularly if the probes are NTC type.
5 SIGNALS
5.1 Signals
LED MESSAGE
timed chilling LED
•if on and the LED 
is off, a timed chilling operation is ongoing
•if on and the LED 
is also on, a post timed-chilling storage operation is ongoing
•if flashing, a timed chilling and storage cycle will have been selected
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set-temperature chilling LED |
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• if on and the LED |
is off, a set-temperature chilling op- |
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eration is ongoing |
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• if on and the LED |
is also on, a post set-temperature |
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chilling storage operation will be ongoing |
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• if flashing, a set-temperature chilling and storage cycle |
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will have been selected |
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• if it is on for ½ s every 3 s, the test to verify correct pin probe |
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insertion will be ongoing |
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• if flashing, and the LED |
is on, then the test to verify |
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correct pin probe insertion will have had a negative out- |
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come (parameters rc and rd) and the cycle will have been |
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started in timed mode; see paragraph 3.6 |
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• if flashing, and the LED |
is on, the chilling stage will |
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have had a negative outcome, and so this will continue |
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• if flashing, and the LEDs |
and |
are on, the chilling |
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stage will have had a negative outcome, the device will |
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have switched to storage mode and this will be ongoing |
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storage LED |
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• if on, a storage operation will be ongoing |
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• if flashing, then the operational setpoint will be being |
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modified while a storage operation is ongoing (see para- |
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graph 4.1) |
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alarm LED |
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if on, an alarm is ongoing |
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°C |
degree Celsius LED |
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if on, the unit of measurement for temperature is degrees |
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Celsius (parameter P2) |
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°F |
degree Fahrenheit LED |
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if on, the unit of measurement for temperature is degrees |
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Fahrenheit (parameter P2) |
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decimal |
minute LED |
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point |
if flashing, the unit of measurement of magnitude displayed |
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is the minute |
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CODE |
MESSAGE |
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- d - |
defrosting or drip draining is ongoing |
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