EVCO EVF204N9 User Manual

version 1.00

Evco S.p.A. • Code 104F204E00 • page 1/8

EVF204 Digital controller for refrigerated cabinets, made up from user interface with capacitive touch keys (integrated into the unit) and a control module

EN	ENGLISH
1	IMPORTANT

1.1Important

Read these instructions carefully before installation and before use and follow all installation recommendations regarding installation and the electric connections. Keep the instructions with the instrument for future consultation.

The instrument must be disposed of in compliance with the local Standards regarding the collection of electrical and electronic appliances.

2 INTRODUCTION

2.1Introduction

EVF204 is a digital controller developed for the management of normal		• TTL serial port with MODBUS communication protocol.	Using a serial interface (to be ordered separately) it is also possible to
or low temperature refrigerated cabinets. whose design and easy		The models have “split” execution (user interface + control module).	connect the controller to the Parameters Manager set-up software or
cleaning cover an important role.		The user interface is behind a methacrylate sheet and is made up from	to the monitoring and supervision system of RICS plants (via TTL, with
The instrument has:		a 4-digit custom display (with icon function) and 6 capacitive touch	MODBUS communication protocol).
• alarm buzzer		keys (set, up, down, defrosting, cabinet light and on/stand-by); back
• 3	measurement inputs (cabinet probe, evaporator probe and	panel installation is envisioned, using double-sided adhesive tape, for
condenser probe) for NTC probes		its complete mechanical and aesthetic integration into the cabinet.
• 2	digital inputs (door micro switch and multipurpose)	The control module is in open frame board; installation is envisioned
• 4	digital outputs (relays) for compressor management	on a flat surface with spacers.
(30 A @ 250 VAC), defrost and evaporator fan management and a		Using the EVKEY programming key (to be ordered separately)
fourth utility (cabinet light, demisting heater, auxiliary output, alarm		configuration parameters can be uploaded and downloaded.
output, door heater, evaporator valve or condenser fan).Defrosting
can be electric or using hot gas.
3	DIMENSIONS AND INSTALLATION

3.1User interface dimensions

The dimensions are expressed in mm (in); installation is envisioned behind the panel using double-sided adhesive tape.

3.2	Control module dimensions	3.3	Recommendations for installation
The dimensions are expressed in mm (in); installation is envisioned on a flat surface using spacers.		• make sure that the work conditions (temperature of use, humidity,
		etc.) lie within the limits indicated in the technical data
		• do not install the instrument in proximity of heat sources (heaters,
		hot air pipes etc.) appliances with strong magnets (large diffusers
		etc.), places subject to direct sunlight, rain, humidity, excessive dust,
		mechanical vibrations or shocks
		• any metal parts in proximity of the control module must be at a
		distance such as not to compromise the safety distances
		• in compliance with Safety Standards, the protection against any
		contact with the electric parts must be ensured via correct installation
		of the instrument. All parts that ensure protection must be fixed in a
		way such that they cannot be removed without the aid of a tool.

4

USER INTERFACE

4.1Preliminary considerations

The following functioning states exist:		If the instrument is off, the display will be off.				To exit the procedure:
• the “on” status (the instrument is powered and on: the regulators can		4.4	Evaporator temperature display			• press and release the		key or do not operate for 60 s
be on)		• make sure that the keyboard is not locked and that no procedure is				• press and release the		key or the key until the display shows the
• the “stand-by” status (the instrument is powered but is switched off		in progress				cabinet temperature or do not operate for 60 s.
software: the regulators are off, the possibility of switching the cabinet		• hold the	key down for 1 s: the display will show the first label			Alternatively:
light or auxiliary output on/off in manual mode depends on parameter		available				• press and release the		key.
u2)		• press and release the		key or the	key to select “Pb2”	If the condenser probe is absent (parameter P4 = 0), the “Pb3” label
• the “off” status (the instrument is not powered).		• press and release the		key.		will not be displayed.
Successively, the term “switch-on” means that the passage from the		To exit the procedure:				4.6	Activation/deactivation of the Overcooling
stand-by status to the on status; the term “switch-off” means the passage		• press and release the		key or do not operate for 60 s			function
from the on status to the stand-by status.		• press and release the		key or the	key until the display shows the	• make sure that the keyboard is not locked, that no procedure is in
When the instrument is powered it re-proposes the status in which it		cabinet temperature or do not operate for 60 s.				progress and defrosting is not in progress along with dripping or
found itself at the time when the power supply was disconnected.		Alternatively:				evaporator fan standstill.
4.2	Instrument switch-on/off in manual mode	• press and release the		key.		• hold the	key down for 4 s: the Overcooling LED will switch-on.
• make sure that the keyboard is not locked and that no procedure is		If the evaporator probe is absent (parameter P3 = 0), the “Pb2” label				During the Overcooling function, the work set-point is decreased
in progress		will not be displayed.				from the temperature established by parameter r5; the function will
• hold the	key down for 2 s: the on/stand-by LED switches-on/off.	4.5	Condenser temperature display			last for the time established by parameter r6.
The multipurpose input can also be used to switch the instrument on/		• make sure that the keyboard is not locked and that no procedure is				Defrosting is never activated during the Overcooling function; if the
off in remote mode.		in progress				defrosting interval expires when the function is in progress, defrosting
4.3	The display	• hold the	key down for 1 s: the display will show the first label			will be activated on conclusion of the function.
If the instrument is on, during normal functioning the display will		available				4.7	Activation of defrosting in manual mode
show the temperature of the cabinet, except during defrosting, when		• press and release the		key or the	key to select “Pb3”	• make sure that the keyboard is not locked, that no procedure is in
the instrument will display the temperature established with		• press and release the		key.		progress and the Overcooling function is not in progress
parameter d6.						• hold the	key down for 4 s.

Evco S.p.A. • Code 104F204E00 • page 2/8

If the function of the evaporator probe is that of defrosting probe (parameter P3 = 1) and on activation of defrosting the temperature of the evaporator is above that established with parameter d2, defrosting will not be activated.

4.8Functioning due to low or high relative humidity percentage (only if parameter F0 is set at 5)

During functioning due to low relative humidity percentage, the evaporator fan will be switched-on if the compressor is on and is switched-on cyclically if the compressor is off (parameter F4 establishes the duration of evaporator fan switch-off and parameter F5 that regarding switch-on).

During functioning due to the high relative humidity percentage, the evaporator fan is always on.

4.8.1Activation of the functioning due to low or high

relative humidity percentage (only if parameter F0 is set at 5)

•make sure that the keyboard is not locked and that no procedure is in progress

•press and hold the and key for 4 s: the display will show “rhL”

(functioning due to low relative humidity percentage) or “rhH” (functioning due to high relative humidity percentage) for 10 s.

To restore normal display in advance:

• press a key.

It is also possible to activate functioning due to low or high relative humidity percentage using parameter F6.

If parameter F0 is not set at 5, pressing the	and	key will cause the
“- - - -“ indication to be displayed for 1 s.

4.8.2Learning of the type of functioning in progress (due to low or high relative humidity percentage

only if parameter F0 is set at 5)

•make sure no procedure is in progress

•press and release the key and the key: the display will show “rhL” (functioning due to low relative humidity percentage) or “rhH”

(functioning due to high relative humidity percentage) for 10 s.

To restore normal display in advance:
• press a key.
If parameter F0 is not set at 5, pressing the	and	key will cause:

•the display of the “- - - -“ indication for 1 s if the keyboard is not locked

•the display of the “Loc” label for 1 s if the keyboard is locked.

4.9Switch-on/off of the cabinet light in manual mode

(only if parameter u1 is set at 0)

•make sure no procedure is in progress

•press and release the key: the light LED will switch-on/off. Using the door micro switch input, the cabinet light can also be switched-on/off in remote mode; see also parameter u2.

4.10Switch-on of the demisting heaters (only if parameter u1 is set at 1)

•make sure that the instrument is on and that no procedure is in progress

•hold the key down for 2 s: the multipurpose LED will switch-on and the heaters will be switched on, both for the time established with parameter u6.

The demisting heaters cannot be switched off in manual mode (i.e. before the time established with parameter u6 has passed).

4.11Switch-on/off of the auxiliary output in manual

mode (only if parameter u1 is set at 2)

•make sure that the keyboard is not locked and that no procedure is in progress

•press and release the key.

The multipurpose input can also be used to switch the auxiliary output on/off in remote mode.

If the auxiliary output has been switched on in manual mode, sit can only be switched off in the same way (also, if the auxiliary output has been switched off in remote mode, it can only be switched off in the same way); see also parameter u2.

4.12Energy Saving

During the Energy Saving function, the work set-point is increased of the temperature established with parameter r4 and the evaporator fan is switched on cyclically, on condition that the parameter F0 is set at 1 or 2 (parameter F13 establishes the duration of fan switch-off and parameter F14 that regarding switch-on).

When the time established with parameter i10 has passed without activation of the door micro switch (after the cabinet temperature has reached the work set-point) the Energy Saving function is activated automatically (until the input is activated again).

4.12.1Activation/deactivation of the Energy Saving function with effect only on the compressor

The multipurpose input can also be used to switch the Energy Saving function on/off in remote mode.

4.13 Lock/unlock of the keyboard

To lock the keyboard:

•make sure no procedure is in progress

•press and hold the and key for 1 s: the display will show “Loc” for 1 s.

If the keyboard is locked, the following is not allowed:

•to switch the instrument on/off in manual mode

•to display the evaporator temperature (with the procedure indicated in paragraph 4.4)

•to display the condenser temperature (with the procedure indicated in paragraph 4.5)

•activated/deactivate the Overcooling function

•activate defrosting in manual mode

•to activate functioning due to high or low relative humidity percentage and to learn the type of functioning

•to switch the auxiliary output on/off in manual mode

•to display the information regarding the HACCP alarms

•to delete the list of HACCP alarms

•to modify the work set-point (with the procedure indicated in paragraph 5.1)

•to display the compressor functioning hours

•to cancel the compressor functioning hours.

These operations cause the “Loc” label to be displayed for 1 s. To unlock the keyboard:

•press and hold the and key for 1 s: the display will show “UnL” for 1 s.

4.14Silencing the buzzer

•make sure no procedure is in progress

•press a key (the first time the key is pressed does not cause the associated effect).

If parameter u1 is set at 3 (i.e. the utility managed by the fourth output is the alarm output) and parameter u4 is set at 1, pressing the key will also cause the alarm output to be deactivated.

If parameter u9 is set at 0, the buzzer will not be enabled.

5 SETTINGS

5.1Setting the work set-point

•make sure that the keyboard is not locked and that no procedure is in progress

•press and release the key: the compressor LED will flash

•press and release the key or the key within 15 s; see also parameters r1, r2 and r3

•press and release the key or do not operate for 15 s the compressor LED will switch-off, after which the instrument will exit the procedure.

To exit the procedure in advance:

• do not operate for 15 s (any modifications will be saved). It is also possible to set the work set-point via parameter SP.

5.2 Setting the configuration parameters

To access the procedure:

•make sure no procedure is in progress

•press and hold the and key for 4 s: the display will show “PA”

•press and release the key

•press and release the key or the key within 15 s. to set “-19”

•press and release the key or do not operate for 15 s

•press and hold the and key for 4 s: the display will show “SP”. To select a parameter:

•press and release the key and the key.

To modify a parameter:

•press and release the key

•press and release the key or the key within 15 s.

•press and release the key or do not operate for 15 s. To exit the procedure:

•press and hold the key and the key for 4 s or do not operate for 60 s (any modifications will be saved).

Cut off the power supply to the instrument after modification of the parameters.

5.3 Restoring factory settings

To access the procedure:

•make sure no procedure is in progress

•press and hold the and key for 4 s: the display will show “PA”

•press and release the key

•press and release the key or the key within 15 s. to set “149”

•press and release the key or do not operate for 15 s

•press and hold the and key for 4 s: the display will show “dEF”

•press and release the key

• press and release the

key or the

key within 15 s. to set “1”

•press and release the key or do not operate for 15 s the display will show flashing “dEF” for 4 s, after which the instrument will exit the procedure

•cut the instrument power supply off.

To exit the procedure in advance:

•press and hold the key and the key for 4 s during the procedure (i.e. before setting “1”: restore will not be performed).

Check that the factory settings are appropriate (see chapter 12).

6 HACCP FUNCTION

6.1Preliminary considerations

The instrument is able to store up to 3 HACCP alarms. The instrument provides the following inoformation:

•the critical value

•the alarm duration (from 1 min to 99 hours and 59 min, partial if the

alarm is in progress).

CODE ALARM TYPE (CRITICAL VALUE)

AL minimum temperature alarm (the minium cell temperature during any alarm of this type)

AH maximum temperature alarm (the maximum cell temperature during any alarm of this type)

id door microswitch input alarm (the maximum cell temperature during any alarm of this type; see also parameter i4

Important Notes:

•the codes are displayed in the order shown in the table

•the instrument stores the minimum and maximum temperature alarms provided the temperature associated with the alarm is that of the cell (parameter A0 = 0)

•the instrument updates the information regarding the the alarm provided the critical value of the new alarm is more critical than that stored alarm or provided the information has already been displayed.

•if the instrument is switched off, no alarms will be stored.

When the problem that caused the alarm disappears, the display is restored to normal operation.

The HACCP LED provides information regarding the HACCP alarm storage status; see paragraph 8.1.

6.2Display of the information regarding the HACCP

alarms

To start the procedure:

•ensure that the keyboard is not locked and that no other procedure is in progress

•hold down the key for 1 sec: the display will show the first label available

•press and release the or key to select “LS”

•press and release the key: the display will show one of the codes included in the table in paragraph 6.1.

To select an alarm:

•press and release the or key (to select, for example, “AH”). To view the information about the alarm:

•press and release the key: the HACCP LED will stop flashing and remain permanently on and the display will show the following sequence of information (for example):

INFO.	MEANING
8.0	the critical value is 8.0 °C/8 °F
dur	the display is about to show the duration of the alarm
h01	the alarm has been going off for 1 hour (data continues ...)
n15	the alarm lasted for 1 hour and 15 min
AH	the alarm selected

The display shows each message for 1 sec.

To exit the sequence of information:

•press and release the key: the display will show the alarm selected (in the example “AH”).

To exit the procedure:

•exit the sequence of information

•press and release the or key until the display shows the cell temperature and then do not operate for 60 sec.

Alternatively:

•exit the sequence of information.

•press and release the key.

If the instrument does not have any alarms stored, the label “LS” will not be displayed.

6.3Deletion of the list of HACCP alarms

•make sure that the keyboard is not locked and that no procedure is in progress

•hold the key down for 1 s: the display will show the first label available

•press and release the key or the key to select “rLS”

•press and release the key

• press and release the

key or the

key within 15 s. to set “149”

•press and release the key or do not operate for 15 s the display will show flashing “- - - -” for 4 s. and the HACCP LED will switch-off, after which the instrument will exit the procedure.

If the instrument has no alarm in the memory, the “rLS” label will not be displayed.

7 COUNTING THE COMPRESSOR FUNCTIONING HOURS

7.1Preliminary considerations

The instrument can memorise up to 9.999 compressor functioning hours, after which the number “9999” flashes.

7.2Display of the compressor functioning hours

•make sure that the keyboard is not locked and that no procedure is in progress

•hold the key down for 1 s: the display will show the first label available

•press and release the key or the key to select “CH”

•press and release the key.

To exit the procedure:

• press and release the key or do not operate for 60 s

•press and release the key or the key until the display shows the cabinet temperature or do not operate for 60 s.

Alternatively:
• press and release the		key.
7.3	Deletion of the compressor functioning hours

•make sure that the keyboard is not locked and that no procedure is in progress

•hold the key down for 1 s: the display will show the first label available

• press and release the	key or the	key to select “rCH”
• press and release the	key
• press and release the	key or the	key within 15 s. to set “149”

•press and release the key or do not operate for 15 s the display will show flashing “- - - -” for 4 s, after which the instrument will exit the procedure.

Evco S.p.A. • Code 104F204E00 • page 3/8

8	SIGNALS AND INDICATIONS
8.1	Signals
LED	MEANING
	compressor LED
	if on, the compressor will be on
	if flashing:
	• the work set-point modification will be in progress (with
	the procedure indicated in paragraph 5.1)
	• a compressor protection will be in progress:
	- parameters C0, C1, C2
	- parameter i7
	defrosting LED
	if it is on:
	• defrosting will be in progress
	• pre-dripping will be in progress
	- parameter d16
	if flashing:
	• defrosting will be requested but a compressor protection
	will be in progress:
	- parameters C0, C1 and C2
	• dripping will be in progress:
	- parameter d7
	• refrigerant fluid heating will be in progress:
	- parameter d15
	evaporator fan LED
	if on, the evaporator fan will be on
	if it flashes, the evaporator fan standstill is in progress
	- parameter F3
	cabinet light LED
	if on, the cabinet light will have been switched-on in
	manual mode (only if parameter u1 is set at 0)
	if flashing, the cabinet light will have been switched on in
	remote mode:
	- parameter i0 (only if parameter u1 is set at 0)
	multipurpose LED
	if it is on:
	• the demisting heaters will be on (only if parameter u1 is
	set at 1)
	• the auxiliary output will have been switched-on in manual
	mode (only if parameter u1 is set at 2)
	• the door heaters will be on (only if parameter u1 is set at 4)
	• the evaporator valve will be activated (only if parameter
	u1 is set at 5)
	• the condenser fan will be on (only if parameter u1 is set at 6)
	if flashing:
	• the auxiliary output will have been switched-on in remote
	mode:
	- parameter i5 (only if parameter u1 is set at 2)
	• the condenser fan switch-off delay will be in progress:
	- parameter F12 (only if parameter u1 is set at 6)
HACCP	HACCP LED (only if parameter A13 is set at 1)
	id it is on, all of the information regarding the HACCP alarms
	has not been displayed
	if it flashes, the instrument will have memorised at least one
	new HACCP alarm
	if it is off, all of the information regarding the HACCP alarms
	will have been displayed or the list of HACCP alarms will
	have been deleted
	Energy Saving LED
	if on, the Energy Saving function will be in progress:
	- parameters r4, F13, F14, i5 and i10
	maintenance LED
	if on, compressor maintenance will be requested:
	- parameter C10
	Overcooling LED
	if on, the Overcooling function will be in progress
	- parameters r5 and r6
	alarm LED
	if it is on, an alarm or an error is in progress
°C	degree Celsius LED
	if it is on, the unit of measurement of the temperatures will
	be the degree Celsius:
	- parameter P2
°F	degree Fahrenheit LED
	if it is on, the unit of measurement of the temperatures will
	be the degree Fahrenheit:
	- parameter P2
	on/stand-by LED
	if it is on, the instrument is in the stand-by status
8.2	Indications
CODE	MEANING
rhL	functioning due to low relative humidity percentage is in
	progress
rhH	functioning due to high relative humidity percentage is in
	progress
Loc	the keyboard is locked:
	- see paragraph 4.13
	the work set-point is blocked:

-parameter r3

-- - - the functioning requested is not available

9	ALARMS
9.1	Alarms
CODE	MEANING
AL	Minimum temperature alarm (HACCP alarm)
	Solutions:
	• check the temperature associated to the alarm
	• see:
	- see parameters A0, A1 and A2
	Main consequences:
	• the instrument memorises the alarm, on condition that
	parameter A0 is set at 0
	• the alarm output will be activated (only if parameter u1
	is set at 3)
AH	Maximum temperature alarm (HACCP alarm)
	Solutions:
	• verify the temperature of the cabinet
	• see:
	- parameters A4 and A5
	Main consequences:
	• the instrument memorises the alarm
	• the alarm output will be activated (only if parameter u1
	is set at 3)
id	Door micro switch input alarm (HACCP alarm)
	Solutions:
	• check the causes that brought about the activation of the
	input
	• see parameters i0, i1 and i4
	Main consequences:
	• the effect established with parameter i0
	• if parameter i4 is set at 1, the instrument memorises the
	alarm, on condition that parameter i2 is not set at -1
	• the alarm output will be activated (only if parameter u1
	is set at 3)
iA	Multipurpose input alarm
	Solutions:
	• check the causes that brought about the activation of the
	input
	• see parameters i5 and i6
	Main consequences:
	• the effect established with parameter i5
	• the alarm output will be activated (only if parameter u1
	is set at 3)
iSd	Pressure switch alarm
	Solutions:
	• check the causes that brought about the activation of the
	input
	• see parameters i5, i6, i7, i8 and i9
	• switch the instrument off and back on again or cut the
	power supply off
	Main consequences:
	• the regulators will be switched off
	• the alarm output will be activated (only if parameter u1
	is set at 3)
COH	Overheated condenser alarm
	Solutions:
	• verify the temperature of the condenser
	• see parameter C6
	Main consequences:

•the alarm output will be activated (only if parameter u1 is set at 3)

•if parameter u1 is set at 6, the condenser fan will be on CSd Blocked compressor alarm

Solutions:

•verify the temperature of the condenser

•see parameter C7

•switch the instrument off and back on again: when the instrument is switched back on, if the condenser temperature is still above that established with parameter C7, the power supply must be disconnected and the

condenser cleaned. Main consequences:

•the evaporator compressor and fan will be switched off

•the alarm output will be activated (only if parameter u1

is set at 3)

dFd Defrosting concluded due to maximum duration alarm Solutions:

•check the integrity of the evaporator probe

•see parameters d2, d3 and d11

•press a key to restore normal display

Main consequences:

• the instrument continues to function regularly

When the cause of the alarm has disappeared, the instrument will go back to normal functioning, except for the following alarms:

•the pressure switch alarm (“iSd” code), which requires the instrument to be switched off or the power supply to be cut-off

•the compressor blocked due to condenser temperature alarm (“CSd” code), which requires the instrument to be switched off or the power supply to be cut-off

•the defrosting concluded due to maximum duration alarm (“dFd” code), which requires a key to be pressed.

10	ERRORS
10.1	Errors
CODE	MEANING
Pr1	Cabinet probe error
	Solutions:
	• check that the probe is the NTC type
	• check the integrity of the probe
	• check the instrument-probe connection
	• verify the temperature of the cabinet
	Main consequences:
	• the activity of the compressor will depend on parameters
	C4 and C5
	• defrosting will never be activated
	• the alarm output will be activated (only if parameter u1
	is set at 3)
	• the door heaters will be switched-off (only if parameter u1
	is set at 4)
	• the evaporator valve will be deactivated (only if
	parameter u1 is set at 5)
Pr2	Evaporator probe error
	Solutions:
	• the same as the previous case but relative to the evaporator
	probe
	Main consequences:
	• if parameter P3 is set at 1, defrosting will last for the time
	established with parameter d3
	• if parameter P3 is set at 1 and parameter d8 is set at 2 or 3,
	the instrument will function as if parameter d8 is set at 0
	• if parameter F0 is set at 3 or 4, the instrument will function
	as if parameter is set at 2
	• the alarm output will be activated (only if parameter u1
	is set at 3)
Pr3	Condenser probe error
	Solutions:
	• the same as the previous case but relative to the condenser
	probe
	Main consequences:
	• the overheated condenser alarm (“COH” code) will
	never be activated
	• the compressor blocked due to condenser temperature
	alarm (“CSd” code) will never be activated
	• the alarm output will be activated (only if parameter u1
	is set at 3)
	• if parameter u1 is set at 6, the condenser fan will function
	in parallel to the compressor
ErC	Error of compatibility user interface-control module
	Solutions:
	• check the compatibility user interface-control module
	(check the data related in the labels)
	Main consequences:
	• the control module will keep working correctly
ErL	Error of communication user interface-control module
	Solutions:

•check the connection user interface-control module Main consequences:

•the control module will keep working correctly When the cause of the alarm disappears, the instrument restores normal functioning.

11 TECHNICAL DATA

11.1Technical data

User interface container: open frame board behind a methacrylate sheet.

Control module container: open frame board. User interface protection rating (front): IP 65. Control module protection rating: IP 00.

User interface connections: screw terminal board (at the control module).

The user interface connects to the control module via a 4-way cable: the maximum length allowed for the connection cable is 20 m (65.614 ft; the cable is not supplied with the instrument).

Control module connections: 6.3 mm faston (0.248 in, power supply and outputs), screw terminal board (to the user interface and inputs), 6-pole connector (serial port).

Temperature of use: from 0 to 55 °C (from 32 to 131 °F, 10 ... 90% relative humidity without condensate).

User interface power supply: the user interface is powered by the control module.

Control module power supply: 115 ... 230 VCA, 50/60 Hz, 10 VA. Alarm buzzer: incorporated (in the user interface). Measurement inputs: 3 (cabinet probe, evaporator probe and condenser probe) for NTC probes

Digital inputs: 2 (door micro switch and multipurpose) for normally open/normally closed contact (potential free contact, 5 V 1 mA). Range of measurement: from -40 to 105 °C (from 40 to 220 °F).

Resolution: 0.1 °C/1 °C/1 °F.