THE USER INTERFACE
USE OF THE KEYS
The keys of the instrument permit both
the utilisation of the menu and the direct
activation of a function.
USE OF THE MENUS
ACCESS TO THE MAIN MENU
The programming of the instrument is
organised by menu (see Fig. 2, Menu flowchart), which can be accessed by keeping
the key pressed down for the time set
by H02 parameter.
NAVIGATION OF THE MENUS
In order to access the contents of each
folder, just press the key once.
If called for, a password will be required.
There are two different passwords. The
first password (PA1) is for access to the
parameters in the PL1 folder. The second
password (PA2) is for access to the parameters in the PL2 folder. (see Fig. 2, Menu
flowchart).
At this point in the proceedings it is possible to scroll through the contents of each
folder & amend them .
If you do not use the keyboard or hit the
key within 15 seconds, the last value
displayed on the screen is confirmed
and you return to the previous screen.
DESCRIPTION OF FOLDERS
PL1 = user parameters (level 1)
This folders contains the parameters
required by the end user in order to make
any minimum amendments to the programming parameters (see Table 6 and
Table 7).
PL2 = machine parameters (level 2)
This folders contains the parameters
required by the manufacturer and the
assembler for the optimum configuration
of the controlling machine (see Table 6
and Table 7).
St = machine status
In this folder the status of the input 2 can
be viewed; (see Table 4).
RAPID ACTIVATION
Certain specific functions (Setpoint,
defrost) are associated with keys on the
frontlet (see Table 2, Keys and functions
set directly).
DISPLAY AND DEFINITION OF THE SETPOINT VALUE
In order to view the Setpoint value, keep
the key pressed down for the time set
by Pa H02 parameter.
The Setpoint value will appear on the display and the temperature gauge icon will
begin to flash. In order to vary the
Setpoint value operate, within 15 seconds,
on the keys and
If the parameter LOC = y is not possible to
modify the Setpoint.
MANUAL ACTIVATION OF THE DEFROST
CYCLE
Manual activation of the defrost cycle is
achieved by keeping the key pressed
down for “Pa H02” seconds.
KEYPAD LOCK
The instrument anticipates, by means of
appropriately programming the “Loc”
parameter (see Table 6, “Miscellaneous”
parameters), the possibility of disabling the
functioning of the keypad.
In the event the keypad is locked, the user
can always access the programming MENU
by pressing the key
If there is not available to start defrosting,
the defrost LED will blink 5 times
PARAMETERS
The parameters can be viewed in two different tables: the first (see Table 6)
describes the function of the parameter,
while the second (see Table 7) lists the
characteristics of each parameter.
DIAGNOSTICS
The alarm icon indicates an alarm condition. Breakdowns are indicated on the
screen (see Table 5).
When an alarm status occurs, it is possible
to silence the buzzer and/or relay configured as an alarm, by pressing any key.
The buzzer is optional and is present on
the EWDB 111 B model.
EWDB 111
electronic controller for refrigerating units
KEY
DESCRIPTION
UP key
DOWN key
ESC key
ENTER key
FUNCTION
Scrolls through the menu
items
Increases the values
Scrolls through the menu
items
Decreases the values
Returns to the previous
level
Accesses the menus
Confirms the commands
Table 1 Keys and menu
PARAMETER
Pb2
sensor 2
VALUE
sensor 2 value
Table 4 Machine status table
KEY
DESCRIPTION
UP
ESC
DOWN
ENTER
FUNCTION
Activates manual defrost
function
Accesses the setpoint
Accesses the programming menu
Table 2 Keys and functions set directly
Fig. 1 Frontlet of instrument
ICON
INDICATION
alarm active
temperature
range (°F if
icon turn-off)
defrost active
compressor
DETAILS
Permanently lit up in the
event of an alarm, flashing in the event of a
silenced alarm
Flashing in paramete
programming
Permanently lit up in the
event of defrosting in
progress, flashing in the
event of manual defrost
Permanently lit up in the
event of compressor
valve working, flashing in
the event of delay in
activating
Table 3 Icons
BREAKDOWNS
When the sensor detects an error condition:
• the code E1 is displayed
• the compressor is activated as indicated
by the "On" and "Off" parameters:
MINIMUM AND MAXIMUM TEMPERATURE ALARMS
Regulation of the minimum and maximum
temperature alarms refers to the cold cell
sensor.
The temperature limits defined by the
“HAL” (maximum temperature alarm) and
“LAL” parameters (minimum temperature
alarm) are characterised by the “Att” parameter which specifies if they represent the
absolute temperature value or a differential with respect to the setpoint.
When an alarm status occurs, if no alarm
exclusion phases are underway (see alarm
exclusion parameters), the alarm set icon
is lit up and the buzzer, and/or the relay
configured as an alarm, is activated. The
occurrence of this alarm does not in anyway effect the control activities in
progress.
FITTER ASSEMBLY
The instruments belonging to the
DIGIFROST series range have been conceived for panel mounting purposes.
Cut a hole and insert the instrument fastening it with the supplied bracket. The
distance between two coupled devices is
79 mm.
With the appropriate adapter, the instruments can also be assembled on holes for
the standard ELIWELL 32x74 mm. The
panel thickness must be between 0.5 mm
and 7 mm.
The room temperature range admitted for
correct operation is between -5 e 60 °C.
Furthermore, avoid mounting the instruments in locations subject to high levels of
humidity and/or dirt: said instruments are
in fact suitable for use in environments
with an ordinary or normal level of pollution.
Make sure that the area near to the cooling slits is left aerated.
EWDB 111 2/3
PARAMETER
SEt
diF
HSE
LSE
Ont
OFt
dOn
dOF
dbi
OdO
dit
dtU
dCt
dOH
dEt
dPO
dri
Afd
Att
HAL
LAL
PAO
dAO
tAO
AOP
LOC
PA1
PA2
ndt
CAL
LdL
HdL
dLc
dro
H02
H21
H23
reL
tAb
(1) PLEASE NOTE: in the version with the buzzer.
DESCRIPTION
COMPRESSOR CONTROLLER
Setpoint: value ranging between the set minimum (LSE) and the set maximum (HSE).
Operating differential of the setpoint. For applications in the refrigeration sector the compressor
will cut off on reaching the Setpoint value set (on indication of the control sensor), only to
restart at a temperature value equal to the Setpoint plus the differential value.
Note: It will not accept a 0 value.
Maximum value attributable to the setpoint.
Minimum value attributable to the setpoint; normally set at the lowest value measurable by the
sensor.
COMPRESSOR PROTECTION CONTROLLER
ON time of the compressor due to sensor failure.
OFF time of the compressor due to sensor failure.
Start-up delay. The parameter indicates that a protection is active on the realisation of the compressor/general relay.
Delay after shut-down. The parameter indicates that a protection is active on the realisation of
the compressor/general relay. At the very minimum, the time indicated must elapse between
shut-down of the compressor relay and the subsequent start-up.
Delay between start-ups. The parameter indicates that a protection is active on the realisation of
the compressor/general relay. At the very minimum, the time indicated must elapse between
two subsequent start-ups of the compressor relay.
Activation delay of the instrument start-up outputs or after a lack of voltage; expressed in minutes.
DEFROST CONTROLLER
Interval between one defrost cycle and the subsequent one; expressed in hours and in minutes
in relation to the “dtU”.
Time measurement unit for intervals/length of defrosting.
0 = interval between two defrost cycles in hours, duration of defrost cycle in minutes;
1 = interval between two defrost cycles in minutes; duration of defrost cycle in seconds.
Defrost interval reckoning mode.
0 = only the running time of the compressor is counted;
1 = the running time of the instrument is counted;
2 = defrosting takes place every time the compressor shuts down.
Delay in commencement of defrost cycle; expressed in minutes.
Defrost cycle Time out; expressed in minutes or seconds in relation to the “dtU”.
Request for activation of the defrost controller on start-up. y = yes; n = no.
By means of this parameter it is possible to decide if, on request of a manual defrost cycle, the
reckoning for the defrost interval must be set to zero or not. y = yes; n = no.
ALARMS
Alarm/fan set differential: temperature difference between the setting off and disconnection of
the minimum or maximum alarm or of the fans.
Mode of interpreting the value of the HAL and LAL parameters.
0 = interprets the values as absolutes (not referring to the setpoint);
1 = interprets the values as relative with respect to the setpoint.
Maximum temperature alarm. Temperature value whose excess upwards will determine the activation of the alarm signal.
NOTE: To obtain the alarm as relative with respect to the setpoint in case of Att=1 set “LAL” to a
positive value
Minimum temperature alarm. Temperature value whose excess downwards will determine the
activation of the alarm signal.
NOTE: To obtain the alarm as relative with respect to the setpoint in case of Att=1 set “HAL” to
a negative value
Exclusion of the alarms on start-up of the instrument, after a failure in the power supply. In the
event of reactivation of additional delay times the highest among these will be valid.
Exclusion of alarm after defrosting.
Delay time for signalling of temperature alarm.
Indicates the polarity type of the relay/buzzer configured as an alarm.
0 = alarm active and output disabled; 1 = alarm active and output enabled.
MISCELLANEOUS
Keypad lock (blocks the activation of the primary functions). With the keypad disabled, viewing
of the Setpoint is only permitted by means of the key associated with direct functions. However
it remains possible to enter parameter programming and modify the status of the parameter so
as to enable the unlocking of the keypad. n = do not lock; y = lock.
Password 1 (blocks PL1).
Password 2 (blocks PL2).
DISPLAY
Display mode of the temperature on the display.
n = full number; y = decimal number.
Gauging. Positive or negative temperature offset which is added to the value read by the thermostating sensor before being displayed and used for control purposes.
Minimum value of the sensor which can be viewed on the display.
Maximum value of the sensor which can be viewed on the display.
Display mode during the defrost cycle.
0 = displays the temperature read by the cold cell sensor;
1 = displays the temperature read by the cold cell sensor at the time of commencement of
defrosting;
2 = displays the “dEF” label during defrosting. Once defrosting and de-tearing has finished, the
device will continue to display the information anticipated until the cold cell sensor reaches the
setpoint value. If set at zero, the display does not entail the reaching of the setpoint.
°C or °F selection. 0 = °C; 1 = °F.
MACHINE SETTINGS
Key activation time.
Configuration capacity of digital output 1.
0 = disable; 1=compressor; 2 = defrost ( do not use); 3 = fans (do not use); 4 = alarm;
Configuration output buzzer. same as H21.
Release firmware
Table of parameters
Table 6 Description parameters table
DISPLAY
E1
ERROR
Cold cell sensor fault
Table 5 Error table
Ont
0
0
>0
<0
Oft
0
>0
0
>0
Compressor output
OFF
OFF
ON
D.C.
ELECTRICAL
CONNECTIONS
The instrument is provided with screw terminal boards for the connection of wires
with a maximum 2.5 mm
2
section (one
wire only per terminal for power connections).
Always turn the machine off before operating on electrical connections.
Relay outputs are voltage free. Do not
exceed the maximum allowed voltage; in
case of heavier loads use a suitable power
contactor.
Make sure the power supply voltage match
the instrument requirements.
In 12 V powered versions that do not
require probe with reinforced insulation
the power can be supplied through a safety transformer protected by a delayed 250
mA fuse.
Probes require no insertion polarity and
can be lengthened using standard bipolar
cable (please note that longer probes may
cause worse instrument performance in
terms of electro-magnetic compatibility:
maximum care shall be put in cabling).
Probe, digital input and supply cables shall
be kept far from power cables.
In versions requiring probes with reinforced insulation (refer to label on the
rear of the instrument ) probe contacts
are not insulated from power supply.
Therefore probes shall provided reinforced
insulation when they are easily accessible.
Moreover, when such models are installed
on a metal panel, such panel shall be
grounded.
In versions not requiring probes with reinforced insulation probe and power supply
contacts feature a reinforced insulation
from relay contacts. Therefore such contacts (power supply and probe) can be
accessible with no risk provided that
power supply is SELV.
A reinforced insulation shall be provided
between relay contacts and accessible sections.
CONDITIONS OF USE
PERMITTED USE
For safety reasons the instrument must be
installed and used according to the
instruction provided and in particular,
under normal conditions, parts bearing
dangerous voltage levels must not be
accessible.
The device must be adequately protected
from water and dust as per the application
and must also only be accessible via the
use of tools (with the exception of the
frontlet).
The device is ideally suited for use on
household appliances and/or similar refrigeration equipment and has been tested
with regard to the aspects concerning
European reference standards on safety. It
is classified as follows:
• according to its manufacture: as an automatic electronic control device to be
incorporated by independent mounting;
• according to its automatic operating features: as a 1 B-type operated control type;
• as a Class A device in relation to the category and structure of the software.
USE NOT PERMITTED
Any other use other than that permitted is
de facto prohibited.
It should be noted that the relay contacts
provided are of a practical type and therefore subject to fault. Any protection
devices required by product standards or
dictated by common sense due to obvious
safety reasons should be applied externally.
LIABILITY AND RESIDUAL
RISKS
Invensys Controls Italy s.r.l. shall not be
liable for any damages deriving from:
- installation/use other than that prescribed and, in particular, that which does
not comply with safety standards anticipated by regulations and/or those given herein;
- use on boards which do not guarantee
adequate protection against electric shock,
water or dust under the conditions of
assembly applied;
- use on boards which allow access to dangerous parts without the use of tools;
- tampering with and/or alteration of the
products;
- installation/use on boards not complying
with the standards and provisions of current legislation.
TECHNICAL DATA
Frontlet protection: IP65.
Casing: plastic in PC+ABS resin.
Dimensions: frontlet 72x30 mm, depth
45 mm.
Mounting: panel mounted, with drill holes
of 58x25,4 mm (+0,2/–0,1 mm) in diameter.
Room temperature: –5…60 °C.
Storage temperature: –30…75 °C.
Display range: –50…140 °C on a 3 digit +
sign display.
Analog inputs: one standard NTC type supplied or PTC (according to availability).
Digital outputs: 1 SPDT output on relay
(for ... see bal on the instrument)
Temperature range: from -50 to 110 °C
(from –40 to 230 °F).
Accuracy: the best of 0.5% at bottom of
scale.
Definition: 1 or 0.1 °C.
Power consumption: according to the
model
Power supply: according to the model. See
label on the instrument
NOTE: for the optionals, see label on the
instrument.
DISCLAIMER
This manual and its contents remain the
sole property of Invensys Controls Italy
s.r.l., and shall not be reproduced or distributed without authorization. Although
great care has been exercised in the
preparation of this document, Invensys
Controls Italy s.r.l., its employees or its
vendors, cannot accept any liability whatsoever connected with its use. Invensys
Controls Italy s.r.l. reserves the right to
make any changes or improvements without prior notice.
EWDB 111 3/3
Invensys Controls Italy s.r.l
via dell'Industria, 15 Zona Industriale Paludi
32010 Pieve d'Alpago (BL) ITALY
Telephone +39 0437 986111
Facsimile +39 0437 989066
Email info@climate-eu.invensys.com
Internet http:/www.climate-eu.invensys.com
6/2001 ing
cod. 9IS20165
EWDB 111 APPENDIX 1
Table 10 Complete parameters table
PARAMETER
SEt
diF
HSE
LSE
Ont
OFt
dOn
dOF
dbi
OdO
dit
dtU
dCt
dOH
dEt
dPO
dri
Afd
Att
HAL
LAL
PAO
dAO
tAO
AOP
LOC
PA1
PA2
ndt
CAL
LdL
HdL
dLc
dro
H02
H21
H23 (1)
reL
tAb
LEVEL
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
2
2
2
2
2
2
2
RANGE
LSE...HSE
0.3...30.0
LSE..302
-67...HSE
0...250
0...250
0...250
0...250
0...250
0...31
0...250
0/1
0/1/2
0...250
1...250
n/y
n/y
1.0...50.0
0/1
LAL..302
-67...HAL
0...10
0..999
0...250
0/1
n/y
0...255
0...255
n/y
-30...30
-67...302
-67..302
0/1/2
0/1
0…250
0…4
0…4
/
/
DEFAULT
0
2
50
-50
10
0
0
0
0
0
6
0
1
0
30
n
y
2
1
50
-50
2
60
0
1
n
0
0
n
0
-50
110
1
0
5
1
3
/
/
U.M.
°C/°F
°C/°F
°C/°F
°C/°F
min
min
sec
min
min
min
h
num
num
min
min/sec
flag
flag
°C/°F
num
°C/°F
°C/°F
h
min
min
num
flag
num
num
flag
°C/°F
°C/°F
°C/°F
num
num
sec
num
num
/
/
DESCRIPTION
SEtpoint
diFFerential
High SEt
Low SEt
On time compressor
OFF time compressor
dealy On compressor
dealy OFF compressor
delay between interval
Output delay at On
defrost interval time
defrost time unit
defrost count type
defrost Offset
defrost Endurance time
defrost at Power ON
defrost reset interval
Alarm fan differential
Alarm temperature type
High ALarm
Low ALarm
Power on Alarm Override
defrost Alarm Override
temperature Alarm Override
Alarm Output Polarity
keyboard LOCK
Password 1
Password 2
number display type
CALibration
Low display
High display
display Lock
display read-out
Tempo attivazione tasti
Configurabilità uscita digitale 1
Configurabilità uscita buzzer
reLease Firmware
tAble of parameters
PA2
PA1
folder PL2
St
PL2
PL1
Main Menu
ENTER Key
Tab. 4
folder PL2
folder PL1 folder PL1
Tab. 4
1 2 3
5 6 7 8
1 2 3
5 6 7 8
1 2 3 4 5
7 8
1 2 3 4 5
7 8
WIRING
1 - 2 - 3
4 - 5
5 - 6
7 - 8
compressor relay output
thermostatic sensor input
thermostatic sensor input
power supply
Fig. 2 Menù flowchart
Fig. 3 Schema di morsettiera
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