Eliwell ID 985 User Manual

USER INTERFACE

The user has a display and four buttons
for controlling instrument status and pro­gramming.

At start-up the instrument performs a
Lamp Test; the display and LEDs flash for a
few seconds to check that they are work­ing correctly. The instrument has two main
menus: the Machine Status menu and the
Programming menu.

ACCESSING AND USING MENUS

The resources are arranged in a menu that
can be accessed by pressing and quickly
releasing the “set” button (Machine Status
menu) or holding down the “set” button
for more than 5 seconds (Programming
menu). To access the contents of each
folder indicated by the relevant label, just
press the “set” button once.
You can now scroll through the contents
of each folder, modify it or use its func­tions.
If you do not use the keyboard for over 15
seconds (time-out) or if you press the
“fnc” button once, the last value shown on
the display is confirmed and you are taken
back to the previous screen mask.

MACHINE STATUS MENU
(See Machine Status Menu Diagram)

To access the Machine Status menu, press
the “set” button and quickly release it.
If no alarms are present, the label “SEt”
appears. By using the “UP” and “DOWN”
buttons you can scroll through the other
folders in the menu:

-AL: alarm folder (if alarms present, except
for faulty probes/probe errors and COH);

-SEt: Set point setting folder.

-Pb1: probe 1 value folder;

-Pb2: probe 2 value folder;

-Pb3: probe 3 value folder (if present);

Set setting

Access the “Machine Status” menu, press
the “set” button and quickly release it. The
“Set” folder label appears. To display the
Set point value, press the “set” button
again.
The Set point value appears on the display.
To change the Set point value, use the
“UP” and “DOWN” buttons within 15 sec­onds. If the parameter is LOC = y the Set
point cannot be changed.

Alarm on

If an alarm condition exists when the
Machine Status menu is accessed the “AL”
folder label appears (see section on
“Diagnostics”).

NOTE: Always use the “set” button to
confirm the hours/minutes/days setting.
NOTE2: We recommend considering the
first day d00 as SUNDAY.

PROGRAMMING MENU
(See Programming Menu Diagram)

1) Displaying level 1 parameters

To access the Programming menu, hold
the “set” button for more than 5 seconds.
If specified, the level 1 access PASSWORD
will be requested (see parameter “PA1”)
and (if the password is correct) the label
of the first folder will appear. If the pass­word is incorrect, the display will show the
PA1 label again.
When the instrument is on stand-by, para­meter programming can be accessed with
the display both on and off.
Use the “UP” and “DOWN” buttons to
scroll through the other folders; the fold-

ers will only display level 1 parameters.
NOTE: at this point level 2 parameters
are NOT visible even if NOT password­protected.

2) Displaying level 2 parameters

Go to the “CnF” folder in the
Programming Menu and scroll down the
parameters until you reach the PA2 label.
By pressing and releasing the “set” button
you will enter the level 2 parameters and
the label of the first folder in the pro­gramming menu will appear.
Level 2 parameters can be protected by a
second password (see “PA2” parameter in
“diS” folder, not to be confused with PA2
label in the “CnF” folder). If specified, level
2 parameters are hidden from the user;
when accessing the “CnF” folder the level
2 access PASSWORD will be requested and
(if the correct password is entered) the

Position Associated function Status

Set point/Reduced set point ON for parameter programming level 2

blinking when reduced set point is entered
(set point ON for setting set point)

Compressor or relay 1 ON for compressor on; blinking

for protection delay or enabling blocked

Defrosting ON when defrosting in progress; blinking when activated

manually or by digital input

Alarm ON for active alarm; blinking for silenced alarm

Fans ON when fan is on

aux ON when auxiliary output is operating

ID 985

electronic controllers for “ventilated” refrigeration units

fnc

set

ID985

aux

set

fnc

cod. 9IS44048

rel. 4/06

GB

aux

UP button

Scrolls through the menu items

Increases values

Activates manual defrosting

(see H31 parameter)

DOWN button

Scrolls through the menu items

Decreases the values

Parameter programmable

(see H32 parameter)

fnc button

ESC function (quit)
Parameter programmable
(see H33 parameter

Set button

Accesses Set point
Accesses the Menus
Confirms the commands
Displays the alarms (if active)
Stores hours/min

LEDs

BUTTONS AND DISPLAY

label of the first folder in the program­ming menu will appear.

NOTE: At this point the folders will
only display all the level 2 parameters.

Therefore level 1 parameters will only be
visible if you quit the Programming Menu
and repeat procedure 1).
To enter the folder, press “set”. The label
of the first visible parameter will appear.
To scroll through the other parameters,
use the “UP” and “DOWN” buttons. To
change the parameter, press and release
“set”, then set the desired value using the
“UP” and “DOWN” buttons and confirm
with the “set” button. Move on to the next
parameter.
NOTE: We strongly recommend that you
switch the instrument off and on again
each time parameter configuration is
changed in order to prevent malfunction­ing of the configuration and/or ongoing
timings.

PASSWORD

Passwords “PA1” and “PA2” allow level 1
and level 2 parameters to be accessed.
There are no passwords in the standard
configuration. To enable them (value ≠0)
and assign them the desired value, access
the Programming menu in the “diS” folder.
If passwords are enabled, they will be
requested:

- PA1 when entering the Programming
menu (see the “Programming Menu“ sec­tion);

- PA2 in the “Cnf” folder containing the
level 1 parameters.

FnC FUNCTION FOLDER
The FnC folder (last folder visible from
the Programming Menu, level 1) con­tains the following functions.
They are activated using the “set” but­ton

If the unit is switched off, the function
labels go back to their default status.

ACTIVATING MANUAL DEFROST CYCLE

To activate the defrost cycle manually,
press the “UP” button (if configured =1)
for 5 seconds. If the right defrosting con­ditions are not present (the temperature
of the evaporator probe is higher than the
end of defrost temperature, for example)
or parameter OdO≠0, the display will flash
three (3) times to indicate that the opera­tion will not be performed.

USING THE COPY CARD

The Copy Card is an accessory connected
to the TTL serial port and used for quick
programming of the unit parameters
(upload and download parameter map to

one or more units of the same type).
Operations are described below:

Fr-Format (level 2 parameter)

This command can be used to format the
copy card necessary when used for the
first time or when used with models that
are not compatible. Warning: when the
copy card has been programmed all the
data entered is cancelled when the “Fr”
parameter is used. This operation cannot
be undone.

UL-Upload

This operation uploads the programming
parameters from the instrument.

dL-Download

This operation downloads the program­ming parameters to the instrument.

NOTE:

• UPLOAD: instrument —> Copy Card

• DOWNLOAD: Copy Card —> instr.

The operations are performed by accessing
the folder identified by the “FPr” label and
selecting the “UL”, “dL” or “Fr” commands.
The operation is confirmed by pressing the
“set” button.
If the operation is successful, a “y” is dis­played whereas if it is unsuccessful an “n”
will be displayed.

Download “from reset”

Connect the Copycard with the instrument
OFF
When the instrument is switched on the
programming parameters will be down­loaded; when the lamp test has been com­pleted, the following appear on the display
for about 5 seconds:

• label dLY if copy operation is successful

• label DLn if operation fails
NOTE: after downloading the instrument
will work with the parameter map settings
that have just been downloaded.

KEYBOARD LOCKED

Keyboard operating can be locked by pro­gramming the “Loc” parameter (see folder
with “diS” table). If the keyboard is locked
you can access the Programming Menu by
pressing the “set” button.
The Set point can also be displayed.

ADVANCED FUNCTIONS

DOOR SWITCH INPUT

This is a clean contact digital input with
programmable polarity. The door switch
input functions are controlled by the val­ues of the following parameters:

If activation state forcing is enabled (dOA
is not 0), the compressor and/or fan out­puts can be activated when the time set in
parameters dCO and dFO expires.

Parameter H11 is used to configure the
digital input with values between -9 and
+9. Positive and negative values are used
to select the polarity assigned to the input
and:

NOTE:
the sign “-” indicates that the input is
activated when the contact is closed
The ‘+’ sign indicates that the input is
activated when the contact is open

DEVICE STAND-BY CONTROLLER

This controls the operating mode of the
device when it is on stand by according to
the following parameters:

The Stand-by controller can be digital input
or button enabled if suitably configured.
The status of the instrument when on
stand-by is determined by the value of
parameter H08. Three possible operating
modes are defined:
EXAMPLE 1: the display is off and the con­trollers active, the instrument signals any
alarms by reactivating the display - OFF DIS­PLAY
EXAMPLE 2: the display is off and all the
controllers, including the alarms, are also
disabled - STAND-BY
EXAMPLE 3: the display shows the “OFF”
label and all the controllers, including the
alarms, are also disabled- STAND-BY

DEFROST CONTROL

The instrument can be used to select dif­ferent types of defrosting with the para­meter dty, defrost type.

(defrost execution mode).

The dty parameter can have these values:
0 = electrical defrosting; the compressor is

turned off.

1 = cycle reversing defrosting (hot gas);

the compressor continues operating.

2 = Free mode defrosting (compressor dis

abled).

Configuration of 3

rd

probe as 2nd evap-

orator probe

The 3

a

probe can be used to control the
defrosting of a second evaporator by con­figuring a relay output as a 2nd evaporator
defrost relay (see par. H21…H26).
To implement this function:
a) configure the 3

rd

probe in 2nd evapora­tor defrost control mode (par. H43=2EP).
b) configure a relay output as 2nd evapo­rator defrost relay (configuration parame­ters H21…H26).
c) define the defrost mode by setting
parameter H45.

Start of defrosting

If two evaporators are used, defrosting
starts in three different ways that are

ID 985 2/10

Function

Reduced set point
Aux
Pressure switch alarm reset

**default

Function Label
NOT ATTIVA

SP**
AoF
rAP

Label
function

ACTIVE

OSP
Aon
rAP

Par Description

dOd Digital input switches off loads
dAd D.I. activation delay
OAO Alarm signal delay after disabling the digi-

tal input (door closed)

tdO Time out door open. Time out signalled

when D.I is activated.
(door open)

dOA Forced behaviour from

digital input

PEA Enables forced behaviour from door

switch and/or external alarm

dCO Delay in enabling compressor with

consensus

dFO Delay in enabling fans with

consensus
H11 Digital output configurability/polarity 1
H21...H25 Digital output configurability 1...5

Par Description

PAO alarm exclusion at start-up
OdO Output delay from power-on
H08 Operating mode in stand-by.

determined by parameter H45.

• H45=0: Defrosting is enabled by con­trolling the temperature of the 1st evapo­rator so it is lower than parameter dSt,

•H45=1: Defrosting is enabled by control­ling so that at least one of the two probes
is below its end of defrosting temperature
(dSt for the 1st evaporator and dS2 for
the 2nd evaporator)

• H45=2: Defrosting is enabled by control­ling so that both the probes are below
their respective end of defrosting set
points (dSt for the 1st evaporator and dS2
for the 2nd evaporator)
The probe error condition is considered
the defrost calling probe.
When defrosting is terminated by a probe
or is timed out (see par. dEt), dripping fol­lows (see par. dt).

End of defrosting

If two evaporators are used, defrosting
ends when both the probes have reached
or exceeded their respective end of
defrosting set points (dSt for the 1st evap­orator and dS2 for the 2nd evaporator)
If one or both the probes are faulty,
defrosting is ended by a time-out.

NOTE:

• If there are no conditions for defrosting,
the request is ignored.
Defrosting of a single evaporator ends
when the value read by the respective
probe is equal to or higher than the end
of defrosting temperature or a time-out
occurs. Dripping starts when both defrosts
have been completed.

• If one or both the probes are faulty,
defrosting in the corresponding evaporator
is ended by a time-out.
The start of defrosting is permitted when the
corresponding temperature is lower than the
corresponding set point (dSt or dS2).

• If probe 3 is not configured as a probe
on the second evaporator (H43≠2),
defrosting on the second evaporator
occurs if a digital output is configured to
control defrosting on the second evapora­tor (see par. H21..H25). If this is the case,
defrosting is confirmed (as if ST3<dS2)
and ends with a time-out. The fan con­troller remains unchanged.

GENERAL PRESSURE SWITCH INPUT
CONTROLLER

This controller performs diagnostics on an
associated digital input using a configura­tion table. It is activated by setting para­meters H11 and H12 = 9.
If the pressure switch input trips, the com­pressor loads are immediately deactivated,
the alarm LED lights up to signal tripping
and the label nPA in the alarm folder
appears on the display.
Controlling is performed using 2 parame­ters PEn and PEI:

nPA is a subfolder of AL (Alarms), and
keeps a record of each time the pressure
switch is activated if the value indicated by
PEn is reached in a period of time that is
less than or equal to PEI, the label nPA is
replaced by PA (pressure alarm).
The alarm conditions only occurs when the
maximum number of alarms is reached
before the time indicated by parameter
PEI expires. As soon as the first alarm
occurs, the time PEI is calculated.
If the number of times the pressure switch
is activated exceeds the number estab­lished PEn in the period PEI:

- compressor outputs, fans and defrosting
are deactivated

- the label PA is displayed in the folder AL

- the alarm LEDs and alarm relay if config­ured are switched on.

NOTE: Once the device is in alarm mode,
it must be switched off and on again or
reset by activating the rAP parameter in
the functions menu. The nPA folders can
be reset using the rPA function in the Fnc
folder.

NOTE: If parameter PEn is set to 0 the
function is excluded and the alarms and
counts are disabled.

CONDENSER FAN CONTROLLER

This controller is associated with probe
Pb3 and features:

- operating set point

- operating differential

- exclusion of fans in defrosting mode

- start-up delay after end of defrosting If a
digital output is set as condenser fans
(H21...H24=10) the output will behave as
shown below:

If probe Pb3 is not present and alarm E3 is
active, the controller will always be on
during the defrost cycle.
Probe 3 can be excluded and the failed
connection with the instrument will not
trigger an error message.
NOTE: During dripping time the output is
OFF.
NOTE: If a digital output is programmed
as condenser fans (H21...H25 =10) parame­ter SA3 is always an absolute value irre­spective of the value of parameter Att.

DIAGNOSTICS

The alarm condition is always signalled by
a buzzer (if present) and the alarm icon
LED. The alarms from the faulty thermo­stat control probe (probe 1), the faulty
evaporator probe (probe 2), and the faulty
display probe (probe 3) appear directly on
the instrument display as E1, E2, and E3
respectively.

An error condition in probe 1 (thermostat
control) causes the following:

• E1 code appears on display

• compressor is activated as indicated by
“Ont” and “Oft” parameters if these are
programmed for duty cycle or:

The error condition for probe 2 (evapora­tor) causes the following:

• E2 code appears on display

• end of defrost due to time-out.

The error condition for probe 3 (display)
causes the following:

• E3 code appears on display Other alarms
do not appear on the instrument display
but can be seen in the “Machine Status”
menu in the “AL” folder.
The maximum and minimum temperature
alarm is regulated according to the ther­mostat control probe (probe1) and/or dis­play probe (probe 3). The temperature
limits are defined by the “HAL” (maximum
alarm), “LAL” (minimum alarm) and PbA
(alarm configuration on probe 1,3 or both)
parameters.

MAXIMUM AND MINIMUM TEMPERA­TURE ALARM

If an alarm condition occurs and alarm
exclusion times are not in progress (see
alarm exclusion parameters), the alarm
icon lights up permanently and the relay
that is configured as an alarm is activated.
This type of alarm does not affect the reg­ulating in progress.
Alarms are considered as absolute
(default) values or as values related to the
Set point (the distance from the Set point
itself) and based on the Att parameter.
If the alarms are relative (Att=1), the para­meter HA1 is set to positive values and
LA1 to negative values.
This alarm condition can be viewed in the
folder “AL” with labels “AH1-AL1”.

ALARM WITH THRESHOLD (PROBE 3)

By setting the PbA=3 parameter an alarm
is associated to probe 3. It refers to a spe­cific threshold (defined by the SA3 para­meter). An over-temperature or an under­temperature alarm is generated and the
icon is turned on. This alarm condition can
be viewed in the “AL” folder with the
labels “AH3-AL3”.
When you set parameter PbA=4, probe 3

ID 985 3/10

Par. Description

PEn number of errors allowed per maximum/

minimum pressure switch input switch
input (number)

PEI Minimum/maximum pressure switch error

count time (minutes)

Output Value Pb3 Value

ON

≥ SCF OFF
≤ SCF - dCF

DISPLAY

E1
E2
E3

If simultaneous, they will be showed on the display
alternately every 2 seconds

FAULT

Faulty probe 1 (thermostat control)
Faulty probe 2 (1st evaporator)
Faulty probe 3 (display or 2nd evap­orator)

Table of faulty probes

Ont

0
0
>0
>0

Oft

0
>0
0
>0

Compressor output

OFF
OFF
ON
dc