Eliwell ID 974 Handbuch

THE USER INTERFACE
The user has a display and four keys for
controlling status and programming of the
instrument.
KEYS AND MENUS
UP key Scrolls through the menu items
Increases the values
Activates manual def. function
DOWN key Scrolls through the menu items
Decreases the values
FNC key ESC function (exit)
fnc
SET key Accesses the setpoint
set
Accesses the menus
Confirms the commands
Displaying the alarms
(if actives)
The instrument has two main menus: the
"Machine Status" and "Programming"
menu.
ACCESSING AND USING MENUS
The instrument is programmed by menus.
To access a menu, press and quickly
release the "SET" key ("Machine status"
menu) or press the "SET" key for over 5
seconds ("Programming" menu).
To access the contents of each folder, indi-
cated by the relevant label, just press the
"SET" key once.
You can now scroll through the contents
of each folder, modify it or use its func-
tions. If you do not use the keyboard for
over 15 seconds (time-out) or if you pres-
ence the "FNC" key once, the last value
shown on the display is confirmed and you
return to the previous screen mask.
MACHINE STATUS MENU
To access the "Machine Status "menu,
press and quickly release the "SET" key.
If alarm conditions exist, the "AL" folder
label appears, (see the Diagnostics sec-
tion). Otherwise in normal conditions the
LED
Position Associated function
Compressor or Relay 1
Defrosting
Alarm
Fans
ID 974
electronic controller for "forced air"
refrigerating units
"Set" folder label appears. To view the
Setpoint value, press the "SET" key again.
The Setpoint value appears on the display.
To change the Setpoint value, use the "UP"
and "DOWN" keys within 15 seconds.
If the parameter is LOC = y the Setpoint
cannot be changed.
PROGRAMMING MENU
To enter the "Programming" menu, press
the "SET" key for more than 5 seconds.
If specified, the access PASSWORD will be
requested, (parameter "PA1"), and the
label of the first folder will follow.
To scroll through the other folders, use
the "UP" and "DOWN" keys.
To enter the folder, press "SET". The label
of the first visible parameter appears.
To scroll through the other parameters,
use the "UP" and "DOWN" keys. To change
the parameter, press and release "SET"
then set the desired value with the "UP"
and "DOWN" keys, and confirm with the
"SET" key, to move to the next parameter.
MANUAL ACTIVATION OF THE
DEFROSTING CYCLE
To manually activate the defrosting cycle,
press the "UP" key for 5 seconds.
COPY CARD
The Copy Card is an accessory that con-
nected to the serial door TTL permits both
fast programming of instrument's parame-
ters (download), and the possibility to save
the instrument's parameters (upload) in
order to use them to ri-program other
equivalent instruments. To do this opera-
tion enter the folder identified from
label "FPr" and use parameters "UL" or
"dL" depending on the case; to start
uploading (downloading) simply press
"SET" button.
KEYBOARD LOCKING
The instrument includes a facility for dis-
abling the keyboard, by programming the
"Loc" parameter (see folder with "Dis"
Status
ON for compressor ON, flashing for delay, disabled protection
or activation
ON for current defrosting; flashing for manual activation
ON for an active alarm; flashing for silenced alarm
ON for an active fans
label). If the keyboard is locked, you can
still access the programming menu by
pressing the "SET" key.
The Setpoint can also be viewed.
DIAGNOSTICS
The alarm condition is always signalled by
the buzzer (if present) and by the led of
the alarm icon
The alarm signal produced by a faulty
room probe (probe 1) is shown as E1 on
the instrument display 1.
The alarm signal produced by a faulty
evaporator (probe 2) is shown as E2 on
the instrument display.
The signals for maximum and minimum
alarms do not appear on the instrument
display but are viewable on the "Machine
Status" menu in the "AL" folder, with the
label "AH1" or "AL1".
The regulation of the maximum and mini-
mum temperature alarm refers to the
room probe. The temperature limits are
defined by the parameters "HAL" (maxi-
mum alarm) and "LAL" (minimum alarm).
INSTALLATION
The instrument is designed for flush panel
mounting. Insert the unit through a
71x29 mm panel cut-out and affix with the
U-bracket supplied.
Select a location which will not be subject
to high humidity or condensation and
allow some ventilation to provide cooling
to the instrument.
ELECTRICAL
CONNECTIONS
Attention! Never work on electrical con-
nections when the machine is switched on.
The instrument is equipped with screw ter-
minal boards for connection of electrical
cables with a diameter of 2.5 mm
conductor only per terminal for power
connections). For the capacity of the ter-
minals, see the label on the instrument.
Relay outputs are voltage free. Do not
exceed the maximum permissible current
– in case of higher loads, use a contactor
of adequate power. Make sure that the
supplied voltage matches the values speci-
fied for the instrument.
In the versions supplied on 12V, the power
supply must be provided via a safety trans-
former protected by a 250 mA delayed
fuse. The probes do not have any insertion
polarity and can be lengthened by using a
normal bipolar cable (note that if the
2
(one