12
ENG
“EVD mini” +0300036EN - rel. 1.2 - 23.04.2018
3. USER
INTERFACE
On models where featured, the user interface comprises the two-
digit display and keypad with three buttons that, pressed alone or in
combination, are used to perform all the configuration and programming
operations on the driver.
Model without display
1
2
Fig. 3.a
1
Red LED - see “Alarms”
2
Green LED - power supply ON
Model with display
GAS Type
Mode
Super Heat
1
3
2
1
2
4
Fig. 3.b
Key
1
Parameter label (for commissioning)
2
Keypad
3
Control ON/OFF digital input status LED
4
flashing/off = DI closed/open (*)
Two-digit display
(*) when the digital input is closed, the LED flashes and control is activated.
During commissioning/setup, the parameter label shows the meaning
of the segments displayed in the first digit, corresponding to the three
parameters being set:
A.
GAS Type: type of refrigerant;
B
. Mode: operating mode;
C
. Superheat: superheat set point.
See the “Commissioning” chapter.
GAS Type
Mode
Super Heat
GAS Type
Mode
Super Heat
GAS Type
Mode
Super Heat
A. Refrigerant
B. Mode (operating mode)
C. Superheat set point
3.1 Keypad
Key
Description
/
UP DOWN
•
Increases/decreases the value of the set point or other
selected parameter
•
menu navigation
PRG/Set
•
at the end of the commissioning procedure, press for 2 s to
exit and activate control;
•
enter/exit control mode, saving the parameters;
•
reset alarm E8
Tab. 3.b
3.2 Display
During normal operation, the two-digit display shows the superheat
measure and any alarms. If used as an analogue positioner, it displays
the 0 to 10 V input value with decimal point. The display interval for the
superheat value is -5 to 55 K (-9 to 99 °F). In general, values between -99
and 999 are displayed as follows:
1.
values from 0 to 10 are displayed with decimal point and decimals;
2.
values greater than 99 are displayed in two steps:
- first, the hundreds, followed by “H”
- then the tens and units.
3.
values less than -9 are displayed in two steps:
- first the “-“sign;
- then the tens and units.
GAS Type
Mode
Super Heat
GAS Type
Mode
Super Heat
123 --->
GAS Type
Mode
Super Heat
GAS Type
Mode
Super Heat
-99 --->
Fig. 3.c
3.3 Programming
mode
The parameters can be modified using the front keypad. Access depends
on the user level: basic parameters (first configuration/setup) and Service
parameters (Installer).
Important:
DO
NO
T
change the control parameters before
completing the commissioning wizard, as described in chapter 4.
Modifying the
S
ervice parameters
The Service parameters include, in addition to the parameters for the
configuration of input S1, those corresponding to the network address,
probe readings, protectors and manual positioning. See the param. table.
Procedure:
1.
press UP and DOWN together and hold for more than 5 s: the first
parameter is displayed: P1 = probe S1 reading;
2.
press UP/ DOWN until reaching the desired parameter;
3.
press PRG/ Set to display the value;
4.
press UP/ DOWN to modify the value;
5.
press PRG/ Set to confirm and return to the parameter code;
6.
repeat steps 2 to 5 to modify other parameters;
7.
(when the parameter code is displayed) press PRG/Set and hold for
more than 2 s to exit the parameter setting procedure.
GAS Type
Mode
Super Heat
Fig. 3.d
Note:
if no button is pressed, after around 30 s the display
automatically returns to standard visualisation.
3.4 Restore factory parameters (default)
It is possible restore the controller to the default settings.
Procedure:
with the controller in standard display mode, press the
three buttons together. After 5 seconds the display shows “rS”. The reset
procedure can
be confirmed within 10 seconds, by pressing PRG/SET buttons
for 3 seconds. If no button is pressed during this time, the procedure will
be cancelled. At the end, the controller displays two dashes and then
awaits the commissioning parameters.
