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5.0 START-UP AND CONTROL PANEL
Electronic expansion valve ExV synoptic
1. Valve opening percentage
2. Valve opening steps
3. Valve status:
-
Init
: driver initialization
-
Close
: valve closed
-
Off
: valve in standby
-
Pos
: valve in positioning
-
Wait
: valve in activation
-
On
: valve in control
-
LoSH
: Low SH function running
-
LOP
: LOP function running
-
MOP
: MOP function running
-
HiTc
: HiTc function running
4. Current set point
5. Regulation values:
-
Suction superheat
-
Discharge superheat
-
Discharge temperature
the arrow indicates the reference value for the set point (i.e. what control is based on - suction SH, in the figure).
Plant synoptic
1. Pump and flow switch status
2. Input and output water temperature
3. Control set points and unit percentage request
5.3.1.3 ON-OFF MENU:
The unit can be turned on and off from the user menu (using the parameter with code
Q000
) and the status can be displayed.
The On status requires the following consensus:
-
digital input (if enabled)
-
keyboard from the On-Off menu
-
time bands (if enabled)
-
BMS (if enabled)
Before switching from On to Off, EKapt goes through the transitory shutting down status where the controller shuts down the compressors
following the shutdown procedure and then shuts down pumps and fans.
Switching the unit on and off
The following table gives a brief description of the procedure for switching on or off the unit using the keyboard, from the On/Off Menu.
Switching the unit on or off
Starting from a situation in which electrical voltage
has been supplied to the chiller and the software is
loaded, we find ourselves on the main menu of the
microprocessor.
Using the UP and DOWN keys, go to the main screen
to display the switch-on symbol (as shown in the
figure at the side) and press ENTER.
Now we find ourselves on the unit On/Off submenu.
It is possible to change the unit status from off to on
and vice versa using the UP and DOWN keys.
After pressing the UP key, simply press ESC to return
to the main menu.
