HYDAC FILTER SYSTEMS TCU Series, Operating And Maintenance Instructions Manual

Page: 35 / 64

TransformerCare Unit TCU in operation
Setting the electronic pressure switch (EDS)
The electronic pressure switch, hereinafter referred to as EDS, shows the current
pressure in the degasification and dewatering unit and allows alarm and stopping
pressures to be set.
This documentation only describes the functions required for operating the TCU.
EDS operating elements
Item Designation
1 Indication of the pressure unit
2 4-digit digital display
3 LED display for active switchpoint
4 Buttons for setting the switchpoints, switch-back points
EDS digital display
After switching on the supply voltage, the unit briefly indicates " EDS " and then starts
with the display of the current pressure.
In the basic settings, the display can be changed as follows:

Display of the maximum value " TOP "
The highest pressure measured in the system since the unit was last switched
on or reset is displayed permanently.

Display of the set switchpoint " SP1 ", " SP2 ".
Depending on the variant, switchpoint 1 or switchpoint 2 can be displayed
permanently.

Display dark " OFF ".
The display is switched off.
Depending on the setting, after the activation message, "
TOP ", " SP1 ", " SP2 " or
" OFF " are shown briefly on the display. The current pressure can briefly be
displayed by actuating the button ◄ or ► .
 With the setting "Display current pressure" it is possible to display the maximum
value by pressing the button
◄ or ► .
It is then displayed for 3s. The maximum value can be reset in every display
mode by briefly pressing
◄ and ► simultaneously. This process is
acknowledged by the message " rES " on the display.
HYDAC FILTER SYSTEMS GMBH en Page 35 / 64
BeWa TCU 3472805b en 2011-07-05.doc 2011-07-05