07/2015
Temperature Difference Controller TDC 3
Page 21 of 47
E.1 Display and input
Example of display symbols:
The display (1), with its extensive text and
graphics mode, is almost self-explanatory,
allowing easy operation of the controller.
The LED (2) lights up green when a relay
is switched on.
The LED (2) lights up red when
operating mode “Off” is set.
The LED (2) flashes slowly red in the
operating mode “Manual”.
The LED (2) flashes quickly
red when an error is present.
Entries are made using four keys (3+4),
which are assigned to different functions
depending on the situation. The “esc”
key (3) is used to cancel an entry or to
exit a menu. If applicable there will be a
request for confirmation as to whether the
changes which have been made should
be saved.
The function of each of the other three
keys (4) is shown in the display line
directly
above the keys; the right-hand key
is generally has a confirmation and
selection
function.
Examples of key functions:
+/-
= enlarge/shrink values
▼
/
▲
= scroll menu down/up
yes/no
= approve/reject
Info
= additional information
Back
= to previous screen
ok
= confirm selection
Confirm
= confirm setting
Pump (rotates in operation)
Valve (direction of flow black)
Collector
Storage tank
Swimming pool
Temperature sensor
Heat exchanger
Warning/error message
New information available