07/2015
Temperature Difference Controller TDC 3
Page 27 of 47
4. Operating mode
4.1 Automatic
Automatic mode is the normal operating mode of the controller. Only automatic mode provides
proper controller function taking into account the current temperatures and the parameters that
have been set! After an interruption of the mains voltage the controller automatically returns to the
last operating mode selected!
4.2 Manual
The relay and thus the connected consumer are switched on and off by pressing a key, with no
regard to the current temperatures and the parameters which have been set. The measured
temperatures are also shown to provide an overview and function control.
4.3 Off
4.4 Fill system
In menu “4. Operating modes” the controller can
either be placed in automatic mode, switched off,
or placed in a manual operating mode.
The menu is closed by pressing “esc” or
selecting “Exit operating modes”.
Danger
When operating mode “Manual” is activated, the current temperatures and the
selected parameters are no longer considered. There is a danger of scalding or
serious damage to the system. The operating mode “Manual” may only be used
by specialists for brief function tests or during commissioning!
Caution
When the operating mode “Off” is activated, all controller functions are switched
off. This can lead, for example, to overheating on the solar collector or other
system components. The measured temperatures are still displayed to provide an
overview.
This special operating mode is intended only for the filling procedure for a special
“Drain Master System” with a fill level contact parallel to collector sensor S1. The
instructions on the display must be followed when filling the system. Be sure to
terminate the function when finished!
Caution