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The front panel is equipped with a protective foil which must be removed for proper readability
of the panel.
15.2.1 SWITCH
This is an indicator symbol with an integrated button that is used to turn the heater on and off.
If the heater is turned off (but connected to the network), this symbol is slightly backlit to make it easier to
find, for example, in dark places. In the on mode, the icon lights up more intensively together with the current
water temperature on the thermometer.
If several icons on the thermostat are flashing together, this is an error condition, which is described in detail
in Chapter 3.
15.2.2 OPTIMUM
This indicator symbol with a button function is used to quickly set the optimum heater temperature when
the heater achieves the highest efficiency. If the thermostat has the optimum temperature set, this symbol
is also on. If a different temperature is set, then this symbol is backlit slightly.
15.2.3 THERMOMETER
It consists of a total of 9 segments to display temperatures or error conditions. The temperature is displayed
in increments of 5 °C, where the tens of °C (i.e. 10, 20, 30 ...) indicate lighting of only one segment and half
temperatures (e.g.15, 25, 35...) are indicated by lighting of the two closest segments.
If the temperature drops below 10 °C, the lowest segment is flashing. If the temperature exceeds 90 °C,
the highest segment is flashing simultaneously with the other icons.
Other error conditions are indicated by a flashing value on the thermometer together with the other icons.
For a more detailed description of the error conditions, see Chapter 3.
15.2.4 CONTROLLER
It is outlined by two symbols + and - including the touch sensors. The + and - symbols are backlit
and are flashing only in case of an error.
15.2.5 LOGO
The DZD logo is a backlit symbol that indicates active heating. The logo i continuously pulsing as the heater
heats the water. Otherwise, it is slightly backlit.
15.2.6 POWER SAVING MODE
In order to save energy, not all symbols are permanently lit when the heater is on. If nothing is set on the
front panel for more than 2 minutes, the panel automatically enters the power saving mode, where the +
and - symbols go out to adjust the temperature and the intensity of the others decreases. But the functions
do not change. If one of the buttons is pressed, the symbol is lit up again.
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