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8.7 Display during mains power failure
Operation
The illustration on the right shows an example of a display with the mains voltage activated.
Fig. 19: Display during normal operation
Fig. 20: Display during mains power failure
The illustration above shows the display during a mains voltage failure or the control element unplugged. Prerequisite, however, is that the temperature controller was charged previously for several hours.
The flashing plug symbol (see magnification) shows that the mains voltage supply to the temperature controller is deactivated. The time continues to run in the background, but is not displayed to save energy.
If the temperature controller is again supplied by the mains network within a period of 10 hours, the current time will be shown in the display.
Operation of the unplugged control element
If the control element (the temperature controller) was unplugged for programming, the menu level must first be called up with a long press of the button.
Operation is then carried out as normal.
Product manual 2CKA001473B8291
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