The lightning bolt will only be present on the screen during the programmed hours for hot water and if the tank temperature is below the target temperature.
For example, if the cylinder is programmed not to heat during the period of 21:00 - 23:00 the lightning bolt symbol will not be displayed on the screen. However would appear back if programmed to heat from 23:00 - 00:00, and that there is a demand for heat.
Applicable Models:
EDL170-520RF, EDL200UK-630RF, EDL270UK-630RF
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