The ATL 1000 will not fill the bath in any BW mode, regardless of temp, and even though the manual said i will not start the run under 24C.
To overcome this, you can either fill the bath manually, with the little water button, or you can start the machine on a color process with the lid open and the drum not installed, and keep a thermometer in the first bottle. Once the desired temp have been achieved, turn the machine off, install the tank, set the correct program, close the lid and restart the machine.