What does it mean when all warning icon lights are flashing simultaneously?

All warning icon lights flashing indicates an error that requires a machine reset — unplug the machine and plug it back in. Before switching back on, remove the AquaClean filter, ensure the water tank is fully seated, and check if the pre-ground coffee compartment is clogged. If the lights continue to flash after these steps, the machine may be overheated; switch it off, wait 30 minutes, and try again. (Page 19)