What do the alert icons on the LCD screen mean?
The LCD screen displays two main alerts: a Filter alert, which means the filter isn't fitted correctly or needs cleaning, and a Blockage alert, which means your machine has a blockage that needs removing. A low run time icon will also appear when the battery needs charging, and a red warning icon appears when the battery is empty. (Page 5)
From the official Dyson V10 Cordless Stick Vacuum manual, page 5
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