THOMSON ECO 15 Notice D'utilisation page 27

The button also turns on or off the circular LED indicator
(which indicates the fan speed) 1 LED means slow speed.
2 LED means medium speed, 3 LED means fast speed.
Timer button
Press repeatedly to set the timer to automatically turn off
the unit between 1h and 8h. Press again to cancel the
timer.
The selected time is indicated by the corresponding
indicator(s).
3. CLEANING AND MAINTENANCE
1. Before cleaning the appliance, switch it off and unplug it
from the mains before cleaning.
2. Do not use chemicals or detergents for cleaning that
could easily damage or deform your appliance.
Use a vacuum cleaner to remove dust from air inlet holes.
Take the filter out of the compartment and remove the
dust around the pre-filter.
Clean the unit with a slightly damp cloth and allow it to
dry.
Never use the unit without the filter.
EN-12