LEGRAND 672 43 Notice D'emploi page 14

Touch Control
How to clean your control
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In order to clean the device, it is possible to temporarily disconnect the
sensitive areas by simultaneously pressing two end areas (see picture).
The LEDs begin to flash sequentially; it is now possible to use a cloth
on the surface of the control without sending any command to the
system.
Normal functioning is restored after 10 seconds if nothing is touched.
Do not clean with solvents, thinners etc. or abrasive products.
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