SilverCrest SFK 16 B2 Instructions De Montage, D'utilisation Et Consignes De Sécurité page 52

the function of the product may be affected. In
this case, please unplug the receiver from the
mains socket outlet for approximately 2 minutes.
Then proceed again as described in the section
"Synchronising the transmitter / receiver".
Electrostatic discharges may lead to malfunctions.
If such malfunctions do occur, unplug the receiver
from the mains socket for approximately 2 minutes
and plug in the mains socket again. Then proceed
again as described in the section "Synchronising
the transmitter / receiver".
Cleaning and maintenance
Before cleaning unplug the product from the
power supply.
Under no circumstances should you use
liquids or detergents, as these will damage
the product.
52 GB/IE