CIARRA CBCS6903 Manuel De L'utilisateur Et D'installation page 12

Installation
5) Put the iron baffle back on the cooker hood and press the lock to the
left.
6) Connect the power and turn the LED lights on/off in order to test
EN
whether the functions are working properly.
NOTE:
 Make sure you remove the tape on the damper and check if the
damper opens and closes freely, otherwise it make noises, and the
cooker hood will be shaking.
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