Cleaning, maintenance
The fan is maintenance-free. Nevertheless, check the fan from time to time for bearing noises, damage and disproportionate vibrations. In the event of a fault, contact an authorised specialist installer.
NOTICE: Before removing the upper part of the housing, wait until the impeller has come to a standstill.
Before accessing the connection terminals, switch the service switch to the Off position and secure it against being switched on again.