AUX ALCA-NHB Benutzer- Oder Installationshandbuch Seite 66

This function performs a self cleaning the indoor unit. When the 'iClean' function is
activated, the unit operates initially mode cooling fan at low speed during this period
condensing water entrains the powder battery. then the unit switches to heating
mode the fan at low speed, to dry the battery inside the unit. Finally the drive
switches to cooling to finish completely dry.
This button also serves to remove the reminder cleaning air filter, code
'CL' which is activated when the machine reaches the cumulative
operating 360h. Press 10 times the 'HEALTH' button to remove the counter.
To turn off the meter, press the 'HEALTH' button 5 times.
66