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28
6
Maintenance
6.1
Maintenance intervals
The Defensor PH28/PH28A can only provide full humidification and purification performance if the unit
is regularly cleaned and the wearing parts are replaced. The maintenance intervals mostly depend
on the load of the ambient air, the water quality and the operating time.
Please consider the intervals for cleaning and replacing the individual components in the table below
as approximate values. If the room air is heavily contaminated the filters must be cleaned/replaced
more often. If the water is very hard the parts in contact with water must be cleaned more often.
every 2 weeks
As soon as the message
Note: If the silver ionisation electrodes are worn, slime will accumulate in the base tub and on the
rotary humidification drum. In this case replace the silver ionisation elec t rodes.
Warning 6
Filter change
appears or at least every 6 month
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