10
4.2
To access internal components
Danger
• Make sure that the mains supply to the unit
is disconnected before performing any
maintenance or electrical work!
Open the hatch with the two latches and swing the hatch
open.
4.3
To change filters
Fig. 3 Changing of filters
The filters cannot be cleaned and must be changed as
necessary. This is normally done 1–2 times per year de-
pending on the air pollution at the installation site.
It is very important to change filters regularly for perform-
ance and energy efficiency of the unit.
Each filter has a label with an part number for identifica-
tion. Provide this number when ordering new filters.
When it’s time to change the filters an alarm is shown on
the control panel display. When this occurs do the
following:
1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 4.2.
3. Remove old filters and insert new ones. Make sure fil-
ters are not mixed up during the replacement process.
Supply and extract air filters may be different.
4. Close and lock the front hatch and connect the unit to
mains.
5. Reset the filter time. See chapter 4.3.1.
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