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10 | Maintenance
Fig. 4 Opening side doors
Open side doors by removing two screws at top and bottom of each door.
4.3 To change filters
Fig. 5 Changing filters
Danger
Make sure that the Mains supply to the unit is
disconnected before performing any
maintenance or electrical work!
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.
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. Pull out the filters towards you. Some force may be needed.
4. Insert the new filters. Make sure that the correct filter types are inserted.
5. Close and lock the front hatch and connect the unit to mains.
6. Reset the filter time. See chapter 4.3.1.
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