18
• Keep the unit surface free from dust.
• Clean the filters with a vacuum cleaner following the following illustrations (fig.8 f-g-h-i) when the FILTER signal is displayed on
LCD. Their maintenance may differ per situation depending on the internal and external environmental conditions. Press FILTER
button (Fig.7.b - ) to reset the Filter Alarm. Filters must be replaced every year.
• Clean the fans every year with a vacuum cleaner. This may differ per situation depending on internal and external environmental
conditions and on frequency of filter cleaning. Do not move the balance clips of the fan (fig.8 f-j-k-l).
• Clean the heat exchanger every year with a vacuum cleaner. This may differ per situation depending on internal and external
environmental conditions and on frequency of filter cleaning. To remove the heat exchanger unlock the specific bracket by
turning the yellow screw (fig.8 f-j-k-m-n-o).
8.4 Service
WARNING
Make sure that the mains supply to the unit is disconnected before performing any installation, service, maintenance or
electrical work!
WARNING
The installation and service of the unit and complete ventilation system must be performed by an authorized installer and in
accordance with local rules and regulations.
L
Fig. 8.i
Fig. 8.h
Fig. 8.g
Fig. 8.f
Fig. 8.l
Fig. 8.m
Fig. 8.j
Fig. 8.k
