32
6.2. Maintenance
To ensure correct operation, efficiency and service
life, the appliance must be maintained in accordance
with the following paragraphs.
6.2.1. Ventilation unit maintenance
The ventilation unit requires little maintenance.
Periodically clean the plastic outside of the unit with a
slightly damp cloth.
The installer must carry out an inspection every 4 years.
On the basis of this inspection, it may be necessary to
clean the impeller. The internal impeller may only be
cleaned by a certified installer.
6.2.2. Maintenance RF control
The wireless control switch is powered by a battery.
Under normal use, the battery has an expected service
life of about 7 years. When the battery is empty, the
control switch no longer functions and the ventilation unit
no longer responds to manual operation. The battery
(type CR2032 3V) must then be replaced. Incorrect
placement of the battery can cause damage to the
product. The batteries must not be exposed to excessive
heat such as direct sunlight, fire, etc. The batteries must
not be exposed to excessive heat, such as direct sunlight,
fire, etc. It is not necessary to register the control switch
again.
6.2.3. Inspection/Cleaning valves
Check the valves regularly (approximately once every 3
months) for contamination. If soiled, clean the valves.
ä Attention
!
When the ventilation system is operating under
severe operating conditions or in an extra polluted
environment, additional maintenance may be
necessary.
ä Attention
!
Pay attention to protruding duct sections when
removing or replacing valves and gratings. These can
be very sharp!
Summary of Contents for 03-00398
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