8 - EN
4 Maintenance
Zehnder recommends concluding a maintenance
contract with a specialist company. Some companies
offer a maintenance contract in which user maintenance
can also be integrated.
To check whether the unit still works properly, a system
test may be carried out on the unit every six months. A
system test can be started in the SYSTEM TEST menu
(MENU> Login> SYSTEM TEST). If this menu is not
available, a system test is initiated automatically when
the unit is switched on. The system test takes about
5-10 minutes.
Do not disconnect the power to the
unit, unless instructed otherwise in the
manual. This can lead to a build-up of
moisture and results in problems with
mould.
Carry out the maintenance tasks every time
within the period indicated. If you fail to do this,
the performance of the ventilation system will be
affected.
Part of this system
Limit
Person responsible
Procedure
Filter
6 months
User
Replace filters
Valves
6 months
User
Clean valves/grilles
Controls
6 months
User
Clean controls
Condensation drain
6 months
User
Top up condensation drain
Inspecting and cleaning system
2 years
Fitter or service engineer
-
4.1 Replace filters
When indicated you must replace the filters
. The following indication methods
are available:
■
The display on the unit shows the warning message:
REPLACE FILTERS
■
The control can show a message.
The manual of the control contains more information
about the indication on filter replacement.
Replace the filters at least every six
months. This will ensure a comfortable
and healthy air quality and will protect
the unit from pollution.
The warranty is rendered invalid if:
■
Parts are used that have not been supplied by the
manufacturer;
■
The unit is used without filters.
When to replace the filters:
1. Order new filters: Contact your installation company
to order the right filters for you, or order the filters
online at www.international.zehnder-systems.com
2. Once you have received the new filters:
Press the display of the unit for about 4 seconds until
the symbol disappears.
- The child lock is disengaged.
3. Press “MENU”.
- The menu is shown on the display.
4. Press “Filter”.
- The unit enters standby mode.
5. Remove the two filter covers from the unit.
6. Remove the two dirty filters from the unit.
7. Place the two new filters in the unit with the arrows
pointing upwards.
8. Refit the two filter covers to the unit.
Place the click connection of the filter covers on top
of the unit to guarantee an airtight lock.
9. Press the tick box to confirm that the filters have
been replaced.
10. Press the tick box to reset the dirty filter timer.
- The unit resets to normal mode and returns to the
main screen.
11. Fill in the maintenance logbook (if present).
www.international.zehnder-systems.com
4
2-3
