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Follow the following instructions to achieve optimal
performance:
Before opening the unit, turn off the power/
pull out the plug and wait until the fans have
stopped completely.
A couple of days after the primary installation, check that
the condensation outlet is working.
Environmental requirements
When repairing or dismantling the unit, statutory
environmental regulations must be observed regarding
recycling and destruction of various materials.
7.1 Unit
Filters
When the alarm “Change filter” flashes in the control panel
display, the filters must be changed. Stop the system by
the circuit breaker of the unit or by the circuit breaker on
the terminal board. Open the front cover/filter drawers
and remove the filters. After having changed the filters,
reset the filter timer. The time interval for cleaning/
changing the filters can be adjusted in the operating menu.
There is a danger of cuts from sharp discs.
The discs must not be damaged.
Vacuum cleaning or using pressurised air on
the filters is not recommended.
Filter performance may be impaired.
G4 = Standard filter
F5 = Fine filter
F7 = Pollen filter
Condensation drain:
When changing the filter in August/September before
the outside temperature falls to 5 °C, check that the
condensation drain is not blocked with dirt and make sure
that there is water in the water trap. Pour 1 litre of water
into the condensation tray and make sure it runs off freely.
If the condensation drain does not work, this could lead to
water damage in the home.
Heat exchanger:
Inspect the heat exchanger every year. If it is dirty, remove
it and:
- Alu-exchanger: Wash in lukewarm soapy water and rinse
using a hand shower if necessary.
- Plastic exchanger: No cleaning with solvents - use only
clean water carefully only careful dust removal from air
intake surfaces
with a household vacuum cleaner.
Fans:
Inspect the two fan wheels for dirt each year. If they are
dirty, they can be washed using a brush, bottle cleaner, etc.
Supply air and extract air valves:
Clean the valves by wiping with a dry cloth. Be careful that
the valves do not turn, so that the air volume changes.
7.2 Alarms
Filter timer
The control has a filter timer to guarantee that the filter is
changed and that optimal operation is established. When
the timer reaches the set value, “Chg. filter” will flash in
the display until the filters have been changed.
When the filters have been changed, the button for the
filter symbol must be held down until ”Alarm!”, “Chg. Filter”
and the exclamation mark disappears and the unit reverts
to normal operation.
Com error
This error appears when there is no communication
between the display and control. Check that the wiring is
correct on terminals 21 to 24.
21 Signal
22 Signal
23 10 Volt
24 0 Volt
Frost protection error
This error message will be displayed if a water reheater is
fitted to the system and the temperature of the water
reheater is too low, causing a danger of frost burst.
The control will stop the system and open the motor-
operated valve to keep the heater warm.
7.3 Dismantling/taking the system out of
service
The following must be done:
The power supply, i.e. the power cables, must be
disconnected. Disconnect the condensation outlet and
power cables for any reheater/preheater. Disconnect
cables for the control panel and dismantle ducts.
If the system should to be taken out of service, the ducts
must be dismantled to avoid condensed water in the
system and in the ducts. Close all supply air and extract air
valves.
7. MAINTENANCE
