41
Filter monitoring and changing
The rate at which the filter becomes dirty is essen-
tially dependent on the conditions under which the
appliance is installed and operates.
Dirty filters reduce the air-flow through the appli-
ance. Slightly soiled filters should be freed of dust
and replaced in the appliance. Heavily soiled filters
should be completely replaced with new ones.
The appliance is factory set to prompt a filter change
after 2000 hours of operation. This is done by
means of a 3-time ring, which repeats every 5 min-
utes. Replace the filter according to chapter „Care
and maintenance“.
Reset the operating hours to 0 as follows:
1. Remove the appliance plug from its socket.
2. Set the fan regulation rotary knob to 1 (lowest
setting)
3. Plug the appliance back in, a ringing tone sounds
in short intervals for a maximum of 2 minutes.
4. Set the fan regulation rotary knob to 6 (highest
setting). The ringing tone stops.
6. Set the fan regulation rotary knob to the required
speed.
Condensate indicator and emptying the
condensate sump
The condensate indicator (
5
) is located at the bottom
of the left hand side panel. The float in the observation
glass indicates how full the sump is. If the float is at
the top of the glass, the sump must be drained. To do
this, remove the front panel and the sealing panel.
Having done this the condensate can be drained from
the sump using the rear drain tube. To do this, remove
the rear tube from the condensate indicator tube and
pull it forwards out of the appliance. Then hold the end
of the tube down below the level of the sump so that
the condensate can drain off into another vessel.
Cleaning the external wall ducting
In order to clean the air ducting in the external wall,
the ventilation module (C, Fig.8) must first be com-
pletely removed from the appliance. To do this, unplug
the appliance, pull off the front tube to the (previously
drained) condensate sump and pull off the rotary
knobs in the left hand side panel. After this, the venti-
lation module can be pulled forwards out of its spring
locks (F, Fig.8).
The parts are to be replaced in the reverse order to
which they were removed. The following important
points are to be complied with here:
•
The cable on the left hand side must not run be-
hind the ventilation module, but must run along
the side of it.
•
The ventilation module must sit flush on the rear
panel of the appliance. To do this, set the ventila-
tion module on the appliance floor plate (G, Fig.8)
and push it into a position in which the spring
locks on both parts are facing each other. Then
push the ventilation module into the spring locks.
•
Replace the condensate sump indicator.
•
Replacing the rotary knobs. When replacing the
rotary knobs, ensure that the profile of the inside
of the rotary knob fits with that of the regulator
spindle. The operation mode switch must be re-
placed in the fresh- and exhaust-air position.
•
Replacing the front panel. When replacing the
front panel make sure that the 4 countersunk
screws (Fig.1, Pos.2) fit into the keyholes in the
front panel. Push the front panel downwards as
far as it can go.
