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Maintenance
14 Maintenance
WARNING
Electrocution
If you put your hand, a tool or any object into the ap-
pliance while the power supply is connected, you may
suffer an electric shock.
u Pull the mains plug out of the socket.
Component
Activity
Filter
Check
Replace
Condensate drain
Check
We recommend checking the condensate drain before the onset
of winter.
14.1 Filter
Product
Part
Air type
name
number
FMS EPMC
206610
Extract air G4
65-10
W450/600
FMK EPM1
206596
Outdoor
70-2 W450/600
air
Product
Part
Air type
name
number
FMK EPA 12-2
206597
Outdoor
W450/600
air
If you operate the appliance without filters, it will become dirty.
This will result in loss of hygiene, extra work in cleaning, more
noise and reduced efficiency. Never operate the unit without fil-
ters. Operate the appliance with at least the recommended filter
class. Ensure that filters are fitted accurately so they can func-
tion properly.
u Check the filters for the first time three months after com-
missioning the appliance.
When the total fan runtimes reach the "Filter change interval"
parameter set by a qualified contractor, the programming unit
displays the filter change symbol. The qualified contractor can
lengthen or shorten the interval for checking filters depending
on the level of contamination.
If the qualified contractor has set the option "Volume criterion"
in the parameter "Filter detection mode", the filter change sym-
bol appears once the value set in parameter Filter change
volume has been reached.
u Change the filters when the filter change warning signal
appears.
u Pull the mains plug out of the socket.
u To release the filter cover, press the cover fastening on both
sides of the appliance.
u Pull the filter cover forwards to remove it from the appli-
ance.
u Undo the wingnuts on the filter cover by turning them
through 90°.
60
| LWZ-W 450/600 Premium
Frequency
[months]
Depending on the
set air flow rate
12
6
Filter
Filter
class [EN
class [ISO
779]
16890]
ISO Coarse
65 %
F7
ISO ePM1
55 %
Filter
Filter
class [EN
class [ISO
1822-1]
29463]
E12
ISO 30E
99.9 %
u Push the filter cover upwards slightly and pull it forwards to
remove it from the appliance.
u Grasp the tabs on the front of the filters and remove the fil-
ters from the appliance.
u Change the filters if the surface is covered completely in dirt
or the filter is discoloured throughout.
u Change the filters at least every 12 months.
u Ensure that the filters are installed in the intended position.
Air flows through the filters from top to bottom.
u Slide the filters into the appliance.
u Secure the filter cover on the appliance using the two
knurled screws.
u Carefully push the filter fascia onto the appliance.
u Plug the mains plug into a standard socket.
u After changing the filters, set the "Filter reset" parameter to
"On".
ð The appliance resets the filter runtime to 0. The para-
meter "Filter reset" is automatically reset to "Off". The
filter change warning signal goes out.
u Make a note of the filter change date.
u Order new filters in good time.
u If other filters are installed in the system, e.g. filters in the
extract air vents or a filter box, check these and change the
filters if necessary.
14.2 Checking the condensate drain
The appliance will only function correctly if the condensate
drain is working and is filled. If there is insufficient water in the
condensate hose, the appliance may draw in air through the
hose.
u Open the hose clip fixing the condensate hose to the appli-
ance.
u Pull the condensate hose out of the appliance.
u Check whether the condensate hose is soiled by pouring
water through it.
u Clean or replace the condensate hose.
u Fill the trap in the condensate hose with water before you
fit the hose to the appliance.
15 Troubleshooting
If the appliance registers a fault, this is clearly displayed with a
message. If more than one fault occurs, it is always the most re-
cently occurring fault that is displayed.
In the menu item "Diagnostics" / "Notification list", you can dis-
play a list of the faults most recently registered by the device.
u If you cannot remedy the fault, contact your qualified con-
tractor.
u To facilitate and speed up your enquiry, please provide the
qualified contractor with the number from the type plate.
Connection errors
Fault
Possible cause
The ventilation unit
Pairing was not
cannot be controlled
completed.
via WLAN.
There is no WLAN
connection.
Remedy
Check whether the
WLAN symbol is dis-
played on the ventil-
ation unit's pro-
gramming unit.
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