Troubleshooting; Service; Service Reminder; Opening The Ventilation Unit - Swegon CASA W4 Smart Instructions For Use Manual

3.3 Troubleshooting

A ventilation system is a unified whole com-
posed of several system components all of
which influence how the system operates. A
malfunction in ventilation performance could
be caused by any component of the ventilation
system or by the way the system has been in-
stalled. If during the ventilation unit's warranty
period (2 years) after a check (see the check list
enclosed with the installation, operation and
maintenance instructions) there are functional
disruptions in the ventilation unit, you can
register these using the response form at the
address www.casahelp.fi. There are also in-
structions, service videos and frequently asked
questions on the same website. You directly
access a web page with model specific instruc-
tions by reading the QR code on the door of
the ventilation unit with a smartphone.
If a problem or a fault occurs on the ven-
tilation system after the warranty period
(2 years), contact our network of authorised
service companies on www.swegonhomesolu-
tions.com, your real estate company's service
division or another service company that is
fully conversant with ventilation repairs.

4. Service

4.1 Service reminder

The service reminder is activated with preset
time intervals and the
on the control panel's screen. As a factory set-
ting, the service reminder is not in operation.
It can be put into operation under the main
menu item "Diagnostics"/"Service reminder".
The recommended service interval for the
ventilation unit is six months.
When servicing has been performed, the
service reminder is reset from "Alarm" in
the main menu. If you carry out a service
EN
before the alarm is given, you can ac-
knowledge the service reminder from the
"Diagnostics"/"Service Reminder" menu.
4.2 To open the ventilation unit
Before you begin any service work, isolate the
power supply voltage to the ventilation unit
by pulling out its electric plug from the wall
64 www.swegonhomesolutions.com
symbol is displayed
socket. Wait a few minutes before you open
the inspection door of the ventilation unit so
that the fans have time to stop and possible
air heaters have time to cool down.
There is a locking bolt at the edge of the door
and the door is hung on hinges on the W3
and W4 ventilation units. The inspection door
can be opened by turning the lock bolt with
a screw driver for slotted screw heads. Always
turn the ventilation unit's service switch to the
0-position before opening the inspection door.
There is a locking bolt on the top edge of the
W5 ventilation unit door. The inspection door
can be opened by turning the lock bolt with a
screw driver for slotted screw heads. Support
the door on the top edge with the other hand
when you open the door. Tilt the top edge
of the door towards you, and then lift the
door away from its position. The door weighs
about 11 kg.
On the W9 ventilation unit there are two lock-
ing bolts and doors are hung on hinges. Open
the inspection door by turning the lock bolts
with a screw driver for slotted screw heads.

4.3 Filter

The filters should be replaced at least every six
months. The filters may need to be cleaned or
replaced more often in homes where there is
considerable dust or if there are many impuri-
ties in the outdoor air.
In a new home, there is still moisture from
the construction period, and the filters can
become soiled more quickly than usual. The
first filter change should therefore be made
approximately three months after the ventila-
tion unit was commissioned.
The ventilation unit must not be operated
without filters. Use only filters recommended
by Swegon in the ventilation unit. This is
important, as filters with exactly the same
appearance and size can have very differ-
ent pressure losses and filter capacity. If an
incorrect filter is used, it is not certain that
the ventilation unit will work as designed.
Check in the list of components that you have
selected correct filters.