Doors/Windows Bang When Opened - Viessmann Vitotronic 200 Operating Instructions Manual

"A0 Vent.: check filter(s)" is displayed
Cause
The filters in your ventilation unit and/or in your ex-
■
tract air vents are severely contaminated.
The time interval for changing the filters has expired.
■
Doors/windows can only be opened with difficulty
Cause
In highly airtight buildings, e.g. a passive house:
The air flow rates for supply and extract air in your ven-
tilation unit are out of balance.

Doors/windows bang when opened

Cause
In highly airtight buildings, e.g. a passive house:
The air flow rates for supply and extract air in your ven-
tilation unit are out of balance.
Remedy
Clean or replace the filters: see page 63 onwards.
Remedy
Notify your contractor.
Remedy
Notify your contractor.
What to do if...
61