Maintenance and troubleshooting
General maintenance instructions
Scope of
maintenance
Cleaning the interior of the unit
Opening the unit
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To ensure that the unit always meets the technical requirements, preventive maintenance
activities have to be carried out at specified intervals. This can prevent breakdowns and
inefficient operation and maximise the service life of the unit, i.e. to 10 years or more.
It is particularly important to note that maintenance intervals for filters can vary depending on
the specific environment. Moving parts are subject to wear and tear and need to be replaced
when they are worn out, depending on their specific environment.
The factory warranty is only valid if preventive maintenance activities have been carried out
and documented. This documentation can be in form of a written maintenance protocol.
DANGER
Risk of electric shock!
You can be severely injured by an electric shock.
• Always disconnect the unit from the mains by removing the mains plug from the socket
before opening the unit!
The following parts require preventive maintenance:
Maintenance
Task
interval
every 6 months Check the filters. Replace filter(s) if required. User
annually
Changing the filter
every 2 years
Inspecting and cleaning the fans
Inspecting and cleaning the heat exchanger Trained specialist personnel
Inspecting and cleaning the bypass
Cleaning the internal air duct
Checking and cleaning drip tray, drain and
drain hose
Every two years, the unit must be opened to check and clean some components.
Loosen the three screws on the bottom of the unit and remove the front cover.
Fig. 57: Removing the front cover
INSTALLATION AND SERVICE MANUAL FOR PROFESSIONALS
Maintenance and troubleshooting: General maintenance instructions
To be carried out by:
User
Trained specialist personnel
Trained specialist personnel
Trained specialist personnel
Trained specialist personnel