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Preventive maintenance, continued
The following must be checked closely in connection with a preventive maintenance
visit:
• Change the filters and reset the filter timer
• Clean the fan blades every second year with compressed air or a brush
• Make sure that the damper in the bypass module is opening/closing manually with
the trigger
• Clean the drip tray with soapy water and a brush or a cloth
• Check the internal surface inside the unit. If it is dirty, clean with a wet cloth, brush,
or vacuum cleaner
• Make sure that:
- the hose is firmly connected to the unit
- the water trap is filled with water
- the hose is not broken
- the outlet falls 1 % all the way
- the drain is protected against frost all the way
• Clean the heat exchanger with a soft brush and a vacuum cleaner at all four inlets,
• Make sure that all connection are all right and that the controller is clean and free
from dust or moisture
• Turn on power supply, start up the unit and test all fan speeds. Observe that the
unit operates correctly without faults
The factory guarantee is only valid when preventive maintenance can be proven.
Preventive maintenance must be carried out with a minimum time interval of six
months. The documentation of the maintenance should be a written log/journal.
Fill in the journal at every service visit:
Description of the fulfilled service/replacement of parts.
Continued overleaf
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