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Supply air and exhaust valves
Clean the valves by wiping them with a dry cloth. Make sure
the valve does not rotate and thus cause a change in the air
volume.
Important!
When reinstalling the front plate on the ventilation unit, do
not use power tools to tighten the bolts, as this may result
in damage to the threaded connections. Carefully tighten
all the front-plate bolts until the front plate is firmly
seated on the housing of the ventilation unit.
Reheater
Inspect the reheater for dirt and make sure the plug
connections and heater are intact.
Fan
Check the two fans for dirt. If they are dirty, they can be
cleaned with a brush, bottle washer or similar.
