Checking and cleaning condensate drain

Whenever working on the electrical equipment of the ventilation unit, switch off the mains fuse in the fuse box and secure it against being switched back on. Attach a warning sign to the fuse box to prevent accidental reconnection.

  1. Before opening the front door, wait until the fans have stopped.
  2. First loosen the screws in the outer covers.
  3. Loosen the screws of the middle cover and carefully remove it.

  1. Wipe out the condensate tank.

The condensate lift pump can only be checked with the unit running. To do this, fill the condensate tank with water and check whether the pump extracts this when the unit is switched on.*

* Only for versions with cross-counterflow heat exchanger (variant G).