Self-test

You can run the self-tests of the ventilation unit and read the results of the tests in the Self-testing area.

The Self-testing display is shown in the figure below:

The result of each test can be one of the following:

  • OK — The test was completed successfully.
  • Failed — The test failed. Determine the cause of the problem. You can begin e.g. by checking if any error messages have been registered in the error log.
  • Not tested — The test has not yet been performed or it could not be performed.

To perform a self-test:

  1. Select Service menu.
  2. Select the Start self-test button on the right bottom corner of the Self-testing display.
  3. The unit will perform a self-test.
    The following information is displayed in the Self-testing area.

    • Operating efficiency — This test ensures that the efficiency of the ventilation unit is sufficient.

      If the test fails, the most likely reason is that the heat recovery cell has become frozen and needs to be defrosted. If the heat recovery cell is not frozen, the ratio between the incoming and outgoing air flows may be erroneous. In such a case, contact a qualified specialist.

      Note: Performing the test in summer is not recommended, as the indoor and outdoor temperatures are too similar and therefore unfavourable for testing efficiency. In this case, the test result can be Not tested
    • Heat recovery bypass — This test ensures that the heat recovery cell has been successfully bypassed.
      Note: Performing the test in summer is not recommended, as the indoor and outdoor temperatures are too similar and therefore unfavourable for testing efficiency. In this case, the test result can be Not tested
    • Post-heating — This test ensures that the post-heating resistor installed in the ventilation unit is working properly. If no post-heating resistor has been installed, the test result can be Failed.
    • Additional heating resistor — This test ensures that the additional heating resistor installed in the ventilation unit is working properly. If no additional heating resistor has been installed, the test result can be Failed.