Self-test
You can run the self-tests of the ventilation unit and read the results of the tests in the Self-test area.
The Self-test display is shown in the figure below:
The result of each test can be one of the following:
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OK — The test was completed successfully.
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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 (see the section called “Error log”).
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Not tested — The test could not be performed.
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(…) — The test has not yet been performed.
To perform a self-test:
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Select Service menu.
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Select the Run tests button on the right bottom corner of the Self-test display.
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The unit will perform a self-test.
The following information is displayed in the Self-test area.
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Temperature sensors — This test reads the temperature sensors of the ventilation unit. The test has five sections:
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Supply air — The temperature of the supply air sensor
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Supply from cell — The temperature of the supply air sensor of the heat recovery cell
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Exhaust air — The temperature of the exhaust air sensor of the ventilation unit
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Outdoor air — The temperature of the outdoor air sensor of the ventilation unit
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Extract air — The temperature of the extract air sensor of the ventilation unit
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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 (see the section called “Cell defrost”). 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.
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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.
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Heater test — This test ensures that the post-heater installed in the ventilation unit is working properly. If no post-heater has been installed, the test result can be Failed.
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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 is Failed.