The CI70 control panel shows nothing – what could be wrong?
If the CI70 control panel does not display anything at all, the most common cause is a wiring issue. Start by checking that the positive and negative connections are correctly connected. Pay special attention to the fact that when using the short direct cable above the unit, the colour coding for positive and negative is reversed, which can easily lead to incorrect wiring. Also check that the T15 connector on the circuit board is securely connected inside the unit. Finally, make sure the unit is powered and properly connected to the mains supply. If the panel still shows nothing after these checks, we recommend contacting the service company that installed the system or the retailer where the product was purchased.
The control panel on my CI 70 is flashing – how do I stop it?
A flashing light on the CI 70 means that there is an active alarm in the ventilation unit. To stop the flashing, you must first identify which alarm is active and correct the underlying issue. Once the fault has been resolved, the alarm can be reset and the flashing will stop. Instructions for checking active alarms and resetting them are described in the user manual for the CI 70.
There is more noise or air rushing sound from the vents after I changed the filters – is this normal?
Yes, this is completely normal. New and clean filters allow more air to pass through than old and dirty filters. When the airflow increases, it can result in more rushing or airflow noise in the vents. This indicates that the ventilation system is once again operating as intended after the filter change.
There is poor airflow in my ventilation system – what could be the cause?
Poor airflow is often caused by filters not being replaced in accordance with Flexit’s recommendations. The ventilation unit contains two filters, and it is important that both are replaced at the same time. Always use quality filters that are tested and adapted to your specific unit. Clean and correct filters ensure proper airflow, reliable operation, and longer service life of the system.
There is ice and condensation on the ducts above my ventilation unit – what is the cause?
Ice and condensation on the ducts above the ventilation unit are usually caused by incorrect or insufficient insulation of the ducts. When warm, moist air comes into contact with cold surfaces without adequate insulation, condensation can form and freeze into ice in cold environments. For correct insulation, the applicable installation instructions for the product must be followed. It is also recommended to contact the company that installed the system so they can inspect the installation and correct any faults.
There is suction in the hole on the combination box installed in our home – what is the cause?
If there is suction in the hole on the combination box, the most likely cause is that the box has not been installed correctly. For example, the ducts may be connected incorrectly, with supply air and extract air swapped. This must be checked and corrected by the installer to ensure proper operation of the ventilation system.
Is there sufficient service clearance around the ventilation unit?
The required service clearance around the ventilation unit is specified in the installation manual for the relevant product. The stated dimensions represent minimum requirements and only account for the space needed for service and maintenance. It is recommended to allow additional space where possible, to make inspection, filter replacement and other maintenance tasks easier over time.
Is EcoNordic both a heating system and a ventilation system in one solution?
EcoNordic is an indoor climate unit that combines multiple functions in a single integrated solution. It provides balanced ventilation, space heating and domestic hot water. This means EcoNordic can replace separate systems for ventilation and heating, offering a comprehensive and energy-efficient solution for indoor climate and comfort.
Are duct sizes and pressure losses in a Flexit-designed ventilation system optimised to avoid noise and unnecessary energy loss?
Yes. A ventilation system designed by Flexit is dimensioned with duct sizes and pressure losses optimised to meet applicable requirements for noise levels and energy efficiency. At the same time, the solution is adapted so that the ductwork occupies as little space as possible within the building structure. This is provided that the system is installed and balanced in accordance with the design documentation.
I cannot control the unit with the CI60/CI600 control panel – what could be wrong?
If you are unable to control the unit with the CI60 or CI600 control panel, the most common cause is a lack of communication between the panel and the unit. Start by checking the green LED on the circuit board inside the unit. It should flash rapidly green, approximately 5 times per second. If it does not flash, communication is likely missing. Next, disconnect any additional equipment such as humidity or CO₂ sensors to rule out conflicts. Then test by connecting the control panel directly to the short cable above the unit to eliminate issues with extension cables or junction boxes. Also check that the flat cable inside the control panel is securely connected and not damaged. After each change or reconnection, the unit must be restarted for the control panel to be correctly detected. If the issue persists, we recommend contacting the retailer where the product was purchased or the service company that installed the system.