Question:
What does FR display mean?
Answer:
This is a kind of timer/operating hours counter that reminds you to change the filter. Now you can look at the filter yourself, if it is still almost unused or has already been replaced, you can continue to use the filter.
Solution:
As soon as you have finished changing or checking the filter, you can reset the counter. To reset the operating hours counter, press and hold the On/Off button for 3 seconds until a signal sounds. This can also be found in the operating instructions on page 77.