Electra air conditioner doesn't bip anymore when using the remote control

[polonskyg]

Hi everybody! I've an air conditioner split Electra (the model that comes with 4 lights in the lower right corner in the indoor unit).
Yesterday the air filter light turned on (the most right one). I took them out and clean them, then I put them back and pressed the reset button for 5 seconds in the indoor unit. The problem is that now each time I use the remote control despite it works, it doesn't make the bip anymore.
Someone has any idea why?
BTW, the air filter has any special way to put it back? I believe when I took them out the effort was bigger than when I put them back...
Thanks in advance! Guillermo.

[chemi-cool]

Even in Electra mini split, the filter doesn't get bigger after you wash it...

The "bip" is made by a small black beeper on the electronic board with the 4 lights.
I would not replace it as long as the other functions work well.

Every output from the remote to the unit makes the green light flash so you know that the output turned into input.