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Daikin IR remote ARC452A3 not communicating

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    Daikin IR remote ARC452A3 not communicating

    Hello everyone.
    I have this remote that turns on and does everything is supposed to do, but not communicating with my AC unites. With other remote (same model) everything is ok.
    Weird thing I have a IR tester and the remote signal is detected even from far away. I checked with my phone camera as well and I can see the light clearly every time I push a button. I opened both remotes (working and not) and all the values are the same on the main capacitors, led transmitter and even the frequence on the crystal. Of course I even changed the batteries and give it a good clean with isopropyl alcohol.
    At this point I have no clues what the problem could be, help 😅
    I know it's cheap to buy a new one, but I wish I could understand where the problem is. Thanks!

    #2
    try checking the frequency of the signal at the led pins while holding a button

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      #3
      Ok, I'll try it. I'll take a Pic of the pcb as well and post it

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