The broken PCB is the small one on the front of the A/C which accepts input from the infrared remote control.
It also has a physical power button on this PCB which turns the unit on and off with no options.
From the display output on the LED number display on this PCB, it shows the same two lines that would show up if I pushed the physical power button on the PCB.
So my guess is that this manual on/off from the physical button on the PCB is what is getting triggered.
In the middle of the day or the middle of the night, it will act up with a lot of loud beeps and the aircon turning on and off and on and off very fast and it won't stop until I flip the breaker to cut the power.
Then sometimes it will go for several weeks or months with no problem, then it will start again.
I have tried cleaning the contacts of the connectors and it seemed to stop the problem temporarily but it always comes back and it might have only been a coincidence that it worked.
I attached photos of the front and back of the PCB in hopes someone might spot something that might help me fix it.
I have limited electrical knowledge/experience, and I don't have a multimeter or a soldering iron so..... yeah.
Thank you.
(higher resolution photo of the board is here: https://www.yogile.com/koppelacpcb)
View attachment 217804
It also has a physical power button on this PCB which turns the unit on and off with no options.
From the display output on the LED number display on this PCB, it shows the same two lines that would show up if I pushed the physical power button on the PCB.
So my guess is that this manual on/off from the physical button on the PCB is what is getting triggered.
In the middle of the day or the middle of the night, it will act up with a lot of loud beeps and the aircon turning on and off and on and off very fast and it won't stop until I flip the breaker to cut the power.
Then sometimes it will go for several weeks or months with no problem, then it will start again.
I have tried cleaning the contacts of the connectors and it seemed to stop the problem temporarily but it always comes back and it might have only been a coincidence that it worked.
I attached photos of the front and back of the PCB in hopes someone might spot something that might help me fix it.
I have limited electrical knowledge/experience, and I don't have a multimeter or a soldering iron so..... yeah.
Thank you.
(higher resolution photo of the board is here: https://www.yogile.com/koppelacpcb)
View attachment 217804
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