Troubleshooting Remote Controlled Ceiling Fan

Last week, I came across 2 different model same brand dead ceiling fan. Both models are remote controlled model. Symptom quite similar.

The first model comes with 7 speed but I can only see only 5 TRIACs on the board.
Not sure how it works.

Meanwhile the second model comes with 3 speed and 3 TRIACs available on the board. I assume 1 TRIAC for 1 speed.

While troubleshooting they look like their µC don't have enough power to start. The buzzer give something like repeating click sound. I did measure the µC Vdd/Vss and found out that the voltage is less than 5V.



After a quick search at Google, lead me to aztronics . Similar symptom. So I give them a try.



Desolder the capacitor and measure. Binggo! All caps (regulator part) value is less than they should be.

Replace them all and test with a smaller vent fan.

Done and pass them back to their owner to test with the their ceiling fan motor.

Posted in: ceiling fan, remote controlled, triac