My old Sanyo SAP-KRV123EHA had a noisy ball bearing in the indoor fan unit. Since Sanyo is no longer making these units I tried replacing the fan bearing with ceramic ones. After assembling the motor, it can spin freely when no power is on, but a humming sequence can be heard when powered by the control PCB. And the motor seems to be braked to stand still. My guesses are:
1) I broke a wire to the hall sensor
2) the capacitor is fried, but it shouldn't get firmly stuck because of that?
Any other ideas? Before I start chasing a new motor.