How do you hard disable the air conditioner beep?

1.Simply switch off the power supply to the AC for 5 minutes. Check for AC beep sound. Again switch it on. If beep sound still persists, contact the corresponding AC operator.

2.Sensor may be beeping to indicate that the power is out. Check your home's circuit breaker to ensure it has not tripped. If it has, reset the breaker. Even if the breaker has not been tripped, flip it on and off again to reset the system and see if this eliminates the air conditioner beeping noise. 

3.There is a dip switch that controls all that type of stuff, either in the remote or in the unit. You need a schematic to figure out what is causing the circuit to make the chime. Either turn off the speaker or disengage the chime circuit. There may be info in the spec plate on the unit as well.