If you have a GreenSmart unit and it starts to beep (usually 3 times), it means the unit has gone into "lock-out" mode.  To stop the beeping, you will need to cut the power to the unit.  If you have a green smart remote, you will need to take two screws out that hold the reciever to the panel.  Once removed, just unplug the wires that connect to the reciever.  If you have no GreenSmart remote, just shut the power on the fan control module.  Once the beeping has stopped, please call us and we will come out and take care of the issue.  Thank you for your patience.