The protection circuitry in the subwoofer has been activated.
To protect the product, the power of the subwoofer cannot be turned on. Unplug the power cord from the AC wall outlet and contact the nearest authorized Yamaha dealer or service center.
The playback source does not contain low-frequency signals.
Play back a sound source containing low-frequency signals, and confirm that the sound is output from the subwoofer.
The volume is too low.
Turn up the volume of the subwoofer. For details, see the following:
Clear the area around the front side and the bass reflex port of the subwoofer.
[When the * indicator on the subwoofer flashes.] The center unit and subwoofer are not connected due to a bad wireless communication status.
Move the subwoofer closer to the center unit. If the issue is not resolved, move the subwoofer to a location that supports better communication (one in which the * indicator glows).
If the communication between the center unit and subwoofer is obstructed by a metallic object or another object, change the position of the center unit and subwoofer or change the installation location of the subwoofer.
If there is a device (microwave oven, wireless LAN, etc.) that emits radio frequency signals, move the center unit and subwoofer away from the device.
[When the * indicator on the subwoofer flashes.] The center unit and subwoofer are not paired.
Pair the center unit and subwoofer manually. For details, see the following:
If a wireless connection is not established, the unit may be malfunctioning. Unplug the power cords from the AC wall outlets and contact the nearest authorized Yamaha dealer or service center.
