15
ZCTBTS9050
(04/19)
Symptom
Cause
Solution
No Power
AC plug not plugged into wall
outlet
18V Battery is not charged
No battery connected to unit
Plug into wall outlet properly
Charge the battery
Insert charged battery
No Sound
Volume set too low
Sound output of the
connected device set too low
(AUX IN & Bluetooth Mode)
Adjust volume to desired level
Adjust volume of connected
device
Sound Distortion
Volume level set too high
Volume level of the connected
device too high (AUX IN &
Bluetooth Mode)
Reduce volume level by the
VOL knob.
Reduce the volume level of
the connected device
Bluetooth Reception
Failure
Not properly connected via
Bluetooth
The connected device is not
in playback mode
Check that Bluetooth is
activated on your device and
retry connection
Play the music in the
connected device
18 V Cordless Speaker Troubleshooting
