Troubleshooting
Problem Possible cause Potential solution
USB/SD Storage device
not detected
Device does not comply with
USB mass storage
specifications.
Use a device that complies with
the USB mass storage class.
Note: some audio players,
included in the class of image
devices are not supported. Also
some flash card readers cannot
be detected.
USB hub in use. Some USB hubs will not
operate properly. If this is the
case, try using a different USB
hub or connecting the storage
device directly to the USB port.
Note: if multiple USB storage
devices are connected through
a USB hub, only one of the
storage devices will be
recognized.
Format not supported. Use only FAT16 or FAT32
format.
The connection to the unit is
terminated due to USB port
power supply current overload.
Wait several minutes. The
rating (allowable current) for
this unit is 500 mA maximum.
Only use USB storage devices
that meet these standards. If
the USB port is shorted for a
long time, it will be damaged.
Partitioning of the SD card or
USB device is wrong.
Reformat the USB or SD card
with a PC that is known to give
good results.
MP3 or AAC tracks
cannot be played
Format not supported. See section Internal music unit,
page 32 on supported formats.
Note: MP3 format is supported
up to 320 kbps.
Files are copy protected. Copy protected files cannot be
played on this unit.
No sound output
Audio cables are loose and/or
not connected properly.
Check to ensure the audio
cables are securely connected
to the unit.
Audio mixer is not working
correctly.
Check the music source
selector and volume settings on
the audio mixer.
9
42 en | Troubleshooting Plena All-in-One System
2014.09 | V1.2 | Installation and Operating Manual Bosch Security Systems B.V.
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