Troubleshooting SMA Solar Technology AG
50 SWebBox20-IEN110711 Installation Guide
7 The firmware
update for
connected devices
failed.
There is no internet
connection.
• Reestablish Internet access. If
necessary, contact your internet
service provider.
☑ If you have set automatic device
update, the automatic device
update starts again the following
day.
• To start updating the devices
directly, run a manual device update
(see "Executing a manual device
update" (page 39)).
The SD card was removed
during the update process.
• Insert the SD card into the Sunny
WebBox SD card slot again and
perform a manual device update
(see "Executing a manual device
update via SD card" (page 41)).
The update file was not sent
to the devices in the PV plant
after 5 attempts.
• Check the status of the Bluetooth
connection for the devices in your PV
plant Please note that the Bluetooth
connection can also be interrupted
by a lack of DC input voltage. The
DC input voltage can vary
depending on the time of day,
weather or the condition of PV
modules (e.g. covered with snow or
leaves).
– If necessary, improve the quality
of the connection.
– To start the device update
directly, update the device
manually (see "Executing a
manual device update"
(page 39) or "Executing a
manual device update via SD
card" (page 41)).
8The "SD CARD" LED
glows red.
The SD card is full. • Replace the SD card or format the
SD card in FAT 32 format.
The SD card is write-
protected.
• Remove the write protection of the
SD card.
No. Problem Cause Rectification
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