48
Customer service
Operation in
dusty environ-
ments
When operating the inverter in extremely dusty environments:
when necessary, clean the cooling elements and fan on the back of the inverter as well as
the air intakes at the wall bracket using clean compressed air.
738
Log file cannot be saved (e.g.
USB stick is write-protected or
full)
Warning message is shown on
the display
Create storage space, remove
write protection, check or re-
place USB stick if necessary
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
743
Error occurred during update
process
Warning message is shown on
the display
Repeat the update process,
check USB stick
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
745 Update file corrupt
Warning message appears on
the display, update process is
interrupted
Re-download update file
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
751 Time lost
Warning message is shown on
the display
Reset the time and date on the
inverter
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
752
Real Time Clock module com-
munication error
757
Hardware error in the Real
Time Clock module
Error message is shown on the
display; the inverter is not feed-
ing any energy into the grid
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
758
Internal error: Real Time Clock
module is in emergency mode
Time may be inaccurate or lost
(feeding energy into the grid
normal)
766
Emergency power derating
has been activated (max. 750
W)
Error message is shown on the
display
Code Description Behaviour Remedy
IMPORTANT! Contact your Fronius dealer or a Fronius-trained service technician if
- an error appears frequently or all the time
- an error appears that is not listed in the tables
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