51
EN
*) If the status code is displayed all the time: notify a Fronius-trained service engineer
**) Fault is rectified automatically. If this status code keeps recurring, contact your system 
engineer
Status codes – 
Class 7
Class 7 status codes relate to the control system, the configuration and inverter data re-
cording, and may directly or indirectly affect the process of feeding energy into the grid.
Code Description Behaviour Remedy
701 - 
704
Provides information about the 
internal processor status
Warning message on the 
display
*)
705
Conflict when setting the in-
verter number (e.g. number al-
ready assigned)
-
Correct inverter number in Setup 
menu
706 - 
716
Provides information about the 
internal processor status
Warning message on the 
display
*)
721
EEPROM has been re-initial-
ised
Warning message on the 
display
Acknowledge status code; *)
722 - 
730
Provides information about the 
internal processor status
Warning message on the 
display
*)
731
Initialisation error - USB flash 
drive is not supported
Warning message on the 
display
Check or replace USB flash drive
Check file system on USB flash 
drive; *)
732
Initialisation error - Overcurrent 
on USB flash drive
733 No USB flash drive connected
Warning message on the 
display
Connect or check USB flash 
drive; *)
734
Update file not recognised or 
not present
Warning message on the 
display
Check update file (e.g. for correct 
file name)
*)
735
Update file does not match the 
device, update file too old
Warning message on the 
display, update process is 
interrupted
Check update file 
and if necessary download an up-
date file to match the device (e.g. 
at 
http://www.fronius.com); *)
736 Write or read error occurred
Warning message on the 
display
Check USB flash drive and the 
data contained on it or replace 
USB flash drive
Never unplug a USB flash drive if 
the 'data transfer' LED is still 
flashing or lit; *)
737
File could not be opened
Warning message on the 
display
Remove and then reinsert USB 
flash drive; check or replace USB 
flash drive
738
Log file cannot be saved (e.g. 
USB flash drive is write-pro-
tected or full)
Warning message on the 
display
Create some storage space, re-
move write protection, if neces-
sary check or replace USB flash 
drive; *)
740 Initialisation error - error in file 
system on USB flash drive
Warning message on the 
display
Check USB flash drive; reformat 
on PC for FAT12, FAT16 or 
FAT32 
741 Error during recording of log-
ging data
Warning message on the 
display
Remove and then reinsert USB 
flash drive; check or replace USB 
flash drive