46
Class 7 status
codes
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
502
Insulation error on the solar
modules
Warning message is shown on
the display
If this status code keeps recur-
ring, contact your system engi-
neer.
509
No energy fed into the grid in
the past 24 hours
Warning message is shown on
the display
Acknowledge status code;
check whether all the condi-
tions for the problem-free feed-
ing of energy into the grid have
been met (e.g. are the solar
modules covered with snow)
If the status code is displayed
all the time: look out for further
status codes
515
Unable to communicate with
filter
Warning message on the dis-
play
If the status code is displayed
all the time: Notify a Fronius-
trained service technician.
516
No communication possible
with the storage unit
Storage unit warning message
517
Power derating caused by too
high a temperature
When power derating occurs, a
warning message is shown on
the display.
Purge openings for cooling air
and heat sink if necessary;
fault is rectified automatically;
if this status code keeps recur-
ring, contact your system engi-
neer
522 DC low String 1
Warning message on the dis-
play
If this status code keeps recur-
ring, contact your system engi-
neer.
523 DC low String 2
558
Functional incompatibility (one
or more PC boards in the in-
verter are not compatible with
each other, e.g. after a PC
board has been replaced)
Possible error displays or mal-
functions on the inverter
If this status code keeps recur-
ring, contact your system engi-
neer.
560
Power derating caused by
overfrequency
This status code is displayed
when the grid frequency be-
comes excessively high.
The inverter will then reduce its
output.
The status indicator will contin-
ue to be displayed until the in-
verter has returned to normal
operation.
As soon as the grid frequency
is back within the permissible
range and the inverter has re-
turned to normal operation, the
fault is rectified automatically.
If this status code keeps recur-
ring, contact your system engi-
neer.
566 Arc detector switched off
(e.g. during external arc moni-
toring)
The status code is displayed
every day until the arc detector
is reactivated.
No error
Confirm status code by press-
ing 'Enter'
Code Description Behaviour Remedy
705
Conflict when setting the in-
verter number (e.g. number al-
ready assigned)
-
Correct the inverter number via
the Setup menu
721
EEPROM has been reinitial-
ised or EEPROM is faulty
Warning message is shown on
the display
Acknowledge status code;
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
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