The inverter disconnects automatically from the grid, the grid is then monitored
as specified and the inverter attempts to resume feeding energy into the grid.
Code Description Behaviour Remedy
301 Overcurrent (AC) Short-term interruption
while feeding energy into
the grid.
The inverter resumes its
start-up routine.
*)
302
Overcurrent (DC)
303 DC module overtemperature Short-term interruption
while feeding energy into
the grid.
The inverter resumes with
its startup routine.
Purge cooling air
openings and heat
sink; **)
304 AC module overtemperature
305 No power being fed in, despite
closed relay
Short-term interruption
while feeding energy into
the grid.
The inverter resumes with
its startup routine.
**)
306
PV output too low for feeding
energy into the grid
Short-term interruption
while feeding energy into
the grid
The inverter resumes its
startup routine.
wait for sufficient
level of insolation;
**)
307
DC low
DC input voltage too low for
feeding energy into the grid
IMPORTANT! Due to the low level of insolation early in the morning and in the evening, the status
codes 306 (Power low) and 307 (DC low) are displayed routinely at these times of day. These status
codes do not indicate any kind of fault.
308
Intermediate circuit voltage too
high
Short-term interruption
while feeding energy into
the grid
The inverter resumes its
startup routine.
**)
309
DC input voltage MPPT 1 too
high
311 Polarity of DC strings reversed
313 DC input voltage MPPT2 too
high
314 Current sensor calibration
timeout
Short-term interruption
while feeding energy into
the grid.
The inverter resumes with
its startup routine.
*)
315 AC current sensor error
316 InterruptCheck fail
325 Overtemperature in the connec-
tion area
326 Fan 1 error
327 Fan 2 error
*) If the status code is displayed all the time: notify a Fronius-trained service en-
gineer
**) Fault is rectified automatically. If this status code keeps recurring, contact
your system engineer
103
EN
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