Fronius Symo x.x-3-S - Manuale (Pagina 46)

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Class 3 status
codes Class 3 includes status codes that may occur while feeding energy into the grid, but gen-
erally do not cause the process to be interrupted for any length of time.
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.
*) 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
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 open-
ings 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 start-
up 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 start-
up 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 connection
area
326 Fan 1 error
327 Fan 2 error