Class 4 Status Codes - Fronius Primo 3.0-1 Instructions De Service

The inverter disconnects automatically from the grid, the grid is then monitored as spe-
cified and the inverter attempts to resume feeding energy into the grid.
Code Description
301 Overcurrent (AC)
302 Overcurrent (DC)
Power stage set overtemper-
303
ature
304 Internal temperature too high
LOW PV OUTPUT
Intermediate circuit voltage
306
too low for feeding energy
into the grid
LOW PV VOLTAGE
307 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
(LOW PV OUTPUT) and 307 (LOW PV VOLTAGE) are displayed routinely at these times of day. These
status codes do not indicate any kind of fault.
308 Intermediate circuit over-
voltage
DC input voltage MPPT 1 too
309
high
313 DC input voltage MPPT2 too
high
Class 4 status Some of the class 4 status codes necessitate intervention by a Fronius-trained service
codes technician.
Code Description
Unable to communicate with
401
the power stage set
Power stage set temperature
406
sensor faulty
Internal temperature sensor
407
faulty
Direct current feeding in
408
detected
44
Behaviour
Short-term interruption while
feeding energy into the grid due
to overcurrent in the inverter
The inverter resumes with its
startup routine.
Short-term interruption while
feeding energy into the grid due
to overtemperature
The inverter resumes with its
startup routine.
Short-term interruption while
feeding energy into the grid
The inverter resumes with its
start-up routine.
Short-term interruption while
feeding energy into the grid
The inverter resumes with its
start-up routine.
Behaviour
The inverter will automatically
attempt to connect again and, if
possible, will resume feeding
energy into the grid.
Remedy
Fault is rectified automatically;
if this status code is displayed
all the time: Notify a Fronius-
trained service engineer
Purge openings for cooling air
and heat sink if necessary;
fault is rectified automatically;
if this status code keeps recur-
ring, contact your system engin-
eer
Fault is rectified automatically;
if this status code occurs when
there is sufficient insolation,
contact your system engineer
Fault is rectified automatically;
if this status code is displayed
all the time: Notify a Fronius-
trained service engineer
Remedy
If the status code is displayed
all the time: Notify a Fronius-
trained service engineer