Class 3 Status Codes - Fronius Primo 3.0-1 Operating Instructions Manual

Class 3 status Class 3 includes status codes that may occur while feeding energy into the grid, but gen-
codes 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.
Code Description
301 Overcurrent (AC)
302 Overcurrent (DC)
Power stage set overtempera-
303
ture
304 Internal temperature too high
LOW PV OUTPUT
Intermediate circuit voltage too
306
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, the status codes 306 (LOW PV OUTPUT) and 307 (LOW PV
VOLTAGE) are displayed routinely every morning and evening. These status codes do not indicate any kind of
fault.
308 Intermediate circuit overvolt-
age
DC input voltage MPPT 1 too
309
high
313 DC input voltage MPPT 2 too
high
44
Behaviour
Short-term interruption while
feeding energy into the grid
due to overcurrent in the invert-
er.
The inverter resumes with its
start-up routine.
Short-term interruption while
feeding energy into the grid
due to overtemperature
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.
Short-term interruption while
feeding energy into the grid
The inverter resumes with its
start-up routine.
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 engi-
neer
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