Code
Description
IMPORTANT! Status codes 306 (LOW PV POWER) and 307 (LOW PV VOLTAGE) appear naturally every
morning and evening due to low solar irradiance. These status codes are not the result of a fault.
308
Intermediate circuit overvolt-
age
DC input voltage for MPPT 1
309
too high
313
DC input voltage for MPPT 2
too high
Class 4 Status
Class 4 status codes may require the intervention of a trained Fronius service technician.
Codes
Code
Description
No internal communication
401
with power stage set.
Power stage set temperature
406
sensor defective
Internal temperature sensor
407
defective
408
DC feed-in detected
The "fixed voltage" setting has
been selected instead of MPP
412
voltage operation and the volt-
age is set to a value that is too
low or too high.
Safety cut-out has been trig-
415
gered by option card or RE-
CERBO
No communication between
416
power stage set and control
unit
417
ID problem with hardware
419
Unique ID conflict
421
HID range error
Communication with the power
425
stage set is not possible
426 -
Possible hardware defect
428
431
Software problem
Function incompatibility (one
or more PC boards in the in-
436
verter are not compatible with
each other, e.g.,after PC board
replacement)
437
Power module problem
Details
Brief interruption of grid power
feed operation.
The inverter returns to the
Startup phase.
Details
The inverter will automatically
attempt to connect again and,
if possible, resume grid power
feed operation.
-
Inverter does not feed energy
into the grid.
The inverter will automatically
attempt to connect again and,
if possible, resume grid power
feed operation.
Inverter does not feed energy
into the grid.
The inverter will automatically
attempt to connect again and,
if possible, resume feeding en-
ergy into the grid
Rectification
Error is automatically rectified;
if status code persists: contact
a Fronius-trained service tech-
nician.
Rectification
If status code persists: contact
a Fronius-trained service tech-
nician.
If this status code keeps recur-
ring, contact your system in-
staller.
If status code persists: contact
a Fronius-trained service tech-
nician.
Carry out AC reset (switch au-
tomatic circuit breaker off and
on); update inverter firmware;
If status code persists: contact
a Fronius-trained service tech-
nician.
Update inverter firmware;
If status code persists: contact
a Fronius-trained service tech-
nician.
45