44
431
Software problem
Inverter does not feed energy
into the grid.
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.
436
Function incompatibility (one
or more PC boards in the in-
verter are not compatible with
each other, e.g.,after PC board
replacement)
The inverter will automatically
attempt to connect again and,
if possible, resume feeding en-
ergy into the grid
Update inverter firmware;
If status code persists: contact
a Fronius-trained service tech-
nician.
437
Power module problem
438
Function incompatibility (one
or more PC boards in the in-
verter are not compatible with
each other, e.g.,after PC board
replacement)
The inverter will automatically
attempt to connect again and,
if possible, resume feeding en-
ergy into the grid
Update inverter firmware;
If status code persists: contact
a Fronius-trained service tech-
nician.
443
Intermediate circuit voltage too
low or unsymmetrical
Inverter does not feed energy
into the grid.
If status code persists: contact
a Fronius-trained service tech-
nician.
445
Limit value setting not permit-
ted
Inverter does not feed energy
into the grid for safety reasons.
Update the inverter firmware.
If status code persists: contact
a Fronius-trained service tech-
nician.
447
Insulation fault
If this status code keeps recur-
ring, contact your system in-
staller.
448
Neutral conductor not connect-
ed
450
No guard found
451
Memory error detected
The inverter will automatically
attempt to connect again and,
if possible, resume grid power
feed operation.
If status code persists: contact
a Fronius-trained service tech-
nician.
452
Communication problem be-
tween processors
453
Brief grid voltage error
454
Brief grid frequency error
456
Anti-islanding function has
stopped running properly
457
Grid relay stuck
Inverter does not feed energy
into the grid.
If status code persists:
contact a Fronius-trained ser-
vice technician.
459
Error receiving measuring sig-
nal for the insulation test
460
Reference power source for
the digital signal processor
(DSP) is operating outside of
tolerances
461
Error in DSP data memory
462
Error in DC feed-in monitoring
routine
463
AC polarity reversed, AC con-
nector plugged in incorrectly
Code
Description
Details
Rectification
