Code Description Behaviour
Remedy
438 Functional incompatibility (one or
more PC boards in the inverter are
not compatible with each other, e.g.
after a PC board has been re-
placed)
The inverter will auto-
matically attempt to
connect again and, if
possible, will resume
feeding energy into the
grid
Update inverter firm-
ware; *)
443 Intermediate circuit voltage too low
or asymmetric
The inverter is not feed-
ing any energy into the
grid.
*)
445
-
Compatibility error (e.g. due to
replacement of a PC board)
-
Invalid power stage set config-
uration
The inverter is not feed-
ing any energy into the
grid.
Update inverter firm-
ware; *)
447 Insulation fault
The inverter is not feed-
ing any energy into the
grid.
*)448 Neutral conductor not connected
450 Guard cannot be found
451 Memory error detected
The inverter will auto-
matically attempt to
connect again and, if
possible, will resume
feeding energy into the
grid
*)
452 Communication error between the
processors
453 Grid voltage and power stage set
are incompatible
454 Grid frequency and power stage set
are incompatible
456 Anti-islanding function is no longer
being implemented correctly
457 Grid voltage relay fault The inverter is not feed-
ing any energy into the
grid.
Check AC cable *)
458 Error when recording measuring
signal
The inverter is not feed-
ing any energy into the
grid.
*)
459 Error when recording the measur-
ing signal for the insulation test
460 Reference voltage source for the di-
gital signal processor (DSP) is work-
ing out of tolerance
461 DSP data memory error
462 Error during DC feed monitoring
routine
463 Reversed AC polarity, AC connect-
or inserted incorrectly
474 RCMU sensor faulty
The inverter is not feed-
ing any energy into the
grid.
**)
475 Insulation fault (connection
between solar module and ground)
476 Driver supply voltage too low
105
EN
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