Code Description Behaviour Remedy
436 Functional incompatibility (one or more
PC boards in the inverter are not com-
patible with each other, e.g. after a PC
board has been replaced)
The inverter will automat-
ically attempt to connect
again and, if possible, will
resume feeding energy
into the grid.
Update inverter firm-
ware; *)
437 Power stage set problem
438 Functional incompatibility (one or more
PC boards in the inverter are not com-
patible with each other, e.g. after a PC
board has been replaced)
The inverter will automat-
ically attempt to connect
again and, if possible, will
resume feeding energy
into the grid.
Update inverter firm-
ware; *)
445 - Compatibility error (e.g. due to
replacement of a PC board)
- Invalid power stage set configura-
tion
The inverter is not feeding
any energy into the grid.
Update inverter firm-
ware; *)
447 Insulation fault (PV or battery)
The inverter is not feeding
any energy into the grid.
*)
450 Guard cannot be found
451 Memory error detected
The inverter will automat-
ically attempt to connect
again and, if possible, will
resume feeding energy
into the grid.
*)
452 Communication error between the pro-
cessors
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 relay is sticking or the neutral con-
ductor ground voltage is too high The inverter is not feeding
any energy into the grid.
Check the grounding
(the neutral conductor
ground voltage must
be less than 30 V); *)
458 Error when recording measuring signal
The inverter is not feeding
any energy into the grid.
*)
459 Error when recording the measuring
signal for the insulation test
460 Reference voltage source for the digital
signal processor (DSP) is working out
of tolerance
461 DSP data memory error
462 Error during DC feed monitoring
routine
463 Reversed AC polarity, AC connector
inserted incorrectly
474 RCMU sensor faulty
The inverter is not feeding
any energy into the grid.
**)
475 Insulation fault (connection between
solar module and ground)
476 Driver supply voltage too low
480,
481
Functional incompatibility (one or more
PC boards in the inverter are not com-
patible with each other, e.g. after a PC
board has been replaced)
The inverter is not feeding
any energy into the grid.
Update inverter firm-
ware; *)
124
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