48
*) If the status code is displayed all the time: Notify a Fronius-trained service technician
**) If this status code keeps recurring, contact your system engineer.
451 Memory error detected
The inverter will automati-
cally 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 in-
compatible
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 sig-
nal 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 in-
serted incorrectly
474 RCMU sensor faulty
The inverter is not feeding
any energy into the grid.
**)
475 Insulation fault (connection between so-
lar module and ground)
476 Driver supply voltage too low
479 Intermediate circuit voltage relay is
switched off
The inverter will automati-
cally attempt to connect
again and, if possible, will
resume feeding energy into
the grid
*)
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; *)
482 Setup interrupted after initial start-up
The inverter is not feeding
any energy into the grid.
Restart Setup after an
AC reset (switch auto-
matic circuit breaker off
and on again)
483 Voltage U
DC fixed
on MPP2 string out of
limits
The inverter is not feeding
any energy into the grid.
Check MPP settings; *)
485 CAN transmit buffer is full
The inverter is not feeding
any energy into the grid.
Perform AC reset
(switch automatic circuit
breaker off and on
again); *)
489 Permanent overvoltage on intermediate
circuit capacitor (five 479 status codes in
a row)
The inverter is not feeding
any energy into the grid.
*)
Code Description Behaviour Remedy
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