45
EN
Status codes –
Class 5
Class 5 status codes do not generally interfere with feeding energy into the grid, but can
cause restrictions. These status codes are displayed until they are acknowledged by
pressing a key (however, the inverter continues to operate normally in the background).
457 Grid relay sticking
The inverter is not feeding any
energy into the grid.
Notify a Fronius-trained ser-
vice technician.
459
Error when recording the
measuring signal for the insu-
lation test
460
Reference voltage source for
the digital signal processor
(DSP) is working out of toler-
ance
461 DSP data memory error
462 Error during DC feed monitor-
ing routine
463 Reversed AC polarity, AC con-
nector inserted incorrectly
474 RCMU sensor faulty
The inverter is not feeding any
energy into the grid.
If this status code keeps recur-
ring, contact your system engi-
neer.
475
Solar module ground, insula-
tion fault (connection between
solar module and ground)
476 Driver supply voltage too low
479 Intermediate circuit voltage re-
lay is switched off
The inverter will automatically
attempt to connect again and,
if possible, will resume feeding
energy into the grid.
If the status code is displayed
all the time: Notify a Fronius-
trained service technician.
480
481
Functional incompatibility (one
or more PC boards in the in-
verter are not compatible with
each other, e.g. after a PC
board has been replaced)
The inverter is not feeding any
energy into the grid.
Update inverter firmware;
If the status code is displayed
all the time: Notify a Fronius-
trained service technician.
482 Start-up incomplete
The inverter is not feeding any
energy into the grid.
Perform AC reset (switch auto-
matic circuit breaker off and on
again), complete start-up
483
Voltage U
DC fixed
on MPP2
string out of limits
Check the MPP settings;
If the status code is displayed
all the time: Notify a Fronius-
trained service technician.
485 CAN transmit buffer is full
Perform AC reset (switch auto-
matic circuit breaker off and on
again);
If this status code is displayed
all the time: Notify a Fronius-
trained service technician.
489 Permanent overvoltage on in-
termediate circuit capacitor
(five 479 status codes in a row)
The inverter is not feeding any
energy into the grid.
If the status code is displayed
all the time: Notify a Fronius-
trained service technician.
Code Description Behaviour Remedy
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