Class 5 State Codes - Fronius Symo Serie Instructions De Service

Code Description
458 Error during measuring signal detection
459 Error during measuring signal detection
for insulation test
460 Reference voltage source for the digital
signal processor (DSP) is operating out-
side of tolerances
461 Error in DSP data memory
462 Error in DC feed-in monitoring routine
463 AC polarity reversed, AC connector
plugged in incorrectly
474 RCMU sensor faulty
475 Insulation error (connection between so-
lar module and grounding)
476 Supply voltage for driver too low
479 Intermediate circuit voltage relay
switched off
480, Function incompatibility (one or more PC
481 boards in the inverter are not compatible
with each other, e.g., after PC board re-
placement)
482 Setup interrupted after initial commis-
sioning
483 Voltage U
DCfix
of valid range
485 CAN transmission buffer is full
489 Permanent overvoltage at intermediate
circuit capacitor (status code 479 ap-
pears 5x one after the other)
*) If status code persists: Contact a Fronius-trained service technician
**) If status code persists: Contact your system installer
Class 5 state Class 5 state codes generally do not impair grid power feed operation, but can lead to lim-
codes itations. They will be displayed until the state code is acknowledged by pressing a key (the
inverter, however, continues working normally in the background).
Code Description
502 Insulation fault on solar mod-
ules
509
No feed-in within the last
24 hours
54
for MPP2 string is outside
Behavior
Warning message is
shown on the display
Warning message is
shown on the display
Behavior
Inverter does not feed ener-
gy into the grid.
Inverter does not feed ener-
gy into the grid.
The inverter will automati-
cally attempt to connect
again and, if possible, re-
sume feeding energy into
the grid
Inverter does not feed ener-
gy into the grid.
Inverter does not feed ener-
gy into the grid.
Inverter does not feed ener-
gy into the grid.
Inverter does not feed ener-
gy into the grid.
Inverter does not feed ener-
gy into the grid.
Remedy
**)
Acknowledge state code;
Check whether all conditions for
problem-free grid power feed opera-
tion are met (e.g., whether solar mod-
ules are covered with snow); **)
Remedy
*)
**)
*)
Update inverter firm-
ware; *)
Restart setup after AC
reset (switch automatic
circuit breaker off and
on)
Check MPP settings; *)
Carry out AC reset
(switch automatic circuit
breaker off and on); *)
*)