Status codes –
Class 4
Some of the class 4 status codes necessitate intervention by a Fronius-trained
service technician.
Code Description Behaviour Remedy
401 Unable to communicate with the
power stage set
The inverter will auto-
matically attempt to
connect again and, if
possible, will resume
feeding energy into the
grid
*)
406 AC module temperature sensor
faulty (L1)
407 AC module temperature sensor
faulty (L2)
408 DC component measured in the
grid too high
412 Fixed voltage mode has been selec-
ted instead of MPP voltage mode,
and the fixed voltage has been set
to too low or too high a value.
-
**)
415 Safety cut-out via option card or
RECERBO has triggered
The inverter is not feed-
ing any energy into the
grid.
*)
416 No communication possible
between power stage set and con-
trol system.
The inverter will auto-
matically attempt to
connect again and, if
possible, will resume
feeding energy into the
grid
*)
417 Hardware ID problem
The inverter will auto-
matically attempt to
connect again and, if
possible, will resume
feeding energy into the
grid
Update inverter firm-
ware; *)
419 Unique ID conflict
420 No communication possible with
the Fronius Datamanager
421 HID range error
425 Unable to communicate with the
power stage set
426 -
428
Possible hardware fault
431 Software problem
The inverter is not feed-
ing any energy into the
grid.
Perform AC reset
(switch automatic
circuit breaker off
and on again); up-
date inverter firm-
ware; *)
436 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; *)
437 Power stage set problem
104
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