73
EN
Class 4 status
codes
Some of the class 4 status codes necessitate intervention by a Fronius-trained service en-
gineer.
Code
Description
Behaviour
Remedy
401
No communication with power
stage set possible
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 engineer
406
Power stage set temperature
sensor faulty
407
Internal temperature sensor
faulty
412
Fixed voltage mode has been
selected instead of MPP volt-
age mode, and the fixed volt-
age has been set to too low or
too high a value.
-
If this status code keeps recur-
ring, contact your system engi-
neer
415
External Emergency Stop line
is blocked
The inverter is not feeding any
energy into the grid.
Fault is rectified automatically;
If this status code keeps recur-
ring: notify a Fronius-trained
service engineer
416
No communication possible
between power stage set and
control system.
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 engineer
425
No communication possible
with the power stage set
426
Intermediate circuit charging
takes too long
Short-term interruption while
feeding energy into the grid
The inverter resumes with its
startup routine.
Fault is rectified automatically
If this status code keeps recur-
ring, contact your system engi-
neer
427
Power stage set not ready for
too long (timeout)
431
Bootloading process interrupt-
ed
The inverter is in bootloading
mode and is not feeding any
energy into the grid
Repeat the update process
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
436
Receiving incorrect fault infor-
mation from the power stage
set
Short-term interruption while
feeding energy into the grid
The inverter resumes with its
startup routine.
Fault is rectified automatically
If this status code keeps recur-
ring, contact your system engi-
neer
437
General error handling started
in the power stage set
438
Receiving incorrect fault infor-
mation from the power stage
set
445
-
Compatibility error (e.g.
due to replacement of a
PC board)
-
Invalid power stage set
configuration
The inverter is not feeding any
energy into the grid for safety
reasons.
Update the inverter firmware;
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
457
Grid relay sticking
The inverter is not feeding any
energy into the grid.
Notify a Fronius-trained ser-
vice engineer
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
