74
Class 5 status
codes
Class 5 status codes do not generally impede the feeding of energy into the grid, but can
restrict it. A status code is displayed until it is acknowledged by pressing a key (the inverter,
however, continues to operate normally in the background).
461
Fault in the DSP data memory
The inverter is not feeding any
energy into the grid.
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
463
AC polarity reversed
Check the AC polarity
If the status code is displayed
all the time: notify a Fronius-
trained service engineer
486
External NO contact is open
The inverter is not feeding any
energy into the grid.
Check external NO contact;
If this status code keeps recur-
ring, contact your system engi-
neer
487
Air inlet temperature sensor is
faulty
Notify a Fronius-trained ser-
vice engineer
488
AC measurement device is
faulty
Notify a Fronius-trained ser-
vice engineer
490
491
Internal communication error
Notify a Fronius-trained ser-
vice engineer
492
DC main switch is switched off
Switch on DC main switch
493
DC relay is faulty
The inverter is not feeding any
energy into the grid.
Notify a Fronius-trained ser-
vice engineer
494
Grounding fault on the control
board
495
The 3 V supply voltage on the
control board is faulty
496
The 5 V supply voltage on the
control board is faulty
497
The 14 V or 22 V supply volt-
age for the PWM driver is faulty
498
The 24 V supply voltage for the
power electronics is faulty
499
The 24 V supply voltage on the
control board is faulty
Code
Description
Behaviour
Remedy
Code
Description
Behaviour
Remedy
502
Insulation error on the solar
modules
Warning message is shown on
the display
If this status code keeps recur-
ring, contact your system engi-
neer
509
No energy fed into the grid in
the past 24 hours
Acknowledge status code;
Check whether all the condi-
tions for the problem-free feed-
ing of energy into the grid have
been met (e.g. are the solar
modules covered with snow?)
If the status indicator is dis-
played all the time: notify a Fro-
nius-trained service engineer
516
No communication possible
with the storage unit
If the status indicator appears
all the time: notify a Fronius-
trained service engineer
