Display Message Causes Solution
E036
Vout Avg error
(Average Vout out
of range)
The average grid voltage value
(every 10 minutes) does not
fall within the allowed ranges.
The grid voltage at the point
connected to the inverter is too
high. This may be caused by
grid impedance that is too high.
Towards the end of the timeout,
the inverter limits the power to
check whether the grid voltage
stabilizes within the normal
parameters. If this does not
happen, the inverter disconnects
from the grid.
Check the grid voltage at the inverter connection
point. If the grid voltage diverges from the range
because of grid conditions, ask the grid company to
adjust the grid voltage. If the grid company authorizes
a change to the inverter parameters, arrange the new
limits with ABB technical support.
E049
Internal error
AC feed-forward
error (for
OLD models -
“degaussing state
fail”)
Internal error. Error inside the inverter and cannot be checked
externally.
E050
AFD Activated
(-A version ONLY -
arc fault protection
was triggered)
An electrical arc has been
detected on DC cables. This
error latches the inverter in a
disconnected state.
Check DC cables and connections to identify
the source of possible arcing. See section 5 of
this manual for more information on Arc Fault
troubleshooting. Press ESC as indicated in the
display in order to unlatch the inverter.
E051
Safety mem. fault
(“Safety” memory
area (ROM or
RAM) was found to
be corrupted)
Internal memory error. There is an error inside the inverter and it cannot be
checked externally.
Turn the inverter off and back on. If the problem
persists, contact ABB technical support.
E053
AFD Fault
(-A version ONLY-
arc fault detector
sensor self-test
failed)
Self-Test performed by AFD
board failed. The board will try
another self-test after user turns
inverter off and on.
Press ESC as indicated in the display in order
to unlatch the inverter. See section 5 for more
information on Arc Fault troubleshooting. If the
problem persists (after switching the inverter off and
on), contact ABB technical support.
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